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3 years ago

Explain why the reactivity series must be used for single replacement reactions, but not for double replacement.

Chemistry

1 answer:

Anarel [89]3 years ago

4 0

Answer:

Here's what I get

Explanation:

In a single replacement reaction, one element must displace another element from its compound.

Thus, we must consider the reactivity series, because an element lower down in the series cannot replace one that is above it.

In a double replacement reaction, the cations change partners with the anions. All we need consider are the solubilities of the new cation-anion partners.

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Melatonin has the chemical formula C13H16N2O2. Less than 10 milligrams(0.01g) Convert the melatonin to moles

oee [108]

Answer: There are 0.000043 moles of melatonin.

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number $6.023\times 10^{23}$ of particles.

To calculate the moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}$

given mass = 10 mg = 0.01 g

molar mass of $C_{13}H_{16}N_2O_2$ = 232.28 g

${\text {moles of melatonin}}=\frac{0.01g}{232.28g/mol}=0.000043moles$

Thus there are 0.000043 moles of melatonin

6 0

3 years ago

What factors does the climate include?

rosijanka [135]

Answer:

A. amount of precipitation, average temperature

Explanation:

Precipitation and average temperature are factors that climate includes. These factors are determined by other factors such as location of an area(like how far a place is from large bodies of water like the sea), ocean currents, lattitude (distance from the equator), winds (prevailing winds) , topography (such as mountains) and the like.

7 0

4 years ago

Who is generally credited with developing the process of using heat?

galina1969 [7]

Answer:

Robert Boyle

Explanation:

I think it's that

6 0

3 years ago

Josh performs an experiment to see how different brands of fertilizer will affect the growth of tomato plants. The amount of su

mestny [16]

It is A. Independent variable

5 0

3 years ago

Identify the substances in this reaction:

lukranit [14]

Answer:

is an aqueous reactant

is a liquid product

is a gaseous product

Explanation:

$H_2CO_3$ ⇔ $CO_2 + H_2O$

Hydrogen carbonate dissocates to form carbon dioxide and water. The acid (hydrogen carbonate) is in aqueous form and it dissociates to water (liquid) and carbon dioxide (a gas). It is also seen that the hydrogen carbonate is on the reactant side and it dissociates to produce water and carbon dioxide.

W $H_2CO_3$ is an aqueous reactant (a reactant undergoes changes in a chemical reaction

$H_2O$ is a liquid product (product refers to the species produced from chemical reaction)

$CO_2$ is a gaseous product

6 0

3 years ago