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Nat2105 [25]
4 years ago
11

Which indicator would best distinguish between a solution with pH of 7.4 and a solution of 9.2?

Chemistry
1 answer:
I am Lyosha [343]4 years ago
3 0

Answer: Big Chodes

Explanation: Big Choses make walter happy

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Which of the following is likely to be true about the ΔH for this reaction?
olya-2409 [2.1K]

Answer: Option (a) is the correct answer.

Explanation:

Enthalpy is defined as the total amount of heat present in a system.

When there is bond formation in a chemical reaction then it means energy is released. Hence, the reaction is exothermic in nature and \Delta H < 0 or negative.

On the other hand, when breaking of bonds occurs then energy is absorbed by the system. Hence, the reaction is endothermic in nature and \Delta H > 0 or positive.

Thus, in the given reaction C_{6}H_{6}(l) \rightarrow C_{6}H_{6}(s), the state is changing from liquid to solid.

This means atoms are coming close to each other and hence, there is occurrence of bond formation. As a result, energy will be released to the surroundings.

Hence, we can conclude that H < 0 for the given reaction.

6 0
4 years ago
Read 2 more answers
3. If a typical Alka-Seltzer tablet contains 2.0 g of sodium hydrogen carbonate, how many moles of carbon dioxide should one tab
seraphim [82]
Each mole of the sodium hydrogen carbonate will release one more of carbon dioxide.
Moles of NaHCO₃ = 2 / (23 + 1 + 12 + 16 x 3)
Moles of NaHCO₃ = 0.024

Moles of carbon dioxide released = 0.024
6 0
3 years ago
1pt. An atom of carbon-14 contains six protons, eight neutrons, and six electrons. Which will an atorn of carbon-12 contain?
ladessa [460]

Answer:

B. six protons, six neutrons, and six electrons

Explanation:

Carbon-14 and Carbon-12 are the isotopes of carbon.

Isotope:

An atom of an element that contain same atomic number but different atomic mass.

The difference in atomic mass is due to the different number of neutrons present, but the number protons and electrons are remain same.

In C-14 there are six protons and six electrons while number of neutrons are,

Mass number - number of protons  = number of neutrons

14- 6 =  8

In C-12 there are six protons and six electrons while number of neutrons are,

Mass number - number of protons  = number of neutrons

12- 6 =  6

Thus in C-12, there are six protons, six neutrons and six electrons present.

3 0
3 years ago
Read 2 more answers
__________ is a set of _____ or combination of __________ alleles responsible for an _________ of a trait.
Anettt [7]

Answer:

__________ is a set of _____ or combination of __________ alleles responsible for an _________ of a trait.

Explanation:

7 0
3 years ago
Why 1 mole of a gas (incompressible) contains 22400 ml of that substance?
saw5 [17]
Because that is the ideal gas at STP.
7 0
3 years ago
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