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3 years ago

Which statement below references interactions between the geosphere, the hydrosphere and the biosphere?

Chemistry

2 answers:

erastovalidia [21]3 years ago

7 0

Ekekoskekeoejekskdodjdod

Alexxx [7]3 years ago

7 0

Answer: Plants Roots take in water through their roots.

Explanation:

Biosphere is the plant and hydrosphere is the water they take in so it has both so this is correct.

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A student titrates a 20.00 mL sample of an aqueous borax solution with 1.03 M H2SO4. If 2.07 mL of acid are needed to reach the

RSB [31]

Answer:

The concentration of the borax solution is 0.1066 M

Explanation:

Step 1: Dtaa given

Volume of a sample of aqueous borax solution = 20.00 mL = 0.020 L

Molarity of H2SO4 = 1.03 M

Volume of the H2SO4 = 2.07 mL = 0.00207 L

Step 2: The balanced equation

Na2B4O7*10H2O(borax) + H2SO4 ⇆ Na2SO4 + 4 H3BO3 + 5 H2O

Step 3: Calculate molarity of borax solution

b*Ca*Va = a * Cb*Vb

⇒with B = the coefficient of H2SO4 = 1

⇒with Ca = the concentration of borax = TO BE DETERMINED

⇒with Va = the volume of borax = 0.020 L

⇒with a = the coefficient of borax = 1

⇒with Cb = the concentration of H2SO4 = 1.03 M

⇒with Vb = the volume of H2SO4 = 0.00207 L

Ca*0.020 L = 1.03 M * 0.00207 L

Ca = (1.03 * 0.00207) / 0.020

Ca = 0.1066 M

The concentration of the borax solution is 0.1066 M

6 0

4 years ago

calculate the molality of commercial HCl solution which is 12.1Molarity, and has a density of 1.19g/mL, and is 37.2wt.%HCl.

shutvik [7]

Answer:

0.44165 Molal

8 0

4 years ago

In a 1 m solution of n2h4(aq), identify the relative molar amounts of these species.

Damm [24]

The question needs:

In a 1 M solution of N₂H₄(aq), identify the relative molar amounts of these species. from most to least...

H₂O N₂H₅⁺~OH⁻ H₃O⁺ N₂H₄

H₂O is most

second N₂H₄

N₂H₅ and OH⁻ present in equal amount

H₃O⁺ is zero

because N₂H₄ is weak base it partially ionizes in water as following:

N₂H₄ + H₂O ⇄ N₂H₅⁺ + OH⁻

5 0

3 years ago

Give the measurement following sig fig rules for tools. Do not forget the unit after your number measurement.

In-s [12.5K]

Answer:

Explanation:

You are not really helped by what is hold the liquid. Beakers and cylinders come on a lot of sizes. I hate to be crabby about things like that, but you really need to be aware that the question is slightly flawed (not your fault).

The beaker, you'd be like to get 1 sig digit. You have to be awfully careful about claiming more. So the and is 50 mL, but that mL is a guess and the 50 is not totally accurate, but what would you say the second digit is? 48 or 47? You don't really know. Maybe even 49.

The graduated cylinder is a little better. Read the bottom of the meniscus (the bottom of the 1/2 bubble). I think you can get 2 sig digs., so the answer is 36 mL. But everything also depends on what you have been told.

5 0

3 years ago

the sequence of stages an organisms go through from one generation to the next lace where an organism lives is called in

Lady_Fox [76]

Answer:

A life cycle is the sequence of stages an organisms goes through from one generation to the next. Organisms that reproduce sexually can have different types of life cycles, such as haploid or diploid life cycles.

4 0

2 years ago