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
olga55 [171]
2 years ago
10

I need help with this some people say they know D is right giving brainliest if u get it right TWO ANSWERS

Chemistry
2 answers:
lisabon 2012 [21]2 years ago
6 0

Answer: C and A

Explanation: because there are undersea volcanoes so that mean there at the very bottom and its covered with trees that means there talking about coral reefs

MAXImum [283]2 years ago
3 0

Answer:

I think its D. and A hopefully that's right

You might be interested in
Is cool-aid a element ,compound or mixture?
Cerrena [4.2K]
Kool-aid is a mixture.
6 0
3 years ago
Read 2 more answers
Which scientist established the law of octaves ?
goblinko [34]

the answer is D. John Newlands <3

5 0
3 years ago
Read 2 more answers
An atom has 6 electrons in its outer orbit. It will most likely form an ion with a charge of:
GenaCL600 [577]

Answer:

c

Explanation:

4 0
2 years ago
2) Write a hypothesis for the Observation and question below. Be sure to use the proper “If…, then…” format in your answer. Iden
Anna [14]

Answer:

If one astronaut used more force, then that one would be faster than the other. The independent variable is force. The dependent variable is speed.

Explanation:

Force is what is to be changed. Speed is what is being measured.

IV = Changed/factor DV=Measured/Changes by factor

4 0
3 years ago
A gas used to extinguish fires is composed of 75 % CO2 and 25 % N2. It is stored in a 5 m3 tank at 300 kPa and 25 °C. What is th
tatyana61 [14]

Answer : The partial pressure of the CO_2 in the tank in psia is, 32.6 psia.

Explanation :

As we are given 75 % CO_2 and 25 % N_2 in terms of volume.

First we have to calculate the moles of CO_2 and N_2.

\text{Moles of }CO_2=\frac{\text{Volume of }CO_2}{\text{Volume at STP}}=\frac{75}{22.4}=3.35mole

\text{Moles of }N_2=\frac{\text{Volume of }N_2}{\text{Volume at STP}}=\frac{25}{22.4}=1.12mole

Now we have to calculate the mole fraction of CO_2.

\text{Mole fraction of }CO_2=\frac{\text{Moles of }CO_2}{\text{Moles of }CO_2+\text{Moles of }N_2}

\text{Mole fraction of }CO_2=\frac{3.35}{3.35+1.12}=0.75

Now we have to calculate the partial pressure of the CO_2 gas.

\text{Partial pressure of }CO_2=\text{Mole fraction of }CO_2\times \text{Total pressure of gas}

\text{Partial pressure of }CO_2=0.75mole\times 300Kpa=225Kpa=225Kpa\times \frac{0.145\text{ psia}}{1Kpa}=32.625\text{ psia}

conversion used : (1 Kpa = 0.145 psia)

Therefore, the partial pressure of the CO_2 in the tank in psia is, 32.6 psia.

3 0
3 years ago
Other questions:
  • Consider the following equilibrium: H2CO3+H2O = H3O+HCO3^-1. What is the correct equilibrium expression?
    10·1 answer
  • Which physical method can separate a mixture of steel ball bearings and marbles ?
    6·2 answers
  • What is the molarity of 2.50 mol in a 1000 ml solution? *
    8·1 answer
  • Which pair shares the same empirical formula?
    8·1 answer
  • A student mixes a solution of lead (II) nitrate with a solution of potassium iodide and notices the formation of a yellow solid.
    8·1 answer
  • Which place would have the most air pressure
    9·2 answers
  • Does this seem correct for a chemical equation explaining fireworks.
    15·1 answer
  • _____of gas molecules with an object is the cause of<br> pressure by a gas.
    7·2 answers
  • What role does the grass play in the food web?
    5·1 answer
  • 5. For the following reaction:
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!