The total number of oxygen atoms indicated by the formula al2 (cr2o7) 3 is

A sample of ideal gas is in a sealed container. The pressure of the gas is 435 torr, and the temperature is 3 ∘C.

Technology has given rise to industry. True or False

Look at the diagram below. What type of nuclear decay is shown? Question 1 options: Alpha. Beta. Gamma. No nuclear decay has occurred. Look at the diagram below. What type of nuclear decay is shown? Question 2 options: No nuclear decay has occurred.

Noble gases have zero electron activity, why?

Which process releases heat? A. Grilling vegetables B. Frying an egg C. Boiling water D. Setting off a firecracker

Mass box A = 10 grams; Mass box B = 5 grams; Mass box C-made of one A and one B How much A and B would be needed to produce 30 grams of C? g of A; g of B.

How many moles of tin atoms are in a pure tin cup with a mass of 37.6 g?

Which best explains how Dmitri Mendeleev organized elements in his periodic table? O A. Elements were ordered based on their discovery date. O B. Elements were ordered based on their economic value. O C.

The rocks and minerals of the Earth consist of compounds.

Do the number of protons in an atom of an element always equals its atomic weight.