How many moles of solute are contained in a 250.0ml solution with a concentration of 2.5m

Answer asap need it by wednesday morning calculate the ph of 0.02m hcl best answer will be brainliest

What causes different colors to appear in the sky? the absorption of light by air molecules the reflection of light by bodies of water the greenhouse effect in earth's atmosphere the scattering and reflection of light by dust particles

Suppose that some of the compound spilled out of the crucible after it was heated. would that cause the percent by mass of water in the compound determined by the experiment to be too low, too high, or unchanged? briefly explain your answer.