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
dexar [7]
3 years ago
7

Which statements describe the death of stars? Check all that apply.

Chemistry
2 answers:
baherus [9]3 years ago
6 0

Answer:

a,b

Explanation:

Sveta_85 [38]3 years ago
5 0

Answer:A and B

Explanation:a stats final stages of life depend on its mass and stars die when they run out of fuel

You might be interested in
What is the volume of 0.640 grams of Oz gas at Standard Temperature and Pressure (STP)?
Ilia_Sergeevich [38]

Answer: The volume of 0.640 grams of O_{2} gas at Standard Temperature and Pressure (STP) is 0.449 L.

Explanation:

Given: Mass of O_{2} gas = 0.640 g

Pressure = 1.0 atm

Temperature = 273 K

As number of moles is the mass of substance divided by its molar mass.

So, moles of O_{2} (molar mass = 32.0 g/mol) is as follows.

No. of moles = \frac{mass}{molar mass}\\= \frac{0.640 g}{32.0 g/mol}\\= 0.02 mol

Now, ideal gas equation is used to calculate the volume as follows.

PV = nRT

where,

P = pressure

V = volume

n = no. of moles

R = gas constant = 0.0821 L atm/mol K

T = temperature

Substitute the values into above formula as follows.

PV = nRT\\1.0 atm \times V = 0.02 mol \times 0.0821 L atm/mol K \times 273 K\\V = 0.449 L

Thus, we can conclude that the volume of 0.640 grams of O_{2} gas at Standard Temperature and Pressure (STP) is 0.449 L.

6 0
3 years ago
True or false(Internal forces act on the outside of an object, and external forces act within an object.)
kkurt [141]
False I’m not sure exactly
4 0
2 years ago
One of the most difficult solar energy design problems to solve is:
Sonja [21]
I'm not sure but i would say C.storing the heat energy.
6 0
3 years ago
Read 2 more answers
three molecules of oxygen react with four molecules of hydrogen to produce water molecules write a balanced chemical equation
mixer [17]

Answer:

ExpC

H

4

+  

2

O

2

 

→

 

C

O

2

+  

2

H

2

O

This is the balanced reaction equation for the combustion of methane.

Explanation:

The Law of Conservation of Mass basically states that matter can neither be created nor destroyed. As such, we must be able to show this in our chemical reaction equations.

If you look at the equation above, you'll see an arrow that separates the reaction equation into two parts. This represents the direction of the reaction.

To the left of the arrow, we have our reactants.

To the right of the arrow, we have our products.

The quantity of each individual element in the left must equal the quantity of each individual element in the right.

So if you look below, you'll see the unbalanced equation, and I'll try to explain how to balance the reaction.

C

H

4

+  

O

2

 

→

 

C

O

2

+  

H

2

O

Our reactants in this equation are  

C

H

4

and  

O

2

.

Our next step is to break these down into individual atoms.

We have:

1 C atom, 4 H atoms & 2 O atoms.

If you're confused by this, look to see the little number to the bottom right of each element, the subscript, and it tells you how many of each atom are in the molecule. Make sense?

Now we look to the other side of the equation.

Here we see our products are  

C

O

2

+  

H

2

O

Again, we break these down into individual atoms again.

We have:

1 C atom, 2 H atom, 3 O atom

6 0
2 years ago
Would fire extinguishers that produce Carbon Dioxide (CO) gas be more effective in
yarga [219]

Answer:

They would be more efficient in ground fires since carbon dioxide is much greater in mass then oxygen, so its affected by gravity .

Explanation:

7 0
3 years ago
Other questions:
  • A student collected the data shown in the table below during an experiment.
    9·1 answer
  • What is the morality of a 750.0 milliliter solution containing 2.5 miles of solute??
    6·1 answer
  • A gas that has a volume of 28 liters, a temperature of 45C, And an unknown pressure has its volume increased to 34 liters and it
    8·1 answer
  • The melting point of unknown substance A is 15°C and its boiling point is 95°C. Sketch a
    12·1 answer
  • An electrically neutral atom of oxygen has eight electrons. What other facts do you know for sure about this atom? 1.) there are
    9·2 answers
  • The __________ is the part of the solution that is in the greater quantity, and the __________ is the smaller portion of the sol
    9·2 answers
  • What happens when you combine ammonia and formaldehyde?
    6·1 answer
  • All + HgCl, --------> AICI,
    9·1 answer
  • Which of the following contains the most atoms?
    10·1 answer
  • Math is hard don’t report me I have a question
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!