CHEMISTRY HIGH SCHOOL

Which substance can not be broken down by a chemical change?A) methane B) propanal C) tungsten D) water

Answers

Answer 1
Answer:

Answer:

The Answer is ELEMENT

Explanation:
Answer 2
Answer: okay the answer to your question is Tungsten

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How can I get the 3 sig figs of this number 187515.4207

Answers

Answer:

1.88 x 10^5

Explanation:

You have to round because all of the numbers in 187515.4207 are significant

Round to: 188000

Put in scientific notation:

1.88 x 10^5

Answer:

well scientific notation would be = 1.875154207 × 10^5

you cant rlly simply the number any further to get 3 sig figs

youd need something like 187 to be 3 sig figs

are you saying the question correctly?

Is melting ice an endothermic or exothermic? its a big class discussion in chemistry and the teacher won't tell us until the whole class agrees

Answers

It is an Endothermic because the ice cube is absorbing the heat making the ice cube melt. It can not be Endothermic because it is not releasing any heat it is melting.

Hydrochloric acid (HCl) is combined with cesium hydroxide (CsOH) in a neutralization reaction. Which ions will combine to form a salt? Check all that apply.H+
H3O+
Cl-
Cs+
OH-

Answers

HCl + CsOH --> CsCl + H2O

So the ions making up the salt: Cl- and Cs+

Answer:

The answers are C and D

Explanation:

Which bond pair does not have a polar covalent bond?A. P – Cl



B. O – H



C. S – Cl



D. H – Cl



E. Cl – Cl

Answers

The answer is E. Cl -- Cl

Chloride, Cl2, has a non-polar covalent bond because both molecules making up the compound are identical. This results to a diatomic molecule, which are known non-polar molecules. Since both sides of the bond are also the same, there is equal sharing of electrons. Polar covalent bonds are those that have unequal sharing of electrons.

Which molecule contains the smallest number of hydrogen atoms?

Answers

The Molecule that contain the smallest number of Hydrogen atoms is Al(OH)3. It has three hydrogen atoms -


I hopes this helps
 The molecule with a small amount of hydrogen atoms is a Al(OH)3.

What is the golden rule of solubility?

Answers

like disolves like is the golden rule
Like dissolves like I believe
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