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3 years ago

PLEASE explain your answer!!!!

Chemistry

1 answer:

Aleks04 [339]3 years ago

6 0

Answer:

Explanation: confusing

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Pls help me with this atomic number worksheet I will make you the brainiest worth 25 points

ELEN [110]

Answer:

HELLO THERE!

I HOPE MY ANSWER WILL HELP YOU :)

Explanation:

PLEASE NOTE; I HAVE WRITTEN THE ATOMIC NUMBER IN BRACKETS, NEXT TO THE SYMBOL OF THE ELEMENT

7 0

2 years ago

If the lab technician needs 30 liters of a 25% acid solution, how many liters of the 10% and the 30% acid solutions should she m

Mice21 [21]

Answer:

7.5 L of the 10% and 22.5 L of the 30% acid solution, she should mix.

Explanation:

Let the volume of 10% acid solution used to make the mixture = x L

So, the volume of 30% acid solution used to make the mixture = y L

Total volume of the mixture = x + y = 30 L .................. (1)

For 10% acid solution:

C₁ = 10% , V₁ = x L

For 30% acid solution :

C₂ = 30% , V₂ = y L

For the resultant solution of sulfuric acid:

C₃ = 25% , V₃ = 30 L

Using

C₁V₁ + C₂V₂ = C₃V₃

10×x + 30×y = 25×30

So,

x + 3y = 75 .................. (2)

Solving 1 and 2 we get,

x = 7.5 L

y = 22.5 L

6 0

2 years ago

How many moles of O₂ are needed to react completely with 35.0 mol of FeCl₃? *

densk [106]

Answer:

26.3 moles of O₂ are needed to react completely with 35.0 mol of FeCl₃

Explanation:

To determine the number of moles of O₂ that are needed to react completely with 35.0 mol of FeCl₃, it is possible to use the reaction stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), and rule of three as follows: if 4 moles of FeCl₃ react with 3 moles of O₂, 35 moles of FeCl₃ with how many moles of O₂ will it react?

$molesofO_{2} =\frac{35 moles of FeCl_{3}*3 moles of O_{2} }{4 moles of FeCl_{3}}$

moles of O₂= 26.25 ≅ 26.3

26.3 moles of O₂ are needed to react completely with 35.0 mol of FeCl₃

7 0

2 years ago

On a phrase diagram or heating curve, the freezing point is the same as what ?

yuradex [85]

Answer:

Pelting point.

Explanation:

Freezing point is the same is the melting point.

8 0

2 years ago

How to do lewis dot structure of nh3conh3

wlad13 [49]

Answer:

i'm not really sure i cant help today try a different question that i can help u with

Explanation:

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2 years ago

PLEASE explain your answer!!!!​

PLEASE explain your answer!!!!