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3 years ago

What is the name of the state when electrons absorb energy and move to a higher energy level?

Chemistry

2 answers:

Sergeu [11.5K]3 years ago

4 0

Answer:

Excited State

Explanation:

It's when electrons absorb energy and move to a higher level.

Hoochie [10]3 years ago

4 0

Answer:

It's called excited state

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Which of the following is an oxidation-reduction reaction?

Alina [70]

Answer:

last choice

Explanation:

oxidation and reduction can be defined in terms of adding or removing oxygen to a compound

oxidation is gaining oxygen

reduction is to loss oxygen

5 0

3 years ago

Calculate ΔH for the reaction: C(graphite) + 2H 2(g) + 1/2 O 2(g) => CH 3OH(l) Using the following information: C(graphite) +

Alika [10]

Answer:

$\Delta H$ for the given reaction is -238.7 kJ

Explanation:

The given reaction can be written as summation of three elementary steps such as:

$C(graphite)+O_{2}(g)\rightarrow CO_{2}(g)$ $\Delta H_{1}= -393.5 kJ$

$2H_{2}(g)+O_{2}(g)\rightarrow 2H_{2}O(l)$ $\Delta H_{2}= (2\times -285.8)kJ$

$CO_{2}(g)+2H_{2}O(l)\rightarrow CH_{3}OH(l)+\frac{3}{2}O_{2}(g)$ $\Delta H_{3}= 726.4 kJ$

---------------------------------------------------------------------------------------------------

$C(graphite)+2H_{2}(g)+\frac{1}{2}O_{2}(g)\rightarrow CH_{3}OH(l)$

$\Delta H=\Delta H_{1}+\Delta H_{2}+\Delta H_{3}=-238.7 kJ$

4 0

3 years ago

What is the strongest evidence for hydrogen

Mumz [18]

Explanation:

4.hydrogen is able to accept or donate electrons,so it is the most versatile storm I the periodic chart

6 0

3 years ago

0.20 L of HNO3 is titrated to equivalence using 0.12 L of 0.2 M NaOH. What is the concentration of the HNO3?

AleksandrR [38]

$M_{A}V_{A}=M_{B}V_{B}\\(0.20)(M_{A})=(0.12)(0.2)\\M_{A}=\frac{(0.12)(0.2)}{(0.20)}=\boxed{0.12 \text{ M}}$

4 0

2 years ago

A manufacturer of bicycles has 4250 wheels, 2755 frames and 2255 handlebars.

Gemiola [76]

Answer:

The answer to your question is a) 2125 bicycles

c) No wheels, 630 frames, 130 handlebars.

Explanation:

Data

4250 wheels

2755 frames

2255 handlebars

- To manufacture a bicycle we need:

2 wheels x bicycle

1 frame

1 handlebar

- Divide the number of wheels

4250/ 2 = 2125 bicycles / wheels

2755 = frames

2255 = handlebars

As the number of pairs of wheels is lower than the number of frames and the number of handlebars we conclude that we can only manufacture 2125 bicycles.

No wheels

Frames = 2755 - 2125 = 630

Handlebars = 2255 - 2125 = 130

6 0

3 years ago