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GREYUIT [131]
3 years ago
15

Will mark brainliest! How many sodium atoms are there in 26.3 grams of sodium oxide (Na2O)?

Chemistry
1 answer:
SVEN [57.7K]3 years ago
8 0

Answer:

{5.11 * 10^{23} atoms Na}

Explanation:

{26.3 g} {Na_{2}O} * \frac{1 mol Na_{2}O}{61.979 g Na_{2}O} * \frac{2 mol Na}{1 mol Na_{2}O} * \frac{6.022*10^{23} atoms Na}{1 mol Na}

= {5.11 * 10^{23} atoms Na}

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Which of the following equations of CH4 + Cl2
mylen [45]

Balanced equation : C. CH₄ + 4Cl₂⇒  CCl₄+ 4HCl

<h3>Further explanation  </h3>

Equalization of chemical reactions can be done using variables. Steps in equalizing the reaction equation:  

1. gives a coefficient on substances involved in the equation of reaction such as a, b, or c, etc.  

2. make an equation based on the similarity of the number of atoms where the number of atoms = coefficient × index (subscript) between reactant and product  

3. Select the coefficient of the substance with the most complex chemical formula equal to 1  

Reaction

CH₄ + Cl₂⇒  CCl₄+ HCl

  • Give coefficient :

aCH₄ + bCl₂⇒  CCl₄+ cHCl

  • Make equation :

C, left=a, right=1⇒a=1

H, left=4a, right=c⇒4a=c⇒4.1=c⇒c=4

Cl, left=2b, right=4+c⇒2b=4+c⇒2b=4+4⇒2b=8⇒b=4

The equation becomes :

CH₄ + 4Cl₂⇒  CCl₄+ 4HCl

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