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notka56 [123]
2 years ago
9

TIMED TEST PLS HELP (will give BRAINLIEST) According to some scientists, which is a cause of global warming? PICK ONLY ONE A) de

crease of nitrous oxide B) increase in cloud cover C) decrease of methane gas D) increase in carbon dioxide
Chemistry
2 answers:
mash [69]2 years ago
8 0
The answer is C, hope you have a nice day and hope this helps
artcher [175]2 years ago
7 0
I think its c maybe im not sure
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2 years ago
What is the final temperature of the solution formed when 1.52 g of NaOH is added to 35.5 g of water at 20.1 °C in a calorimeter
Inessa [10]

Answer : The final temperature of the solution in the calorimeter is, 31.0^oC

Explanation :

First we have to calculate the heat produced.

\Delta H=\frac{q}{n}

where,

\Delta H = enthalpy change = -44.5 kJ/mol

q = heat released = ?

m = mass of NaOH = 1.52 g

Molar mass of NaOH = 40 g/mol

\text{Moles of }NaOH=\frac{\text{Mass of }NaOH}{\text{Molar mass of }NaOH}=\frac{1.52g}{40g/mole}=0.038mole

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

44.5kJ/mol=\frac{q}{0.038mol}

q=1.691kJ

Now we have to calculate the final temperature of solution in the calorimeter.

q=m\times c\times (T_2-T_1)

where,

q = heat produced = 1.691 kJ = 1691 J

m = mass of solution = 1.52 + 35.5 = 37.02 g

c = specific heat capacity of water = 4.18J/g^oC

T_1 = initial temperature = 20.1^oC

T_2 = final temperature = ?

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

1691J=37.02g\times 4.18J/g^oC\times (T_2-20.1)

T_2=31.0^oC

Thus, the final temperature of the solution in the calorimeter is, 31.0^oC

4 0
3 years ago
A 500 gram price of metal has a volume of 2.75. What is the density
Oxana [17]
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 However, since Volume is the missing component in the equation. Mass of an object is divided by its density to get its volume. V = M / D

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<span>Volume of Iron Pyrite nugget = 50 g </span>/ <span>5.0g/cm3    = </span>10cm3

4 0
3 years ago
A red-hot piece of iron is set on a metal workbench. A student says that it transfers heat to the bench and the air by conductio
Alecsey [184]
<span>The metal also gives off heat in the form of radiation. 

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5 0
3 years ago
Read 2 more answers
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