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2 years ago

A blank cell has half the chromosomes of a blank cell

Chemistry

1 answer:

Vladimir [108]2 years ago

6 0

The answer to this is Haploid and Meiosis. I think

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A chromate ion consist of four oxygen atom bonded to be a chromium atom. It has two extra electrons. the formula for this

natali 33 [55]

Answer:

Cr04^2-

Explanation:

6 0

2 years ago

Which term refers to an electrochemical cell that produces an electric current?

ArbitrLikvidat [17]

Correct answer: Galvanic cell

Reason:
Following are the differences between Galvanic cell and electrolytic cell:
1. Galvanic cell converts chemical energy into electrical energy , on other hand electrolytic cell converts electrical energy into chemical energy.
2. In galvanic cell, redox reaction is spontaneous and is responsible for the production of electrical energy. in electrolytic cell, the redox reaction is not spontaneous and electrical energy has to be supplied to initiate the reaction.

Thus, galvanic cell refers to an electrochemical cell that produces an electric current

8 0

3 years ago

A store has notebooks worth $1.60. The store adds a 30% markup. How much is the markup?

Hoochie [10]

Answer: $0.48

Explanation: $1.60×0.30= 0.48

6 0

3 years ago

Which form of energy is produced by an exothermic reaction?

WINSTONCH [101]

Electromagnetic Energy

7 0

3 years ago

Describe in detail how to prepare 500.0 mL of a 2.5 M calcium chloride solution. Calcium chloride is purchased as a solid. TO pi

antoniya [11.8K]

Answer:

In a volumetric flask of marking 500.0 mL add 138.75 grams of calcium chloride and add small amount of water to dissolve solute completely. After the solute gets completely soluble add more water up till the mark of 500 ml.

Explanation:

Concentration of calcium chloride = 2.5 M

Volume of the solution = 500.0 ml = 0.5000 L

Moles of calcium chloride = n

$c=\frac{n}{V(L)}$

n = moles of solute

c = concentration of solution

V = volume of the solution in L

$2.5 M=\frac{n}{0.5000 L}$

$n=2.5 M\times 0.5000 L = 1.2500 mol$

$n=\frac{\text{Mass of calcium chloride}}{\text{Molar mass of calcium chloride}}$

$1.2500 mol=\frac{\text{Mass of calcium chloride}}{111 g/mol}$

Mass of calcium chloride = 111 g/mol × 1.2500 mol = 138.75 g

In a volumetric flask of marking 500.0 mL add 138.75 grams of calcium chloride and add small amount of water to dissolve solute completely. After the the solute gets completely soluble add more water up till the mark of 500 ml.

4 0

3 years ago