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Sergio039 [100]
2 years ago
12

A 67.6 g sample of zinc is heated, then placed in a calorimeter containing 65.0 g of water. Temperature of water increases from

20.00 oC to 22.50 oC. The specific heat of zinc is 0.390 J/g⋅oC. What was the initial temperature of the zinc metal sample? (final temperatures of zinc and water are the same)
Chemistry
1 answer:
alexira [117]2 years ago
7 0

Answer:

Hi Im an online tutor and i can assist you with all your assignments. We have experts in all fields. check out our website https://toplivewriters.com/

Explanation:

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2 years ago
Read 2 more answers
A student sees an absorbance a=1.140 for his solution that has a concentration of c=1.50*10-4 m using 0.50 cm cuvette. what is t
777dan777 [17]

The molar extinction coefficient is 15,200 M^{-1} cm^{-1}.

The formula to be used to calculate molar extinction coefficient is -

A = ξcl, where A represents absorption, ξ refers molar extinction coefficient, c refers to concentration and l represents length.

The given values are in required units, hence, there is no need to convert them. Directly keeping the values in formula to find the value of molar extinction coefficient.

Rewriting the formula as per molar extinction coefficient -

ξ = \frac{A}{cl}

ξ = \frac{1.140}{1.5*10^{-4}*0.5 }

Performing multiplication in denominator to find the value of molar extinction coefficient

ξ = \frac{1.140}{0.000075}  

Performing division to find the value of molar extinction coefficient

ξ = 15,200 M^{-1} cm^{-1}

Hence, the molar extinction coefficient is  15,200 M^{-1} cm^{-1}.

Learn more about molar extinction coefficient -

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6 0
1 year ago
I need help filling out nitrogen
xxMikexx [17]
For Nitrogen Atom:
Atomic Number - 7
Protons - 7
Neutrons - 8
Electrons - 7
Cation/Anion - Anion

For Nitrogen Ion:
Atomic Number - 7
Protons - 7
Neutrons - 8
Electrons - 10
Atomic Symbol - N3-
5 0
2 years ago
The periodic table is based on an element's
grin007 [14]
Well, TECHNICALLY, the periodic table is "based" upon a whole myriad of characteristics. But if you're talking about the consecutive arrangement of elements...it would be B, the atomic number.
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3 years ago
Need help with this
Evgesh-ka [11]

Answer:

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- The mitochondria produced energy/ATP

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