What tool is used to measure the mass of something?

What kind of energy transformation occurs in a gasoline-powered car? A. Chemical energy is converted into mechanical energy. B. Mechanical energy is converted into light energy. C. Light energy is converted into sound energy. D.

1. A proton has a positive charge. What is the charge of a particle that is attracted to a proton? a. negative b. neutral C. positive d. repulsive

What does the arrangement of the periodic table tell scientists

Both E. coli and Salmonella are single-celled organisms. They do not have a nucleus or other membrane-bound organelles. Based on the concept of domains, what do they have in common? They both belong to kingdom Fungi.

How many atoms are in 2.50 moles of co2? a. 4.52 x 1024 atoms b. 1.52 x 1024 atoms c. 5.02 x 1023 atoms d. 3.01 x 1024 atoms e. 7.53 x 1023 atoms?

A 390 mL solutions of 4.6 M HCl is left out over the weekend and 74 mL of solvent evaporates. What is the new concentration of HCl?

How many grams of NH3 can be produced from the reaction of 17.8 moles of H2 and a sufficient supply of N2? N2 + 3 H2 → 2 NH3

A 5.00g ball of hot iron at 200 degrees celcius is dropped int owater at 20 degrees celcius. The system acheives thermal equilibrium at 25 degrees celicus. calculate the mass of water heated.

How can human activity can impact an organism's ability to obtain the resources it needs to survive

At STP, how many liters of oxygen are required to react completely with 3.6 liters of hydrogen to form water, 2H 2 (g) + O 2 (g) - --> 2H 2O (g) ?