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Calculate the number of moles in 0.2g of NaCl

N= M/MrMr of NaCl= 23+35.5=58.5N= 0.2/58.5= 0.0034188
EM
Answered by Emma M. • Chemistry tutor
2513 Views

What is the solution to x^2 + 5x - 7 = 0

X can be found by using the quadratic equation. x = -b plus or minus (b 2 -4ac) 1/2 /2a. We find that x=-5/2 plus or minus (53) 1/2 /2.
SA
Answered by Sacha A. • Maths tutor
4376 Views

How come two people who are both Christians can have different beliefs about issues such as abortion?

Christianity is a religion with different denominations - which means that there are different churches and beliefs even within Christianity itself. Different denominations and individual Christians themselv...
JW
2467 Views

In Shakespeare’s ‘comedy’, Twelfth Night, why is bullying and wit celebrated?

Shakespeare presented the Puritanical Malvolio as a comic villain, whose downfall the audience revels in. This concept, known as Schadenfreude, is typical of comedic fiction. Malvolio’s arrogance and hubris ...
CM
7082 Views

16.4 g of Ca(OH)2 was reacted with HCl in a reaction. What was the expected mass of CaCl2, given the mass of the reactant Ca(OH)2 was 12.6 g? What is the percentage yield of the reaction? ( Give all answers to 3 significant figures)

Ca(OH) 2 :Mass = 12.6 g Molar mass= 40.1 + (16 x 2) + (1 x 2) = 74.1 g/molMoles = Mass / Molar mass = 12.6 g / 74.1 g/mol = 0.17 molThe molar ratio is 1:1 of Ca(OH) 2 : CaCl 2 . ( 1 molecule of Ca(OH) 2 reac...
YK
2094 Views