pls help!!
will give the brainliest
plz answer correctly
Urgent!!!​

Pls Help!!will Give The Brainliestplz Answer CorrectlyUrgent!!!

Answers

Answer 1

Answer:

for number 2

Explanation:

Hydrogen. Hydrogen ignites in air. If hydrogen is present in a test tube, a lighted splint held near its mouth ignites with a squeaky pop.

Answer 2
Mg(s) + 2HCL(aq) ———->MgCl2 (aq) + H2 (g)
TEST: use a burning splint
If hydrogen is present it will burn with a pop sound.
C) Copper
D) Iron
Pls Help!!will Give The Brainliestplz Answer CorrectlyUrgent!!!

Related Questions

What is the shape of the following molecule? AIF_3

Answers

Answer:

AI + F2 = AIF3

Explanation:

Answer:

The molecular geometry of AlF3 is trigonal planar with a symmetric charge distribution on the central atom. Therefore this molecule is non-polar.

Which series represents the flow of thermal energy in a home with a refrigeration cooling system?
Inside air coolant in cooling system – outside air
X Fuel
- air inside piston chamber piston movement
Inside air
outside air
Fuel
Inside air​

Answers

Answer

A is the answer

Answer: A








Hope that helps:)

If you are trying to measure an
electric current and need to describe the quantity
and units, how will you describe the units?

Answers

Answer:

Usually you have V, for voltage, Ohms for resistance, and Coulombs for charge.

Explanation:

See the image attached :)

You would use v for Volta

Is your prediction supported by the membrane potential chart? Explain your answer.

Answers

Answer:

Yes, it is. The chart shows that the initial charge of the neuron is negative. When the neuron is stimulated, sodium ions enter the cell. So, the voltage inside the cell changes to positive. When potassium ions move outward, the voltage decreases until it reaches its previous state.

Explanation:

answer on edmentum

calculate the number of moles equivalent to 12.7 gram of iodine molecule ​

Answers

[tex] \LARGE{ \boxed{ \purple{ \rm{Answer}}}}[/tex]

☃️ Chemical formulae ➝ [tex]\sf{I_2}[/tex]

How to find?

For solving this question, We need to know how to find moles of solution or any substance if a certain weight is given.

[tex] \boxed{ \sf{No. \: of \: moles = \frac{Given \: weight}{Molecular \: weight} }}[/tex]

Solution:

❍ Molecular weight of [tex]\sf{I_2}[/tex]

= 2 × 126.90

= 253.80

= 254 (approx.)

❍ Given weight: 12.7

Then, no. of moles,

⇛ No. of moles = 12.7 / 254

⇛ No. of moles = 0.05 moles

⚘ No. of moles of Iodine molecule in the given weight = 0.05 moles

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Answer:

The answer is 0.05 mol

Explanation:

To find the number of moles (n) we use the formula

[tex]n = \frac{m}{M} [/tex]

Where

n is the number of moles

m is the mass of the substance

M is the molar mass

To find the number of moles we must first find the molar mass

Since iodine is a diatomic molecule

M( I ) = 127 × 2 = 254 g/mol

Mass of iodine = 12.7 g

So the number of moles in 12.7 g of iodine is

[tex]n = \frac{12.7 \: g}{254 \: g/mol} [/tex]

We have the final answer as

n = 0.05 mol

Hope this helps you

what errors can lead to pseudocience?

Answers

Answer:

pseudocience consists of statements, belief or practices that are claimed to be both scientific and factual but are incompatible with the scientific method.

         Errors

use of vague, exaggerated or untestable  claims.over-reliance on confirmation rather than refutation.lack of opennes to testing by other experts.absence of progress.personalization of issues.use of misleading language.

Answer: a prediction or analystment that they though could be a good idea, I said it like this so it would of makes more sense

Study this chemical reaction:
Ti+02 - TiO2
Then, write balanced half-reactions describing the oxidation and reduction that happen in this reaction.
oxidation:

reduction:​

Answers

Answer:

oxidation:Ti to Ti           Reduction:O2 toO2

Explanation:

oxidation loses electron while Reduction gains electron

-8 because you need to subtract

Is there any evidence that a reaction has occurred?


current is changed

a precipitate is formed

the amount of ion in solution has changed

(pick one out of the three)

Answers

Answer:

A precipitate is formed

Explanation:

A precipitate is formed.

The lock-and-key mechanism refers to
the complementary shapes of an enzyme and a substrate.
the attractive forces between an enzyme and a substrate.
the ability of an enzyme to lower the activation energy of a reaction.
the ability of an enzyme to "unlock" the products of a reaction.

Answers

Answer:

A). The complementary shapes of an enzyme and a substrate.

Explanation:

The Lock-and-key mechanism was proposed by Emil Fischer for the first time and characterized as the metaphor which helps in elucidating the specificity of the enzymatic reactions. In this metaphor, the lock is described as the enzyme while 'key' is characterized as the substrate which the enzyme acts upon. If the key is not appropriately sized, it will not fit into the active site i.e. the keyhole of the lock or enzyme and reaction will not take place. Thus, option A is the correct answer.

the complementary shapes of an enzyme and substrate

Suppose 300 mL of 0.50 M lithium bromide solution and 300 mL of 0.70 M rubidium bromide solution are combined. What is the concentration of the bromide ion in the resulting solution?

Answers

Answer:

0.60 mol·L⁻¹  

Explanation:

Data:  

LiBr: c = 0.50 mol/L; V =300 mL

RbBr: c = 0.70 mol/L; V =300 mL

1. Calculate the moles of Br⁻ in each solution

(a) LiBr

[tex]\text{Moles} = \text{0.300 L} \times \dfrac{\text{0.50 mol}}{\text{1 L}} = \text{ 0.150 mol}[/tex]

(b) RbBr

[tex]\text{Moles} = \text{0.300 L} \times \dfrac{\text{0.70 mol}}{\text{1 L}} = \text{ 0.210 mol}[/tex]

2. Calculate the molar concentration of Br⁻

(a) Moles of Br⁻

n = 0.150 mol  + 0.210 mol = 0.360 mol

(b) Volume of solution

V = 300 mL + 300 mL = 600 mL = 0.600 L

(c) Molar concentration

[tex]c = \dfrac{\text{moles}}{\text{litres}} = \dfrac{\text{0.360 mol}}{\text{0.600 L}} = \textbf{0.60 mol/L}[/tex]

 

The concentration of Br ions in the resulting solution of LiBr and RbBr has been 0.6 M.

The addition of LiBr and RbBr has been dissociated into the equal moles of Li, Rb, and Br.

[tex]\rm LiBr\;\rightarrow\;Li^+\;+\;Br^-[/tex]

[tex]\rm RbBr\;\rightarrow\;Rb^+\;+\;Br^-[/tex]

Thus 1 mole of LiBr = 1 mole Br

1 mole RbBr = 1 mole Br.

The moles of LiBr in 0.5 M solution:

Molarity = [tex]\rm moles\;\times\;\dfrac{1000}{volume\;(ml)}[/tex]

0.5 = [tex]\rm moles\;\times\;\dfrac{1000}{300\;ml}[/tex]

Moles of LiBr = 0.15 mol

The moles of Br from LiBr = 0.15 mol.

The moles of RbBr in 0.7 M solution:

Molarity = [tex]\rm moles\;\times\;\dfrac{1000}{volume\;(ml)}[/tex]

0.7 = [tex]\rm moles\;\times\;\dfrac{1000}{300\;ml}[/tex]

Moles of RbBr = 0.21 mol

The moles of Br from RbBr = 0.21 mol.

The total moles of Br ions from LiBr and RbBr has been :

= 0.15 + 0.21

= 0.36 mol.

The total volume of the solution will be:

= 300 + 300 ml

= 600 ml.

The concentration of the Br ion has been:

Molarity = [tex]\rm moles\;\times\;\dfrac{1000}{volume\;(ml)}[/tex]

Molarity of Br ions =  [tex]\rm 0.36\;\times\;\dfrac{1000}{600\;ml}[/tex]

Molarity of Br ions = 0.6 M.

The concentration of Br ions in the resulting solution of LiBr and RbBr has been 0.6 M.

For more information about the concentration of the sample, refer to the link:

https://brainly.com/question/11804141

How many moles of steam, H 2 O react with 1 mol of charcoal, Caccording to the balanced chemical equation? C(s)+H 2 O(g)\ \ CO(g)+H 2 (g)

Answers

Answer:

1 mol

Explanation:

Given:

C(s) + H₂O(g) → CO(g) + H₂(g)

According to the given equation, we can say that 1 mol of steam( H₂O ) reacts with  1 mol of charcoal.

So, 1 mol of steam( H₂O ) is the correct answer.

The answer would be 1 mil

1) what is formed when hydrogen burns ? write the equation for the reaction .
2) why do you think that, when hydrogen burns, the flame Rises quickly ?​

Answers

Answer:

formed by burns rises quickly hydorogen

[tex] H_2+\frac12O_2 \longrightarrow H_2O[/tex]

I don't think I need to name the product.

this reaction is very exothermic. so the gases and the flames are very hot, i.e. very lighter (hot air rises) than the normal air. so it rises quickly

Glucose has formula C6 H12 O6.
Calculate the number of Hydrogen atoms present in 18 g of glucose

please help​​

Answers

The answer is 6.0•1022
I’m sorry I’m working on this one too

Use the potential energy diagram shown to answer the following: Which letter shows the activation energy(without use of a catalyst)

Answers

Answer:

a

Explanation:

Activation energy is the minimum amount of energy that must be overcome before a reaction will proceed to product.

In the energy diagram, the thick line represent the uncatalyzed path while the broken line line indicates the catalyzed path.

In the diagram above, the letter between the reactant and the Peak of the diagram gives the activation energy. This letter is a.

Therefore, the activation energy for the uncatalyzed reaction is 'a'.

the answer to this question is a because yu use the diagram

How many lead (Pb) atoms will be generated when 5.38 moles of ammonia react according to the following equation: 3PbO+2NH3→3Pb+N2+3H2O?
A) 1.62 × 10^24
B) 4.86 × 10^23
C) 2.43 × 10^24
D) 4.86 × 10^24

Answers

Answer:D. Is the correct answer

Explanation:

Following are the calculation of the lead (Pb) atoms:

Balanced reaction:  

[tex]\bold{3PbO+2NH_3\longrightarrow 3Pb+N2+3H2O}\\\\[/tex]

[tex]\bold{mol\ NH_3 \longrightarrow mol \ Pb \longrightarrow atoms \ Pb}[/tex]

Calculating the number of atoms in Pb that will be generated:

[tex]=5.38 \ mol \ NH_3 \times \frac{3\ mol\ Pb}{2 \ mol NH_3} \times \frac{6.022 \times 10^{23} \times pb}{1 \ mol \ pb}\\\\ = 4.86 \times 10^{24} \ atoms\ in \ Pb\\\\= 4.86 \times 10^{24} \ atoms \\[/tex]

Therefore, the answer is "Option D"

Learn more:

brainly.com/question/21092165

Enumerate any two differences between simple distillation and fractional distillation.

Answers

Answer:

Explanation:

By simple distillation, we can separate tow miscible liquids having sufficient difference in their boiling points.

By fractional distillation, we can separate the mixture of two or more miscible liquids for which the difference in their boiling point is less than 25k

Simple distillation is done using an air condenser or water condenser.

Fractionating column is fitted in between the distillation flask and the condenser for the process.

Simple distillation eg: mixture of water and acetone

fractional distillation eg: crude oil

hope this helps

plz mark as brainliest!!!!!!

Answer:

Simple Distillation:

1)This method is used for the separation of components of a mixture containing two miscible liquids that boil without decomposition.

2)The components must have sufficient difference in their boiling points.

Fractional Distillation:

1)Fractional distillation process is used to separate a mixture of two or more miscible liquids.

2)If, the components have the difference in boiling points less than 25K .                                                                              

remember that it takes 2 electrons to form a bond how many bonds does CIO 3 - have, the chlorate ion

Answers

Answer:

3 bonds

Explanation:

solve this by doing the lewis structure for CIO3

Answer:

3 bonds.

Explanation:

2 double bonds and one single bond.

A piece of unknown metal weighs 500 g. When the piece of metal absorbs 6.64 kJ of heat, its temperature increases from 25°C to 78°C. What's the specific heat capacity
of this metal?
A. 13 J/gºC
B. 0.25 J/gºC
C. 25 J/gºC
D.2.5 J/g °C

Answers

6.64×1000÷(78-25)×500=0.25 g/k

Answer:

6.64×1000÷(78-25)×500=0.25 g/k

A substance X contains 10 gram of calcium carbonate calculate the number of oxide of calcium carbonate present in x​

Answers

Answer:

x contain 9 percent ofcalcium carbonaye

The answer could be x = 10 of calcium

Electronic configuration is best described as
a. protons in the nucleus of atom
b. electrons on the outermost orbit
c. attraction of electrons between two atoms
d. arrangement of electrons in an atom​

Answers

Answer:

d

Explanation:

The arrangement of electrons in an atom

Answer:

D. Arrangement of electrons in an atom.

Explanation:

K L M N O P Q

2 8 8 18 18 32 50

The path where electrons revolve is called orbits.

Hope his helps ;) ❤❤❤

calculate the percentage by mass of chlorine in Cobalt (II) chloride (cocl2)​

Answers

Explanation:

Divide the mass of chlorine by the molar mass of cobalt chloride, then multiply by 100.

Molar Mass of Cobalt Chloride.

Mass of Chlorine in Cobalt Chloride.

Percent Composition of Chlorine.

Divide the mass of chlorine by the molar mass of cobalt chloride, then multiply by 100.
Molar Mass of Cobalt Chloride.
Mass of Chlorine in Cobalt Chloride.
Percent Composition of Chlorine.
Mar 16, 2016

calculate the number of moles equivalent 10.0 gram of aluminium carbonate ​

Answers

[tex] \LARGE{ \boxed{ \red{ \rm{Answer}}}}[/tex]

☃️ Chemical formulae ➝ [tex]\sf{Al_2(CO_3)_3}[/tex]

How to find?

For solving this question, We need to know how to find moles of solution or any substance if a certain weight is given.

[tex] \boxed{ \sf{no. \: of \: moles = \frac{given \: weight}{molecular \: weight} }}[/tex]

Solution:

❍ Molecular weight of [tex]\sf{Al_2(CO_3)_3}[/tex]

= 2 × 27 + 3 × 12 + 9 × 16

= 54 + 36 + 144

= 234

❍ Given weight: 10 g

Then, no. of moles,

⇛ No. of moles = 10 / 234

⇛ No. of moles = 0.0427 moles

⚘ No. of moles of Aluminium carbonate in the given weight = 0.0427 moles.

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ok it’s gonna be the c= 12

calculate the number of moles equivalent to 25.0 gram of copper II sulfate pentahydrate [CuSO4 5H2O]​

Answers

Answer:

The answer is 0.1 mol

Explanation:

To calculate the number of moles in the given substance we use the equation

[tex]n = \frac{m}{M} [/tex]

where

n is the number of moles

M is the molar mass

m is the mass of the substance

To calculate the number of moles we must first find the molar mass

That's

M( CuSO4 5H2O )

Cu = 64 , S = 32 , O = 16 H = 1

So we have

M( CuSO4 5H2O ) = 64 + 32 + (16 × 4) +

5( 2 + 16)

M( CuSO4 5H2O ) = 96 + 64 + 5(18)

M( CuSO4 5H2O ) = 160 + 90

M( CuSO4 5H2O ) = 250 g/mol

M( CuSO4 5H2O ) = 250 g/mol

mass of CuSO4 5H2O = 25 g

Substitute the values into the above formula

That's

[tex]n = \frac{25g}{250 \: g/mol} [/tex]

We have the final answer as

n = 0.1 mol

Hope this helps you

[tex] \LARGE{ \boxed{ \blue{ \rm{Answer}}}}[/tex]

☃️ Chemical formulae ➝ [tex]\sf{CuSO_4.5H_2O}[/tex]

How to find?

For solving this question, We need to know how to find moles of solution or any substance if a certain weight is given.

[tex] \boxed{ \sf{No. \: of \: moles = \frac{Given \: weight}{Molecular \: weight} }}[/tex]

Solution:

Atomic weight of Elements:

Cu = 64S = 32O = 16H = 1

❍ Molecular weight of [tex]\sf{CuSO_4.5H_2O}[/tex]

= 64 + 32 + (16 × 4) + 5(2 × 16)

= 96 + 64 + 90

= 250 g/mol

❍ Given weight: 25 g

Then, no. of moles,

⇛ No. of moles = 25 g/ 250 g mol‐¹

⇛ No. of moles = 0.1 moles

⚘ No. of moles of Copper Sulphate pentahydrate in the given weight = 0.1 moles.

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Given the connection between Aw and K (Aw=2k) could you use the ideal gas law and derive the Boltzmann constant. Water freezes at 546.3 Aw and absolute zero is at 0 Aw. (Aw is an arbitrary temperature scale.)

solved, divide boltzmann constant by 2

Answers

Answer:

tails of comets

the ionosphere

a neon sign

Explanation:

Molar mass is reported on the periodic table in the units

A. kg/m3
B. grams/mole.
C. moles/gram.
D. atoms/gram.

Answers

Answer:

[tex]\boxed{\sf B. \ grams/mole}[/tex]

Explanation:

[tex]\sf The \ molar \ mass \ of \ a \ substance \ is \ the \ mass, \ in \ grams,\ per \ one \ mole.[/tex]

[tex]\displaystyle \sf \frac{grams}{mole}[/tex]

Answer:

B

Explanation:

Grams/mole is correct. Got right on test!

A subtance X contains 10 gram of calcium carbonate calculate the number of oxygen atom present in 10 gram of calcium carbonate ​

Answers

[tex] \LARGE{ \boxed{ \rm{ \purple{Required \: answer}}}}[/tex]

☃️ Chemical formulae ➝ [tex]\sf{CaCO_3}[/tex]

How to find?

For solving this question, We need to know how to find moles of solution or any substance if a certain weight is given.

[tex] \boxed{ \sf{No. \: of \: moles = \frac{given \: weight}{molecular \: weight} }}[/tex]

And, Then we need to find the number of molecules which can be found by:

[tex] \large{ \boxed{ \sf{no. \: of \: molecules = N_A \times no. \: of \: moles}}}[/tex]

Here, Na = Avagadro Number (6.022 × 10²³)

☀️ As it is a compund, We considered molecules. Then, we can predict the no. of atoms of elements in one molecule of compound and get the answer.

Solution:

Atomic weight of elements:

Ca = 40C = 12O = 16

❍ Molecular weight of [tex]\sf{CaCO_3}[/tex]

= 40 + 12 + 3 × 16

= 52 + 48

= 100 g/mol

❍ Given weight: 10 g

Then, no. of moles,

⇛ No. of moles = 10 g / 100 g mol‐¹

⇛ No. of moles = 0.1 moles

☄ No. of moles of Calcium carbonate in the given weight = 0.1 moles

Finding no. of molecules,

⇛ No. of molecules of CaCO3 = 0.1 × 6.022 × 10²³

⇛ No. of molecules of CaCO3 = 6.022 × 10²²

Now,

1 molecule of [tex]\sf{CaCO_3}[/tex] = 3 atoms of Oxygen.

Then, 6.022 × 10²² molecules will have,

= 3 × 6.022 × 10²² atoms of oxygen

= 18.022 × 10²² atoms of oxygen

In more scientific form,

= 1.8022 × 10²³ atoms of oxygen

☄ Hence, Final answer - 1.8022 × 10²³ atoms

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CaCo3 is the answer to this

A substance X contains 10 gram of calcium carbonate calculate the number of oxide of calcium carbonate present in X ​
please help

Answers

Answer:

I got 0.01 moles, hope this helps!

First you have to calculate the number of moles of caco3 ! Use n=m/M ! YOH will get 0.1 moles ! By using stiochiometry you will get


O3/Caco3 = 48/100 (molar masses ) = x/0.1. ( using moles ) then you will get x = 0.048 moles

Which ionic equation for reaction of Magnesium with dilute hydrochloric acid is correct? Mg (s) + 2H+ (aq) â Mg2+ (aq) + H2 (g) Mg (s) + 2HCl (aq) â MgCl2+ (aq) + H2 (g) Mg (s) + 2H+ (aq) â Mg2+ (s) + H2 (g) Mg (s) + H+ (aq) â Mg+ (aq) + H2 (g)

Answers

Answer:

Mg(s) + 2H⁺(aq) ⟶ Mg²⁺(aq) + H₂(g)  

Explanation:

A net ionic equation shows all the ionic substances as ions and shows the correct state of each substance.

B. is wrong. HCl ionizes in aqueous solution into H⁺ and Cl⁻.

C. is wrong. Mg²⁺ is not a solid. It is an aqueous ion.

D. is wrong. The equation needs 2H⁺(aq) to be balanced.

I thought in the third shell there are 18 electrons, but why are they gaining only 2 electrons?? Pls tell me... I have exam tomorrow....

Answers

Use this picture to understands.
The picture will help you understand

Ice sinks in methanol, but floats on water. From this we can conclude: A The density of ice in methanol must be different from that in water. B The density of water must be less than the density of methanol. C The density of ice must be greater than the density of water. D The density of methanol must be less than the density of water.

Answers

Answer:

A

Explanation:

Density: water>ice>methanol

Ice is lighter than methanol hence it is able to float on it. However, ice is denser than water hence it sinks.

Answer:

The answer is A.

Explanation:

The density of ice in methanol must be different from that in water.

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What type of function is graphed in this figure?Question 20 options:A)Continuous non-linearB)Discrete linearC)Discrete non-linearD)Continuous linear ind the missing length. The triangles are similar. similar 16 A. 27 B. 24 C. 16 D. 21 Protestant values such as asceticism and entrepreneurship as a result of the belief that success on earth could lead to salvation, and a fervent individualism due to the belief that only individuals could be saved lead, in the right conditions, to the rise of capitalism. Who made this argument Literary Text: from The Devil's Dictionary, Ambrose BierceRead these entries from The Devil's Dictionary by Ambrose Bierce.Then, answer the question(s).Which statement best describes Bierce's tone and purpose?O Bierce uses an angry tone to condemn the sins of humanity.OBBierce uses a cynical tone to ridicule human behavior andsocietyO.Bierce uses a lighthearted tone to educate humanity in agentle way.DBierce uses a reprimanding tone to encourage humanbeings to improveABSURDITY n. A statement or belief manifestly inconsistentwith one's own opinion.ACADEME n. An ancient school where morality andphilosophy were taught.ACADEMY n. [from ACADEME] A modern school wherefootball is taughtBORE n. A person who talks when you wish him to listen.CABBAGE n. A familiar kitchen-garden vegetable about aslarge and wise as a man's head. [The cabbage is so calledfrom Cabagius, a prince who on ascending the throne issued adecree appointing a High Council of Empire consisting of themembers of his predecessor's Ministry and the cabbages in theroyal garden. When any of his Majesty's measures of statepolicy miscarried conspicuously it was gravely announced thatseveral members of the High Council had been beheaded, andhis murmuring subjects were appeased.] Given the linear correlation coefficient r and the sample size n, determine the critical values of r and use your finding to state whether or not the given r represents a significant linear correlation. Use a significance level of 0.05. r=0.767, n=25 Emma changed 500 into rand before going on holiday to South Africa.The rate of exchange at the time was 1 = 10.4 rand.Emma spent 4000 rand on holiday. When she got home, she changed her leftover rand into pounds.The exchange rate was now 1 = 9.8 rand. How much money did she get back in pounds? Journalize the following sales transactions for Salem Sportswear. Explanations are not required. Aug. 1 Salem sold $69,000 of women's sportswear on account, credit terms of 3 / 10, n / 60. Cost of goods is $38,000. 5 Salem received a $3,500 sales return on damaged goods from the customer. Cost of goods damaged is $1 ,750. 10 Salem receives payment from the customer on the amount due, less the return and discount.Journalize the sales transactions.Aug 1 : Salem sold $69,000 of women's sportswear on account, credit terms of 3 / 10, n / 60. Cost of goods is S38,000. Begin by preparing the entry to journalize the sale portion of the transaction. Prepare the journal entry to record Jevonte Companys issuance of 35,000 shares of its common stock assuming the shares have a: $3 par value and sell for $22 cash per share. $3 stated value and sell for $22 cash per share. The block moves up an incline with constant speed. What is the total work WtotalWtotalW_total done on the block by all forces as the block moves a distance LLL Miller Fruit wants to expand and needs $1.6 million to do so. Currently, the firm has 465,000 shares of stock outstanding at a market price per share of $32.50. The firm decided on a rights offering with one right granted for each share of outstanding stock. The subscription price is $28 a share. How many rights are needed to purchase one new share of stock in this offering?Miller Fruit wants to expand and needs $1.6 million to do so. Currently, the firm has 465,000 shares of stock outstanding at a market price per share of $32.50. The firm decided on a rights offering with one right granted for each share of outstanding stock. The subscription price is $28 a share. How many rights are needed to purchase one new share of stock in this offering? Perform the operation. (3x^2+4)-(-5x^2+4x-1) The magnetic field of a plane-polarized electromagnetic wave moving in the z-direction is given by in SI units. What is the frequency of the wave group the like term together Facial Cosmetics provides plastic surgery primarily to hide the appearance of unwanted scars and other blemishes. During 2021, the company provides services of $402,000 on account. Of this amount, $52,000 remains uncollected at the end of the year. An aging schedule as of December 31, 2021, is provided below. Age Group Amount Estimated Percent Receivable Uncollectible Not yet due $ 32,000 4 % 0-30 days past due 10,200 6 % 3160 days past due 7,200 12 % More than 60 days past due 2,600 30 % Total $ 52,000 Required: 1. Calculate the allowance for uncollectible accounts. 2. Record the December 31, 2021, adjustment, assuming the balance of Allowance for Uncollectible Accounts before adjustment is $400 (debit). 3. On April 3, 2022, a customers account balance of $500 is written off as uncollectible. Record the write-off. 4. On July 17, 2022, the customer whose account was written off in requirement 3 unexpectedly pays $100 of the amount but does not expect to pay any additional amounts. Record the cash collection.