11.53g sample of NaBr contains 22.34% Na by mass Considering the law of constant composition how...
A 10.45 g sample of NaBr contains 22.34 % Na by mass. Considering the law of constant composition (definite proportions), how many grams of sodium does a 8.33 g sample of sodium bromide contain?
What is the percent composition of 1 molar mass of NaBr? Select one: O a. 30.27% Sodium and 69.73% Bromine b. 22.34% Sodium and 77.66% Bromine C. 14.11% Sodium and 85.89% Bromine O d. 23.42% Sodium and 76.58% Bromine
1) How many grams of Na are there in a sample of Na that contains 9.68×1023atoms? 2) How many GRAMS of potassium bromide are present in 1.85 moles of this compound ? 3) . How many MOLES of potassium bromide are present in 3.00 grams of this compound ? 4) How many GRAMS of silicon are present in 3.73 moles of silicon dioxide ? 5) How many MOLES of oxygen are present in 4.59 grams of silicon dioxide ?
16 A) If 19.2 grams of an aqueous solution of sodium bromide, NaBr , contains 1.41 grams of sodium bromide, what is the weight/weight percent of sodium bromide in the solution? Weight/weight percent = ________%NaBr B) An aqueous solution of aluminum iodide, AlI3, contains 10.4 grams of aluminum iodide and 17.6 grams of water. What is the weight/weight percent of aluminum iodide in the solution? Weight/weight percent =_____ % C) How many mL of methyl alcohol are required to make...
A sample of glucose, C6H12O6, contains 1.270×1021 carbon atoms. 1.How many atoms of hydrogen does it contain? 2.How many molecules of glucose does it contain? 3.How many moles of glucose does it contain? 4.What is the mass of this sample in grams?
A sample of glucose, C6H12O6, contains 1.280×1021 carbon atoms. Part 1: How many atoms of hydrogen does it contain? Part 2: How many molecules of glucose does it contain? Part3: How many moles of glucose does it contain? Part 4: What is the mass of this sample in grams?
Acetohydrazine is an organic compound with the chemical formula C2H6N2O. Its percent composition by mass is: 8.163% hydrogen 21.60% oxygen 32.43% carbon 37.81% nitrogen How many grams of carbon does a 38.64 g sample of acetohydrazine contain?Be sure to use the correct number of SFs for your answer.
2) A gold necklace contains 0.54 mol of gold. What is its mass in grams? 3) A helium balloon contains 0.56g of He. How many moles of He does it contain? 4) How many Na atoms in 255 g of Na3PO4? 5) Calculate the mass in grams of 6.4 x 102 NO: molecules 6) Determine the number of atoms of O in 84.0 g of CsH1005
LILULUI 1. How many grams of Na" are present in 1.63 grams of sodium sulfide? grams Na 2. How many grams of sodium sulfide contain 1.62 grams of Na? grams sodium sulfide. Subm Answer Retry Entire Group 7 more group attempts remaining
A toothpaste contains 0.230 % by mass sodium fluoride used to prevent dental caries and 5.7 % by mass KNO3, which decreases pain sensitivity. One tube contains 119 g of toothpaste. 1) How many grams of sodium ion, Na+, are in 2.50 g of toothpaste? 2) How many KNO3 formula units are in the tube of toothpaste?