1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kotykmax [81]
3 years ago
9

When substances are formed that are different from the starting substances, a physical change has occurred.

Chemistry
1 answer:
makvit [3.9K]3 years ago
5 0

Answer:

is this a question?

Explanation:

You might be interested in
given a density of 350 grams/cm3 and a mass of 25 grams. What is the volume using the equation involving density?​
Eduardwww [97]

0.07cm³

Explanation:

Given parameters:

Density of the body = 350g/cm³

Mass of the body = 25g

Unknown:

Volume of the body = ?

Solution:

Density is the amount of substance contained in a volume of body. It is expressed as:

    Density = \frac{mass}{volume}

Since the unknown is volume, we make it the subject of the expression;

   Volume = \frac{mass}{density}

 Volume = \frac{25}{350} = 0.07cm³

learn more:

Density brainly.com/question/2690299

#learnwithBrainly

6 0
4 years ago
Which of the following statements is always TRUE for the freezing of water?
Rom4ik [11]

ΔG > 0 is always true for the freezing of water.

Explanation:

  • The freezing of water is only spontaneous when the temperature is fairly small. Over 273 K, the higher value of TΔS causes the sign of ΔG to be positive, and there is no freezing point.
  • The entropy decreases as water freezes. This does not infringe the Thermodynamics second law. The second law doesn't suggest entropy will never diminish anywhere.
  • Entropy will decline elsewhere, provided it increases by at least as much elsewhere.
3 0
3 years ago
The green pigment required for photosynthesis is:
katen-ka-za [31]
C. chlorophyll



gc sh jj cd dhjjfddr
7 0
3 years ago
How many moles is 1.25 x 1024 atoms of bromine?
Irina-Kira [14]

Answer:

2.08 moles (3 s.f.)

Explanation:

number of moles

= number of atoms ÷ Avogadro's constant

Avogadro's constant= 6.022 ×10²³

Thus, number of moles

= 1.25×10²⁴ ÷ (6.022 ×10²³)

= 2.08 moles (3 s.f.)

8 0
3 years ago
What three factors affect the biodiversity of an ecosystem
Korolek [52]
<span>Factors that affect biodiversity in an ecosystem include area,climate,diversity of niches,and keystone species.</span><span />
5 0
3 years ago
Read 2 more answers
Other questions:
  • If solid NaCl is added to a saturated water solution of PbCl2 at 20o C, a precipitate is formed. How would this affect the value
    5·2 answers
  • Jason is researching the dangers and benefits of nuclear power. He found the following information. Source 1: Nuclear energy red
    13·1 answer
  • Calculate the number of mg of Mn2+ left
    11·1 answer
  • If 4.35 grams of zinc metal react with 35.8 grams of silver nitrate, how many grams of silver metal can be formed and how many g
    14·1 answer
  • Why is water an effective solvent for ionic compound
    10·1 answer
  • Pick the correct answer down below
    7·2 answers
  • What components do not separate when left standing?
    13·1 answer
  • How many moles are in 82 g of water?
    8·1 answer
  • Newton determined that the attractive force between two masses was DIRECTLY proportional to:
    12·1 answer
  • Atoms have a neutral charge because they?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!