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nevsk [136]
3 years ago
10

1. A pure substance is a chemical substance that has the same composition throughout. There are two

Chemistry
1 answer:
marin [14]3 years ago
3 0

Answer:

Option D. Iron and sulfur react to form iron sulfide

Explanation:

Reaction of iron with sulphur is a chemical property and not a physical property.

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How do u circulate netforce
emmasim [6.3K]

1Draw a quick sketch of the object.

2Draw an arrow showing every force acting on the object.

3To calculate the net force, add any vectors acting on the same axis (x and y), making sure to pay attention to the directions.

5 0
3 years ago
Explain how the energy of a toy car is transformed as it slides down a ramp. Give evidence that the energy of the car remains th
Sindrei [870]

Answer:

As the car starts to slide down the ramp, it is kinetic energy and when it's on the top of the ramp,  it is potential energy. We can see that the energy is now being transferred through the car and ramp.

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3 years ago
What is the study of organism at the early stages of devolopment
egoroff_w [7]

Answer: Embryology

Explanation:

6 0
3 years ago
A sample of gas occupies a volume of 350.0 mL at 840mm Hg and 33°C. Determine the volume of this sample at 600 mm By and 52°C​
insens350 [35]

Answer:

V₂ = 520.42 mL

Explanation:

Given data:

Initial volume = 350.0 mL

Initial pressure = 840 mmHg

Initial temperature = 33°C (33 +273 = 306 K)

Final temperature = 52°C (52+273 = 325 K)

Final volume = ?

Final pressure = 600 mmHg

Formula:  

P₁V₁/T₁ = P₂V₂/T₂  

P₁ = Initial pressure

V₁ = Initial volume

T₁ = Initial temperature

P₂ = Final pressure

V₂ = Final volume

T₂ = Final temperature

Solution:

V₂ = P₁V₁ T₂/ T₁ P₂  

V₂ = 840 mmHg × 350.0 mL × 325 K / 306 K × 600 mmHg

V₂ = 95550000 mmHg.mL.K /183600 K.mmHg

V₂ = 520.42 mL

7 0
2 years ago
Which statement about endothermic reactions is true?
Y_Kistochka [10]

Answer: The definition of an endothermic reaction is that the products have higher energy than the reactants, resulting in a positive enthalpy of reaction.

Explanation:

5 0
2 years ago
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