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3 years ago

Studies reveal that during colder glacial periods, co2 levels ____ during warmer interglacial periods.

1 answer:

8 0

Studies reveal that during colder glacial periods, carbon dioxide levels were lower than during warmer interglacial periods. Glacial periods are intervals of time within an ice age that is marked by colder temperatures and glacier advances. Interglacials, on the other hand, are periods of warmer climate between glacial periods.

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A __________ is a natural or human-made body of water surrounded by land.

Sophie [7]

Answer:

Lake

Explanation:

Yeah...not much else to say honestly

5 0

3 years ago

COPY out the following sentences and fill in the gaps.

malfutka [58]

Answer:

1. Hydrogen ions; acidic

2. Alkali; hydroxide ions; alkaline

3a. Sulfuric acid --> 2 Hydrogen ions + sulfate ion

H₂SO₄ --> 2H+ + SO₄²-

3b. Sodium hydroxide --> Sodium ion + Hydroxide ion

NaOH --> Na+ + OH-

Explanation:

1. Sulfuric acid releases hydrogen ions in solution. This makes the solution acidic.

Acids produce hydrogen ions when dissolved in aqueous solutions.

2. Sodium hydroxide is an alkali. It releases hydroxide ions in solution. This makes the solution alkaline.

Alkalis are soluble bases that produce hydroxide ions in solution.

3a. Sulfuric acid --> 2 Hydrogen ions + sulfate ions

H₂SO₄ --> 2H+ + SO₄²-

The equation above is for the ionization of sulfuric acid

b. Sodium hydroxide --> Sodium ion + Hydroxide ion

NaOH --> Na+ + OH-

The equation above is for the ionization of sodium hydroxide

4 0

3 years ago

Nitrogen monoxide is produced by combustion in an automobile engine. What volume of oxygen gas is required to react completely w

Dmitrij [34]

Answer:

qwertyuiopasdfghjkl;Zxcvbnm,zxfbfa

Explanation:

5 0

3 years ago

Draw every stereoisomer for 1,2-difluoro-1,2-dimethylcyclopentane. Use wedge-and-dash bonds for the substituent groups, and be s

Blizzard [7]

Answer:

See figure 1

Explanation:

In this question, we have to find first the chiral carbons on 1,2-difluoro-1,2-dimethylcyclopentane. Carbons 1 and 2. Then, using the Cahn–Ingold–Prelog priority rules. We can draw all the stereoisomers. If we have 2 chiral carbons we will have ( $2^n=2^2=4$ ) 4 isomers. With this in mind we can have the R,R isomer; the S,S isomer; the S,R isomer, and the R,S isomer. We have to remember that:

Priority 1 = "F"

Priority 2= "C"

Priority 3= "CH2"

Priority 4 = "CH3"

I hope it helps!

7 0

3 years ago

Write down as many correct, distinct, and relevant facts you can about the following prompt: 100 mL of 1.0 M solution H2SO4 is a

galben [10]

Answer:

Explanation:

From the equation:

H2SO4(aq) + 2NaOH(aq) --> Na2SO4(aq) + 2H2O (l)

1 mole of the acid (H2SO4) and 2 moles of the base (NaOH) are required for complete neutralization.

mole of acid (H2SO4) present = molarity x volume

= 1 x 0.1 = 0.1 mole

Mole of base (NaOH) present = mass/molar mass

= 7/40 = 0.175 mole

The ratio of acid and base should be 1:2, hence the acid is slightly excessive in this case and the base is the limiting reagent that will determine the extent of the reaction.

Amount of excess acid = 0.1 - 0.175/2

= 0.0125 mole

volume of excess acid = mole/molarity

= 0.0125 x 1 = 0.0125 L

= 12.5 mL

Hence, the acid (H2SO4) was in excess by 12.5 mL.

8 0

3 years ago