1. The exothermic reaction between liquid hydrazine (N2H2) and liquid hydrogen peroxide (H2O2) is used to fuel rockets. The products of this reaction are nitrogen gas and water. A. Write the balanced chemical equation.
B. How many grams of hydrazine are needed to produce 10.0 mol nitrogen gas?

2. Aluminum reacts with chlorine to produce aluminum chloride. Determine the mole ratio necessary to convert moles of aluminum to moles of aluminum chloride.

3. How many moles of cesium xenon heptafluoride (CsXeF7) can be produced from the reaction of 12.5 mol cesium fluoride with 10.0 mol xenon hexafluoride? CsF (s) + XeF6 (s)  CsXeF7 (s)

4. Lead(II) oxide is obtained by roasting galena, lea(II) sulfide, in air.
PbS (s) + O2 9g)  PbO (s) + SO2 (g)
A. Balance the equation and determine the theoretical yield of PbO if 200.0 g PbS is heated.
B. What is the percent yield if 170.0 g PbO is obtained?

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).

answer: i dont know the answer but this might

explanation:

l