Answers
Answer:
YIKES. a bit late. Answers include 1, 2, 3
Explanation:
Related Questions
Measure that affects the thermal energy of matter but not it's temperature.
Answers
Answer: mass
Explanation:
A gas has a boiling point of 175 celsius. At what kelvin temperature would this gas boil
Answers
Answer:
448
Explanation:
K =273+°c
K=273+175
K=448
what is a physical quantity
Answers
How many grams of Fe3+ are present in 2.56 grams of iron(III) iodide?
Answers
Answer:
436.55841 grams.
Explanation:
The molecular formula for Iron(III) Iodide is FeI3. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Iron(III) Iodide, or 436.55841 grams.
You use the 1 / 436.55841 conversion rate. This is different for each element, according to the stoichiometry tables. Iron(II) oxide would be 2/3 of the 1/436.55841 conversion rate, that is, multiplying the fraction to denominator.
How many molecules are equal to 89.23g of calcium oxide
Answers
Answer:
1.593 moles
Explanation:
Therefore, 1.593 moles are equal to 89.23 g of calcium oxide.
Answer:
9.64 × 10²³ molecules
Explanation:
Given data:
Mass of calcium oxide = 89.23 g
Number of molecules = ?
Solution:
First of all we will calculate the number of moles of calcium oxide.
Number of moles = mass/molar mass
Number of moles = 89.23 g/ 56.1 g/mol
Number of moles = 1.6 mol
Number of molecules;
1 mole contain 6.022 × 10²³ molecules
1.6 mol × 6.022 × 10²³ molecules / 1mol
9.64 × 10²³ molecules
The number 6.022 × 10²³ is called Avogadro number.
6. What is the equilibrium constant for the following reaction?
C+02 = CO2
Answers
Given
Reaction
C+02 = CO2
Required
The equilibrium constant
Solution
The equilibrium constant is the ratio of concentration or pressure between the product and the reactant with each reaction coefficient raised
The equilibrium constant is based on the concentration (Kc) in a reaction
pA + qB -----> mC + nD
[tex]\large {\boxed {\bold {Kc ~ = ~ \frac {[C] ^ m [D] ^ n} {[A] ^ p [B] ^ q}}}}[/tex]
So for the reaction :
C+O₂ ⇔ CO₂
[tex]\tt Kc=\dfrac{[CO_2]}{[C][O_2]}[/tex]
Which best describes why NH4+ can form an ionic bond with Cl–?
Its outermost shell gains one or more electrons from Cl–.
Its positive charge is attracted to the negative charge of Cl–.
It has a negative charge that is spread over the entire ion.
It has a nitrogen atom that is strongly attracted to Cl–.
Answers
Answer:
Its positive charge is attracted to the negative charge of Cl–.
Explanation:
The best description of why NH₄⁺ forms an ionic bond with Cl⁻ is that its positive charge is attracted to the negative charge of Cl⁻.
An ionic bond forms as a result of transfer of electrons. As a result the seemingly metal ion is attracted to the negative non-metal ion.
The electrostatic force of attraction between these ions is the ionic or electrovalent bond.
So, the attraction between these opposite charges will form the ionic bond.
Answer:
B: Its positive charge is attracted to the negative charge of Cl–
Explanation:
right on edge2021
in a double replacement reaction cesium chloride reacts with silver nitrate to produce silver chloride and
a cacl
b cs(no3)2
c agcs
d csno3
Answers
Answer:
CsNO₃
Explanation:
The reactants are:
Cesium chloride = CsCl
Silver nitrate = AgNO₃
Products:
Silver chloride = AgCl
The other product:
Now;
CsCl + AgNO₃ → AgCl + ?
The other product is CsNO₃
So;
CsCl + AgNO₃ → AgCl + CsNO₃
Mr. Smith wanted to see if the color of light shined on a plant had an effect on the number of leaves it had. He gathered a 2
groups of the same species of plants, gave them the same amount of water, and did the test for the same amount of time.
On one group of plants he used white light. On the second group he changed the light color to red. Identify:
Independent variable:
Dependent variable:
Constants:
Control group (What would Mr. Smith use as a control group?):
Experimental group (what would Mr. Smith use as a experimental group?)
Answers
Copper metal reacts with silver nitrate to produce silver metal and copper (II) nitrate.
the correct equation for this reaction is:
A: Cu + SiN—> Si + Cu2N
B: 2Cu + AgNO3–> Ag +
Cu(NO3)2
C: Cu + 2 AgNO3–> Ag + Cu(NO3)2
D:Cu + AgNO3–> Ag + CuNO3
Answers
Answer:
Cu + 2AgNO₃ → 2Ag + Cu(NO₃)₂
Explanation:
The reactants are:
Copper metal = Cu
Silver nitrate = AgNO₃
The products are:
Silver metal = Ag
Copper (II) nitrate = Cu(NO₃)₂
So, the reaction equation is given as;
Cu + 2AgNO₃ → 2Ag + Cu(NO₃)₂
This is a single displacement reaction
A certain solid element is better electrical conductor than sulfur, but a poorer electrical conductor than copper. Which of the following elements is most consistent with this information.
a) germanium b) oxygen c) potassium d) mercury e) neon
Answers
Pressure is often defined as
Answers
Answer:
Pressure is often defined as a measure of force applied on an area, or over a unit area.
Explanation:
Need help asap
1. All nonmetals (except hydrogen) have 8 valence electrons?
True or False
2. The N^-3 ion is classified as a(n) ____ and has ____.
A. anion, 8 valence electrons
B. cation, 8 valence electrons
C. anion, 15 valence electrons
D. anion, 3 valence electrons
3. If two nonmetals react to form a compound and have very different _____ they form ____ bonds. If there is a small difference, then they form ____ bonds.
A. ionization energy; covalent; nonpolar ionic
B. electronegativity; nonpolar covalent; polar covalent.
C. ionization energy, ionic, nonpolar covalent
D. electronegativity, polar covalent, nonpolar covalent.
Answers
Answer:
1: false
2: B
Explanation:
I do not know the 3rd one
Sns
Station 5
Find the formula for the following
compounds:
Chromium (II) Oxide
Chromium (III) Oxide
Lead (II) Phosphide
Mercury (0) Sulfide
Manganese (11) Nitride
Answers
what is the mass in grams of 0.40 moles of sodium borohydride nabh4
Answers
Answer:
15.12g
Explanation:
Given parameters:
Number of moles = 0.4moles
Unknown:
Mass of the compound = ?
Solution:
To solve this problem;
Mass = number of moles x molar mass
Molar mass of NaBH₄ = 23 + 10.8 + 4(1) = 37.8g/mol
Mass of the compound = 0.4 x 37.8 = 15.12g
Answer:
The answer is 15.12 g but if you are taking this test on ck12 make sure you round it to 15 like it says on the directions :) good luck
the gravitational force between two objects depends on the distance between the objects and each object?
Answers
Answer:
Gravitational force between two objects depends on: a. The weight of the objects c. The mass of each object b. The distance between the objects d. Both b and c Please select the best answer from the choices provided A B C D
✓d
. What were the main inventions of the industrial revolution? What changes did they bring about ?
Answers
Answer:
The Industrial Revolution was a period of great industrialization that began in the late 18th century in Britain, leading to massive population growth and agricultural innovations, which laid the foundation for increased productivity, both with increased labor and a larger market for the products. There was a revolution in the production methods of the textile industry, especially with the advent of the steam engine and urban development, the influx of people from the countryside to the cities meant that there was an abundance of labor, which laid the foundation for the industrial cities of the nineteenth century. The steam engine was also used in the new generation of transport, in locomotives and steamships. With the advent of steel as a building material along with a series of new discoveries in communication technology in the second half of the 19th century, the tone was set for the continued technological development of the 20th century.
Diana has just completed a reaction that had a chemical change. Which two changes could be evidence of this change?
color and odor
color and shape
odor and density
shape and density
Answers
Answer:
I think its A im sorry if im wrong
Explanation:
Answer:
color and odor
Explanation:
Kp/Kc for reaction for the equilibrium, A(g) ⇌ C(g)+B(g), is _______.
(Kc is the equilibrium constant in terms of concentrations, Kp is the equilibrium constant in terms of pressures, R is the gas constant, T is the temperature)
Select one:
(RT)2
(RT)-1
(RT)-2
(RT)-1.5
RT
Answers
Kp/Kc = RT
Further explanationGiven
Reaction
A(g) ⇌ C(g)+B(g)
Required
Kp/Kc
Solution
For reaction :
pA + qB ⇒ mC + nD
[tex]\large {\boxed {\bold {Kc ~ = ~ \frac {[C] ^ m [D] ^ n} {[A] ^ p [B] ^ q}}}}[/tex]
While the equilibrium constant Kp is based on the partial pressure
[tex]\large {\boxed {\bold {Kp ~ = ~ \frac {[pC] ^ m [pD] ^ n} {[pA] ^ p [pB] ^ q}}}}[/tex]
The value of Kp and Kc can be linked to the formula '
[tex]\large {\boxed {\bold {Kp ~ = ~ Kc. (R.T) ^ {\Delta n}}}}[/tex]
R = gas constant = 0.0821 L.atm / mol.K
Δn=moles products - moles reactants or
number of product coefficients-number of reactant coefficients
For reaction :
A(g) ⇌ C(g)+B(g)
number of product coefficients = 1+1=2
number of reactant coefficients = 1
Δn= 2 - 1 =1
So Kp/Kc = RT
Complete the chemical equation and name the type of reaction taking place.
In the problem below, the ions have the following charges: Γ-2 and φ-2
H2Γ + φ(OH)2 -->
PLEASE HELP
Answers
Convert 0.760 atm to mmHg
Answers
Answer:
577.6 mmHg
Explanation:
What is the conversion between atm (standard atmosphere) and mmHg (millimeters of mercury)?
Multiply the atm amount by 760 to get the mmHg amount.
19/25 * 760/1
19/5 * 152/1
(19*152)/5
2888/5
577 3/5 or 577.6 mmHg
Red blood cells are constantly being produced in your body. Another body system cooperates with the cardiovascular system in the production of these cells. What is this system and how does it cooperate?
Answers
How much drug should be used in preparing 50mL of solution such that 5 mL diluted 500mL will yield 1:1000 solution?
Answers
How much silver nitrate should be used in preparing 50 mL of a solution such that 5 mL diluted to 500 mL will yield a 1 : 1000 solution?
1 : 1000 means 1 g of silver nitrate in 1000 mL of solution
1000 mL = 1 g 500 mL X g
X = 0.5 g of silver nitrate in 500 mL of diluted solution (1 : 1000), which is also the amount in 5 mL of the stronger (stock) solution, since the 50 mL and the 5 mL are the same strength.
5mL/50ml = 0.5g/Xg
X = 5 g, answer
How much (in milliliters) of a 17% w/v concentrate of benzalkonium chloride should be used in preparing 300 mL of a stock solution such that 15 mL diluted to 1 L will yield a 1 : 5000 solution?
1 L = 1000 mL
1 : 5000 means 1 g of benzalkonium chloride in 5000 mL of solution.
X = 0.2 g of benzalkonium chloride in 1000 mL of diluted solution (1 : 5000), which is also the amount in 15 mL of the stronger (stock) solution to be prepared, because the amount of drug has not changed but simply been diluted.
X = 4 g of benzalkonium chloride.
A 17% w/v concentrate contains 17 g/100 mL. Therefore:
17 g = 100 mL 4g XmL
X = 23.5 mL, answer
5mL =0.5g 50mL Xg
X = 5 g, answer
Stock solutions contain a standardized concentration of the solute in a solution. To prepare 50 mL of solution with a ratio of 1:1000 solution, 5 gms of the drug will be required.
What is dilution?Dilution is the property of the solution with a less amount of solute concentration than the stock solution. A dilute solution is prepared by the addition of more solvent.
The addition of the solvent in a solution decreases the molar concentration which leads to dilution.
The ratio of 1:1000 means that 1 gm of the drug is present in 1000 mL (1L) of solution.
1000 mL = 1 gm × 500 mL × X gm
Here, the X represents the 0.5 gm of drug dissolved in 500 mL.
The amount of drug used is calculated as,
5 mL ÷ 50 ml = 0.5 g ÷ X g
X = 0.5 × 50 ÷ 5
= 5 gm
Therefore, 5 gm of the drug is required to prepare 50 mL of solution.
Learn more about dilution here:
https://brainly.com/question/27839179
#SPJ2
How often does the tip of and hour hand on a clock have the same velocity?
Answers
Answer:
Estoy triste, tuve que regalar a mi perro
HELPP! What is ammonium nitrates freezing point ?
Answers
Answer:
Freezing points for water with freezing mixtures based on salt and ice: Ammonium Nitrate - Chrushed Ice or Snow in Water 1 part Ammonium Nitrate - 0.94 parts Ice/water : temperature -4 o C 1 part Ammonium Nitrate - 1.20 parts Ice/water : temperature -14 o C
Explanation:
The metal rhenium becomes superconducting at temperatures below 1.4 K. Calculate the temperature at which rhenium becomes superconducting in degrees Celsius.
Answers
Answer:
The temperature at which rhenium becomes superconducting is -271.6 ºC.
Explanation:
We can convert the temperature given in Kelvin, which is an absolute scale, into degrees Celsius. which is a relative scale, by a simple algebraic translation, that is:
[tex]T_{C} = T_{K} - 273[/tex] (1)
Where:
[tex]T_{C}[/tex] - Temperature, measured in degrees Celsius.
[tex]T_{K}[/tex] - Temperature, measured in Kelvins.
If we know that [tex]T_{K} = 1.4\,K[/tex], then the temperature given in degrees Celsius is:
[tex]T_{C} = 1.4\,K-273[/tex]
[tex]T_{C} = -271.6\,^{\circ}C[/tex]
The temperature at which rhenium becomes superconducting is -271.6 ºC.
7.
Use the reaction below for the reaction of dicyanoacetylene with
ozone to produce carbon monoxide and nitrogen.
3C4N2(8) + 403(g) → 1200(8) + 3N2(g).
What volume of CO is produced when 1.20 L of C4N2 reacts?
a 0.300 L CO
b 3.60 L CO
C 14.4 L CO
d 4.80 L CO
Answers
Answer:
D
Explanation:
The volume of carbon monoxide is produced when 1.20 L of dicyanoacetylene reacts is
What is stoichiometry?Stoichiometry of any reaction tells about rhe relative amount of substance present before and after the completion of any chemical reaction.
Given balanced chemical reaction between dicyanoacetylene and ozone to produce carbon monoxide and nitrogen is:
3C₄N₂ + 4O₃ → 12CO + 3N₂
From the stoichiometry of the reaction it is clear that:
3 liters of C₄N₂ = produces 12 liters of CO
1.20 liters of C₄N₂ = produces 12/3×1.20=4.8 liters of CO
Hence option (d) is correct i.e. 4.8 liters.
To know more about stoichiometry, visit the below link:
https://brainly.com/question/16060199
An increase in aurora activity on Earth could be related to what activity on the Sun?
O A decrease in prominence
B decrease in solar Fares
Oc decrease in speed of solar wind
D increase in speed of solar wind
E increase in sun spots
Answers
Answer:
D.
Explanation:
INCREASE OF SOLAR WINDS When the sun is more active
what type of reaction is AsCl+H2S --> As2S3+HCl
Answers
Answer:
Double replacement:
Explanation:
Chemical equation:
2AsCl + 3H₂S → As₂S₃ + 6HCl
The given reaction is double displacement reaction. In this reaction arsenic trichloride and hydrogen sulfide react and produced arsenic sulfide and hydrogen chloride. In double displacement reaction both anion an cation of reactants are exchanged with each other.
Double replacement:
It is the reaction in which two compound exchange their ions and form new compounds.
General equation:
AB + CD → AD +CB
What is the measure of the amount of dissolved salts in ocean water?
Answers
Answer:
Salinity
HOPE THIS HELPS! :)
Explanation:
