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weeeeeb [17]
4 years ago
7

Petra and huh are doing a class demonstration to show that solids, liquids, and gases all have mass. They use a balance for soli

ds and liquids, but they are having trouble measuring the mass of gases. Which is the best way for them to show that air has mass?
A. Compare the masses of an airfield balloon in an empty balloon.
B. Use a fan to make a current of air And measure it.
C. Put an empty bottle on one side and a full bottle on the other.
D. Heat water to show is changing from liquid to water vapor.
Chemistry
1 answer:
Ksivusya [100]4 years ago
3 0
Pick choice B that’s correct
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4 years ago
_____ are chemical substances that bind with a receptor and activate the receptor, much like a neurotransmitter does.
Viefleur [7K]

Answer:

Ligands

Explanation:

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an engineering team is conducting a trial launch of a few rocket . which part is the engineering process is the team in ?
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7 0
3 years ago
1. How many molecules are in 240g of sulfuric acid?
Soloha48 [4]

Answer:

14.8 × 10²³ molecules

Explanation:

Given data:

Mass of sulfuric acid = 240 g

Number of molecules = ?

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 sulfuric acid

<em>Number of moles = mass/ molar mass</em>

Number of moles =  240 g/ 98 g/mol

Number of moles = 2.45 mol

Number of molecules:

1 mole = 6.022 × 10²³ molecules

2.45 × 6.022 × 10²³ molecules

14.8 × 10²³ molecules

3 0
3 years ago
Which statement is true?
algol [13]

The statement that is true is that B. Atoms always remain intact during chemical reactions.

Atoms simply mean the <u>basic units of matter.</u> They're the defining structure of an element. Atom is also known as the smallest unit of matter.

It should be noted that atoms always remain intact during chemical reactions. They cannot be added and removed when there are <em>chemical reactions.</em>

Read related link on:

brainly.com/question/19338615

3 0
3 years ago
Read 2 more answers
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