2 years ago

Which statement best describes a physical change?

Chemistry

1 answer:

worty [1.4K]2 years ago

3 0

C because it is only the chemical reaction which remain the same

You might be interested in

Elements in the same period share the same number of:

Anuta_ua [19.1K]

Answer: electron on the shell of the atom

Explanation: that what I trying to remember

7 0

2 years ago

If an object what is 30 kg of mass is moving at 10 m/s to the right how much kinetic energy does it have

ki77a [65]

Explanation:

m=30

v=10

K.E=1/2mv^2

=1/2×30×10^2

=1/2×30×100

=1500 joule

6 0

2 years ago

A compound ‘X’ is used for drinking, has pH =7.Its acidified solution undergoes decomposition in presence of electricity to prod

umka21 [38]

Answer:

X = Water (H2O) ; Y = Hydrogen ; Z = Oxygen

Explanation:

2(H2O) -------> 2H2 + O2

6 0

2 years ago

A metal cube has a mass of 20 g and a volume of 5 ml. What is the density? Is the cube made of pure aluminum? Explain your answe

Shtirlitz [24]

Explanation:

Given that,

Mass of metal cube, m = 20 g

Volume of cube, V =5 mL

We need to find the density of the cube. Mass per unit volume equals density.

$d=\dfrac{m}{V}\\\\d=\dfrac{20\ g}{5\ mL}\\\\d=4\ g/mL$

So, the density of the cube is 4 g/ml.

We know that the density of Aluminium is 4 g/mL.

So, the cube is not Aluminium cube.

3 0

3 years ago

A student wants to determine what type of cereal his classmates like best he buys three of his favorite puffed rice cereals and

kogti [31]

D. the student's conclusion shows experimental bias

4 0

3 years ago