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S_A_V [24]
3 years ago
9

Can someone please answer this and if you dont know dont answer (:

Chemistry
2 answers:
anyanavicka [17]3 years ago
8 0

Answer:  1- Alkali metals

                2- Noble gases

                3- Halogens

Explanation:

Softa [21]3 years ago
8 0

Answer:

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Explanation:

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When might a plot of ln[a] vs time not yield a straight line?
podryga [215]
Considering a reaction:
A → B
The rate equation may be described as:
r = -k[A]ⁿ
Taking the natural log,
ln(r) = -nln([A]) + ln(k)
Therefore, the only time the graph of ln[A] vs time will be a straight line is when the order of the reaction is 0, meaning the reaction is independent of reactant concentration.
6 0
4 years ago
Calculate the percent yield of a reaction where a student collected 16.8 grams of product and was expecting to collect 49.7 gram
masya89 [10]

Answer:

\boxed{\text{33.8 \%}}

Explanation:

\text{\% yield} = \dfrac{\text{actual yield}}{\text {theoretical yield}} \times\text{100 \%}

Data:

        Actual yield = 16.8 g

Theoretical yield = 49.7 g

Calculation:

\text{\% yield} = \dfrac{\text{16.8 g}}{\text {49.7 g}} \times\text{100 \%} = \boxed{\textbf{33.8 \%}}

8 0
3 years ago
Which of the following is considered a nucleon?
Nookie1986 [14]
All of the above . ......
4 0
3 years ago
Question: Which is the last step in excavation of the skeletal remains?
Kay [80]

Answer: B:

Explanation:

This is the most reasonable answer

5 0
3 years ago
Read 2 more answers
Mercuric oxide (HgO) is heated and forms liquid mercury (Hg) and oxygen (O2) gas. How would you characterize this reaction?
My name is Ann [436]

Answer:

Decomposition reaction.

Explanation:

Decomposition reaction -

It is the type of reaction, where a single entity breaks down into various products under the influence of some external factors , like heat and sunlight , is referred to as a decomposition reaction.

From the question,

The reaction is -

2 HgO  →  2 Hg + O₂

Hence ,

A single compound HgO breaks down to two entities , i.e. , Hg and  O₂.

             

7 0
4 years ago
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