True or false a compound is matter

Which statement best describes the function of an enzyme produced in the salivary glands in the mouth?

What are the features of erosion?

What is the molecular formula of a compound if its empirical formula is NO2 and its molar mass is 138.02 g/mole?

Why are heating vents usually placed on the floor of a home?

A catalyst will (A) alter the pathway (mechanism) of a chemical reaction. (B) increase ∆H for the reaction. (C) decrease ∆H for the reaction. (D) decrease Ea for the forward reaction only

When does a spring tide take place? At the beginning of spring Only during the spring season Only after spring is over At any time

The highest cloud are known as

What is the mass of 4.85 X 10^22 atoms of iron (Fe) ?

If element x has 95 protons how many electrons does it have

Which of the following when dissolved in deionized water would make a good conducting solution? a) methanolb) sugarc) baking soda