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aliina [53]
3 years ago
5

HELP!! wILL GIVE BRAINLY FOR RIGHT ANSWERS!!

Chemistry
1 answer:
yarga [219]3 years ago
4 0

Answer:

yes brainly will give you the right answers

Explanation:

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17) 8.4 / 20 x 100

18) 20 . 0.5150

19) 6,50% because (as you said) the law of definite proportions states that regardless of the amount, a compound is always composed of the same elements in the same proportion by mass
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3 years ago
A shop-vac is capable of pulling in air at a rate of 210 ft/min . What is the rate of the
jonny [76]

Answer:

the answer is a shop vac is capital of pulling in air at a rate of 200

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3 years ago
Cyanogen is a gas which contains 46.2% C and 53.8% N by mass. At a temperature of 25°C and a pressure of 750 mm Hg, 1.50 g of cy
sergiy2304 [10]

Answer:

Molecular formula of cyanogen is C₂N₂

Explanation:

We apply the ideal gases law to find out the mole of cyanogen

P . V =  n. R. T

Firstly let's convert the pressure in atm, for R

750 mmHg = 0.986 atm

25°C + 273 = 298K

0.986 atm . 0.714L = n . 0.082 L.atm/mol.K .298K

(0.986 atm . 0.714L) / (0.082 L.atm/mol.K .298K) = n

0.0288 mol = n

Molar mass of cyanogen = mass / mol

1.50 g /0.0288 mol = 52.02 g/m

Let's apply the percent, to know the quantity of atoms

100 g of compound contain 46.2 g of C and 53.8 g of N

52.02 g of compound contain:

(52.02 . 46.2) / 100 = 24 g  → 2 atoms of C

(52.02 . 53.8) / 100 = .28 g  →  2 atoms of N

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Is pizza a element compound homogeneous mixture or heterogeneous mixture?
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<span> Pizza is a heterogeneous mixture Can I get Brainliest??</span>
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