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Nat2105 [25]
3 years ago
13

What is the mole fraction of ethanol in a mixture of 0.25 mol of ethanol and 0.4 mol of methanol? Report your answer to the hund

reths place.
Chemistry
1 answer:
snow_tiger [21]3 years ago
6 0

Answer:

0.3846

Explanation:

i used fractions

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If a chemical reaction such as photosynthesis begins with 6 atoms of carbon C , how many atoms of carbon C should be in the prod
lara [203]

Answer:

Option B. 6 atoms of carbon

Explanation:

In <u><em>any chemical reaction</em></u>, atoms from reactant side and product side must be the same.

This is photosynthesis reaction:

6CO₂  + 6H₂O  →  C₆H₁₂O₆  +  6O₂

8 0
3 years ago
Box 1
Alex73 [517]

10g

Explanation:

Box 1, Mass of A = 10g

Box 2, Mass of B = 5g

Box 3, = 1A + 1B

Unknown:

Mass of B that would combine with mass of 20g of A

Solution:

   Mass ratio of A to B:

   \frac{mass of A}{mass of B} = mass ratio

           \frac{10}{5} = mass ratio

        The mass ratio of A to B = 2: 1

Now, number of B that will combine with 20g of A;

       

           \frac{mass of A}{mass of B} = mass ratio

               \frac{20}{mass of B} = \frac{2}{1}

                     Mass of B = 10g

10g of B would combine with 20g of A

learn more:

Rate brainly.com/question/8677367

#learnwithBrainly

7 0
3 years ago
Read 2 more answers
Calculate the specific heat of a substance when 63j of energy are transferred as heat to an 8.0 g sample to raise it temperature
Flura [38]

The formula for energy or enthalpy is:

E = m Cp (T2 – T1)

where E is energy = 63 J, m is mass = 8 g, Cp is the specific heat, T is temperature

 

63 J = 8 g * Cp * (340 K – 314 K)

<span>Cp = 0.3 J / g K</span>

6 0
3 years ago
Read 2 more answers
Answer on both of them please
aliya0001 [1]
1. Intensive.

2. Physical. 

Hope this helps. :)
3 0
3 years ago
- Which of the following is an example of physical change?
dalvyx [7]
B as the glass just changes form as it shattered but the chemical composition is same as it was before
5 0
3 years ago
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