
13. What is the mass in grams of a) 7.10 x 10'mol of oxygen gas? b)...
2.A sample of C7H13O3 has a mass of 24.52 grams. What is the percent oxygen in this compound? 3.A compound containing only nitrogen and oxygen is found to be 33.35% nitrogen. Determine the empirical formula of this compound. What is the value of the subscript for oxygen in the formula you calculated? 4.Assume 1.00 mole of hydrogen gas (H2) reacted in the following equation, using the concept of mole ratio predict the change in the remaining reaction components. 3 B2Cl4...
* 10 What is the mass in grams of a sample of Mg(CIO3)2 that contains 6.0 x 1020 atoms of oxygen? (A) 31717. grams (B) 3. 1529 x 1047 grams (C) 1. 1502 grams (D) 31. 299 grams 11 Name the compound Pb(NO3)4. (A) lead (II) nitrite (B) lead (II) nitrate (C) lead (IV) nitrate (D) lead (III) nitride 12 What is the mass % of carbon in (C2H SO)? (A) 7.74% (B) 60.0 % (C) 20.6% (D) 30.7% (E)...
Part B What mass of carbon dioxide is produced from the complete combustion of 7.10×10−3 g of methane? Express your answer with the appropriate units. Part C What mass of water is produced from the complete combustion of 7.10×10−3 g of methane? Express your answer with the appropriate units. Part D What mass of oxygen is needed for the complete combustion of 7.10×10−3 g of methane? Express your answer with the appropriate units.
if
3.011 x 10^23 molecules have a mass of 20.04 grams, what is the
mokar mass if this substance?
8) If 3.011 x 1023 molecules have a mass of 20.04 grams, what is the molar mass of this substance? A) 40.08 g/mol B) 10.02 g/mol C) 20.04 g/mol D) 6.658 x 10-23 g/mol E) none of the above
Using the below chemical equation, what mass, in grams, of magnesium oxide is produced when 0.2343 moles of oxygen gas reacts completely? The molar mass of oxygen gas is 31.998 grams per mole and the molar mass of magnesium is 24.305 grams per mole. Make sure to include the correct unit symbol with the answer choice. 2Mg + O2 →→ 2MgO
Calculate the following quantities: (a) mass, in grams, of 1.50 x 10^-2 mol CdS (b) number of moles of NH4Cl in 86.6 g of this substance (c) number of molecules in 8.447 x 10^-2 mol C6H6 (d) number of O atoms in 6.25 x 10^-3 mol Al(NO3)3
An oxygen gas container has a volume of 20.0 L. How many grams of oxygen are in the container if the gas has a pressure of 887 mmHg at 24 ∘C? Mg metal reacts with HCl to produce hydrogen gas. Mg(s)+2HCl(aq)→MgCl2(aq)+H2(g) What volume of hydrogen at 0 ∘C and 1.00 atm (STP) is released when 9.40 g of Mg reacts? How many grams of magnesium are needed to prepare 6.90 L of H2 at 775 mmHg and 20 ∘C?
A sample of gas consists of oxygen (molecular mass 32 g/mol) and neon (20 g/mol). The sample has a mass of 168 g and contains a total of 6.0 moles of gas. What is the quantity of oxygen in the sample?
If 27.5 mol of an ideal gas is at 2.81 x 10 Pa at 13 °C, what is the volume of the gas? 3 volume: .296
1. What is the mass of both oxygen and magnesium oxide in magnesium oxide if 0.15 g magnesium was fully burned in oxygen (The molar masses are 24.305 g/mol for magnesium, 15.999 g/mol for oxygen and 40.304 g/mol for magnesium oxide.)? List the moles of magnesium, oxygen, and magnesium oxide. a. 0.15 g b. 0.090 g c. 0.099 g d. 0.25 g