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2 years ago

If an electronic balance reports an object weighing 35.9920g what will be displayed when

Chemistry

1 answer:

Nat2105 [25]2 years ago

8 0

Answer:

2.0000 g

Explanation:

It will show the number out to the 4th decimal place. Exactly 2 g will be displayed as 2.0000 g.

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The specific heat of nickel is 0.44 J/g*⁰C. How much energy needed to change the temperature of 95.4g of nickel from 22⁰C to 32⁰

valentinak56 [21]

To determine the heat or energy needed for the process, we use the equation,
H = mcpdT
where m is the mass, cp is the specific heat and dT is the temperature difference.
H = (95.4g)(0.44 J/g°C)(32°C - 22°C)
= 419.76 J
Thus, the amount of heat that should be ABSORBED is approximately 419.76 J.

8 0

2 years ago

Read 2 more answers

For double-helix formation, change in Gibbs free energy, ΔG, can be measured to be −54 kJ⋅mol−1 (−13 kcal⋅mol−1) at pH 7.0 in 1

77julia77 [94]

Answer:

Explanation:

Entropy change in the system : --

ΔG = −54 kJ⋅mol−1 (−13 kcal⋅mol−1) = −54 kJ⋅mol−1 (−13 x 4.2 kJ⋅mol−1)

= - 108.6 KJ / mol

ΔH = -251 kJ/mol (-60 kcal/mol) = -251 kJ/mol (-60 x 4.2 kJ/mol)

= - 503 KJ / mol

ΔG = ΔH - TΔS

ΔS = ( ΔH - ΔG ) / T

= - 503 + 108.6 / ( 273 + 25 ) KJ / mol k⁻¹

= - 1323.48 J / mol k⁻¹

Entropy change in the surrounding

+ 1323.48 J / mol k⁻¹

7 0

2 years ago

Eugenol is a molecule that contains the phenolic functional group. Which option properly identifies the phenol in eugenol

givi [52]

Answer:

Explanation:

Hello,

Among the options given on the attached document, since phenolic functional group is characterized by a benzene ring bonded with a hydroxyl group (C₆H₅OH) we can see that the first option correctly points out such description. Thus, answer is on the second attached picture. Other options are related with other sections found in eugenol that are not phenolic.

Best regards.

3 0

2 years ago

A buffer is prepared by mixing hypochlorous acid ( HClO ) and sodium hypochlorite ( NaClO ) . If a strong base, such as NaOH , i

Dafna1 [17]

<u>Answer:</u> The balanced chemical equation is written below.

<u>Explanation:</u>

We are given:

A weak acid that is hypochlorous acid (HClO) and basic salt that is sodium hypochlorite (NaClO)

When a strong base is added to the buffer, the hydroxide ion will be neutralized by hydrogen ions from the acid.

So, the buffer component that neutralizes the additional hydroxide ions in the solution is HClO

The chemical equation for the neutralization of hydroxide ion with acid follows:

$HClO+OH^-\rightarrow H_2O+ClO^-$

Hence, the balanced chemical equation is written below.

4 0

2 years ago

If an electronic balance reports an object weighing 35.9920g what will be displayed when

Nat2105 [25]

Answer:

2.0000 g

Explanation:

It will show the number out to the 4th decimal place. Exactly 2 g will be displayed as 2.0000 g.

8 0

2 years ago