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Solid lithium hydroxide is used in a space vehicles to remove exhaled carbon dioxide from the living environment by forming solid lithium carbonate and liquid water. What mass of gaseous carbon dioxide can be absorbed by 1.00 kg of lithium hydroxide?
Start with the equation for the reaction: $2 "LiOH"+"CO"_2 \rightarrow "Li"_2"CO"_3+"H"_2"O"$ So one mole of lithium hydroxide reacts with one-half mole of carbon dioxide. By adding up atomic masses we...
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The molecular formula of calcium chloride is CaCl2. What is the molecular weight of this drug?
Weight of $Ca$ = $40$ Weight of $Cl$ = $35.5$ Molecular formula is $CaCl_2$ i.e. $1$ atom of $Ca$ and $2$ atoms of $Cl$. Hence, molecular weight = $"1...
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Lithium and nitrogen react to produce lithium nitride: $6Li(s) + N_2(g) -> 2Li_3N(s)$. How many moles of lithium nitride are produced when 0.710 mol of lithium react in this fashion?
Since the given information is in moles, we need only look at the ratio between the chemicals: Six moles of Li will produce 2 moles of lithium nitride. So, the...
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5. Lithium nitride has the chemical formula $Li_3N$. Rubidium is in the same chemical family as lithium. What is the formula of rubidium nitride?
Rubidium, an alkali metal, commonly forms $Rb^+$ salts, just as lithium commonly forms $Li^+$ salts. We would assume that the formula of rubidium nitride (if it exists!) is $Rb_3N$.
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What is the percentage of lithium in lithium carbonate $(Li_2CO_3)$?
Acquiring the percentage requires the usage of "unified" units, meaning units that are equivalent across the board, because a percentage is really a unitless fraction (all the involved units must...
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What is the percentage of lithium in lithium carbonate $Li_2CO_3$?
First step, find the molar mass of $Li_2CO_3$. The molar mass is same as atomic weight on . But you have to see what are present in this formula. You...
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A $2.03*g$ mass of calcium salts contains $1.33*g$ calcium carbonate. What is the $%$ calcium carbonate; and what is the percentage by mass of of calcium in calcium carbonate?
So we have the $"%calcium carbonate, "m/m$. We are not finished yet, because we have to address the percentage by mass of calcium metal in calcium carbonate: $%Ca=(40.08*g*mol^-1)/(100.09*g*mol^-1)=40%$ with respect...
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Hydrogen peroxide has the empirical formula HO and an empirical formula weight of 17.0 amu. If the molecular weight is 34.0 amu, what is the molecular formula?
First, you want to find the ratio between the empirical formula and molecular formula; that is, how much has the molecular formula been simplified to reach the empirical formula. We...
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If $"38 g"$ of lithium carbonate reacts with excess zinc sulfate, what mass of zinc carbonate can be produced?
$"ZnSO"_4 + "Li"_2"CO"_3"$$rarr$$"ZnCO"_3 + "Li"_2"SO"_4$ The process used to answer this question will be: $color(red)("given mass Li"_2"CO"_3"$$rarr$$color(blue)("mol Li"_2"CO"_3"$$rarr$$color(green)("mol ZnCO"_3"$$rarr$$color(purple)("mass ZnCO"_3"$ The molar masses of lithium carbonate and zinc sulfate is...
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What is the mass of carbon dioxide required for the production of a $1*kg$ mass of lithium carbonate from lithium hydroxide?
We need (i) a stoichiometrically balanced equation.... $2LiOH(s) + CO_2(g)rarrLi_2CO_3(s) + H_2O$ And then (ii) we need equivalent quantities of carbon dioxide. There are.....$(1000*g)/(23.95*g*mol^-1)=417.5*mol$ with respect to lithium hydroxide....
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