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3 years ago

How many grams are in 1.3 moles of Cr?

Chemistry

2 answers:

Verizon [17]3 years ago

6 0

Answer:

40.38 grams

Explanation:

BaLLatris [955]3 years ago

6 0

1.3 moles * 51.9961 grams = 155.9883

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Radon-222 is a radioactive gas with a half-life of 3.82 days. How long would it take for fifteen-sixteenths of a sample of radon

Fittoniya [83]

Use the formula in terms of half life from the normal exponential functions

N(t) = N(0) (1/2) ^ (t/thalf) 

N(0) is the original quantity 

N(t) = quantity remaining at time t 

t is the time 


thalf is half life 

1/16 = (1/2)^(t/3.82) 

16 = 2^(t/3.82) 

4 = t/3.82 

t = 15.28 days

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8 0

3 years ago

Fill in the coefficients that will balance the following reaction:

vfiekz [6]

6NaC₂H₃O₂ + Fe₂O₃ → 2Fe(C₂H₃O₂)₃ + 3Na₂O

Explanation:

Given equation;

NaC₂H₃O₂ + Fe₂O₃ → Fe(C₂H₃O₂)₃ + Na₂O

To find the coefficient that will balance this we equation, let us set up simple mathematical algebraic expressions that we can readily solve.

Let us have at the back of our mind that, in every chemical reaction, the number of atom is usually conserved.

aNaC₂H₃O₂ + bFe₂O₃ → cFe(C₂H₃O₂)₃ + dNa₂O

a, b, c and d are the coefficients that will balance the equation.

conserving Na; a = 2d

C: 2a = 6c

H: 3a = 9c

O; 2a + 3b = 6c + d

Fe: 2b = c

let a = 1

solving:

2a = 6c

2(1) = 6c

c = $\frac{2}{6} = \frac{1}{3}$

2b = c

b = $\frac{1}{2} x \frac{1}{3}$ = $\frac{1}{6}$

d = 2a + 3b - 6c = 2(1 ) + (3 x $\frac{1}{6}$ ) - (6 x $\frac{1}{3}$ ) = $\frac{1}{2}$

Now multiply through by 6

a = 6, b = 1, c = 2 and d = 3

6NaC₂H₃O₂ + Fe₂O₃ → 2Fe(C₂H₃O₂)₃ + 3Na₂O

learn more:

Balanced equation brainly.com/question/9325293

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6 0

3 years ago

Monochlorination of propane yields two constitutional isomers, and dichlorination yields four. Trichlorination yields five const

GaryK [48]

By Tri chlorination, three chlorine atoms can replace the 3 hydrogen atoms in propane molecule to give tri-chlorinated products according to the attached picture.

6 0

4 years ago

Read 2 more answers

Name the functional group in the following molecule: H-C(Triple Bond)C-CH2CH3

Dima020 [189]

Here is your answer

Since, carbon atoms are triple bonded.

So functional group present in the compound is ALKYNE

HOPE IT IS USEFUL

3 0

3 years ago

How many molecules are there in 79g of Fe2O3?

weqwewe [10]

There are approximately 160 grams in 1 mol of fe203 molecules therefore there would be 79/160 = 0.49375 mols of fe203 molecules in 79 grams therefore 5 atoms in total for each molecule of fe203 therefore 79/160 *5 =79/32=2.46875 mols in atoms

6 0

3 years ago