What does it mean when your teacher wants you to round 143 to two significant figures

Why does SO2 and water make H2SO3 and NOT H2SO4? Explain your answer.

Granite is a type of rock that forms deep underground from magma that cools very slowly. What type of rock is granite?

What are the units of measurement for molarity?

You measure the absorbency of a 0.5 ml solution and you find that it is 1.2. you then dilute this solution by adding 0.5 ml of pure water, making the final volume 1.0. what will be the absorbency of the diluted solution?

What is the mass in grams of 9.77*10^24 molecules of methanol (CH3OH) ?

Which two bases pair with each other?

What is the main cause of increased erosion

Where should you keep your glass of soda if you want it to remain fizzy

Why do the atoms in a piece of copper metal have no net charge? -The charges of the positive and negative copper ions cancel each other out. -The number of electrons surrounding each copper nucleus doesn't change.

In a closed system, the total heat given off by warmer substances equals the total heat energy gained by cooler substances (qwater = - qliquid).