melting, boiling, and bending are considered physical changes, but burning is a chemical change. explain why this is so.

1 answer:

8 0

<span>So, when you make something boiling or melting, its still the same substance. Water doesn't change into something else, just change its state of matter. When you burn something, one substance reacts with another. For example, when you burn carbon in oxygen, you get carbon dioxide. That's the difference.</span>

You might be interested in

True or false. elements in the same period have the same number of valence electrons

saul85 [17]

False. elements in the same period have the same number of shells while elements in the same group have the same number of valence electrons.

4 0

3 years ago

2. What is the mass of 16.3 L of helium gas?

lilavasa [31]

(16.3 L) / (22.414 L/mol) x (4.0026 g He/mol) = 2.91 g

3 0

2 years ago

Read 2 more answers

65 g of hydrogen chloride (hcl) is dissolved in water to make 5.0 l of solution. what is the ph of the resulting hydrochloric ac

sashaice [31]

65 grams of HCl = 65/36.5 moles of HCl = 1.78 moles
1.78 moles of HCl dissolved to make a 5 litres of solution has a concentration of 1.78/5 = 0.36 mol/dm^3 (Note: 1 litre = 1 cubic decimetre)

In a strong acid, such as HCl, [H+] = [acid], so [H+] = 0.36

To calculate pH, we have to take the negative logarithm of the concentration of protons

So, -log(0.36) = 0.45

Hope I helped!! xx

7 0

3 years ago

I will make you brainiest! In this analogy, which part of the lunar cycle is waning - from the new moon to the full moon or the

Veronika [31]

Answer:

Explanation:

After the glorious appearance of Full Moon, the lunar shape starts to wane, meaning it gets smaller. It's visible later at night and into the early morning, and we see a steadily shrinking shape of the lunar surface that's being lit up.

7 0

2 years ago

Balancing word equation can someone help me 7 to 12

GuDViN [60]

Hi Student,

Soory for not answer there but I needed help from someone , can you inbox me please !!

I am a Indian and I come there for seeing education system in your country. please, can you provide me some help ?

My Account name is jaiveersingh70 in Indian server of brainly. you can check my identity.

if you have not inbox power, So tell your friend about me and ask for inbox.

Thank You :)

Ex - Stars Team

jaiveersingh70

5 0

2 years ago