Two lab assistants measured a metal rod. One reported the measurement as 250 cm, and the other measured it as 250. cm. These measurements are equally precise.

True

False

Some solutes are able to pass directly through the lipid bilayer of a plasma membrane. T/F

What is a device that changes electrical energy into mechanical energy?

An acid-base indicator is used in what type of reaction?

What do you predict will happen to pH when an acid and a base are mixed together? Explain your prediction.

The heat flow due to the mass motion of a fluid or gas is accomplished by

The specific gravity of iron is 7.87, and the density of water at 4.00 ∘C is 1.00 g/cm3. You can use this information to find the density of iron. Find the volume occupied by 4.50 g of iron.

The volume of a gas is 93 ml when the temperature is 91? c. if the temperature is reduced to 0? c without changing the pressure, what is the new volume of the gas?

15.434 g of kcl (m. m 74.55 g/mol) is dissolved in water up t a total volume of 500.0 mL. the density of this solution is 1.02 g/mL. what is the concentration of he solution in molality

Determine the molar mass of an unknown monoprotic acid to two decimal places if 20.01 ml of a 0.098 m naoh solution were used to titrate 0.215 g of the unknown acid

A diatomic molecule with a triple covalent bond is A. H2 B. N2 C. O2 D. Br2 (P. S. The answer turned out to be B. N2)