**Plz help with this asap who ever replies first with the right answer will get brainlists What is the approximate volume of 280 g of chlorine gas (Cl2) at STP?

A. 22L
B. 7.9 L
C. 180 L
D. 88 L

How many atoms are there in 3.3 moles of strontium?

A. 2.00 x 10^24 atoms
B. 1.11 x 10^11 atoms
C. 4.24 x 10^23 atoms
D. 3.21 x 10^32 atoms

Cryolite, na3alf6(s), an ore used in the production of aluminum, can be synthesized using aluminum oxide. start this question by first balance the chemical equation.1.) balance the equation: - alo3(s)+naoh(l)+hf(> na3alf6+h2o(g). 2.) if 17.5 kilograms of al2o3(s), 51.4 kilograms of naoh(l), and 51.4 kilograms of hf(g) react completely, how many kilograms of cryolite will be produced? 3.)which reactants will be in excess, (al2o3, naoh, or hf) 4.)what is the total mass of the excess reactants left over after the reaction is complete in kg?

What causes different colors to appear in the sky? the absorption of light by air molecules the reflection of light by bodies of water the greenhouse effect in earth's atmosphere the scattering and reflection of light by dust particles

Which of the following is a chemical property of water at 4 c