Disease causing bacteria need oxygen to survive.

true or false

Density is mass per I'm it of volume. Which pair of lab instruments would a student use to measure the density of a seawater

What factors influence the rate of reaction?

What happened to the glycerol formed during the saponification reaction?

Use the periodic table to find the molar mass of each element. molar mass H = g/mol molar mass S = g/mol molar mass O = g/mol DONE

Enter an equation for the precipitation reaction that occurs (if any) when solutions of potassium hydroxide and nickel (ii) bromide are mixed. express you answer as a chemical equation including phases.

Write the net ionic equation for the reaction between agno3 (aq) and na2so4 (aq). be sure to include states of matter in your answer.

Witch compound has an element ratio of 2:1

Consider the total ionic equation below. 2 upper N upper H subscript 4 superscript plus, plus 2 upper O upper H superscript minus, plus 2 upper H superscript plus, plus upper S upper O subscript 4 superscript 2 minus right arrow 2 upper N upper H

Which of the following is true regarding phase changes? A. Condensation is the reverse of evaporation. B. Melting is the reverse of deposition. C. Freezing is the same as sublimation. D. Sublimation is the same as boiling.

Which of the following adaptations to life on land is found in both insects and modern reptiles? A. metamorphosis from a larval form B. body surfaces that resist evaporation C. tracheae to distribute oxygen D. ability to fly E.