What type of reacton is this? Ca + 2H2O = Ca (OH) 2 + H2

6) Table sugar can be separated from a mixture of table sugar and sand at STP by adding (1) sand, stirring, and distilling at 100.°C (2) sand, stirring, and filtering (3) water, stirring, and distilling at 100.00 (4) water, stirring, and filtering

Which of the following statements about noncovalent interactions are true? Charge-charge interactions (salt bridge, ionic bond) are electrostatic interactions between a pair of ions.

2. What are the characteristics of an acid (at least 3) ?

What's the molarity of a Sodium Hydroxide solution where 3.5 moles are dissolved in 3750 mL of solutions? 022M

If a thermometer is graduated in tenths of a degree, to which place should the temperature be measured? a. Tenths b. Tens c. Thousandths d. Ones e. Hundredths

How many molecules of sodium nitrate are produced when 17 g of sodium azide, NaN3, react according to the following equation: NaN3 (aq) + AgNO3 (aq) - --> AgN3 (s) + NaNO3 (aq) Question options: 3.7x1023 1.6 x 1023 1.85x1023 6.02x1023

Which statement is true for the given reaction? Zn + PbSO4

A student states the following: "Since acetone (nail polish remover) evaporate more readily than water, one would assume that acetone has weaker intermolecular forces than water." Evaluate their claim. (2 sentences)

A catalyst can only be used once. True False

On what basis do we distinguish between substances and separate them from one another?