Which of the following has the greatest mass, in grams?1) 1 atom of gold (Au) 2) 1.0 mol mercury (Hg) atoms 3) 2.0 mole of chlorine (Cl) atoms 4) 25 atoms of mercury (Hg)

The graph represents the sales data for a particular product. In which week were 8 units sold? a. 3rd week b. 4th week c. 6th week d. 9th week

Chemistry How many water molecules are in 1.9 moles of water? Use 6.022 X 1023 for Avogadro's Number! Use "e-notation" when answering. 6.022 X 1023 would be entered as 6.022e23

Which of the following is a physical property of a substance? A. Hardness B. Flammability C. Reactivity D. Toxicity

How many moles of oxygen gas are required to react with 2.0 moles of sugar?

A 0.479 g sample of nitrogen, oxygen or neon gas occupies a volume of 265 ml at 157 kpa and 20◦c. what is the molar mass and identity of the gas?

What is the enthaply of the reaction?

Which color has a higher frequency, A. red light B. blue light

what is the volume of 0.98 mol oxygen (O2) gas at 275 K and a pressure of 2.0 atm? (the universal gas constant is 0.0821 L*atm/mol*K)

Which element is classified as an alkali metal? Rb Sr Zr Cl

Which statements about a neutral atom are correct? Check all that apply. The positively charged particles in the nucleus are positrons. The radius of the electron cloud is twice as large as the radius of the nucleus.