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prisoha [69]
3 years ago
15

Which of the following is not a compound?

Chemistry
1 answer:
ICE Princess25 [194]3 years ago
7 0

Chocolate cookies are not a compound?

You might be interested in
7. How many moles of mercury(ii) oxide, hgo, are needed to produce 12. 5 g of oxygen, o2? 2 hgo(s) --->2 hg(l) o2(g)
svetoff [14.1K]

Moles are the division of the mass and the molar mass. The moles of mercury (ii) oxide in the decomposition reaction needed to produce oxygen are 0.781 moles.

<h3>What is a decomposition reaction?</h3>

A decomposition reaction is a breakdown of the reactant into simpler products. The decomposition of mercury (ii) oxide can be shown as:

2HgO(s) → 2Hg(l) + O₂(g)

From the reaction, it can be said that 2 moles of mercury (ii) oxide decomposes to produce 1 mole of oxygen.

The moles of oxygen that needs to be produced are calculated as:

Moles = mass ÷ molar mass

= 12.5 gm ÷ 32 gm/mol

= 0.39 moles

0.39 moles of oxygen are needed to be produced.

From the stoichiometric coefficient of the reaction, the moles of HgO is calculated as: 2 × 0.39 = 0.781 moles

Therefore, 0.781 moles of HgO are required in the reaction.

Learn more about moles here:

brainly.com/question/3801333

#SPJ4

5 0
1 year ago
A piston in a heat engine does 500 joules of work, and 1400 joules of heat are added to the system. Determine the change in inte
san4es73 [151]

Answer : The change in internal energy is, 900 Joules.

Solution : Given,

Heat given to the system = +1400 J

Work done by the system = -500 J

Change in internal energy is equal to the sum of heat energy and work done.

Formula used :

\Delta U=q+w

where,

\Delta U = change in internal energy

q = heat energy

w = work done

As per question, heat is added to the system that means, q is positive and work done by the system that means, w is negative.

Now put all the given values in the above formula, we get

\Delta U=(+1400J)+(-500J)=900J

Therefore, the change in internal energy is 900 J.

The change in internal energy depends on the heat energy and work done. As we will change in the heat energy and work done, then changes  will occur in the internal energy. Hence, the energy is conserved.

8 0
3 years ago
This type of radiation is smallest and highest in energy
Pavel [41]

As your question is vague, I am assuming that you are talking Alpha, Beta and Gamma radiation. Out of these three radiation, Gamma radiation is the smallest in size compared to Alpha or Beta, but it has the highest energy levels. Gamma radiation is also known as photons. In other words, photons are light particles.

5 0
3 years ago
When we touch a Van de Graaff generator, our hair may stand up if it is dry. This happens only if the strands of our hair
prisoha [69]
The answer is B) repel each other because you are gaining a positive charge and that is not a answer is leave repel each other.
3 0
3 years ago
Read 2 more answers
The cis configuration has the substituted groups on opposite side of the double bond
rewona [7]

Answer:

False.

Explanation:

Hello there!

In this case, according to the attached picture, it is possible for us to evidence that cis- isomers have the substituted groups on the same side of the double bond whereas the trans- isomers have the substituted groups on the opposite side of the double bond.

In such a way, we infer that the given statement is FALSE, because that is the definition for the trans configuration.

Regards!

7 0
2 years ago
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