Which of the following measurements is expressed in three significant figures?

A. 420 mL of hydrochloric acid

B. 0.003 g of vitamin D

C. 622.00 kg of sulfur

D. 0.201 L of nitrogen gas

Part complete the first-order reaction, 2 n2o (g) → 2 n2 (g) + o2 (g), has a rate constant equal to 0.76 s-1 at 1000 k. how long will it take for the concentration of n2o to decrease to 32 % of its initial concentration?

Is granite a liquid gas or solid at room temperature

What effect does adding a catalyst have for this reaction?

If a sexually reproducing organism has 28 chromosomes in its body cells how many chromosomes did it inherit from each parent

The table shows the recipe and the available ingredients for making the maximum possible number of sandwiches.

Trisha and her lab partner were conducting a variety of experiments to produce gases: hydrogen, oxygen, and carbon dioxide. In one experiment, they added a piece of magnesium ribbon to 10 milliliters of hydrochloric acid.

what mass of magnesium is required to react with excess nitrogen to produce 0.500 mol magnesium nitrade

Silver chromate is sparingly soluble in aqueous solutions. the ksp of ag2cro4 is 1.12 * 10-12 m3. what is the solubility (in mol/l) of silver chromate

What do you think 1,5-pentanedithiol C5H12S would smell like

If an atom has sp hybridization in a molecule: the maximum number of σ bonds that the atom can form is