Ask question

Ask question

All categories

3 years ago

8

What are compounds?

1 answer:

hodyreva [135]3 years ago

8 0

I think the correct answer is option A. Pure substances can be considered as compounds. Compounds are molecules made of atoms from different elements held together by chemical bonds. Pure substances are these compounds that exist alone no other substance.

You might be interested in

This is the energy that all moving objects have. 1.

Delvig [45]

Every moving object has kinetic energy.
Kinetic energy is an energy possessed by an object in motion

4 0

3 years ago

3. A sample of carbon has a mass of

Sav [38]

$- 34 {}^{15}$

The power of -34 will be 15 because 15 zeroes are given....

8 0

3 years ago

a solution must be at a higher temperature than a pure solvent to boil. what colligative property can be employed to achieve thi

Kazeer [188]

Boiling-point elavation.

6 0

3 years ago

Read 2 more answers

If you are using 3.00% (mass/mass) hydrogen peroxide solution and you determine that the mass of solution required to reach the

Maurinko [17]

Answer:

0.004522 moles of hydrogen peroxide molecules are present.

Explanation:

Mass by mass percentage of hydrogen peroxide solution = w/w% = 3%

Mass of the solution , m= 5.125 g

Mass of the hydrogen peroxide = x

$w/w\% = \frac{x}{m}\times 100$

$3\%=\frac{x}{5.125 g}\times 100$

$x=\frac{3\times 5.125 g}{100}=0.15375 g$

Mass of hydregn pervade in the solution = 0.15375 g

Moles of hydregn pervade in the solution :

$=\fraC{ 0.15375 g}{34 g/mol}=0.004522 mol$

0.004522 moles of hydrogen peroxide molecules are present.

5 0

3 years ago

when copper is bombarded with high energy electron x rays are emitted.Calculate the energy(in joule) associated with photons if

kakasveta [241]

The answer that i got was three
i redid it and got some answer like 4.62 x1014<span> Hz</span>

3 0

3 years ago