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zhannawk [14.2K]
2 years ago
13

What effect does temperature have on reaction rate?

Chemistry
1 answer:
barxatty [35]2 years ago
7 0
The answer for this multiple choice question is C



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10.0 grams of water are heated during the preparation of a cup of coffee 1.0x 103 j of the heat are added to the water. which is
nirvana33 [79]

<u>Answer:</u> The final temperature of the coffee is 43.9°C

<u>Explanation:</u>

To calculate the final temperature, we use the equation:

q=mC(T_2-T_1)

where,

q = heat released = 1.0\times 10^3J=1000J

m = mass of water = 10.0 grams

C = specific heat capacity of water = 4.184 J/g°C

T_2 = final temperature = ?

T_1 = initial temperature = 20°C

Putting values in above equation, we get:

1000J=10.0g\times 4.184J/g^oC\times (T_2-20)\\\\T_2=43.9^oC

Hence, the final temperature of the coffee is 43.9°C

8 0
3 years ago
Please help, chemistry is kicking me!
Natali [406]

Answer:

Sorry I would bu that looks so hard

Explanation:

5 0
3 years ago
Given, 2Ca + O2 -&gt; 2CaO, what is the 2 located in front of calcium called??
EleoNora [17]
Moles used to react
3 0
3 years ago
A mixture of propane and butane is burned with pure oxygen. The combustion products contain 46.7 mole% H2O. After all the water
wlad13 [49]

Answer:

28%

Explanation:

Basically, all o did was write the equations, balance it and solve for them. Also, at the place I stared, I used simultaneous equation to solve it. Multiplying by 8 and also 3.

It's a pretty straightforward question.

At the final step that's missing, I Did

(y)C3H8 = 2.8 / ( 2.8 + 7.1)

(y)C3H8 = 0.28

5 0
2 years ago
If the ratio of the length of a rectangle to its width is 3 to 2, what is the
borishaifa [10]

Answer:

Length of a rectangle whose width is 4 inches is

<u>6 inches</u>

Explanation:

Ratio of length  to its width is 3 to 2

Let length  = L

Let Width  = B

L: B = 3 : 2 (given)

\frac{L}{B} =\frac{3}{2}

Width ,B = 4

Insert  B in above equation

\frac{L}{B} =\frac{3}{2}

\frac{L}{4} =\frac{3}{2}

cross multiply,

L = \frac{3}{2}\times4

L = 6 inches

Conversion(if required) ,

1 inch = 2.54 cm

6 inch = 2.54 (6)

L = 15.24 cm

8 0
2 years ago
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