CHEMISTRY MIDDLE SCHOOL

1) What is the mass of 5.24 moles of Fe504-7H2O?

Answers

Answer 1

Answer:

Ok; first of all, you must correct the Molecular Formula; FeSO4•7H20

So, work out the Molar Mass;,

(4x18)O+ 55.? Iron + 32 Sulphur, PLUS

(7x 18) H2O = 1 molar mass.

Now, take that times 5.24, show your work & check the Mol. Weights, I am going by memory.

Oxygen

Explanation:

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A white powder is added to a solution. The images show observations made before the powder is added, just after the powder has been added, and a little while later. (The liquid in the small beaker is phenol red solution.) What evidence shows that a chemical change has taken place?

Answers

Change in colour as well as liberating gas are the evidences that chemical reaction or change taken place.

The change in colour of the solution provides us information or evidence is that chemical change has taken place. There are many other ways which provides evidence of taking place of chemical change is the release of gas from the solution after adding powder or any substance.

There are some reactions in which new substance is formed which is also an identification of chemical change so we can conclude that change in colour as well as liberating gas are the evidences that chemical reaction or change taken place.

Learn more: brainly.com/question/12017204

D.All of above. Hope it helps!!!

I will give brainliest!! Which branch of chemistry deals with the mass relationships of elements in compounds and the mass relationshops among reactants and products in chemical reactions?

a
quantitative analysis
b
entrophy
c
chemical kinetics
d
stoichiomentry

Answers

That would be D Stoichiometry.

Answer:

Explanation:

What best explains the type of energy present in the vibrating atoms of a substance

Answers

The type of energy present in the vibrating atoms of a substance is a thermal energy and it is a kinetic type of energy. It is associated with movement within the crystal lattice of substance. ... Eventually, it can lead to motion of the atoms which is a form of kinetic energy.

Why do you think there might not be enough fresh water in the future?

Answers

Answer:

hmhmhmhm

Explanation:

what might happen in a tropical rainforest biome if the area received very little rain for an extended period of time

Answers

plants and animals would die

Answer:

The forest will become very dry and things that need water will die

Where is the moon in its orbit at the time of a solar eclipse?

Answers

The moon is exactly on the line between the sun and the Earth, and the tip of its shadow falls somewhere on the Earth. People at that exact place can see the sun for a few minutes.

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