What is a physical change

Chemistry

2 answers:

xxMikexx [17]3 years ago

8 0

cutting a piece of paper

Explanation:

Goryan [66]3 years ago

3 0

Answer:

A physical change occurs when a substance changes, but no new substance is formed.

Explanation:

You might be interested in

Can somebody help me

Anastaziya [24]

It would be:
2H2 + O2 -> 2H2O

5 0

3 years ago

a swimming pool is 50 meters long. each day a swimmer swam total of 75 lengths of the pool for practice. how many kilometers did

Brilliant_brown [7]

50x75=3750 -- metres per day
3750x15=56250 -- metres in 15 days

Divide by 1000 to convert to km
56.250km
<u>56.25km</u>

8 0

3 years ago

Which best explains why the atomic theory is a scientific one?

atroni [7]

Answer:

Explanation:

7 0

3 years ago

Read 2 more answers

What mass of iodine would react with 48 grams of magnesium to make magnesium iodide? Mg + I2 -> MgI2

mrs_skeptik [129]

1) Chemical equation:

Mg + I2 ---> Mg I2

2) molar ratios

1 mol Mg : 1 mol I2 : 1 mol Mg I2

3) Calculate the number of moles of Mg in 48 grams

Atomic mass of Mg: 24.3 g/mol

number of moles = mass in grams / atomic mass = 48 g / 24.3 g/mol = 1.975 mol Mg

4) Use a proportion with the molar ratios

1 mol I2 / 1 mol Mg = x / 1.975 mol Mg =>

=> x = 1 mol I2 * 1.975 mol Mg / 1 mol Mg = 1.975 mol I2

5) Convert 1.975 mol I2 to grams

molar mass of I2 = 2 * 126.9 g/mol = 253.8 g/mol

mass = number of moles * molar mass = 1.975 mol * 253.8 g/mol = 501.255 g

Answer: 501 grams

6 0

3 years ago

Fill in the blank in order to complete the path for pollen as it fertilizes a plant:anther → stigma --> style → _____________

jek_recluse [69]

The path taken by pollen as it fertilizes a plant would be:

anther ---> stigma ---> style ---> ovule

The fertilization process in plant starts by pollination. Pollen grains move from the anther of a flower to the stigma of the same or different flower. On the stigma, the pollen germinates and the cells of the pollen tube grows through the style to reach the ovule.

The generative cell of the pollen travel through the pollen tube to reach the embryo sac of the ovule. The cell divides by mitosis to form sperm cells and one of the sperm cells fertilizes the egg cell to form the zygote.

More on pollination can be found here: brainly.com/question/10482635

5 0

2 years ago