In a laboratory experiment, John uses a mesh to separate soil particles from water. Which technique of separation is he using?

A.

chromatography

B.

distillation

C.

filtration

D.

condensation

Which two compounds are electrolytes A) KOH and CH3COOH B) KOH and C5H12 C) CH3OH and CH3COOH D) CH3OH and C5H12

What is the oxidation number of N in N2H4?

Which one of the following events occurs first in a nerve impulse? a. Potassium ions move to the outside of a neuron. b. Sodium ions move to the inside of a neuron. c. Potassium ions move to the inside of a neuron. d.

The reaction of glucose, c6h12o6, with oxygen produces carbon dioxide and water. what is the sum of the coefficients in the balanced equation?

The reaction a (g) + 2b (g) c (g) was allowed to come to equilibrium. the initial amounts of reactants placed into a 5.00 l vessel were 1.0 mol a and 1.8 mol b. after the reaction reached equilibrium, 1.0 mol of b was found.

A chemical reaction is carried out in a closed container. The energy absorbed by the chemical reaction is 50 kJ. What is the energy liberated from the air or the walls of the container? A) 50 kJ B) 75 kJ C) 25 kJ D) 100 kJ

Draw the electron-dot structure for chclo. draw the molecule by placing the atoms on the grid and connecting them with bonds. include all lone pairs of electrons.

At stp 5.6 liters of ch4 which element contains the same number of molecules?

Is a gas that is produced by the ultraviolet radiation in the air in the vicinity of welding operations?

At what the pressure, in atmospheres, that O2, gas at 75°C has a density of 2.00 g/L