Chemistry, 18.02.2020 00:27 larahanna

Calculate the mass of glucose C6H12O6 that contains a million ×1.0106 carbon atoms. Be sure your answer has a unit symbol if necessary, and round it to 2 significant digits.

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Answer from: awarnk

The mass of glucose that contains a million $1.0\times 10^6$ carbon atoms is $4.98\times 10^{-17} g$ .

Explanation:

Number of carbon atoms = $1.0\times 10^6$

1 molecule of glucose has 6 carbon atoms, then $1.01\times 10^6$ will be in N molecules of glucose:

$N=\frac{1.0\times 10^6}{6}$ molecules of glucose

1 mole = $N_A=6.022\times 10^{23} molecules$

Moles of glucose = n

$N=n\times N_A$

$n=\frac{N}{N_A}=\frac{\frac{1.0\times 10^6}{6}}{6.022\times 10^{23}}$

$n=2.768\times 10^{-19} moles$

Mass of $2.768\times 10^{-19}$ moles of glucose;

$2.768\times 10^{-19} mol\times 180=4.9817\times 10^{-17} g\approx 4.98\times 10^{-17} g$

Answer from: fantasticratz2

Calculate the mass of glucose C₆H₁₂O₆ that contains a million (1.0 × 10⁶) carbon atoms. Be sure your answer has a unit symbol if necessary, and round it to 2 significant digits.

The mass of glucose that contains a million carbon atoms is 5.04 × 10⁻⁷ g.

1 molecule of glucose contains 6 carbon atoms. The number of molecules of glucose that contain 1.0 × 10⁶ carbon atoms are:

$1.0 \times 10^{6}\ C\ atoms \times \frac{1\ Glucose\ molecule}{6\ C\ atoms} = 1.7 \times 10^{5} \ Glucose\ molecule$

We will convert molecules into moles using Avogadro's number: there are 6.02 × 10²³ molecules in 1 mole of molecules.

$1.7 \times 10^{5} \ molecule \times \frac{1mol}{6.02 \times 10^{23} \ molecule} = 2.8 \times 10^{-19} \ mol$

We will convert moles to mass using the molar mass of glucose (180.16 g/mol).

$2.8 \times 10^{-19} \ mol \times \frac{180.16g}{1mol} =5.04 \times 10^{-7} g$

The mass of glucose that contains a million carbon atoms is 5.04 × 10⁻⁷ g.

You can learn more about Avogadro's number here:

Answer from: Quest

the balanced equation for reaction of ca metal with o2 to produce cao is as below

2 ca+ o2→ 2 cao2

explanation

the reaction is balanced since the number of atoms in reactant side is equal to number of atoms in product side. for example they are 2 atom of ca in reactant side and 2 atoms of ca in the product side.

the process is a meet the requirement of redox reaction because : calcium is oxidized from oxidation state 0 to 2+ while oxygen is reduced from oxidation state 0 to 2-

Answer from: Quest

No table found. the question asks for covalent bond based on electronegativies

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Calculate the mass of glucose C6H12O6 that contains a million ×1.0106 carbon atoms. Be sure your ans...