3 years ago

Which of these is an example of a chemical change?

Physics

2 answers:

xenn [34]3 years ago

5 0

Hello! B. would be an example of a chemical change.

yanalaym [24]3 years ago

4 0

the answer is a hope this helps

You might be interested in

Two boxes are 8 cm apart. Which of the following should Janet do to decrease the gravitational force between the boxes?

OlgaM077 [116]

Answer:

the answer is 2.

Explanation:

4 0

3 years ago

why does a car slide when it rolls over an icy patch on a road? A. cars have more momentum on icy surfaces. B. there is less fri

Vaselesa [24]

The answer is B
because if you compare a regular road and ice... ice is smoother and therefore has less friction

6 0

3 years ago

Read 2 more answers

The diagram below shows a model of the Earth's orbit around the Sun.

Sladkaya [172]

I would say that I and IV because summer is I and fall is IV

7 0

3 years ago

Read 2 more answers

Fill out the blanks, this is for science!

dusya [7]

Faster and higher I believe.

8 0

3 years ago

Read 2 more answers

7. A block of copper of unknown mass has an initial temperature of 65.4oC. The copper is immersed in a beaker containing 95.7g o

dolphi86 [110]

Answer:

37.34372 kg

Explanation:

m = Mass

$\Delta T$ = Change in temperature

1 denotes water

2 denotes copper

c = Heat capacity

Heat is given by

$Q=mc\Delta T$

In this case the heat transfer will be equal

$m_1c_1\Delta T_1=m_2c_2\Delta T_2\\\Rightarrow m_2=\frac{m_1c_1\Delta T_1}{c_2\Delta T_2}\\\Rightarrow m_2=\frac{95.7\times 4.18(24.2-22.7)}{0.39(65.4-24.2)}\\\Rightarrow m_2=37.34372\ kg$

Mass of copper block is 37.34372 kg

5 0

3 years ago