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Nataly_w [17]
2 years ago
10

Please help me it's urgent​

Chemistry
2 answers:
Kruka [31]2 years ago
7 0
C3H8 + 5 O2 = 3CO2 + 4H20

tia_tia [17]2 years ago
3 0

Answer:

a) NaSO4+Bacl2 -> Baso4+2Nacl

b) 4C3H3+15O2 -> 12CO2+6H2O

Explanation:

The atoms at the reactants is equal with the product.

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Why the planets shine though they do not have their own light
Gnom [1K]
Planets reflect sunlight. Most planets are close enough to the sun that they can reflect its light and that is why you can see them. Some planets that are far from the sun do not light up because they have no light to reflect.

I hope this was a satisfying answer. Have a great night!
8 0
2 years ago
3. Determine the moles of sodium, Na, containing 7.9x1024 atoms.​
-BARSIC- [3]

Answer:

12.7mol Na.

Explanation:

Hello there!

In this case, according to the concept of mole, which stands for the amount of substance, we can recall the concept of Avogadro's number whereby we understand that one mole of any substance contains 6.022x10²³ particles, for the given atoms of sodium, we can calculate the moles as shown below:

7.9x10^{23}atoms*\frac{1mol}{6.022x10^{23}atoms} \\\\

Thus, by performing the division we obtain:

12.7molNa

Regards!

8 0
3 years ago
Which of the following best describes the forces that generate solar power
Sergeeva-Olga [200]
I believe the answer is A (it was on another Brainly question as well).
8 0
3 years ago
Calculate the molarity of a solution prepared by dissolving 6.80 grams of AgNO3 in 2.50 liters of solution.
tester [92]

Answer:

0.016M

Explanation:

First we find the mole of AgNO3 by using the formula mass/molar mass..

Then we find molarity by the formula mole/volume...

I hope you get this..

7 0
3 years ago
Help please due today
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The one abt respiration the answer is the first one and circulatory system is the last one that says “delivery molecules …”
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2 years ago
Read 2 more answers
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