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One chlorine (Cl) atom combines with one sodium (Na) atom. How many potassium (K) atoms combines with a chlorine atom?
$"Sodium chloride, potassium chloride, rubidium chloride,"$ $"caesium chloride,"$ all have a formula of $MCl$, where $M$ is the alkali metal. All the alkali metals have similar electronic configurations; thus they...
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A compound is formed when 9.03 g Mg combines completely with 3.48 g N. What is the percent composition of this compound?
The formula for is $"% by mass" = "mass of a component"/"total mass" × 100 %$ You have $"9.03 g Mg"$ and $"3.48 g N"$, so $"total mass =...
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An unknown compound has a percent composition of 52.10% potassium, 15.8% carbon, and 32.1% oxygen. The molar mass of the compound is 150.22 g/mol. What is the empirical formula and the molecular formula of this compound?
As is typical with these questions, we assume $100*g$ of unknown compound, and work out the MOLAR quantities of each element present: $" moles of C":$ $(15.8*g)/(12.011*g*mol^-1)=1.32*mol$ $" moles of...
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If 3.907 g carbon combines completely with 0.874 g of hydrogen to form a compound, what is the percent composition of this compound?
And, of course for a binary compound, $%H=(100-82)%=??%$
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A sample of sulfur having a mass of 1.28 g combines with oxygen to form a compound with a mass of 3.20g. What is the empirical formula of the compound?
Since your compound will only contain sulfur and oxygen, you can conclude that the difference between the mass of sulfur and the mass of the final compound will represent the...
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A sample of sulfur having a mass of $1.28$ g combines with oxygen to form a compound with a mass $3.20$ g. What is the empirical formula of the compound?
Your goal when dealing with is to determine the smallest whole number ratio that exists between the that make up the compound. In order to do that, you first need...
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If 20.50g of Sn combine completely with 24.49g of Cl to form a compound, what is the percent composition of tin in the compound? What is the empirical formula of the compound?
The of tin in the compound will be equal to the ratio between the mass of tin and the mass of the compound, multiplied by $100$. $color(blue)("% Sn"...
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How do you determine the empirical formula of a compound that has the following composition: 92.3 percent C and 7.7 percent H?
And then we work out the molar composition. Thus $"Moles of carbon"$ $=$ $(92.3*g)/(12.011*g*mol^-1)=7.68*mol$. And $"Moles of hydrogen"$ $=$ $(7.7*g)/(1.00794*g*mol^-1)=7.64*mol$. Clearly, there is $1:1$ molar equivalence with respect to $C:H$....
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The atomic number of sulfur is 16. Sulfur combines with hydrogen by covalent bonding to form a compound, hydrogen sulfide. Based on the number of valence electrons in a sulfur atom, how do you predict the molecular formula of the compound?
We thus predict that hydrogen sulfide would have a formula of $H_2S$, an analogue of the popular $H_2O$ molecule.
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Each molecule of hemoglobin combines with four molecules of O2. If 1.00g hemoglobin combines with 1.60mL O2 at 37oC and 99.0 kPa, what is the molar mass of hemoglobin?
The idea here is that you need to use the equation to determine how many moles of oxygen gas you have in that sample. This will allow you to...
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