Nucleic acids_________? A)are energy-rich. B)are small molecules. C)store information.

Marveldude pls repost what u said it got deleted :/

ad-work [718]

Answer:

position: one compound becomes 2 separate elements

synthesis: two seperate elements combining into 1 compound

single replacement: a separate element and compound switch a component

double displacement: two compounds switch elements

this is just kinda restating what red text said but this is simpler ig

5 0

3 years ago

How much mass does 1 mol of O2 gas have?

gregori [183]

Answer:

Option A.

Explanation:

1 mol of anything contains 6.02×10²³ particles.

We know that 1 mol of oxygen gas contains 2 moles of O.

1 mol of oxygen weighs 16 g/mol, the mass for 1 molecule of O.

By the way, the mass for 1 mol of O₂ may be:

Option A → 16 g/mol . 2 mol

32 g

Oyxgen is a dyatomic molecule, that's why we have 2 moles of O.

Another example can be:

1 mol of water (H₂O) contains 2 moles of H and 1 mol of O.

4 0

3 years ago

What is the mass of 61.9 L of oxygen gas collected at STP?

Tcecarenko [31]

Answer:

D. 44.2 g O₂

General Formulas and Concepts:
Gas Laws

STP (Standard Conditions for Temperature and Pressure) = 22.4 L per mole at 1 atm, 273 K

Stoichiometry

Dimensional Analysis
Mole Ratio

Explanation:

Step 1: Define

Identify given.

61.9 L O₂ at STP

Step 2: Convert

We know that the oxygen gas is at STP. Therefore, we can set up and solve for how many moles of O₂ is present:

$\displaystyle 61.9 \ \text{L} \ \text{O}_2 \bigg( \frac{1 \ \text{mol} \ \text{O}_2}{22.4 \ \text{L} \ \text{O}_2} \bigg) = 2.76339 \ \text{mol} \ \text{O}_2$

Recall the Periodic Table (Refer to attachments). Oxygen's atomic mass is roughly 16.00 grams per mole (g/mol). We can use a mole ratio to convert from moles to grams:

$\displaystyle 2.76339 \ \text{mol} \ \text{O}_2 \bigg( \frac{16.00 \ \text{g} \ \text{O}_2}{1 \ \text{mol} \ \text{O}_2} \bigg) = 44.2143 \ \text{g} \ \text{O}_2$

Now we deal with sig figs. From the original problem, we are given 3 significant figures. Round your answer to the exact same number of sig figs:

$\displaystyle 44.2143 \ \text{g} \ \text{O} \approx \boxed{ 44.2 \ \text{g} \ \text{O}_2 }$

∴ our answer is letter choice D.

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Topic: AP Chemistry

Unit: Stoichiometry

6 0

2 years ago

A gas occupies 13.2 L at a pressure of 2.36 atm. What is the pressure of the gas if the volume is 2.13 L and the temperature rem

Wewaii [24]

Answer:

the pressure is to tight needs to be looser 13.2L of 2.36 and 2.13L

5 0

2 years ago

PLEASE HELP ME WITH THIS!!! Due in 20 minutes

grin007 [14]

4. Elements in the same group on the periodic table have the same number of valence electrons.

5. Properties of elements within a period on the periodic table change in a predictable way from one side of the table to the other.

6. The number of protons in an atom determines the identity of the element.

5 0

4 years ago

Nucleic acids_________?A)are energy-rich.B)are small molecules.C)store information.​

Nucleic acids_________?A)are energy-rich.B)are small molecules.C)store information.