3 years ago

A sound is created when matter vibrates A.True B.False

Chemistry

2 answers:

Fed [463]3 years ago

5 0

A. True but what is it?

BartSMP [9]3 years ago

4 0

It can be true because when you create a sound by hitting matter and it vibrates it does create a sound. So it's TRUE.

HOPE THIS HELPS!
HAVE A GR8 DAY ;-)

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what is an empirical formulaWhat is the percent composition by mass of nitrogen in (NH4)2CO3 (gram-formula mass = 96.0 g/mol)?

Margarita [4]

Answer:

Percentage composition = 14.583%

Explanation:

In chemistry, the emprical formular of a compound is the simplest formular a compound can have. It shows the simplest ratio in which the elements are combined in the compound.

Percentage composition by mass of Nitrogen

Nitrogen = 14g/mol

In one mole of the compound;

Mass of Nitrogen = 1 mol * 14g/mol = 14g

Mass of compound = 1 mol * 96.0 g/mol = 96

Percentage composition of Nitrogen = (Mass of Nitrogen / Mass of compound) * 100

percentage composition = 14/96 * 100

Percentage composition = 0.14583 * 100

Percentage composition = 14.583%

3 0

3 years ago

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