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sammyj
multi choice question working out moles?
lanthanum carbonate is insoluble and precipitates according to the following equation.
2 la3+ + 3CO32- = La2(co3)3
a solution containing 0.6 mol of lanthan is added to a soltuion containing 0.6 mol of sodium carbonate. How much lanthanum carobnate is preciptated.?
a) 0.2 mol
b 0.3 mol
c 0.5 mol
d. 0.6 mol
i believe the answer is b
1 AnswerChemistry9 years agoTrigonometry math questions?
Two wires, BA and BC hold a wooden bean AC with end A on horizontal ground and end C 120 cm above the ground. The beam is of length 650cm. BA and BC make Angles of 53 and 34 with the horizontal as shown on the diagram. By how much does BA exceed BC?
Here is the diagram : http://imageshack.us/photo/my-images/688/mathtrian...
1 AnswerMathematics9 years agoindices help??????????
simplify - i want the working out so i can follow and do the next 2 by myself.
2^n+2 + 12 / 5 times 2^n + 15
1 AnswerMathematics9 years agohow to find percentage by mass when given concentration and density?
The electrolyte from a car battery has a H2SO4 concentration of 4.5 mol L and a density of 1.18 g mL. what percentage by was of H2SO4 in the electrolyte?
1 AnswerChemistry9 years agoWhat three important functions occur in a living cell as a result of catabolic reactions?
also give an example of each function.
1 AnswerBiology9 years agoGive me three industries and there products that use electrolysis?
please all the ones I am getting are the same
2 AnswersChemistry10 years agoElectrolysis set up with copper sulphate solution with copper and carbon electrodes?
I know that one of the equations is cu2+ + 2e- = cu(s) but what is the other half equation?
2 AnswersChemistry10 years agoenvironmental effects on phenylketonuria?
environmental effects on phenylketonuria.
2 AnswersBiology10 years agocultural issues that affect success in politics?
1 AnswerSociology10 years agoexponential functions?
150g of a radioactive substance decays exponentially at a rate of 4% every 10 years.
write an equation to express the amount(A) left after (t) years ?
1 AnswerMathematics10 years agoexponential functions?
A towns population grows exponentially. In 1981 there were 25608 people and in 1991 there were 34207 people.
what was the growth rate per year(as a percentage)?
1 AnswerMathematics10 years agoexponential functions?
I have been trying to get it for ages.
150g of a radioactive substance decays exponentially at a rate of 4% every 10 years.
write an equation to express the amount of A left after t Years.
1 AnswerHomework Help10 years agohow do visual and written texts make our world smaller?
"Texts can make our world smaller, not larger. Discuss this idea with reference to your wider reading and viewing."
not text messages
1 AnswerHomework Help10 years agofeatures that make gas exchange in fish easier?
The question above
also
explain why parallel flow would not achieve adequate rates of gas exchange?
2 AnswersOther - Science10 years agois high or low iron levels better for ponds?
also phosphate
nitrate
ammonia
is high or low levels best or moderate levels.
1 AnswerEarth Sciences & Geology10 years agoprejudice examples gran torino?
I need some examples for an essay i am writing. I only have 1 and i need 3.
2 AnswersMovies10 years agoFind the areas of the following rectangles. simplify?
ones side is x + 7 and the other x.
I don't fully understand what it is asking, find x or what?
also
2. express in factors. I hate these different words for the same thing.
x squared + 5x
2 AnswersHomework Help10 years agoAdvertising provides information more than it influences attitudes?
Argue for or agaist this statement
I am goign for. can anyoen give me some ideas?
3 AnswersOther - Advertising & Marketing1 decade ago
