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snow_lady [41]
3 years ago
8

Newton's Third Law of Motion: "For every action there is an equal and opposite reaction." What is a force pair? Are they easy to

identify?
Chemistry
1 answer:
castortr0y [4]3 years ago
3 0

Answer:

A force pair is a couple of forces which are acting on any given body from opposite directions called action-reaction forces.

One can simply identify the force pair by identifying two objects which are interacting and by describing who is pushing whom and by identification of their drawing.

A book resting on table has two participants, a book applying force downwards due to gravity and the table pushing it away from the earth surface. These are action and reaction forces.

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What is the expected freezing point of a solution containing 85.0g NaCl dissolved in 450g of water
sattari [20]

The expected freezing point of the solution is -12.01 °C

<h3>What is the freezing point of a substance?</h3>

The freezing point of a substance is the temperature at which a liquid changes to a solid.

When solutes are dissolved in solvents, they depress the freezing point of the solvent.

The expected freezing point of the solution is calculated using the formula;

  • ΔT = K * m * i

where:

  • ΔT = freezing point depression
  • K = Freezing point constant
  • m = molality of the solution
  • i = Van't Hoff factor

For water, K =  1.86 ∘c/m

molality of solution = moles of solute/ mass of water in Kg

moles of NaCl = 85/58.5 = 1.453 moles

mass of water in kg = 450/1000 = 0.45

molality of solution = 1.453 / 0.45

molality of solution = 3.23 molal

i = 2

ΔT = 1.86 × 3.23 × 2

ΔT = 12.01

Freezing point of solution = Freezing point of water - ΔT

Freezing point of solution = 0 - 12.01

Freezing point of solution = -12.01 °C

Learn more about freezing point at: brainly.com/question/28182670

#SPJ1

8 0
1 year ago
A scientist studying stars can estimate the temperatures of stars by their?
Alex787 [66]
That answer is 2.Color
6 0
3 years ago
Name 2 animals that’s are omnivores give an example of a plant and an animal that each one might eat
denis-greek [22]

OMG THERE'S SPIDER BEHIND YOU!!! jk XD lets get back to the question.....

example of omnivores would be us humans but since you said ANIMALS then :

BEARS - bears are omnivores they feed on meat like fish and plants like grass or dandelion.

RACCOONS - their omnivores too they feed on meat like rats (ew), fish, frogs..etc they also eat plants like any kind fruit, grains, nuts ( i dont think all kind tho).

so yup those are two examples :D

6 0
4 years ago
Read 2 more answers
How large is the observable universe
Norma-Jean [14]
Here goes the question with no exact answer, lol <3


Scientists tell us that the observable universe is about 90 light years but then I wonder how they calculated that because the universe is immense!

I'm sorry but I can't go deeper into explaining as that's a tough question.
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3 years ago
La TEMPERATURA es un cambio físico o Químico?
kramer

Answer:

es un cambio fisico

Explanation:

5 0
4 years ago
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