What is the density of an object with a volume of 20cm cubed and a mass of 40g?

How many moles of hydrogen gas can be produced from 4 moles of aluminum?

Which statement describes the charge of an electron and the charge of a proton? (1) An electron and a proton both have a charge of 1. (2) An electron and a proton both have a charge of 1.

Connect the whole numbers on the periodic table to indicate what they represent?

Balance this equation. if a coefficient of "1" is required, choose "blank" for that box. ch3cho + o2 → co2 + h2o

Your high school football team needs 550 cm for a first down. How many yards is this?

What does pH measure? number of hydrogen atoms in an acid number of hydroxide atoms in a base concentration of hydrogen ions in solution concentration of hydroxide ions in solution

Based on charles's law, which of the following statements is true for an ideal has at a constant pressure and mole amount? A. The number of collisions is independent of volume B. The number of collisions decreases with increase in volume C.

50. mL of water is initially 70. k and cooled to 25. k. What is the thermal energy?

Which of the following statements is true about both nuclear fusion and nuclear fission? They occur in the sun. Heavy atoms are split. Two light nuclei combine. Some mass changes into energy.

What does the name iron (II) in a compound indicate about the cation? A an 11 + charge B a 2 - charge C a 2 + charge