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Olenka [21]
3 years ago
15

The amount of a reagent present in a reaction that does not get used up is called the

Chemistry
1 answer:
timofeeve [1]3 years ago
3 0
A) Excess Reagent :)
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Describe two ways in which humans have<br> negatively affected groundwater.
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Answer: Stressors

Explanation:

it can deplete aquifers include changes in precipitation and snowmelt patterns

4 0
3 years ago
A 100g sample of Carbon-14 has a half-life of 5 years. How much Carbon-14 is left after 10 years?
attashe74 [19]

Answer: The amount of carbon-14 left after 10 years is 25 g

Explanation:

Formula used :

a=\frac{a_o}{2^n}

where,

a = amount of reactant left after n-half lives = ?

a_o = Initial amount of the reactant = 100 g

n = number of half lives =\frac{\text {given time}}{\text {half life}}=\frac{10}{5}=2

Putting values in above equation, we get:

a=\frac{100g}{2^2}

a=\frac{100g}{4}=25g

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6 0
3 years ago
Which element has a higher first ionization energy than chlorine (Cl)?
4vir4ik [10]

Answer:

Argon

Explanation:

It has more electron than chlorine

6 0
2 years ago
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A device which converts chemical energy into electric energy with brainliest
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battery

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4 0
3 years ago
Which represents the greatest time frame in which a short-term environmental change can occur?
Orlov [11]

Answer:

in days

Explanation:

A short term environmental change refers to changes in the environment that happens within a short period of time, for example, flooding, drought, volcanic eruptions etc. In contrast to short term environmental change, long term environmental change takes place over a long period of time hence species have a longer time to adapt to it. Short term environmental changes may or may not be caused by humans. An example of a short term environmental change caused by humans is oil spillage. Short term environmental changes may lead to the the migration of species from the ecosystem.

Short term environmental changes usually occur within a very short time. The greatest time frame in which a short term environmental change can occur is in a matter of days. Only longterm environmental changes span hundreds and thousands of years.

7 0
3 years ago
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