Which of the following cannot be classified as a substance? gold table salt nitrogen air Description

The chemical formula for the compound strontium sulfide, which contains Sr2 + and S2 - ions, is

Which part of an of the helium atom is positively charged

Which of the following statements about acidic water is true? a. Acid has no effect on the H, O molecules. b. The solution contains a larger number of OH ions than H, O ions. c. The solution contains a larger number of H, O ions than QH ions. d.

The steps of the scientific method must be followed in order every time an experiment is carried out. Question 20 options: True False

In the following reactions first Identify the substance that is oxidized and the one that is reduced. Then identify the oxidizing and reducing agents. A. 2Li (s) + F2 (g) - - > 2LiF (s) B. Fe (s) + CuSO4 (aq) - - > FeSO4 (aq) + Cu (s)

Was the relationship among temperature, heat, and thermal energy?

What will most likely happen when a warmer air mass exists above a polar ice sheet? The temperature of the ice sheet will be lowered. Heat will be transferred from the air mass to the ice. The air mass will exert high pressure and rise upwards.

A 2.00 L sample of gas at 35 C is to be heated at constant pressure until it reaches a volume of 5.25 L. To what Kelvin temperature must this sample be heated?

Of the following reactions, which one produces oxygen gas? Fermentation Anaerobic respiration Aerobic respiration Photosynthesis

Describe the electrodes in this iron-copper galvanic cell.