Which of the following is an oxide which is strongly acidic?
(a) Na2O.
(b) MgO
(c) SiO2.
(d) P2O5.

Answers

Answer 1

Answer:

answer of your question is 4th

Explanation:

P205


Related Questions

1. Necesitas un "cubo concentrado" (de esos que se usan para sazonar las comidas Maggie, ricostilla) dos vasos de vidrio o plástico y agua (caliente y fría). 2.Agrega al vaso con agua fria la mitad de un cubo concentrado y déjala reposar unos minutos. Prepara el segundo vaso con agua caliente y agrégale la otra mitad del cubo. 3. Argumenta tus observaciones en relación con lo observado y con la teoria vista. ¿Como influye la temperatura en este experimento?​

Answers

Respuesta:
El cubo Maggie es un sazonador que contiene caldo de pollo y grasas, por lo que se disuelve fácilmente al entrar en contacto con el agua caliente gracias a que la temperatura que derrite las grasas y se vuelven líquidas, mientras que con el agua fría no puede disolverse así de rápido ya que las grasas siguen en estado sólido.

The intermediate product formed during the production of urea is,

Answers

Answer:

Arginine is intermediate product formed during the production of urea

The key combination is ornithine, on which the urea molecule is 'created'; intermediates in the procedure contain citrulline and arginine.

What is the Production of Urea?

The urea cycle is a procedure of conversion of toxic ammonia to negligibly toxic urea. Consequences of the urea cycle are 1 molecule of urea, 2 molecules of ADP, and 1 molecule of both AMP and fumaric acid.

When Ammonia and carbon dioxide recovery During urea decomposition a mixture of gaseous carbon dioxide and also ammonia is accumulated and also immersed into a dilute aqueous urea resolution.

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Identifica las formas de energía mecánica
(cinética y potencial) que tienen lugar en diferentes puntos del movimiento en
un sistema mecánico (caída libre, montaña rusa, péndulo).

Answers

2 Tipos de Energía Mecánica

2.1 1. Energía hidráulica

2.2 2. Energía eólica

2.3 3. Energía Mareomotriz

3 Ejemplos de Energía Mecánica

3.1 1. Planta hidroeléctrica

3.2 2. Máquinas de Vapor

3.3  3. Motor de Combustión interna

3.4 4. Molinos de Viento

3.5  5. Un Juego de Billar

3.6  6. Motor eléctrico

3.7  7. Locomotora

3.8  8. Bala

3.9 9. Una pistola de Dardos

3.10 10. Pelota sobre una mesa

https://www.aura-energia.com/ejemplos-de-energia-mecanica/

What is the change in enthalpy of the first reaction below, given the enthalpies of the other two reactions?

Here's the reactions:

There was a formatting issue with the specific chemistry symbols, there all correct in the picture below

2C(s) + O2(g) → 2CO(g)


C(s) + O2(g) → CO2(g) ∆H0= -394 KJ/mol



CO(s) + 1/2 O2(g) → CO2(g) ∆H0= -283 KJ/mol


There was a formatting issue with the specific chemistry symbols, there all correct in the picture below

Answers

Answer:

∆H0 = -222kJ/mol

Explanation:

Using Hess's law, we can find the ΔH of a reaction from the sum of another related reactions as follows:

Using the reactions:

(1) C(s) + O2(g) → CO2(g) ∆H0= -394 KJ/mol

(2) CO(s) + 1/2 O2(g) → CO2(g) ∆H0= -283 KJ/mol

Twice (1):

2C(s) + 2O2(g) → 2CO2(g) ∆H0= 2*-394 KJ/mol = -788kJ/mol

The inverse reaction of (2):

-(2) CO2(g) → CO(g) + 1/2 O2(g) ∆H0= 283 KJ/mol

Twice this reaction:

2*-(2) 2CO2(g) → 2CO(s) + O2(g) ∆H0= 2*283 KJ/mol= 566kJ/mol

Now, the sum of 2*(1) - 2*(2) produce:

2C(s) + 2O2(g) + 2CO2(g)→ 2CO2(g) + 2CO(g) + O2(g) ∆H0= -788kJ/mol +  566kJ/mol

Subtracting the molecules that ar in both sides of the reaction:

2C(s) + O2(g) → 2CO(g) ∆H0 = -222kJ/mol

Cual es la longitud de onda de un foton emitido durante la transicion desde el stado n=5 al estado n=3 en atomo Hidrogeno? Dar como respuesta de la longitud de onda en nm (nanometros)

Answers

Answer:

1302 nm

Explanation:

Del formulario de Rydberg para longitud de onda

1 / λ = R (1 / nf ^ 2 - 1 / ni ^ 2)

1 / λ = 1.097 × 10 ^ 7 (1/3 ^ 2 - 1/5 ^ 2)

1 / λ = 1.097 × 10 ^ 7 (0.11 - 0.04)

1 / λ = 1.097 × 10 ^ 7 (0.07)

= 1,302 × 10 ^ -6 m

o 1302 nm

Name the following compound NiBr2?

Answers

Answer:

the Name of NiBr2 is

Nickel(II) bromide

Nickel(II) bromide | NiBr2 - PubChem.
Synonyms: Nickel(II) bromideNickel dibromideDibromonickelNickelous bromideNickel ...
Molecular Formula: NiBr2 or Br2Ni
PubChem CID: 278492

Using dobereiner's triads, what conclusion could have been made about magnesium

Answers

Answer:

Triads were groups of 3 elements with similar chemical and physical properties. Beryllium, magnesium, and calcium are all earth alkalis found in the earth

Explanation:

Describe how you would prepare a supersaturated solution

Answers

Answer:

A supersaturated solution contains more dissolved solute than required for preparing a saturated solution and can be prepared by heating a saturated solution, adding more solute, and then cooling it gently. Excess dissolved solute crystallizes by seeding supersaturated solution with a few crystals of the solute.

Explanation:

When a vacancy exists in an inner electron shell of an atom (as a result of photoelectric effect, Compton scattering, or bombardment by other electrons), the energy liberated when this vacancy is filled, instead of emerging from the atom as fluorescent radiation, can be transferred to another electron of the atom, thereby ejecting the electron. Such an emitted electron is called a(n) _____ electron

Answers

Answer:

The answer is "Auger".

Explanation:

The Auger effect is an effect size when the vacancy of even an atom throughout the inner shell was complemented by the release of even an electron from the same atom. Whenever a central electron is lost, a higher energy level electron can drop into the void and release energy, which can be the result.

Match each lab incident to the item of PPE that will protect you from it. Each item of PPE will only be used once.
While picking up a buret, an unknown solution left by a previous solution drips onto your hand._______________
While pulling an empty beaker off the shelf at the beginning of lab, it slips out of your hand onto the floor _______
While checking on a stirring solution, the solution splashes up towards your face. _______
While transferring a solution from a flask to a beaker, the solution accidentally spills down the front of the lab bench, __________
A. Gloves
B. Lab coat
C. Goggles
D. Closed-toe shoes

Answers

While picking up a buret, an unknown solution left by a previous solution drips onto your hand - Gloves

While pulling an empty beaker off the shelf at the beginning of lab, it slips out of your hand onto the floor - Closed-toe shoes

While checking on a stirring solution, the solution splashes up towards your face - Goggles

While transferring a solution from a flask to a beaker, the solution accidentally spills down the front of the lab bench - Lab coat

Explanation:

The full form of PPE is 'Personal Protective Equipment'.The PPE items we use in labs are : Lab coat: Protection of clothing and skin from accidental spilling of hot liquid or toxic substances. Gloves: Protection from hands from  chemicals, hot objects, sharp tools, or electricityGoggles: Protection of the eye from any chemicals, toxic vapor, chemical debrisFace shield:  Protection of the face from any chemicals, toxic vapor, chemical debrisClosed-toe shoes: Protection from feet from  chemicals, hot objects, sharp tools, or electricity

So, according to the question. the matches will be:

While picking up a buret, an unknown solution left by a previous solution drips onto your hand - Gloves

While pulling an empty beaker off the shelf at the beginning of lab, it slips out of your hand onto the floor - Closed-toe shoes

While checking on a stirring solution, the solution splashes up towards your face - Goggles

While transferring a solution from a flask to a beaker, the solution accidentally spills down the front of the lab bench - Lab coat

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Analysis of an ore of calcium shows that it contains 13.61 g calcium and 21.77 g oxygen in a 46.28-g sample. Calculate the percent composition of this compound.

Answers

Answer:

29.41% of Calcium and 47.04% of Oxygen

Explanation:

The percent composition of an atom in a molecule is defined as 100 times the ratio between the mass of the atom and the mass of the molecule.

The mass of the molecule of the problem (Ore) is 46.28g. That means the percent composition of Calcium is:

13.61g / 46.28g * 100 = 29.41% of Calcium

And percent composition of Oxygen is:

21.77g / 46.28g * 100 = 47.04% of Oxygen

For the reaction 2A + 4B ----> 2C + 2D, at a particular instant in time, the rate of the reaction is 0.0352 M/s. What is the rate of change of B? Show Work!

A. 0.0088 M/s
B. -0.0088 M/s
C. -0.141 M/s
D. -0.0352 M/s
E. 0.141 M/s

Answers

Explanation:

The given chemical equation is:

[tex]2A + 4B -> 2C + 2D[/tex]

The rate of the reaction is 0.0352 M/s.

During the course of the reaction, the rate of reactants decreases, and the rate of products increases.

The rate of disappearance of B is shown below:

[tex]rate=-\frac{1}{4} \frac{d[B]}{dt}[/tex]

So, rate of change of B is :

[tex]rate of change of B =- rate * 4\\=-0.0352 M/s * 4\\=-0.1408M/s\\\\=-0.141M/s[/tex]

Option C.

In the given reaction, rate of change of reactant B is equal to -0.141 M/s.

What is the rate of reaction?

Rate of any chemical reaction defines the speed of the completion of that reaction.

In the question given reaction is:

2A + 4B ----> 2C + 2D

Rate of reaction = 0.0352 M/s.

Rate of the reaction with respect to the reactant B is written as:

Rate = [tex]${\rm{ - }}\frac{{\rm{1}}}{{\rm{4}}}\frac{{\left[ {{\rm{dB}}} \right]}}{{{\rm{dT}}}}$[/tex], where negative sign shows the disappearance of reactant B.

Rate of change of B i.e. [tex]$\frac{{{\rm{dB}}}}{{{\rm{dT}}}}$[/tex] =  4 × (-rate)

[tex]$\frac{{{\rm{dB}}}}{{{\rm{dT}}}}$[/tex] =  4 × (-0.0352) = -0.1408 = -0.141 M/s

Hence, -0.141 M/s is the rate of change of B.

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A liquid that occupies a volume of 8.2L has a mass of 5.6kg. What is the density of the liquid in kg/L

Answers

Answer:

0.68

Explanation:

This is because the formula for finding density is mass/volume. Therefore the equation becomes 5.6/8.2 giving you 0.68

why water molecules remain associated in liquid water

Answers

Answer:

Answer: They are attracted to each other due to their electrostatic attraction. All that means is the hydrogen atom is positively charged, while the oxygen atom is negatively charged. ... The hydrogen of one water molecule will bond to the oxygen atom of another molecule.

Answer:

They are attracted to each other due to their electrostatic attraction. All that means is the hydrogen atom is positively charged, while the oxygen atom is negatively charged. ... The hydrogen of one water molecule will bond to the oxygen atom of another molecule.

Explanation:

Please hurry this is due tomorrow morning

A student is studying the ways different elements are similar to one another. Diagrams of
atoms from four different elements are shown below.

Which two atoms are of elements in the same group in the periodic table?

F Atom 1 and Atom 2
G Atom 1 and Atom 4
H Atom 2 and Atom 3
J Atom 3 and Atom 4

Answers

Answer: G Atom 1 and Atom 4.. hope this helps and good luck!

Which statement describes the "Law of Conservation of Mass" for the following reaction?
4 Fe + 302 -
2 Fe₂O₃
Select one:
tion
a.
grams of Fe + grams of Fe2O3 = grams of O2
O b. grams of O2 + grams of Fe2O3 = grams of Fe
O c. grams of Fe +grams of O2 = grams of Fe203
O d. None of these.
Name this ionic compound.

Answers

Answer:

c

Explanation:

how do i calculate the concentration of a certain solution​

Answers

Answer:

Divide the mass of the solute by the total volume of the solution. Write out the equation C = m/V, where m is the mass of the solute and V is the total volume of the solution. Plug in the values you found for the mass and volume, and divide them to find the concentration of your solution.

HELP ME ASAPPPP PLZZZZZ!!!!!
For the reaction C + 2H2 → CH4, how many grams of hydrogen are required to produce 16.8 moles of methane, CH4 ?

Answers

The answer is going to be 2.40g

can u plz solve it n send the answer​

Answers

1. Cl2 + H2O → HOCl + HCl

2. Tooth decay starts when when the pH of the mouth is lower than 5.5. Tooth enamel is made up of calcium phosphate and it is one of the hardest substances of the body. But it is corroded when the pH is less than 5.5. The bacteria of our mouth produce acids by degradation of sugar and food particles remaining in our mouth after eating food.

3. Fluorine salts are added in toothpaste to protect our teeth from tooth decay. Fluorine salts are mildly basic, so they neutrelise the acid in our mouth that leads to tooth decay.

4. Tincture of iodine is iodine, pottasium iodide and sodium iodide dissolved in ethanol. Iodine acts in an antiseptic manner by destroying microbial proteins and DNA.

5. Tincture of iodine is clear and reddish brown liquid.

Brainliest if answered correctly
How many Calcium (CA) atoms are in carbon tetrachloride​

Answers

Answer:

What atoms are present in carbon tetrachloride?

There is 1 carbon, and 4 chlorine atoms (or chloride ions if you want to get technical). Tetra means 4 in Greek.

hope that helps❤

Answer:

there are no calcium atoms of n carbon tetrachloride

Name five metal which are both dilute and memorable? class 10​

Answers

Iron, magnesium, zinc, aluminum. I don’t know of any others

Which is the formula mass of (NH4)2SO4?
96.07 amu
114.12 amu
116.17 amu
132.17 amu

Answers

Answer:

132.17amu

Explanation:

(14.01+1.01 multiplied by 4)=18.05×2=36.1

36.1+32.07= 68.17

16.00×4=64

68.17+64=132.17

Answer:

132.17 amu

Explanation:

just took the test. got 100


BJECTIVE TYPE QUESTIONS
Fill in the blank spaces by choosing the correct words from the words given in list.
List : composition, heat, chemical, photosynthesis, physical
1. Heating of zinc oxide is a
change.
2. Burning of coal is a
change.
3. There is a change in state and
during a chemical change.
4. Plants make their food by the process of
5.
energy is generally given out or absorbed during a chemical change​

Answers

Answer:

1.Physical change

2. Chemical change

3. Heat

4.photosynthesis

5. composition

2. Nitric oxide contains 46.66% nitrogen and 53.34% oxygen. Water contains 11.21% hydrogen and 88.79% oxygen. Ammonia contains 17.78% hydroger and 82.22% nitrogen. Use these data to verify the law of reciprocal proportions. ​

Answers

Answer:

The law of reciprocal proportions states that if two elements react individually with a given weight of a third element, the ratio of the masses with which they combine with the third element are either the same or a simple multiple of the ratio of the masses with which they combine with each other

The compounds formed includes;

1) Nitric oxide, NO

Nitrogen = 46.66% × 30.01 = 14

Oxygen = 53.34% × 30.01 = 16

2) Water, H₂O

Hydrogen = 11.21% × 18.01528 = 2

Oxygen = 88.79% × 18.01528 ≈ 16

3) Ammonia, NH₃

Hydrogen = 17.78% × 17.031 ≈ 3

Nitrogen = 82.22% × 17.031 ≈ 14

The ratio of nitrogen to oxygen in nitric oxide = 14:16 = 7:8

The ratio of nitrogen to hydrogen in ammonia = 14:3

The ratio in which hydrogen and oxygen combine with nitrogen = 3/16

The ratio of hydrogen and oxygen combine with each other in water = 2/16

Therefore, the ratio with which hydrogen and oxygen combine with nitrogen, is (2/3) times the ratio with which they combine with each other, which verifies the law of reciprocal proportions

Explanation:

calculate the mass of magnesium needed to make 25g of magnesium oxide​

mark brainliest of correct xx

Answers

Answer:

15g

Explanation:

First, you need to correct the answer to the previous question. The percentage by mass of Mg in MgO =

Mg = 24.3 amu

O = 16.0 amu

The total mass of MgO = 40.3 amu

To calculate the percent composition of Mg:

% = 24.3/40.3 x 100

% = 60

To calculate the mass of Mg needed to make 25g of MgO:

x/25g = 60%/100%

100x = (25)(60)

100x = 1500

x = 15g

Which of the following processes does NOT facilitate containment?

Answers

Answer:

b is the answr

Explanation:

The correct answer is Option (B) Enrichment of Uranium-235 is done.

What is Containment? Containment is the process of preventing pollution or contamination of the immediate site environment by dust, chemicals, and other materials to prevent corrosion.

What is Corrosion?Corrosion is a natural process that converts a refined metal into a more chemically stable oxide.The degree of containment  is directly proportional to the degree of toxicity present in the corrosion preventive substance being applied.

Why other options are incorrect?Option (A) , (C) , (D) are the options that facilitate containment because these are the processes for preventing contamination.

Hence Option (B) is correct because enrichment of uranium-235 is achieved by the process of conversion So , It does not facilitate containment

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It's said that not all electrons in an atom have the same amount of energy. Is it the same for protons? Because if it's not then how come they have the same atomic number at the end?

Answers

Answer:

When an atom has an equal number of electrons and protons, it has an equal number of negative electric charges (the electrons) and positive electric charges (the protons). The total electric charge of the atom is therefore zero and the atom is said to be neutral.

I HOPE THIS HELPS !!!!!!!!!!!

A galaxy that has an undefined shape is best classified as a(n)
galaxy.

Answers

Answer:

irregular galaxy

pls give brainliest :)

Answer:

irregular galaxy

it is undefined shape

The graph shows the change in concentration of one of the species in the reaction
A + B + C→D.

If the graph indicates the reaction rate, then the concentration of which species is plotted?

A

B

C

D

Answers

Answer:

its D

Explanation:

Took the test

The specie whose concentration is plotted is D. The rate of reaction is how quickly or slowly hat a reaction proceeds.

Rate of  reaction

The term rate of reaction refers to how quickly or slowly hat a reaction proceeds. A reaction rate plot involves the concentration of the species plotted against time.

Now we can see from the plot that concentration is increasing with time. Since the concentration of products increases with time, then the specie whose concentration is plotted is D.

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Answer in detail?? What precautions would you take to protect yourself from an earthquake, when you are at home and when you are outdoors?

Answers

Answer:

If you're indoors, stay inside. If you're outside, stay outside. If you're indoors, stand against a wall near the center of the building, stand in a doorway, or crawl under heavy furniture (a desk or table). Stay away from windows and outside doors.

Answer

Protect your head and neck with a large book, a pillow, or your arms. The goal is to prevent injuries from falling down or from objects that might fall or be thrown at you.If you are able, seek shelter under a sturdy table or desk. Stay away from outer walls, windows, fireplaces, and hanging objects.If you are unable to move from a bed or chair, protect yourself from falling objects by covering up with blankets and pillows.If you are outside, go to an open area away from trees, telephone poles, and buildings, and stay there.
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People began to have a more personal and emotional religious experience, as well as questioning the authority of the church during the _______________MayflowerNew Amsterdam Great awakening Bacons Bebellion which of the following are human activities that can negatively impact ecosystems. Pls help .ZZZZZZZZA 2. . Complete the following past simple and continuous events. Choose the correct alternative (10 points)1. Sylvia _____________ when she ___________ the DVDs.a) was running / droppedb) ran / droppedc) was running / was droppingd) ran / was dropping 2. While Steve ___________ a documentary, he __________ asleep.a) was watched / fellb) was watching / fellc) watched / was fallingd) was watching / felt3. They _________ when you _________ for remote control.a) aren't listening / were askingb) weren't listening / were askingc) weren't listening / askedd) listened / asked How many meters are in 10 miles? use the formula v=u+at to find the velocity when the initial velocity is 3m/s2 the time is 7 seconds 1.2 m1.2 mSusie is 1.13 metres tallShe has a play tent in the shape of a triangular prism.The diagram shows the front view of the tent.The front of the tent has been drawn to scale below.a) Complete the scale drawing.1.5mNot drawn accuratelyb) Can Susie stand up in themiddle of the tent?1.5mScale: 1 cm represents 60 cm What are the common factors of 24 and 60 J00Sugar(C2H2011)260KNO220180Solubility (g solute per 100 g H,0)140NaNO,NaBr100KBr60Naci200020Ce (50)40 60Temperature (C)80100Which compound would make a saturated solution if 98 grams weredissolved in 100 grams of solution at 80 degrees Celsius?O KBrO SugarOKCIO NaClalish Which of the following is not a purpose of a nonfiction text?A. Entertain by satirizing a political candidateB. Inform a consumer about the nutrition of a productC. Create a fantasy worldD. Persuade someone to change their opinion about school uniforms A cube has a volume of 64 cubic inches what's the length of one side of the cube Which ordered pair is the best estimate for the solution of this system of linear equations? A.(-6, -2) B.(-3, 2) C. (4,-4) D. (6,8) A 2.0 kg puck is at rest on a level table. It is pushed straight north with a constant force of 5N for 1.50 s and then let go. How far does the puck move from rest in 2.25 s? 4. Join the pairs of sentences with the connectives given in the bracket:a. I like dancing. My father doesn't like dancing. (but) ji and jl are opposite rays Select All the correct answersSelect all the statements that are true for the following systems of equations.System A2x-3y=44x.y = 18System B3x - 4y 5y = 5x + 3System C2x-3y - 412x-3y 541. All three systems have different solutions.2. Systems A and B have different solutions3. Systems A and C have the same solution4. Systems B and C have the same solution5. System C simplifies to 2x - 3y = 4 and 4x - y = 18 by dividing the second equation by three What is the head start theorem and why might it not work as well as Kenneth Arrow believed? The amoeba excretes waste through _________ while a sparrow excretes waste through __________. What is the molecular geometry of a molecule made of two atoms that share one pair of electrons and have no lone electrons pairs?trigonal pyramidallineartrigonal planarbent Which statement best describes the trait of being tactful?A- Ability to be humble in every situationB- Ability to remain stress freeC- Ability to deal with others, especially in difficult situations D- Ability to comply with given instructions (Wrong answer)E- Ability to arrive at work on time