Witch substance is a combination of different atoms

A - homogeneous mixture

B - heterogenous mixture

C - element

D - compound

What are the standard conditions under which reduction potentials are measured? O O O O 1°C and 1 M reactants 25°C and 1 M reactants 25°C and 2.5 M reactants 1°C and 25 M reactants

What's the definition of double replacement reaction

What is the ph value of water and salt?

A gas sample has a volume of 222 mL at 55.0 °C and 100.0 kPa pressure. Find the volume at 20.0 °C and 75.5 kPa.

Which of the following statements is true? Ca does not react with other atoms because it has 8 electrons in its outermost shell. Mg does not react with other atoms because its outermost shell is complete.

A student places three ice cubes in a beaker and allows them to partially melt. if she measures the temperature of the water in the beaker, what will she most likely observe? explain your answer.

What is the metric unit for density

Is the compound CO ionic or covalent

What is the volume in ml of one pound of mercury?

How does the number of molecules in one mole of carbon dioxide compare with the number of molecules in one mole of water? A. There are four times as many molecules in one mole of carbon dioxide as there are in one mole of water. B.