Calculate the percent by mass and the molality in terms of CuSO4 for a solutionprepared by dissolving 11.5g of CuSO4.5H2O in 0.1000kg of water Remember to consider thewater released from the hydrate. 相关知识点: 试题来源: 解析 解m(CuSO_4)=11.5*(159.61)/(249.69)=7.35(g) 则w(CuSO_...
Calculate the percent composition for each of the elements in the compound Determine the empirical formula of a compound having the following percent composition by mass: K. 24.74%; Mn: 34.76%; O: 40.50% Calculate the percent by mass of the element ...
mass Cu^2+ = (7.668*10^-3 mol) * 63.55 g mol^-1 = 0.4873g percent by mass = 0.4873g * 100 = 48.73% Logged mjc123 Chemist Sr. Member Posts: 2074 Mole Snacks: +302/-12 Re: Calculate the % by mass of oxalate «Reply #9 on:December 17, 2014, 05:00:52 AM » ...
Re: Calculate the percent by mass? using molality « Reply #3 on: January 31, 2010, 01:25:05 PM » Assume 1kg of chloroform is the solvent.Molality = (mol of solute) / (kg of solution)So now you should have mol of solute. Use stoichiometry from there to get the mass of caf...
s usually done by having someone place a tape measure on you and take multiple sizes. Thisprocessmay involve measuring your waist and hips as well. The average person has a BFP of 25 percent, which means that the average person is about 75 percent muscle. The best way to improve your ...
Given the molecular formula of any compound as well as a periodic table of the elements, calculate the compound's mass ratio, also called the percent composition by mass.
to calculate x percent of y: divide x by 100. multiply x by y. the resultant number is x% of y. quiz on percentage calculation q 5 put your understanding of this concept to test by answering a few mcqs. click ‘start quiz’ to begin! select the correct answer and click on the “...
Mass composition Composition in moles Moles to mass 2. What is the percent composition of Cu₂S? 80% Cu, 20% S 20% Cu, 80% S 50% Cu, 50% S 66% Cu, 34% S Create your account to access this entire worksheet A Premium account gives you access to all lesson,...
A 10.0 mL portion of an acetic acid solution requires 24.0 mL of 0.102 M NaOH solution for neutralization. Calculate the percent (by mass/volume) of the acetic acid in this solution. You need to make 50.0 mL of a 3.00 M sodium hydroxide solution for your experim...
You can use any units you wish for the concentration values and volumes, so long as you use the same units for each of the two solutions. Concentration can also be expressed by percent composition by mass, mole fraction, molarity, molality or normality. ...