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3 years ago

A 10 gram iron nail absorbed 125J of heat. What was the final temperature of the nail if the original temperature was 25°C?

Chemistry

1 answer:

valentina_108 [34]3 years ago

7 0

Answer:

52.1 degrees C

Explanation:

We need to use the equation: q = mCΔT, where m is the mass in grams, C is the specific heat capacity, and ΔT is the change in temperature.

Here, m = 10 g and q = 125 J. The heat capacity of iron is about 0.461 J/(g * C). And, our initial temperature is 25. So:

125 J = (10 g) * (0.461 J/(g * C)) * (T_f - 25)

Solving for T_f (final temp), we get: 52.1 degrees C

Hope this helps!

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Answer:

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Explanation:

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2 years ago

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2 years ago

Balancing Chemical Equations Worksheet

Goshia [24]

The balanced chemical equation of the reactions given is as follows:

2LiHCO3 -----> Li2CO3 + H2O + CO2
2 N2 + 5 O2 -----> 2 N2O5
MgBr2 + KOH -----> KBr + Mg(OH)2
Mn + 2 CuCl -----> 2 Cu + MnCl2
8 Zn + S8 -----> 8 ZnS
2 NaOH + H2SO4 -----> 2 H2O + Na2SO4
2 K + 2 H2O -----> 2 KOH + H2
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Balancing of chemical equations is the process of adding numerical coefficients in front of moles of reactants and products to ensure that the moles of atoms of elements of the reactants is equal to the moles of atoms of products formed.

The balanced chemical equation of the reactions given is as follows:

2LiHCO3 -----> Li2CO3 + H2O + CO2
2 N2 + 5 O2 -----> 2 N2O5
MgBr2 + KOH -----> KBr + Mg(OH)2
Mn + 2 CuCl -----> 2 Cu + MnCl2
8 Zn + S8 -----> 8 ZnS
2 NaOH + H2SO4 -----> 2 H2O + Na2SO4
2 K + 2 H2O -----> 2 KOH + H2
C5H12 + 8 O2 -----> 6H2O + 5 CO2
2 KOH + H2CO3 -----> 2 H2O + K2CO3
C4H802 + 6 O2 -----> 4 H20 + 4 CO2
16 Al + 3 S8 ---> 8 Al2S3

Learn more about balancing of chemical equations at: brainly.com/question/15428811

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2 years ago

You dissolve the sample of fd&c red 40 (molar mass 496.4200 g/mol) in enough water to make 250.0 ml of solution. we call thi

icang [17]

Molar mass 496.4200 g/mol

Number of moles:

40 g x 1 mol / 496.4200 => 0.08057 moles

Volume in liters:

250.0 mL / 1000 => 0.25 L

Therefore:

M = moles / V

M = 0.08057 / 0.25

= 0.32228 M

hope this helps!

8 0

3 years ago

Please answer this time without just getting points D.

xz_007 [3.2K]

D is the answer here look

4 0

2 years ago