Question

what is the molar mass of glucose, c6h12o6, in g/mol? answer to two decimal places. question 2 what is the molar mass of copper sulfate hexahydrate, cuso4 - 6h2o, in g/mol? answer to two decimal places. question 3 how many grams of magnesium chloride, mgcl2, are in 0.1250 mol of magnesium chloride? report your answer to two decimal places.

Explanation:

Step1: Find molar - mass of glucose ($C_6H_{12}O_6$)

The molar mass of carbon ($C$) is approximately $12.01\ g/mol$, hydrogen ($H$) is approximately $1.01\ g/mol$, and oxygen ($O$) is approximately $16.00\ g/mol$.
For $C_6H_{12}O_6$, $M = 6\times12.01+12\times1.01 + 6\times16.00$
$M=72.06+12.12 + 96.00=180.18\ g/mol$

Step2: Find molar - mass of copper sulfate hexahydrate ($CuSO_4\cdot6H_2O$)

The molar mass of copper ($Cu$) is approximately $63.55\ g/mol$, sulfur ($S$) is approximately $32.07\ g/mol$, oxygen ($O$) is approximately $16.00\ g/mol$, and hydrogen ($H$) is approximately $1.01\ g/mol$.
$M = 63.55+32.07+4\times16.00+6\times(2\times1.01 + 16.00)$
$M = 63.55+32.07+64.00+6\times(2.02 + 16.00)$
$M = 63.55+32.07+64.00+6\times18.02$
$M = 63.55+32.07+64.00 + 108.12$
$M = 267.74\ g/mol$

Step3: Find mass of magnesium chloride ($MgCl_2$)

The molar mass of magnesium ($Mg$) is approximately $24.31\ g/mol$ and chlorine ($Cl$) is approximately $35.45\ g/mol$.
The molar mass of $MgCl_2$ is $M=24.31 + 2\times35.45=24.31+70.90 = 95.21\ g/mol$
The mass $m$ of $0.1250\ mol$ of $MgCl_2$ is $m=n\times M$, where $n = 0.1250\ mol$ and $M = 95.21\ g/mol$
$m=0.1250\times95.21 = 11.90\ g$

Answer:

Question 1: $180.18$
Question 2: $267.74$
Question 3: $11.90$