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
Naddik [55]
3 years ago
7

Which type of molecule forms structures in cells and stores energy? (5 points)

Chemistry
1 answer:
Brums [2.3K]3 years ago
4 0
Just to make sure I’m right, is number 1 miss spelled??
You might be interested in
I have 2 samples of solid chalk (aka calcium carbonate). Sample A has a total mass of 4.12 g and Sample B has a total mass of 19
IRINA_888 [86]

Answer:

A) Sample B has more calcium carbonate molecules

Explanation:

M = Molar mass of calcium carbonate = 100.0869 g/mol

N_A = Avogadro's number = 6.022\times 10^{23}\ \text{mol}^{-1}

For the 4.12 g sample

Moles of a substance is given by

n=\dfrac{m}{M}\\\Rightarrow n=\dfrac{4.12}{100.0869}\\\Rightarrow n=0.0411\ \text{mol}

Number of molecules is given by

nN_A=0.0411\times 6.022\times 10^{23}=2.48\times 10^{22}\ \text{molecules}

For the 19.37 g sample

n=\dfrac{19.37}{100.0869}\\\Rightarrow n=0.193\ \text{mol}

Number of molecules is given by

nN_A=0.193\times 6.022\times 10^{23}=1.16\times 10^{23}\ \text{molecules}

1.16\times 10^{23}\ \text{molecules}>2.48\times 10^{22}\ \text{molecules}

So, sample B has more calcium carbonate molecules.

The ratio of the elements of carbon, oxygen, calcium atoms, ions, has to be same in both the samples otherwise the samples cannot be considered as calcium carbonate. Same is applicable for impurities. If there are impurites then the sample cannot be considered as calcium carbonate.

7 0
3 years ago
Which of the following is true of the water molecule?
Yuki888 [10]
The Answer To This Is B.
7 0
3 years ago
What part of the sun do we see from earth?
NISA [10]

Answer:

photosphere

Explanation:

photosphere

There are 3 main layers of the Sun that we can see. They are the photosphere, the chromosphere and the corona. Together they make up the "atmosphere" of the Sun. The part of the Sun that glows (and that we see with the naked eye) is called the photosphere

8 0
3 years ago
Read 2 more answers
Which describes how technology has changed society?
Anton [14]

Answer:

B. People live longer than they used to

Explanation:

None of the other answers are correct.

7 0
3 years ago
What is the most likely type of bond formed between element x and iodine?
Tanzania [10]
The most likely bond between element X and Iodine would be an ionic, or electrovalent, bond. Iodine has seven electrons in its outer shell, also known as the valence shell. To become perfectly stable, it needs only a single electron from another element. Hence no sharing of electron takes place (usually), which is the condition required for it to be covalent bonding. Hence it's most likely an ionic bonding/
5 0
3 years ago
Other questions:
  • If you have a electromagnet how many it’s magnetic field stronger
    12·1 answer
  • What volume will 35.9 g of hydrogen gas (H2) occupy at STP?
    11·2 answers
  • What does this “e” mean in science atoms molecules etc etc
    11·1 answer
  • Using the appropriate conversion factor from the first part, convert 0.600 mil potassium chlorate to grams.
    11·1 answer
  • The law of definite proportions helps us explain why water will always        A. break down into gas when heated.   B. be releas
    6·2 answers
  • When balancing a redox reaction, you are balancing
    8·2 answers
  • A train travels 380 miles in 5 hours 15 minutes. Calculate its<br> average speed.
    13·1 answer
  • Oxygen's atomic number is 8. This means that an oxygen atom has
    7·2 answers
  • What is a common use of nitric acid?
    12·2 answers
  • Name the two criteria that is used to determine if a substance is pure or not​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!