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3 years ago

11

Which process represents a chemical change?(1) melting of ice(2) corrosion of copper(3) evaporation of water(4) crystallization

of sugar

1 answer:

miskamm [114]3 years ago

3 0

(2) Corrosion of copper.
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what is the specific heat of a substance if 300 j are required to raise the temperature of a 267-g sample by 12 degrees c

slava [35]

Answer : The specific heat of the substance is 0.0936 J/g °C

Explanation :

The amount of heat Q can be calculated using following formula.

$Q = m \times C \times \bigtriangleup T$

Where Q is the amount of heat required = 300 J

m is the mass of the substance = 267 g

ΔT is the change in temperature = 12°C

C is the specific heat of the substance.

We want to solve for C, so the equation for Q is modified as follows.

$C = \frac{Q}{m \times \bigtriangleup T}$

Let us plug in the values in above equation.

$C = \frac{300J}{267g \times 12 C}$

$C = \frac{300J}{3204 g C}$

C = 0.0936 J/g °C

The specific heat of the substance is 0.0936 J/g°C

3 0

3 years ago

barxatty [35]

Answer:

it's food engineering obviously

4 0

4 years ago

No question here...............

Lady bird [3.3K]

no answer here ......

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3 years ago

If you subtract an objects starting velocity from its final velocity and divide by the time it took to change velocity, what are

amid [387]

Change in velocity over time is acceleration.

You're finding acceleration .

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3 years ago

Rhodium-101 has a half life of 3.3 years. What percent of the sample will remain after 6.6 years?

babunello [35]

Answer:

25%

Explanation:

Half life means that 50% of the sample is gone at 3.3 years. This means that an additional 3.3 years (total 6.6 years) will reduce the sample a further 50% from the point at 3.3 years. In numbers, this means 50% of 50% (0.50*0.50), which is 25%.

5 0

3 years ago