Question 5 How many moles of H20 in a 182 g of H2O sample? (molar mass...
Gold has a molar mass of 197 g/mol. (a) How many moles of gold are in a 9.45 g sample of pure gold? (b) How many atoms are in the sample?
Gold has a molar mass of 197 g/mol. (a) How many moles of gold are in a 1.67 g sample of pure gold? (b) How many atoms are in the sample?
12. How many moles of O2 (molar mass -32.00 g/mol) are needed to react completely with 52.0 L of CH4(8) at STP to produce CO2 and H20? (molar mass (CH) 16.04 g/mol) a) 11.6 b) 2.32 c) 4.64 d) 52.0 e) 104
how many moles of water, H2O, are present in 25.0 g H2O? How many moles of water, H20, are present in 25.0 g H20? 4.41 moles 0.56 moles O 1.39 moles 7.50 moles 1.35 x 103 moles
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...
Useful information: C=4.184 gºl.°C for liquid H2O, molar mass of H2O is 18.015 g/mole. 1. Many compounds can exist in more than one solid form. These different forms may have very different physical properties as a result of how the molecules are arranged in the solid. An example that we are all familiar with is the different allotropic forms of C (diamond and graphite). Another example of this phenomenon is PbO, which exists in a yellow and a red form....
Question 5 (2 points) How many moles of oxygen are formed when 58.6 g of KNO3 decomposes according to the following reaction? The molar mass of KNO3 is 101.11 g/mol. 4 KNO3(s) 2 K20(s)2 N2(g) + 5 O2(g) 0.290 mol 02 0.580 mol02 18.5 mol 02 0.724 mol 02 1.73 mol 02
Question 2 of 5 Submit How many moles of H20 can be formed from 3.02 x 1023 atoms of NH3 from the following equation? 4 NH3 (9) +502 () 4 NO (9) + 6 H2O (9) mol 0 0 0 x 100 0
A 1.1184 g sample of a hydrocarbon is combusted to give 2.1345 g of H20 and 3.2809 g of CO2. (a) How many mol of H and C are in this sample? (b) What's the molar ratio between C and H? (Hint: use x:1 or 1x to represent the ratio) (c) If the moles of this sample is determined to be 0.03728 mol, what is the molecular formula of the compound? TT T Arial : 3 (12pt) + T 5...
The molar mass of a compound expresses the ratio of mass to moles Part A molar mass- _mass in gr tert-Butyl alcohol is a solvent with a Kf of 9.10 °C/m and a freezing point of 25.5 °C. When 0.807 g of an unknown colorless liquid was dissolved in 11.6 g of tert-butyl alcohol, the solution froze at 15.3°C number of moles This quantity can be determined experimentally by accurately measuring the mass of the sample and determining the corresponding...