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3 years ago

Which agent of erosion can create a limestone cave?

Chemistry

1 answer:

Ivanshal [37]3 years ago

5 0

Water containing carbonic acid and calcium

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What are the leaves called that provide food for a germinating

Serga [27]

Answer: Cotyledons are the first leaves to emerge from the soil when a plant germinates. Because they are part of the seed's embryo, they also are known as seed leaves, and provide nutrients to the seedling until its true leaves unfurl and begin the process of photosynthesis.

Explanation:

6 0

3 years ago

a partial grassland food web is shown. Which of the following best describes a relationship in this grassland.

vampirchik [111]

Answer:

The answer is "Upland sandpipers are primary and secondary consumers because they eat grasses and grasshoppers".

Explanation:

The limited farmland nutrition web, that reveals better which Upland sandpipers were main and secondary customers in this farmland since they eat grass with grasshoppers.

It also eat butterflies, bricks, shrimps, mollusks, worms, and nematodes, throughout contrast to bugs, which sandpipe gathers seed of hay, plants, conifers, and rice, rye, or strawberries.
Highlands dragonflies sometimes assemble in recently burnt fields with such a wealth of squirrels.

3 0

3 years ago

What is Ph of bases

lbvjy [14]

Answer:

An acid increases the hydrogen ion concentration in a solution, while a base decreases the hydrogen ion concentration. Solutions with a pH of less than seven are acidic, while those with a pH greater than seven are basic (alkaline).

Explanation:

5 0

4 years ago

Calculate the analytical and equilibrium molar concentrations of the solute species in an aqueous solution containing 155 mg of

Cloud [144]

Answer:

The analytical molar concentration is 0,04743M

The equilibrium concentrations are HA = 0,01281M; H⁺ and A⁻ = 0,03462M

Explanation:

The analytical molar concentrations is:

155mg ≡ 0,155g÷163,4g/mol = 9,486x10⁻⁴ moles

9,486x10⁻⁴ moles ÷ 0,020L = <em>0,04743 M</em>

The trichloroacetic acid [HA] dissociates in water in a 73%, thus:

HA ⇄ H⁺ + A⁻

The equilibrium concentrations are:

HA = 0,04743M ×(100-73)% = 0,01281M

H⁺ and A⁻ = 0,04743M ×73% = 0,03462M

I hope it helps!

8 0

4 years ago

The empirical formula of a compound is found to be P2O5. Experiments show that the molar mass of the compound is 426g/mol. What

yulyashka [42]

Answer:

Molecular formula = P₄O₁₀

Explanation:

Given data:

Empirical formula of compound = P₂O₅

Molar mass of compound = 426 g/mol

Molecular formula = ?

Solution:

Molecular formula:

Molecular formula = n (empirical formula)

n = molar mass of compound / empirical formula mass

Empirical formula mass= P₂O₅ = 283.89 g/mol

n = 426 g/mol / 283.89 g/mol

n = 2

Molecular formula = n (empirical formula)

Molecular formula = 2 (P₂O₅ )

Molecular formula = P₄O₁₀

5 0

3 years ago