All categories

4 years ago

True or False: Changes in states of matter indicate a chemical change.

Chemistry

2 answers:

777dan777 [17]4 years ago

7 0

False, changes in matter indicate a physical change.

andreyandreev [35.5K]4 years ago

5 0

Answer:

False

Explanation:

Changes in state of matter indicates a physical change. Always remember these learning tools:

For Physical Changes:

S - Size, Shape, State

For Chemical Changes:

Odor Color Bubbles/Gas Light Temperature Precipitate

Ol' Country Boys/Girls Like Their Pickups

Hope this helps!!!❤️

You might be interested in

Help thank you so so much!

Otrada [13]

Answer:

D is the answer to this problem

8 0

3 years ago

The wastewater in your home goes to one of three places. It can run into a home septic system, it can go to a centralized sewage

NemiM [27]

Answer:

Explanation:

5 0

3 years ago

Read 2 more answers

What are some facts about animal cells

11111nata11111 [884]

Compared to plant cells, which are shaped somehow like a box, animal cells are round and circular.

I hope this helps, please Brainliest me, and have a great day! :D

3 0

3 years ago

Read 2 more answers

Calculate the number of hydrogen atoms present in 40g of urea, (NH2)2CO

tekilochka [14]

Answer: There are $16.14 \times 10^{23}$ atoms of hydrogen are present in 40g of urea, $(NH_{2})_{2}CO$ .

Explanation:

Given: Mass of urea = 40 g

Number of moles is the mass of substance divided by its molar mass.

First, moles of urea (molar mass = 60 g/mol) are calculated as follows.

$Moles = \frac{mass}{molar mass}\\= \frac{40 g}{60 g/mol}\\= 0.67 mol$

According to the mole concept, 1 mole of every substance contains $6.022 \times 10^{23}$ atoms.

So, the number of atoms present in 0.67 moles are as follows.

$0.67 mol \times 6.022 \times 10^{23} atoms/mol\\= 4.035 \times 10^{23} atoms$

In a molecule of urea there are 4 hydrogen atoms. Hence, number of hydrogen atoms present in 40 g of urea is as follows.

$4 \times 4.035 \times 10^{23} atoms\\= 16.14 \times 10^{23} atoms$

Thus, we can conclude that there are $16.14 \times 10^{23}$ atoms of hydrogen are present in 40g of urea, $(NH_{2})_{2}CO$ .

7 0

3 years ago

A mercury barometer is an instrument in which the weight of a column of mercury in a glass tube with a sealed top is balanced ag

Arte-miy333 [17]

Answer:

h = 0.346 m

Explanation:

mercury barometer:

Pa = ρgh

∴ Pa = 0.455 atm = 46102.875 Pa = 46102.875 Kg/ms²

∴ ρ = 13600 Kg/m³

∴ g = 9.80 m/s²

⇒ h = (46102.875 Kg/ms²) / (13600 Kg/m³ )(9.80 m/s²)

⇒ h = 0.346 m

7 0

4 years ago