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2 years ago

If the Earth had no tilt, how would that affect our seasons? I will give branliest to first comment

Chemistry

1 answer:

Aleks [24]2 years ago

6 0

Answer:

in my opinion it wouldn't be regular seasons like what we have now it would be equal in every poles .. there would not be ice in North. [its my opinion though] sorry if I am wrong

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Bromine (63 g) and fluorine (60 g) are mixed to give bromine trifluoride. a) Write a balanced chemical reaction. b) What is the

fiasKO [112]

Answer:

a) Br2 + 3F2 → 2BrF3

b) Br2 is the limiting reactant.

c) There will be formed 86.3 grams of BrF3

d) There will remain 0.326 moles of F2 = 12.97 grams

Explanation:

Step 1: The balanced equation

Br2 + 3F2 → 2BrF3

Step 2: Given data

Mass of Bromine = 63grams

Mass of fluorine = 60 grams

percent yield = 80%

Molar mass of bromine = 79.9 g/mol =

Molar mass of fluorine = 19 g/mol

Molar mass of bromine trifluoride = 136.9 g/mol

Step 3: Calculating moles

Moles Br2 = 63 grams / (2*79.9)

Moles Br2 = 0.394 moles

Moles F2 = 60 grams / (2*19.9)

Moles F2 = 1.508

For 1 mole Br2 consumed, we need 3 moles of F2 to produce 2 moles of BrF3

Br2 is the limiting reactant. It will completely be consumed (0394 moles).

There will react 3*0.394 = 1.182 moles of F2

There will remain 1.508 - 1.182 = 0.326 moles of F2 = 12.97 grams

Step 5: Calculate moles of BrF3

For 1 mole Br2 consumed, we need 3 moles of F2 to produce 2 moles of BrF3

So there is 2*0.394 moles = 0.788 moles of BrF3 moles produced

Step 6: Calculate mass of BrF3

mass = Moles * Molar mass

mass of BrF3 = 0.788 moles * 136.9 g/mol = 107.88 grams = Theoretical yield

Step 7: Calculate actual yield

% yield = 0.80 = actual yield / theoretical yield

actual yield = 0.80 * 107.88 grams = 86.3 grams

actual yield = 86.3 grams

7 0

2 years ago

A cylinder with a mass of 98 grams is made of copper (density 8.94 g/cm³). If the radius of the cylinder is 2.0 cm, what is the

sasho [114]

The height of the described cylinder is 0.85 cm

Mass= 98g

Density= 8.9g/cm^3

Density= (mass/volume)

Substitute the values

8.94= 98/ volume

Volume= $\frac{98}{8.94}$

Volume= 10.97 $cm^{3}$

Volume of a cylinder can be found with (V = π r 2 h.)

h= height of cylinder ?

radius= 2cm

Substitute the values

10.97= π × $2^{2}$ × h

h= 10.97/12.57

h= 0.85 cm

Therefore, height of the described cylinder is 0.85 cm

Learn more at : brainly.com/question/21667661?referrer=searchResults

7 0

2 years ago

Elaborate the reason that the heat of vaporization of water is so much greater than its heat of fusion. A) The potential energy

Olenka [21]

I believe the answer is B. Liquid water is stabilized by strong inter-molecular forces between the molecules. This is why the energy needed to completely separate the molecules converting to gas is much greater than that of converting a solid into liquid. The latent heat of vaporization will have to be higher for the liquid to become a gas.

5 0

3 years ago

What criteria are used to distinguish between a chemical and physical change?

abruzzese [7]

You can reverse the change in a chemical change but you can't in a physical change

5 0

2 years ago

How many kilojoules of heat are absorbed when 1.00 L of water is heated from 18°C to 85°C? (Specific heat capacity of water is 4

lord [1]

ANSWER: 280.06 kilojoules.

EXPLANATION:

Heat absorbed can be calculated from the equation Q = m . C . ΔT

where m = mass of substance in grams

C = specific heat capacity of substance in J/g°C

ΔT = temperature difference.

So, to calculate heat absorbed by water we must know three terms, mass of water, specific heat capacity of water and temperature difference.

Have a look at question, Specific heat capacity of water, C = 4.18 J/g°C.. Temperature difference is, ΔT = (85 - 18) °C = 67 °C. Mass of water is not given, instead we are given volume of water = 1 L and density of water = 1 g/mL. So we need to calculate mass of water from volume and density.

We know the formula, density is mass upon volume. see pic for calculation. mass of water comes out to be 1000 g.

So, now we know m = 1000 g, C = 4.18 J/g°C and ΔT = 67 °C.

Use, Q = m . C . ΔT to calculate heat absorbed.

Q = 1000 g . 4.18 J/g°C . 67 °C = 280060 J.

The answer comes out be in units of Joules but we need answer in kilojoules so divide the answer by 1000(thousand).

answer will be 280.06 kilojoules.

4 0

3 years ago