Which answer describes the measure of the amount of matter?

molar mass

stp

mole/s

kpa

Moles

Explanation:

Mole is used to describes the amount of matter. The one mole of every substance have different mass, because every matter has different mass. The one mole of substance is equal to the molar mass of that substance.

The molar mass of substance is the mass in gram in one mole and it is represented by g/mol.

For example:

The molar mass of oxygen is 16 g/mol. If we take 16 g of oxygen we would say we taken one mole of oxygen. If we take 32 g of oxygen than it is describe as two mole of oxygen.

Consider the following reaction:

2H₂  + O₂  → 2H₂O

In this reaction two mole of hydrogen gas combine with one mole of oxygen and produce two moles of water.

there is none because earth is stationary and flat.

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.