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enot [183]
3 years ago
9

Which statement describes an important role of carbon dioxide in Earth’s atmosphere? *

Chemistry
2 answers:
Leokris [45]3 years ago
8 0

Answer:

Plants use carbon dioxide to make food.

Explanation:

maw [93]3 years ago
7 0

Answer:B

Explanation: i did it

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A 825 g iron block is heated to 352 degrees C and is placed in an insulated container (of negligible heat capacity) containing 4
Stella [2.4K]

Answer : The final equilibrium temperature of the water and iron is, 537.12 K

Explanation :

In this problem we assumed that heat given by the hot body is equal to the heat taken by the cold body.

q_1=-q_2

m_1\times c_1\times (T_f-T_1)=-m_2\times c_2\times (T_f-T_2)

where,

c_1 = specific heat of iron =  560 J/(kg.K)

c_1 = specific heat of water = 4186 J/(kg.K)

m_1 = mass of iron = 825 g

m_2 = mass of water = 40 g

T_f = final temperature of water and iron = ?

T_1 = initial temperature of iron = 352^oC=273+352=625K

T_2 = initial temperature of water = 20^oC=273+20=293K

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

(825\times 10^{-3}kg)\times 560J/(kg.K)\times (T_f-625K)=-(40\times 10^{-3}kg)\times 4186J/(kg.K)\times (T_f-293K)

T_f=537.12K

Therefore, the final equilibrium temperature of the water and iron is, 537.12 K

8 0
3 years ago
Which of the following are hydrocarbons?
Elden [556K]

Answer:

B or C

Explanation:

I think it's C

8 0
2 years ago
Discussion: Bacteria vs. Virus
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What is the element with the lowest electronegativity value? A. Cesium B. Helium C. Calcium D. Fluorine
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A.) Cesium is the lowest electronegative element......
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Basically other cells
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