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3 years ago

Please check if i did it right. did i put the right electric charge

Chemistry

1 answer:

Ad libitum [116K]3 years ago

6 0

Your protons are correct but it’s 28 neutrons not 27!

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How do you convert moles of a compound to mass?

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Answer:

Divide the mass of the compound in grams by the molar mass you just calculated. The answer is the number of moles of that mass of compound

Explanation:

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3 years ago

Which of the following statements best describes a difference between mechanical waves and electromagnetic waves?

kipiarov [429]

The correct answer is the 3rd one

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3 years ago

How to classify hemicetal and acetal

kumpel [21]

You might have meant hemiacetal, not hemicetal.
Acetals contain two –OR groups, one –R group and a –H atom. In hemiacetals, one of the –OR groups in acetals is replaced by a –OH group<span>.
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3 years ago

A 1.25 g gas sample occupies 663 ml at 25∘ c and 1.00 atm. what is the molar mass of the gas?

lakkis [162]

Using ideal gas equation,

$P\times V=n\times R\times T$

Here,

P denotes pressure

V denotes volume

n denotes number of moles of gas

R denotes gas constant

T denotes temperature

The values at STP will be:

P=1 atm

T=25 C+273 K =298.15K

V=663 ml=0.663L

R=0.0821 atm L mol ⁻¹

Mass of gas given=1.25 g g

Molar mass of gas given=?

$Number of moles of gas, n= \frac{Given mass of the gas}{Molar mass of the gas}$

$Number of moles of gas, n= \frac{1.25}{Molar mass of the gas}$

Putting all the values in the above equation,

$1\times 0.663=\frac{1.25}{Molar mass of the gas}\times 0.0821\times 298.15$

Molar mass of the gas=46.15

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3 years ago

Which statement best describes the model that shows a compound?

VashaNatasha [74]

B is the.answer for this problem

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3 years ago

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