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elena-14-01-66 [18.8K]

3 years ago

15

The Thompson analogy titled "The Carpet-Seed Children Analogy" attempts to deal with the issue of failed ____________________(A)

fertilization(B) intercourse(C) conception(D) contraception

1 answer:

vazorg [7]3 years ago

8 0

Answer: (D) contraception

Explanation:

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When you have asthma will there be fewer oxygen molecules in your body then normal?

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2 years ago

What is the correct IUPAC name for V(102)4?

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The IUPAC name for V(102)4 is Nobelium

Explanation:

Nobelium (No), the atomic number is 102 and it is a synthetic chemical element. Named after Alfred Nobel, who invented dynamite and it is a radioactive metal.

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3 years ago

What does one calorie do to water

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Answer:

The calorie is a unit of energy widely used in nutrition. For historical reasons, two main definitions of calorie are in wide use. The small calorie or gram calorie (usually denoted cal) is the amount of heat energy needed to raise the temperature of one gram of water by one degree Celsius (or one kelvin). The large calorie, food calorie, or kilocalorie (Cal, calorie or kcal) is the amount of heat needed to cause the same increase in one kilogram of water. Thus, 1 kilocalorie (kcal) = 1000 calories (cal). By convention in food science, the large calorie is commonly called Calorie (with a capital C by some authors to distinguish from the smaller unit). In most countries, labels of industrialized food products are required to indicate the nutritional energy value in (kilo or large) calories per serving or per weight.

Explanation:

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3 years ago

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The drain cleaner Drano contains small bits of aluminum which react with NaOH (Drano's main ingredient) to produce bubbles of hy

Serggg [28]

Answer: 0.00825 moles of hydrogen are produced.

Explanation:

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ .....(1)

For aluminium:

Given mass of aluminium = 0.150 g

Molar mass of aluminium = 27 g/mol

Putting values in equation 1, we get:

$\text{Moles of aluminium}=\frac{0.150g}{27g/mol}=0.0055mol$

The chemical equation for the reaction of aluminium and NaOH follows:

$2Al+2NaOH+6H_2O\rightarrow 2NaAl(OH)_4+3H_2$

As, given amount of NaOH is in plenty. So, it is considered as an excess reagent.

Thus, aluminium is considered as a limiting reagent because it limits the formation of product.

By Stoichiometry of the reaction:

2 moles of aluminium produces = 3 moles of hydrogen

So, 0.0055 moles of aluminium will produce = $\frac{3}{2}\times 0.0055=0.00825mol$ moles of hydrogen

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3 years ago