An atom has a mass number of 9 and 5 neutrons. What is its atomic number?

What is a substance used to decrease the rate of a chemical reaction

Classify each of the following as a pure substance, a mechanical mixture, or a solution. Soil, Perfume, Baking powder, Glass cleaner.

Definition of inhibitor?

If samples of silver and lead each had volumes equal to 1 cm 3 which sample would have the greater mass?

For each of the 3 ionic compounds, select the main group element "X" belongs to ... a) X3PO4 b) CaX2 c) X2 (SO4) 3

The molar mass of magnesium (Mg) is 24.30 g/mol. There are 6.02 1023 atoms in 1 mol. How many atoms are present in 48.60 g of Mg? 3.32 10^-24 atoms 1.96 10^-21 atoms 1.20 10^24 atoms 7.11 10^26 atoms

Add 3.76 * 104 and 5.5 * 102 and write the answer in scientific notation. A. 9.26 * 104 B. 9.26 * 106 C. 3.82 * 106 D. 3.82 * 104

In a dynamic equilibrium between the liquid state and the gas state, what is true about the rate of evaporation? a. greater than rate of condensation b. less than rate of condensation c. equal to rate of condensation d. cannot be determined.

Which type of fault is under compression

Expressing concentrations in terms of molarity is especially convenient since it allows one to count chemical particles by measuring