According to the balanced reaction below, calculate the moles of NH, gas that form when 4.2 mol of N,H, liquid completely reacts: 3 N,H,(1) – 4 NH,(g) + N,(g)

Your lab partner accidentally mixed some sodium chloride with your sample of Epsom salts (MgSO₄･7H₂O). You want to make a standard solution of magnesium ion, and this is the only sample of a magnesium salt you have. To determine the amount of magnesium salt in the mixture, you heat 100.00 g to drive off the water of hydration and find that the anhydrous mixture has a mass of 57.75 g. How many grams of the original salt mixture must you add to 1.000 L of water to make a 0.100 M solution of Mg²⁺ ion?

Given the reaction: 2C,H, + 70, → 4C0, + 6H,0 What is the total number of moles of CO, produced by the complete combustion of 5.0 moles of C,H,? 2.0mol 1.0mol 5.0mol O 10.mol

Identify the reactants and products in a chemical equation, and complete the tables to indicate how many atoms of each type of element are present on either side of the following equations. 2KCO (s) --> 2KCl (s) + O2 (g)

How many grams of O2(g)O2⁡(g) are needed to completely burn 80.8 g C3H8(g)?

Answer the questions about the balanced reaction 3A + 2B The molar masses are as follows: A = 10. g B = 20. g How many calories are evolved when 5.71 g of B is consumed? mol B (5.71 g B)(-- t. yes g B u. no mol B)(-- cal mol B Is the relationship between moles of B and calories a direct proportion? a. 0 b. 1 c. 2 d. 3 e. 4 f. 5 h. 7 k. 30 1.70 m. 100 n. 0.143 o. 14.3 S. 5.71 1 C + 100. cal C = 70. g g. 6 p. 0.286 mol B i. 10 9. 0.429 j. 20 r. 4.29 cal

A sample of 0.60 g of carbon dioxide was obtained by heating 1.48 g of calcium carbonate. What is the percent yield for this reaction? CaCOj(s) —+ CaO(s) + CO,(s) % 405 Supporting Materials

The Apollo 13 mission astronauts are running out of oxygen and need to get rid of the excess carbon dioxide. You know that sodium hydroxide can remove carbon dioxide from the spacecraft cabin. The filter which they had been using is fully saturated and no longer works. The astronauts have a 5 kg container of sodium hydroxide on the ship. The reaction to neutralize the air, remove carbon dioxide with sodium hydroxide is shown below CO2(g) + 2NaOH(s) ⟶⟶ Na2CO3(aq) + H2O(l)   The astronauts have 2 days left before they land on earth. You know that there are three astronauts, and each astronaut emits roughly 500. g of carbon dioxide each day. Is there enough sodium hydroxide in the cabin to cleanse the cabin air of the carbon dioxide, or are the astronauts doomed? Calculate how much sodium hydroxide is required to remove all the carbon dioxide from the three astronauts.  Be sure to show all your work!

Asprin can be made in a laboratory by reacting acetic anhydride (C4H6O3) with salicylic acid (C7H6O3) to form asprin (C9H8O4) and acetic acid (C2H4O2). The balanced equation is: C4H6O3 + C7H6O3 ------> C9H8O4 + C2H4O2 In a laboratory synthesis, a student begins with 5.00 mL of acetic anhydride (density = 1.08 g/mL) and 2.08g of salicylic acid. Once the reaction is complete, the student collects 2.06g of asprin. Determine the percent yield for the reaction.

Consider the reaction below LiOH+KCL LiCL+KOH If 20.0 grams of lithium hydroxide LiOH are used, what is the theoretical yield of lithium chloride LiCL?