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olga_2 [115]
3 years ago
14

What coefficient will go in the box​

Chemistry
1 answer:
xz_007 [3.2K]3 years ago
5 0

Answer:

5

Explanation:

I don't remember very thing from this unit but I believe 5 makes it possible

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How many centuries are in a foot ?
N76 [4]

Answer:

30 centimeters

Explanation:

I really hope you meant centimeters or I'm gonna look pretty dumb

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3 years ago
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Can some one plz help
blsea [12.9K]

The reaction uses B) 9.0 g Br₂.

 iron + bromine ⟶ product

2.0 g +     <em>x</em> g     ⟶   11.0 g

According to the <em>Law of Conservation of Mass</em>, the total mass of the reactants must equal the total mass of the products.

∴2.0 + <em>x</em> = 11.0

<em>x</em> = 11.0 – 2.0 = 9.0

The reaction uses 9.0 g Br₂.

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3 years ago
Choose all the answers that apply.
g100num [7]
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In science What are lithium properties
worty [1.4K]

Answer:

Lithium has a melting point of 180.54 C, a boiling point of 1342 C, a specific gravity of 0.534 20 C

Explanation:

6 0
2 years ago
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A compound has a molar mass of 92.02 grams/mole, and its percent composition is 30.4% nitrogen (N) and 69.6% oxygen (O). What is
Maru [420]

Answer:- Molecular formula is N_2O_4 .

Solution:- From given percentages We calculate the moles of N and O and then the mol ratio that gives the empirical formula of the compound. Empirical formula mass is calculated for the empirical formula and then we divide the molar mass by empirical formula mass to find out the number of empirical formula units that makes the molecular formula of the compound. empirical formula is multiplied by the number of empirical formula units. the calculations are shown below:

30.4gN(\frac{1mol}{14g}) = 2.17 mol N

69.6gO(\frac{1mol}{16g}) = 4.35 mol O

Number of moles of N are less than moles of O so we divide the moles of each by 2.17 to get the mol ratio.

N = \frac{2.17}{2.17} = 1

O = \frac{4.35}{2.17} = 2

The mol ratio of N to O is 1:2 and so the empirical formula is NO_2 .

Empirical formula mass = 14+2(16) = 14+32 = 46

number of empirical formula units = \frac{92.02}{46} = 2

So, molecular formula is two times of empirical formula that is N_2O_4 .

5 0
3 years ago
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