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
Delicious77 [7]
3 years ago
9

Which of the following is true about mixtures and compounds? A compound forms when different substances chemically combine to fo

rm a new substance. A mixture contains different substances that are not chemically combined with one another. Mixtures and compounds are both made of two or more different substances. all of these
Chemistry
2 answers:
Musya8 [376]3 years ago
6 0
All of these are true
Monica [59]3 years ago
3 0
All of them are true.
You might be interested in
A match has about 21 milligrams of red phosphorus coating the tip. How many atoms of phosphorus is this?
MAXImum [283]

Answer:

4.083 * 10^20 atoms.

Explanation:

One Mole of phosphorus  contains 6.022 * 10^23 atoms (Avogadros number)'

Since 1 mole of Phosphorus  has a mass of  30.974 grams, 21 milligrams has

6.022 * 10^23  * 0.021 / 30.974

= 0.004083 * 10^23

= 4.083 * 10^20

3 0
3 years ago
Interpolate: Use the equation to determine what the student enrollment in 2003 likely was.
sdas [7]

Answer:

1244 students

Explanation:

That would be y = 82*3 + 998

= 1244.

5 0
3 years ago
Read 2 more answers
Boiling is an example of a physical property. How do the particles of gas compare to the particles as a liquid?
Stolb23 [73]
Particles of gas are more scarcely placed  as compared to that of liquid.

the intermolecular forces will be less in gaseous state and hence is less stable
7 0
3 years ago
Read 2 more answers
A certain substance melts at a temperature of . But if a sample of is prepared with of urea dissolved in it, the sample is found
pshichka [43]

Answer:

2.2 °C/m

Explanation:

It seems the question is incomplete. However, this problem has been found in a web search, with values as follow:

" A certain substance X melts at a temperature of -9.9 °C. But if a 350 g sample of X is prepared with 31.8 g of urea (CH₄N₂O) dissolved in it, the sample is found to have a melting point of -13.2°C instead. Calculate the molal freezing point depression constant of X. Round your answer to 2 significant digits. "

So we use the formula for <em>freezing point depression</em>:

  • ΔTf = Kf * m

In this case, ΔTf = 13.2 - 9.9 = 3.3°C

m is the molality (moles solute/kg solvent)

  • 350 g X ⇒ 350/1000 = 0.35 kg X
  • 31.8 g Urea ÷ 60 g/mol = 0.53 mol Urea

Molality = 0.53 / 0.35 = 1.51 m

So now we have all the required data to <u>solve for Kf</u>:

  • ΔTf = Kf * m
  • 3.3 °C = Kf * 1.51 m
  • Kf = 2.2 °C/m
5 0
3 years ago
The factor that affects how easy and electron can be removed from an Atom is the
zheka24 [161]
The ionization energy
3 0
3 years ago
Other questions:
  • What mass of water must be added to 5g of nacl to make 5% mass persentage of the solution?
    6·1 answer
  • Harry Hess’s explained how oceanic crust is produced and destroyed in his theory of _______
    11·1 answer
  • How would the consumption of antacid (sodium bicarbonate) affect urine pH?
    6·1 answer
  • Which of the following is equal to 2.3 cm3?
    9·1 answer
  • Adding a(n) [Select]<br> ' will slow down a chemical reaction.
    10·1 answer
  • Which of these forces is acting on a baseball sitting on level ground? A. applied force B. frictional force C. gravitational for
    8·2 answers
  • How do sediments become<br> sedimentary rock?
    8·1 answer
  • How many moles of calcium nitrate could be produced from 8.64 moles of calcium hydroxide
    8·1 answer
  • The opposite of an endothermic reaction is a(n) reaction.​
    7·2 answers
  • How many grams of Mg0 are produced from 9.7g of MG
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!