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3 years ago

Chemists use activity series to determine whether which type of reaction will occur?

2 answers:

5 0

Single replacement reactions. For example copper is more reactive than silver. So a copper wire in a silver solution will cause the silver to become a metal again.

olga2289 [7]3 years ago

5 0

Chemists use activity series to determine whether A SINGLE REPLACEMENT reaction will occur.

Activity series refers to a series of metals that are arranged in order of reactivity starting from the highest to the lowest. The series is used essentially to determine the products that are formed from single displacement reactions. A metal that is higher in the activity series will always replace a metal that is lower in the series if rhe two of them exist in the same solution. This is because, a metal that is higher in the series will be more reactive than a metal that is below in activity series.

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What is the mass number of 19/9F? Your answer: A. 9 B. 10 C. 19 D. 28

dexar [7]

the mass number of fluorine (F) is 19

C. 19

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3 years ago

Determine how much energy is needed to change 50 g of liquid water at 100°C to steam.

marin [14]

Answer:

$Q=113,000J$

Explanation:

Hello there!

In this case, since the vaporization process is carried out in order to turn a liquid into a gas due to the addition of heat, we can use the following heat equation involving the heat of vaporization of water or any other substance:

$Q=m*\Delta _{vap}H$

Thus, since this heat of vaporization for water is 2259.36 J/g, we plug in this amount to obtain the total energy for this process.

$Q=50*2259.36 J/g\\\\Q=113,000J$

Which is positive due to the necessity of heat.

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3 years ago

Consider the titration of 30.0 mL of 0.200 M HClO4 with 0.100 M KOH. Calculate the pH of the resulting solution after the follow

Umnica [9.8K]

Answer:

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3 years ago

You go to the same school as me BAHAHHAHA

Reptile [31]

Oh my i really hope no one from my school sees my comments

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3 years ago

You begin pouring sodium chloride into a glass of water. For a long time, the sodium chloride just dissolves in the water, but s

Gennadij [26K]

Answer:

Option D: The water is saturated

Explanation:

Solubility is the term used to designate the maximum amount of a solute that can be dissolved in a given amount of solvent, at a given temperature and pressure.

At start, you begin with pure water in the glass. This water is a pure substance, not a solution.

When you begin pouring sodium chloride into the glass of water, a solution, i.e. a homogenous mixture of solute and solvent, is formed.

This solution, at first, is diuted, which means that it contanins just few grams (matter) of the solute dissolved.

As, more sodium chloride is dissolved, the solution becomes more concentrated but is unsaturated. At some point, the water cannot dissolve more sodium chloride, because it has reached the maximum amount that can contain at that temperature and pressure. Then, the solution is saturated.

You can tell that the water is saturated, ie it contaiins the maximum amount of sodium chloride that can be dissolved, by that amount of water, at the given temperature, because from that point, you will note that as you pour more sodium chloride, it begins to pile up at the bottom of the glass. Hence, the true statement is the letter D: the water is saturated.

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3 years ago