How many moles are in 25 grams of HF

What state are each of these chemicals in iron steam diamond mercury?

Why don't rockets need air to stay up, like planes do?

Students want to separate and compare the components of black ink and green ink. which technique is the best for the students to use?

If ATP is hydrolyzed in a test tube, which of the following effects indicates that the reaction is exergonic? A) Release of energy drops the temperature in the test tube. B) Release of energy has no effect on the surroundings.

Is popping popcorn a physical or chemical change? Explain your answers.

If you made 6 moles of NO2 How many grams of N2 did you use N2+2O2> 2NO2

At what temperature in Kelvin will 0.0965 moles of chlorine exert a pressure of 2.02 atm at a volume of 0.652 L?

How can a mixture of nails and sawdust be most efficiently separated into its component parts? A:By cooling it B:By filtering it C: By using a magnet D:By using a catalyst

A 10.0 L balloon contains helium gas at a pressure of 655 mmHg. What is the new pressure, in mm Hg, of the helium gas if the volume is 20.0 L and if there is no change in temperature or quantity? 6550 mmHg 1000 mm Hg 1310 mmHg 300 mm Hg

Restate Newtons first law in terms of acceleration