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2 years ago

Why do we use the metric system in science?

1 answer:

8 0

we use the metric system in science just for the simple fact that it is a common unit practice around the world. in science we must use the same system, because it would cause confusion or mistakes.

hope this helps good luck! :)

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Tierra is playing in her backyard when she hears her friend calling out to her. She can't see her friend but can hear her friend

mixer [17]

Answer:

diffraction

Explanation:

the correct answer is diffraction

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3 years ago

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Round off the following number to 3 digits 34,560

Vikki [24]

Answer:

3.46x10⁴

Explanation:

Hello,

In this case, we can see that the number 34,560 has five significant figures, it means that if we want to write it with three, we must take the 3, 4 and 5 only. Nevertheless, since the 6 after the five is greater than 5, we can round such five to 6, so we obtain:

346

However, the decimal places cannot get lost, therefore, we move the given thousand to the three, so the number turns out:

3.46x10⁴

Best regards.

6 0

3 years ago

What is the enthalpy of formation (?H?f) of NaHCO3(s) from its constituent elements.

vova2212 [387]

Answer:

Enthalpy of formation = -947.68KJ/mol

Explanation:

Enthalpy of formation is the heat change when one mole of a substance is formed from its element in its standard states and in standard conditions of temperature and pressure. it may be positive or negative, if positive, it is an endothermic reaction where the heat content of the product is greater than that of the reactants, and if negative, it is exothermic reaction - where the heat content of the reactants is greater than the products. the enthalpy of formation is measured in KiloJoule/Moles (KJ/Mole).

From the value of the enthalpy of formation of NaHCO3, it shows that the reaction is exothermic, that is the formation of NaHCO3 from its constituents elements. As such, the heat content of the reactants is greater than the products.

The step by step explanation is shown in the attachment.

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3 years ago

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Where did the longest tsunami form?

max2010maxim [7]

July 9, 1958: in Lituya Bay<span>, Alaska was caused by a landslide triggered by an 8.3 magnitude earthquake.</span>

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3 years ago

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Give four reasons why afertile soil is not necessarily productive

abruzzese [7]

Answer:

During cellular respiration animal cells combine oxygen with food molecules to release energy to live and function. Remember that cellular respiration produces carbon dioxide as a waste product. Animals use energy to grow, reproduce, and to function. They release the carbon dioxide into the air as a waste product

Explanation:

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3 years ago