If you could count two atoms every second, how long would it take you to count a mole of matter? assume that you could count continually 24 hours every day.

Correct the name to match the formula of the following compounds: (a) calcium (ll) dichloride. CaClZ; (b) copper (|l) oxide. Cu20; (c) stannous tetrafluoride. SnF4; (d) hydrogen chloride acid, HCL

How do we know that caramelizing sugar is a chemical change? A.) It involves dissolving sugar in water. B.) It changes the state of sugar from a solid to a liquid. C.) It separates sugar from a sugar solution. D,) It changes the sugar's color.

Can the density of an object change?

A gaseous sample of nitrogen contains 2.41 grams (0.086 mol). What volume does this mixture occupy at 28 °C and 1.05 atm of pressure? Hint = Be sure to convert to Kelvin first! 0.19 L 0.38 L 1.8 L 2.0 L 4.0 L

What coefficient of O2 is needed to balance the equation C3H8 + O2 - > 3CO2 + 4H20? a. 2 b. 3 c. 5 d. 6

A solution that is 33.6 % by mass of phenol (C6H5OH) in water is prepared. What is the mole fraction of the phenol?

Describe the law of conservation of momentum

14. What steps should you take to keep parents and the public from viewing your personal information on social networks?

Match the factors which affect the rate of dissolving/dissociation/diffusion.

How would the equilibrium of an exothermic reaction at 25°c be affected if the temperature of the system were reduced? (hint: apply le chatelier's principle) ?