4 years ago

Physical science 6.06 part one

Chemistry

1 answer:

Marysya12 [62]4 years ago

6 0

Answer:2 for 5, 6 for7

Explanation:

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Organic chemistry is the study of chemicals that no contain carbon true or false

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False
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4 years ago

A student wants to prepare a solution of cobalt(II) fluoride with a known molarity.

swat32

Answer:

$\large \boxed{\text{1.52 g}}$

Explanation:

1. Calculate the moles of CoF₂ needed

$n = \text{0.100 L} \times \dfrac{\text{0.157 mol}}{\text{1 L}} = \text{0.0157 mol}$

2. Calculate the mass of CoF₂

$m = \text{0.0157 mol} \times \dfrac{\text{96.93 g}}{\text{1 mol}} = \text{1.52 g}\\\\\text{ The student must measure out $\large \boxed{\textbf{1.52 g}}$ of cobalt(II) fluoride}$

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3 years ago

According to the kinetic molecular theory, which statement describes the particles in a sample of an ideal gas?

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Answer:

The motion of the gas particles is random and in a straight-line. A sample of gas is contained in a closed rigid cylinder.

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3 years ago

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3 years ago

Read 2 more answers

The formula weight of potassium dichromate (k2cr2o7) is __________ amu.

Gre4nikov [31]

The given compound is $K_{2}Cr_{2}O_{7}$

Each formula unit of $K_{2}Cr_{2}O_{7}$ has 2 mol Potassium (K) atoms, 2 mol Chromium (Cr) atoms and 7 mol Oxygen (O) atoms.

Atomic weight of potassium is 39.0983 amu

Atomic weight of Chromium is 51.9961 amu

Atomic weight of Oxygen is 15.9994 amu.

Therefore the formula weight of $K_{2}Cr_{2}O_{7} =$

$2 * 39.0983 amu + 2 * 51.9961 amu + 7 * 15.9994 amu$

= 294.1846 amu

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4 years ago