CHEMISTRY MIDDLE SCHOOL

I need help on the questions above
I need help on the questions above - 1

Answers

Answer 1
Answer: i think its a molecule 

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Name a metal that doesn't conduct electricity

Answers

Well all metals conduct electricity in some way whether it's big or small, but probley one that wouldn't connect the most would be aluminum. 

Explain how following a fitness plan can help you meet a goal

Answers

because if you follow a fitness plan you can get done a lot of stuff that you can't without a plan so like you make a plan of what you are going to do instead of just doing random fitness stuff
If u follow a fitness plan it helps becuase it helps u be healthy and loose weight and junck food has bad stuff for ur body

This reaction is an explosive reaction of a strong acid combining with a strong base.H2SO4 + 2NaOH → 2H2O + Na2SO4

Which compounds are the reactants and which are the products?

A.
reactants: H2SO4 + 2NaOH
products: 2H2O + Na2SO4

B.
reactants: 2NaOH + Na2SO4
products: H2SO4 + 2H2O

C.
reactants: 2H2O + Na2SO4
products: H2SO4 + 2NaOH

D.
reactants: H2SO4 + 2H2O
products: 2NaOH + Na2SO4

Answers

A) reactants: H2SO4 + 2NaOH and products: 2H2O + Na2SO4
The reactants are found on the left side of the equation, before the arrow.
The products are found on the right side of the equation, after the arrow.

Answer:

A. Reactants: H2SO4 + 2NaOH

products: 2H2O + Na2SO4

Explanation:

HELP QUICK PLZ!!! What is the relationship between the structure of a substance and the properties of a substance? Explain.

Answers

Answer:

The bonding angle, the kind of bonds, the size of the molecule, and the interactions between molecules are all part of the chemical structure. Slight alterations in the chemical structure can have a significant impact on the compound's characteristics.

Explanation:
The bonding angle good luck

If you pump 40.088g of octane (C8H18) into your gas tank, how mant molecules of octane are you pumpingplease help ASAP will give the brainliest

Answers

Answer:

2.11 × 10²³ molecules of octane

Explanation:

Given data:

Mass of octane = 40.088 g

Molecules of octane = ?

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

For example,

18 g of water = 1 mole = 6.022 × 10²³ molecules of water

1.008 g of hydrogen = 1 mole = 6.022 × 10²³ atoms of hydrogen

Number of moles of octane:

Number of moles = mass/ molar mass

Number of moles = 40.088 g / 114.23 g/mol

Number of moles =  0.351 mol

Number of molecules:

one mole of octane = 6.022 × 10²³ molecules of octane

0.351 mole of octane = 0.351 ×  6.022 × 10²³ molecules of octane

2.11 × 10²³ molecules of octane

When elements combine to form compounds does there properties change?

Answers

Yes, they do. The process described is a chemical reaction and it implies the change of nature of reactants and, of course, the change of its properties.
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