3.01 x 10^23 atoms of rubidium

Duncan takes a break from studying and goes to the gym to swim laps. If swimming burns 705 calcal per hour, how many kilojoules does swimming burn in that same amount of time? In other words, convert 705 calcal to kilojoules.

Why does a bromine atom have a much smaller radius than a potassium atom, even though a br atom has 16 more electrons than does a k atom?

Which of these is caused by a chemical change? a. the honey in a jar crystallizes and will no longer pour. b. the skin of a banana turns from green to yellow as it ripens. eliminate c. a box of powdered brown sugar turns into a solid brick over time.

Calculate the hydrogen-ion concentration (H+] for the aqueous solution in which [OH-1 is 1 x 10-12 mol/L.

The type of chemical bond that involves the transfer of electrons between atoms is a (n) bond.

Provide a method for separating the mixtures of two or three compounds, dissolved in a solvent diethyl ether. In each case one of the components will be a neutral compound. You should give your answer in the form of a flow chart (see Section 12.12).

8.000 moles of Cl2 (g) react with excess P4 (s) to produce 0.5741 mol of phosphorus trichloride. What is the percent yield for this reaction? P4 (s) + 6 Cl2 (g) → 4 PCl3 (l)

5.75 moles of H2 gas to liters at STP

3.01 x 10^23 atoms of rubidium

What are the values of STP