80g of calcium reacts with water to form 114g of calcium hydroxide and 2g of
hydrogen.
2 Ca + 2 H0+2CaOH + H,
What mass of water was used in this reaction?​

Answers

Answer 1

Answer:

31g

Explanation:

80g(Ca)+m(H2O)=114g(CaOH)+2g(H2)

the total mass of the prodicts doesn't change throughout the process

80g+m(H20)=116g

m(H20)=31g


Related Questions

C₃ H8
What is the subscript for carbon in this molecule?

Answers

Answer:

3

Explanation:

Subscript basically tells you the number of element or ions present in a compound. In this case the subscript of carbon which is 3 denotes that only three carbon atoms is present in the compound.

How many grams of NH3 are needed to make 2.50 moles of (NH4)2SO4?
2 NH3(g) + H2SO4(aq) --> (NH4)2SO4(aq)

Answers

Answer:

85.155g NH3

Explanation:

C3Hg + 02 → CO2 + H2O
This chemical equation represents the combustion of propane. When correctly balanced, the coefficient for water
is
16.
2.
8.
4.

Answers

Answer:

4

Explanation:

The following equation, which depicts the combustion of propane, is given in this question as follows:

C3H8 + 02 → CO2 + H2O

However, this equation is not yet BALANCED because the number of atoms of each element is not the same on the reactant and product side. To balance the equation, we make use of COEFFICIENT to ensure that the number of atoms of each element on both side correlates.

The balanced equation is as follows:

C3H8 + 502 → 3CO2 + 4H2O

Therefore, the coefficient for water (H2O) after balancing the equation is 4.

The study of chemicals is called chemistry.

The correct answer is D.

The equation is not yet BALANCED because the number of atoms of each element is not the same on the reactant and product sides.

To balance the equation, we make use of COEFFICIENT to ensure that the number of atoms of each element on both sides correlates.

After balancing the equation is as follows:

[tex]C_3H_8 + 50_2 → 3CO_2 + 4H_2O[/tex]

Hence, the correct answer is 4 which shows the balanced water.

For more information, refer to the link:-

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What is the temperature change that 725 g of aluminum will undergo when 2.35 x 104
J of thermal energy are added to it?

Answers

Answer:

36°C

Explanation:

Given parameters:

Mass of aluminum = 725g

Quantity of heat  = 2.35 x 10⁴J

Unknown:

Temperature change  = ?

Solution:

To solve this problem, we simply use the expression below:

  The quantity of energy is given as:

          Q  = m C Δt

Q is the quantity of energy

m is the mass

C is the specific heat capacity of aluminum  = 0.9J/g°C

Δt is the change in temperature

  The unknown is Δt;

             Δt  = [tex]\frac{Q}{mc}[/tex]    = [tex]\frac{2.35 x 10^{4} }{725 x 0.9}[/tex]    = 36°C

Hydrazine, N2H4, and hydrogen, H2O2, have been used as rocket propellants. They react according to the equation:

H2O2 + N2H4 → N2 + H2O

a. How many moles of N2 are formed from 0.0250 moles of N2H4? (0.0250)

b. How many moles of H2O2 are required if 1.35 moles of H2O is to be produced? (0.675)

c. How many moles of H2O are formed if 1.87 moles of N2 is produced? (7.48)

Answers

Explanation:

The equation of the reaction is;

H2O2 + N2H4 → N2 + H2O

Upon balancing the reaction, we have;

N2H4 + 2H2O2 → N2 + 4H2O  

a. How many moles of N2 are formed from 0.0250 moles of N2H4?

From the equation of the reaction;

1 mol of N2H4 produces 1 mol of N2

0.0250 mol of N2H4 would produce x mol of N2

1 = 1

0.0250 = x

x = 0.0250 * 1 / 1 = 0.0250 mol

b. How many moles of H2O2 are required if 1.35 moles of H2O is to be produced?

From the equation of the reaction;

2 mol of H2O2 produces 4 mol of H2O

x mol of H2O2 produces 1.35 mol of H2O

2 = 4

x = 1.35

x = 1.35 * 2 / 4 = 0.675 mol

c. How many moles of H2O are formed if 1.87 moles of N2 is produced?

The relationship between H2O produced and N2 is;

For every 1 mol of N2 produced, 4 mol of H2O is produced

1.87 mol of N2 produced, how many moles of H2O is produced?

1 = 4

1.87 = x

x = 1.87 * 4 / 1 = 7.48 mol

Is water a reactant or product?

Answers

Answer: Reactant

Explanation:

In simple wording, Water act as a reactant and it broke or we can say split the larger molecule in the smaller ones, The H and OH bonds are attached to the two products that are formed after the reaction. Another process in which water is used as an important reactant is photosynthesis.

Why are some energy resources more expensive to use than others?

Answers

because they are more effective and reliable

Arrange the following atoms in order of increasing size (radius).
Te, S, Se
K, Br, Ni
Ba, Si, F

Answers

Answer:

S<Se<Te

Br<Ni<K

F<Si<Ba

Explanation:

Write the balanced chemical equations for the following double-replacement reactions.
(Steps: skeleton equation/count number of atoms in reactants and products/balance both sides)
Q24. Aqueous lithium iodide and aqueous silver nitrate react to produce solid sikrer iodide and
1 aqueous lithium nitrate.
A24.
I need the balanced chemical equation for this question

Answers

The balanced equation :

LiI(aq) + AgNO₃(aq) --> AgI(s) + LiNO₃(aq)

Further explanation

Given

Word equation

Required

Balanced equation

Solution

There are 3 ways to express a chemical equation:

word equation skeleton equation balanced equation

Skeleton equation for reaction above :

LiI(aq) + AgNO₃(aq) ⇒ AgI(s) + LiNO₃(aq)

If we look at this reaction, all the cations and anions have a charge of 1 (+1 or -1) so the balanced reaction between the skeleton equation and the balanced equation is the same

show how to work out...Calculate the mass in grams of 3.50 x 1025 atoms of lithium. Answer: 404g Li​

Answers

Take your number of atoms and divide by Avrogadros number, then multiply by molar mass of lithium to get your final answer

would using a strainer be filtration?

Answers

Answer:

To some extent, yes

Explanation:

In the laboratory you dissolve 12.7 g of silver fluoride in a volumetric flask and add water to a total volume of 125. mL. What is the molarity of the solution?​

Answers

Answer:

Molarity = 2.4 M

Explanation:

Given data:

Mass of silver fluoride = 12.7 g

Volume of water = 125 mL (125 mL× 1 L /1000 mL = 0.125 L)

Molarity of solution = ?

Solution:

Number of moles of silver fluoride:

Number of moles = mass/molar mass

Number of moles = 12.7 g/ 41.98 g/mol

Number of moles = 0.30 mol

Molarity:

Molarity = number of moles of solute / volume in L

Molarity = 0.30 mol / 0.125 L

Molarity = 2.4 M

Which ion forms the strongest ionic bond with a given anion? ​

Answers

Answer:

Explanation:

A cation with a 2+ charge will make a stronger ionic bond than a cation with a 1+ charge. A larger ion makes a weaker ionic bond because of the greater distance between its electrons and the nucleus of the oppositely charged ion.

how is carbon dioxide manufacture in the industry ​

Answers

Explanation:

While CO2 can be distilled from the air, that method is expensive and inefficient. Therefore, it is usually captured from other sources where it is a waste material. This could be anything from brewing beer to burning fossil fuels. However, the most efficient way of producing carbon dioxide is from ammonia.

Calculate the number of sucrose molecules in a 75.0 gram sample.

Answers

Answer:

1.32*10^23 molecules

Explanation:

sucrose formula: C12H22O11

molar mass: 12(12.01)+22(1.01)+11(16.00)=342.34g/mol

75.0 g C12H22O11 * (1 mol C12H22O11)/(342.34g C12H22O11)=0.219 mol C12H22O11

0.219 mol * (6.022*10^23)/mol = 1.32*10^23 molecules (three sig. figures)

The amount of force on an area is know as volume, acceleration, pressure, or momentum

Answers

Answer:

Pressure

Explanation:

Predictions about the future based on the position of planets is an example of physics biology earth science pseudoscience

Answers

Answer:

Pseudoscience

Explanation:

Predicting the future based solely on the position of the planets is an example of pseudoscience.

Pseudoscience is a body of knowledge that is not based on the scientific method but on some unverifiable/unprovable claims.

Predictions about the future can only be valid if it is based on the scientific method, not just about the position of the planet. The scientific method involves observation, hypothesis formulation, testing of the hypothesis through repeatable experiments, and arriving at conclusion.

Any other statement or belief that is not based on these procedures is said to be pseudoscientific.

Answer:

The answer to your question is pseudoscience.

Explanation:

I took the module 1 exam and got it right, yesterday.

The picture below is of oxygens bonded together. This forms a...

a) molecule
b) element
c) molecular compound
d) atom​

Answers

Answer:

Explanation:

The picture shows two similar structures bonded together so it can not be an atom or molecular compound .

It is a molecule . Each structure ( lobe ) represents atom of oxygen . Molecule of oxygen contains two atoms bonded together .

Molecule of oxygen = O₂ .

why do astronauts on the moon seem like they're "Walking on springs" while on earth we are firmly attached to the ground

Answers

Because of the moon's considerably lower gravity. The moon's gravity is about 1/4 as strong as the earth's gravity.
Our muscles a built to carry us on the earth. The astronauts are used to walking on earth so when they push forward with their legs they tend to use the same amount of energy which is 4 times more than needed. That push causes them to rise, Newton's second law

help PLZ will give brainliest

Answers

Answer:

6.Crust

7. outer core

8.mantle

what is rusting of iron?​

Answers

Answer:

Rusting is an oxidation reaction. The iron reacts with water and oxygen to form hydrated iron(III) oxide, which we see as rust. Unlike rust, which can flake off the surface of iron and steel objects, the layer of aluminium oxide does not flake off.

Explanation:

Rusting = oxidation reaction
Iron = reacts with oxygen and water to form hydrated iron oxide, we then start to see rust.
This prevents the metal from coming in any contact with air. Hope this helps :)

When a compound such as X2Z4 is created, what would be the
correct simplified chemical formula?

Answers

Answer:

XZ2

Explanation:

There are different ways in which compounds can be represented. Broadly, we have three different types of formula;

- Structural formular: This shows how th atoms in te compound are connected to each other.

- Molecular formular: This shows the actual number of atoms of element present in the compound

- Empirical Formular: This is the simplest formular of a compound. It basically shows the number of atoms in simple ration to each other.

This question requires us to input the empirical formular;

X2Z4

The ratio of the elements is; 2 : 4 which can be simplified into 1 : 2

This means the empirical formular is XZ2

Put the levels of organization in order from smallest to largest

Organism
Community
Ecosystem
Population

Answers

organism
population
community
ecosystem
organism
population
ecosystem
community

Which one of the following is a chemical property?
A. A wood block is less dense than water
B. Gold bar is shiny
C. Bubbles form when baking soda and vinegar are mixed.
D. Water turns from liquid to gas at 1000C.


pls help thx

Answers

The correct answer is C

The forming of bubbles when baking soda and vinegar are mixed is a result of chemical property.

Chemical Properties

Chemical properties of materials are properties that are due to the chemical composition of the materials.

The formation of bubbles when baking soda is mixed with vinegar is a result of the evolution of carbon dioxide gas.

Baking soda reacts with vinegar to produce carbon dioxide and other products according to the chemical equation below:

NaHCO3 + CH3COOH → CO2 + H2O + CH3COONa

More on chemical properties can be found here: https://brainly.com/question/1728902?referrer=searchResults

Low, gray, layered clouds that cover the sky and bring steady rain are O A. cumulus O B. cirrus O C. cumulonimbus OD. nimbostratus​

Answers

Answer:

D Nimbostratus

Explanation:

An object has a volume of 825 cm3 and a density of 13.6 g/cm3. Find its
mass

Answers

answer: 11,200 g

step by step explanation:

D= M/V
M= DV
M= (13.6 g/cm^3) (825cm^3)
M= 11,200 g

The mass of an object is the product of its volume and density. The mass of a the object with a volume of 825 cm³ and a density of 13.6 g/cm³ is 11220 g.

What is density ?

Density of substance is the measure of its mass per unit volume. It describes how closely its particles are packed. Density depends on the bond type, temperature and pressure.

Volume of the object is the space occupied by its particles. Volume can be expressed in L, ml, cm³, dm³ etc. Only solids and liquids has a definite volume and the volume of gases is that of the container.

Give that, volume of the object = 825  cm³

density =  13.6 g/cm³

Mass = volume × density

m = 825  cm³ ×  13.6 g/cm³ = 11220 g

Therefore, the mass of the object is 11220 g.

Find more on density:

https://brainly.com/question/15164682

#SPJ2

How many moles are present in 44.8 L of nitrogen gas (Na)?

Answers

Answer:

two moles

There are two moles.

Explanation:

The sucrose molecule is a large and complex molecule built of carbon, hydrogen, and oxygen. How many sucrose

molecules are in 0.5 moles of sucrose?

Answers

Answer:

There are 3.01x10²³ molecules of sucrose

Explanation:

In order to calculate the number of molecules of any atom or compound, we need to use the Avogadro number which is 6.02x10²³. This number could represent atoms or molecules of any mole of compound or atom.

In other words, 1 mole of a certain atom or compound has 6.02x10²³ molecules or atoms.

we have 0.5 moles of sucrose, all we just need to do is a simple rule of 3:

If 1 mole contains 6.02x10²³ molecules

then 0.5 moles will contain:

n° molecules = 0.5 * 6.02x10²³ / 1

n° molecules = 3.01x10²³ molecules of sucrose

Hope this helps

Water has a molar mass of 18.0 g/mol. How many particles of water do you drink if you drink 64 oz., or 1893 grams, of water in a day?

Answers

Answer:

[tex] \frac{1839}{18} = 102.16[/tex]

Take 102.16 and multiply by avogadros #

and you get 6.33 × 10^25 otherwise A

Answer:

Answer is A

Explanation:

I just took this.

3. A sample of neon gas has a volume of 1.2 L at 28.5°C. What will the volume be at 125°C it the
pressure remains constant?

Answers

Answer:

1.58L

Explanation:

Given parameters:

Initial volume  = 1.2L

Initial temperature  = 28.5°C  = 28.5 + 273  = 301.5K

Final temperature  = 125°C  = 125 + 273  = 398K

Unknown:

New volume  = ?

Solution:

Volume and temperature relationship is resolved using the Charles's law.

The law states that "the volume of a fixed mass of a gas varies directly as its absolute temperature if the the pressure is constant".

So;

       [tex]\frac{V1}{T1}[/tex]    = [tex]\frac{V2}{T2}[/tex]  

V1 is the initial volume

T1 is the initial temperature

V2 is the new volume

T2 is the new temperature

             [tex]\frac{1.2}{301.5}[/tex]    = [tex]\frac{V2}{398}[/tex]    

              301.5V2  = 477.6

                       V2  = 1.58L

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