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the set of all functions of {1 2 3...,10} to itself forms a group w.r.t the composition of function.true or false
Percent Composition and Empirical Formula
1. Phosphoric acid (H3PO4) is a colorless, syrupy liquid used in detergents, fertilizers, toothpastes,
and in carbonated beverages for a “tangy” flavor. Calculate the percent composition by mass of H, P,
and O in this compound.
2. Propane is hydrocarbon, a compound composed only of carbon and hydrogen. It is 81.82%
carbon and 18.18% hydrogen. What is the empirical formula?
Take the data of the output of your organisation, summarise them with some tool (like bar chart, pie chart, etc.) and discuss the result. Give your opinion to improve the results in the future
Solve the following stoichiometry grams-grams problems:
1) Using the following equation:
Pb(SO4)2 + 4 LiNO3
Pb(NO3)4 + 2 Li2SO4
How many grams of lithium nitrate will be needed to make 250 grams of lithium sulfate,
assuming that you have an adequate amount of lead (IV) sulfate to do the reaction?
2) Using the following equation:
Fe2O3 + 3 H2 -------------> 2 Fe + 3 H2O
Calculate how many grams of iron can be made from 16.5 grams of Fe2O3 by the following
equation.
Four coins are tossed. Let T be the random variable representing the number of tails that occur. Construct a probability distribution table and find the probability of picking 2 tails.
Solve the following stoichiometry grams-grams problems:
1) The combustion of a sample of butane, C4H10 (lighter fluid), produced 2.46 grams of water.
2 C4H10 + 13O2 -------> 8CO2 + 10H2O
(a) How many moles of water formed?
(b) How many moles of butane burned?
(c) How many grams of butane burned?
(d) How much oxygen was used up in moles?
(e) How much oxygen was used up in grams?
2) Using the following equation:
2 NaOH + H2SO4 2 H2O + Na2SO4
How many grams of sodium sulfate will be formed if you start with 200 grams of sodium
hydroxide and you have an excess of sulfuric acid?
Take the data of the output of your organisation, summarise them with some tool (like bar chart, pie chart, etc.) and discuss the result. Give your opinion to improve the results in the future
A box contains 6 balls labeled form 0 to 5. Three balls are drawn without replacement. Construct the sampling distribution of the following sample statistics of the labels of the balls drawn.
A.sample mean
B.sample range
C.sample max (the highest number in a set)
D.sample min (the lowest numbef in a set)
Convert the following number of moles into their corresponding number of particles.
10. 0.0455 moles of hydrochloric acid
11. 1.2 moles of glucose (C6H12O6)
12. 0.32 moles of sodium bicarbonate
Convert the following masses into their corresponding number of moles.
6. 23.5 g of sodium chloride
7. 0.778 g of sodium cyanide
8. 0.250 g of water
9. 169.45 g of calcium acetate
10. 79.9 g of potassium permanganate
