4.
M=Mol/vol
M= 0.2mol/2.0L
M=0.1mol/L
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The teacher said we should only balance with whole nubbers so would it be
2H2 + O2 = 2H2O....?
moles of H
0.22 mol
sooo... moles of O is also 0.11mol?
c)calculate the number of moles of water produced when 4.00 g of oxygen are used
2H2 + O2 = 2H2O...
Hi, I have some reviw questions for the upcomming chemistry exam, the problem is I don't have the answers so can some one read throught my work and check if it is wright? Thanks.
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1. An anaysis of a valitile liquid shoed that it wsa composed of 14.4%C, 2.37% H and 83.49% Cl. If 4.25 g of...
Pleas help! exam tommarow!!!! Trigonometry word problems
Hi, i really need help with this question,
on a wall, a spider is 100cm above a fly. the fly starts moving horizontally at the speed of 10cm/s. After 1s, the spider begins moving at twice the speed of the fly, in such a way as to...
Its supposed to be sequences and series
so what I was doing was finding the % of medicnin that was in his body, but I guess this approach was wrong
So I have to find the amount of medicin that is in his body
So...
t0=5oomg
t1=625mg
t2=656.25
Then
tn-1 x 0.25+500
would be the recursave fomula
Tod injured his wrist while he was skateboarding. To relive the pain his doctor prescribed him some medication. He takes 500mg of medicine every 6h. Only 25 % of the medication remains in his body by the time he is ready to take another pill.
Write and equation to model this.
so 25% is...
1.
are you sure? the answer in the back of the book sayes it is 34 and i cheked it again.
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2. ok, thanks
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4. the sum of 50 consecutive even intergers is 3250. tha...
Please help I have ALOT of questions!!
1.)Starting at 888 and counting backward by 7, a student counts 888, 881 and 874, and so on. Which of the following numbers will be included?
a) 35 b) 34 c) 33 d) 32 e) 31
Ok, so I by using the calcuator the aswer is 34, but how would you calcuate...
OK, these questions are supposed to be really easy, but I keep geting the wrong answer and I don't understand why, could someone pleas look at my work and tell me what I am doing wrong?
Find the indicated sum of each arithmetic series
S15 for 4 + 11 + 18 + ...
Sn= n/2 [ 2a + ( n - 1 ) d...
The cost of extracting and purifying metals is varied for various reasons, this means that the company might not make profit on the iron ore.
Since there is a ,relatively, large amount of iron ore it is cheap. This means that the company needs to find a lot of it in order to make a profit.
If...
I really don't know what catagoir this would go under :confused: , but its an assignment for chem so...
Woud there be any positive envromental impacts of iron ore extraction? This was on of the topics we had to reaserch, but form 3 days of searching throught the net, positive effects iron ore...