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Slav-nsk [51]
3 years ago
10

Which of these changes is a chemical change?

Chemistry
1 answer:
Katyanochek1 [597]3 years ago
4 0
It’s d I’m pretty sure that’s correct
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If the specific heat of a material is 0.416 J/(g°C) and sample absorbs 50 J when it is heated from 30°C to 50°C what is the mass
ololo11 [35]

The mass of the sample of the material is 0.1664 g.

<h3 /><h3>What is specific heat?</h3>

The amount of energy needed to raise the temperature of one gram of a substance by one degree Celsius.

By the formula of specific heat

Q = mc \Delta T

Given, that the specific heat (c) of material is 0.416 J/gC

The difference in temperatures is 30°C to 50°C

The mass=?

Q = heat, 50 J

Putting the values in the equation

\rm 50\;J = m \times 0.416 J/g^\circ C \times (50 - 30)\\\\m = \dfrac{0.416 J/g^\circ C \times 20}{50} = 0.1664 g

Thus, the mass of the samples is 0.166 g.

Learn more about specific heat

brainly.com/question/11297584

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2 years ago
Classify each ion according to whether it's produced by an acid or by a base. Drag each ion to the correct location on the
Yanka [14]
If u suck sun I’ll show u 12.43 jp
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3 years ago
The amount of kinetic energy an object has depends on which feature of the object?
maks197457 [2]

Answer:

mass

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The amount of kinetic energy an object has, depends on its mass and its speed.

5 0
3 years ago
how does the total mass of each object increases the amount of force that is needed to get them moving at 5 m/s increase by abou
irakobra [83]

Answer:

The answer is below

Explanation:

Newton's second law of motion states that the force applied to an object is directly proportional to the rate of change of momentum with respect to time, going in the same direction as the force.

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F = d/dt(mv) = m(dv / dt) = ma; a = acceleration.

Let us assume that the object starts from rest to 5 m/s within 1 seconds, hence:

F = m(dv / dt)

200 N = m[(5 m/s - 0 m/s) / (1 s)]

200 = 5m

m = 40 kg

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3 years ago
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