Students in a science classroom were given two vials. One vial contained a mixture and the other vial contained a pure substance. What is the main difference between a mixture and a pure substance.

What specific type of organisms perform cellular respiration?

Will a precipitate of AgCl form when 0.050 mol NaCl and 0.050 mol AgNO3 are dissolved in 500 ml of 3.0 M NH3

When vinegar was combined with baking soda and sealed in a plastic quart bag, the total mass of the products was 70 g. What was the total mass of the vinegar and baking soda before the reaction took place? A. 0 g B. 35 g C. 70 g D. 140 g

We can see that stars do not appear randomly on the plot but appear to be grouped in four main regions. Most stars seem to fall into group A.

Space shuttle engines combine liquid hydrogen and liquid oxygen to produce an explosive reaction which releases great amounts of energy. A positive feature of this reaction is that no pollutants are produced, as they are in hydrocarbon combustions.

What is accuracy? The same as precision It refers to how closely individual measurements agree with each other. It referes to how closely a measured value agrees with the correct value. It increases with the number of measurements.

If we know that 10.0 cm3 of ice has a mass of 9.19 g what is the density of ice

If the pressure of 125 l of gas is changed from 2.52 atm to 1.50 atm the new volume will be

A hot air balloon is filled with 15 moles helium gas and 5 moles nitrogen gas. What is the volume of the balloon at 1.01 atm and 300 K?

5. Which of these changes is a chemical change? A. iron rusting B. water boiling C. glass breaking D. a balloon popping