3 years ago

Can anyone help me out with these questions

Chemistry

1 answer:

Rus_ich [418]3 years ago

5 0

Answer:

2. B It is the outermost layer of Earth, composed of solid rock and divided into sections called plates. 3. B The inner core is kept solid by the intense pressure of all the layers above it.

Explanation:

You might be interested in

Most polyatomic ions are cations.<br> TRUE<br> FALSE

Ludmilka [50]

The answer is False.

6 0

3 years ago

A rock-climbing group reached the top of Mount Everest in the Himalayan mountains. Mount Everest is about 29,000 feet above sea

erastova [34]

Answer:

Explanation:

5 0

3 years ago

Read 2 more answers

The rows of the periodic table are called groups because similar elements reside next to each other on the modern periodic table

forsale [732]

Answer:

True

Explanation:

The vertical columns on the periodic table are called groups or families because of their similar chemical behavior. All the members of a family of elements have the same number of valence electrons and similar chemical properties. The horizontal rows on the periodic table are called periods.

3 0

3 years ago

Read 2 more answers

When 500 g of water is cooled from 80.0°C to 10.0°C, how much heat energy is lost?

vampirchik [111]

I don’t know

Explanation:

6 0

3 years ago

Read 2 more answers

An unknown liquid is composed of 34.31% c, 5.28% h, and 60.41% i. The molecular weight is 210.06 amu. What is the molecular form

ozzi

In an unknown liquid, the percentage composition with respect to carbon, hydrogen and iodine is 34.31%, 5.28% and 60.41% respectively.

Let the mass of liquid be 100 g thus, mass of carbon, hydrogen and oxygen will be 34.31 g, 5.28 g and 60.41 g respectively.

To calculate molecular formula of compound, convert mass into number of moles as follows:

$n=\frac{m}{M}$

Molar mass of carbon, hydrogen and iodine is 12 g/mol, 1 g/mol and 126.90 g/mol.

Taking the ratio:

$C:H:I=n_{C}:n_{H}:n_{I}$

Putting the values,

$C:H:I=\frac{34.31 g}{12 g/mol}:\frac{5.28 g}{1 g/mol}:\frac{60.41 g}{126.90 g/mol}=6:11:1$

Thus, molecular formula of compound will be $C_{6}H_{11}I$ .

4 0

3 years ago