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umka2103 [35]
2 years ago
9

Use the equation:

Chemistry
1 answer:
nadezda [96]2 years ago
8 0

Answer:

37.5 moles of O2 needed

Explanation:

2 moles of  C6H6   need   15 moles of O2

5/2  * 15 = 37.5   of O2 needed

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What are some possible ways these rocks were formed? Be sure to discuss all 3 rocks.<br> pls help me
horrorfan [7]

The brownish rock is a sedimentry rock was formed when things like sand, mud, or pebbles get laid down in layers. Eventually the layers are lithified.

The grey rock is a metamorphic rock and was when other rocks are changed because of heat or pressure. Earth movements can cause rocks to be deeply buried or squeezed. As a result, the rocks are heated and put under great pressure. They do not melt, but the minerals they contain are changed chemically, forming metamorphic rocks.

The red dots rock is an igneous rock. Igneous rock forms when hot, molten rock crystallizes and solidifies.

8 0
2 years ago
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Please comment the correct answer and I'll give you brainliest! Which atom of each pair below has the largest ionization energy?
monitta

Answer:kffffffffffffffffp;j.,,j,j[[;'/n  m

Explanation:

tggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg00000000000

6 0
2 years ago
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In oxidative phosphorylation, electrons are passed from one electron carrier to another. The energy released is used to ________
Zepler [3.9K]

Answer:

d. Form ATP during glycolysis.

Explanation:

During oxidative phosphorylation, an oxidation-reduction reactions will happen and the electrons transferred and energy released will be used in the conversion of adenosine diphosphate (ADP) into adenosine triphosphate (ATP).

This happens as a step of glycolysis, wich is the process in which the organism breaks gluscose molecules to obtain energy.

7 0
3 years ago
Iron-59 is a beta emitter with a half-life of 44.5 days. If a sample initially contains 180 mg of iron-59, how much iron-59 is l
Jobisdone [24]

Answer:

2.79 mg iron-59 is left in the sample after 267 days.

Explanation:

Given that:

Half life = 44.5 days

t_{1/2}=\frac {ln\ 2}{k}

Where, k is rate constant

So,  

k=\frac {ln\ 2}{t_{1/2}}

k=\frac {ln\ 2}{44.5}\ days^{-1}

The rate constant, k = 0.0156 days⁻¹

Using integrated rate law for first order kinetics as:

[A_t]=[A_0]e^{-kt}

Where,  

[A_t] is the concentration at time t

[A_0] is the initial concentration  = 180 mg

Time = 267 days

So,  

[A_t]=180\ mg\times e^{-0.0156\times 267}

[A_t]=180\times e^{-0.0156\times 267}\ mg

[A_t]=2.79\ mg

<u>2.79 mg iron-59 is left in the sample after 267 days.</u>

5 0
3 years ago
Which of the following does not represent a compound? <br><br> NaCl<br> N20<br> CO2<br> O2
gavmur [86]

Answer:

O2

Explanation:

A compound is made of two or more chemical elements. With that in mind, O2 is only one element: oxygen.

7 0
2 years ago
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