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3 years ago

Chemistry is not my subject please help

Chemistry

1 answer:

Dafna1 [17]3 years ago

3 0

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Chemical formula is H2O2

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3 years ago

How do you rank the states of matter from highest to lowest in kinetic energy

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Plasma, Gas, Water, Solid

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4 years ago

The empirical formula of a compound is CH2O and its molecular weight is 90.09 g/mol. Determine the molecular formula.

Pachacha [2.7K]

Answer : The molecular formula of the compound will be, $C_{3}H_{6}O_3$

Explanation :

Empirical formula : It is the simplest form of the chemical formula which depicts the whole number of atoms of each element present in the compound.

Molecular formula : it is the chemical formula which depicts the actual number of atoms of each element present in the compound.

For determining the molecular formula, we need to determine the valency which is multiplied by each element to get the molecular formula.

The equation used to calculate the valency is :

$n=\frac{\text{molecular mass}}{\text{empirical mass}}$

As we are given that the empirical formula of a compound is $CH_2O$ and the molar mass of compound is, 90.09 gram/mol.

The empirical mass of $CH_2O$ = 1(12) + 2(1) + 1(16) = 30 g/eq

$n=\frac{\text{molecular mass}}{\text{empirical mass}}$

$n=\frac{90.09}{30}=3$

Molecular formula = $(CH_2O)_n=(CH_2O)_3=C_{3}H_{6}O_3$

Thus, the molecular formula of the compound will be, $C_{3}H_{6}O_3$

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4 years ago

Write true or false next to each of these statements.

Serggg [28]

Answer:

a) False ( all metals are not magnetic for ex - gold is not magnetic )

b) false ( Diamond is a solid non metal still it shine)

c ) False ( mercury metal is liquid at room temperature)

d) True

e) False (Non metals are bad conductor of heat and electricity )

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3 years ago

Why does the magnitude and direction of the inertial force on the body is always zero for a freely falling body

svlad2 [7]

Answer:

Because his first law states that an object with a net force of zero acting on it will remain at rest, if initially at rest, or it will maintain a constant velocity.

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3 years ago