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3 years ago

12

Answer this if u know science please

1 answer:

scoundrel [369]3 years ago

5 0

Answer:

1. DNA copying mistakes made during cell division, exposure to ionizing radiation, exposure to chemicals called mutagens, or infection by viruses.

2. both

Explanation: Since errors can occur when DNA replicates itself, mutations can occur in both asexually and sexually reproducing organisms.

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What are chemical reaction

scoray [572]

The reaction in which we can't take back the product to reactant form .Or in simple words the reaction which is irreversible is called chemical reaction

Example:-

Burning of wax

We cannot pull back the reaction to get wax back .

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2 years ago

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How does an exothermic change show that a chemical reaction occured?

Gre4nikov [31]

With increasing temperature of the chemical reaction

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3 years ago

What definition BEST describes a watershed?

stellarik [79]

Answer:

An area or ridge of land that separates waters flowing to different rivers, basins, or seas.

Explanation:

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3 years ago

In the following diagram, the voltage is 1.5 volts and the resistance is 7.5 ohms. Use Ohm's law to determine the current in the

maks197457 [2]

I believe it is 0.2 amps

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2 years ago

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g Ethanol boils at 78.4 °C with \DeltaΔHvap = 38.6 kJ/mol. A 0.200-mol sample of ethanol is heated from some colder temperature

andrezito [222]

Answer:

8.77 kilo Joules will be the total amount of heat required for both the heating and the vaporizing.

Explanation:

Moles of ethanol of ethanol = 0.200 mol

Heat required to heat 0.200 moles of ethanol = Q = 1.05 kJ

Enthalpy of vaporization of ethanol = $\Delta H_{vap}=38.6 kJ/mol$

Heat required to vaporize 0.200 moles of ethanol = Q'

$Q'=\Delta H_{vap}\times 0.200 mol=38.6 kJ/mol\times 0.200 mol=7.72 kJ$

Total heat required to fore heating and the vaporizing :

= Q + Q' = 1.05 kJ + 7.72 kJ = 8.77 kJ

8.77 kilo Joules will be the total amount of heat required for both the heating and the vaporizing.

7 0

3 years ago