
O 12.01 Question 6 5 pts 1.8 moles of H2O2 has a mass of: 33.3 amu 1.85 g O 35.9 g O 62.9 g 0 33.3 g Question 7 5 pts
How many moles of NaF are in 58.1 grams of a 35.9% by mass NaF solution? Use 41.99 g/mol for the molar mass of NaF. Enter your answer without units. Type your answer D
A 33.3-cm-by-33.3-cm checkerboard has a mass of 85.5 g. There are four 18.7-g checkers located on the checkerboard, as shown in the figure. Relative to the origin located at the bottom left corner of the checkerboard, where is the center of mass of the checkerboard-checkers system? Xcm = ; Ycm =
Why does the formula mass of H2O2 is
calculated based on H2O2 (34 g/mol) rather
than HO (the simplest form), which equals to 17 g/mol ? Thanks.
Calculate the formula mass of each compound given below. Keep at least one decimal place in atomic masses from the periodic table. a) hydrogen peroxide, H202 Number 34.01468 amu
Nr of moles of C= mass of C/ molar mass of C Molar mass of C =12.o1 g= A In this case, A has measure unit in grams. But measure unit for A is Dalton or amu. Is the measure unit for A Dalton, amu, or grams? When I compute No of moles for carbon , I use A= 12.01 g, not A=12.01 amu. For exemple: for mass of C=24 g C Molar mass for: CO= A for C +A...
2 points How many moles of NaF are in 54.5 grams of a 33.3% by mass NaF solution? Use 41.99 g/mol for the molar mass of Naf. Enter your answer without units. Type your answer. Previous Next
Consider the reaction: 2 H2O2(g) ⇄ 2 H2O(g) + O2(g). 1.75 moles of H2O2 are initially placed in a 2.50 L reaction vessel. When equilibrium is reached 1.20 moles of H2O2 are left. Calculate the equilibrium constant Kc. 5.5×10-3 2.4×10-3 2.0×10-4 2.3×10-2 3.9×10-4
A student performed the experiment described in this module, using 7.00 mL of a 1.8% H2O2 solution with a density of 1.01 g ml-1. The water temperature was 20 °C, and the barometric pressure in the laboratory was 30.02 in. Hg. After the student immersed the yeast in the peroxide solution, she collected 45.1 ml of 02. (8) Calculate the number of moles of H2O2 reacting.
Determine the mass in units of grams [g] of 0.49 moles [mol] of a new fictitious compound you have developed in the lab. The formula is A2B4C8D5 The components are A amu=3;B,amu=26;C,amu=36;and D,amu=52.
QUESTION 7 How many moles of oxygen are produced by decomposing 85.5 g of H2O2 (molar mass = 34.0 g/mol) according to the equation: 2H202 -- ----> 2H20 + O2 O 1.056 mol O2 O 610 mol O2 2.11 mol O2 Onone of these QUESTION 8 In the reaction : 3Cl2 + 6NaOH ------> 5NaCl + NaClO3 + 3H20 How many grams of sodium chloride can be produced from 46.6 g of NaOH? 56.7 g NaCl 81.7 g Nai 68.1...