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2 years ago

On a graph , which type of line shows a direct proportion?

Chemistry

2 answers:

SashulF [63]2 years ago

8 0

Answer:

Straight line.

Explanation:

On a graph a straight line shows a direct proportion relation.

The graph equation for a straight line is

y = mx + c

Where

m = slope

c= y-intercept

So here if we change "x" y will change linearly with the change.

B) a jagged line: it is a random relation between two properties

C) downward curved line: It is inverse relation with some log factor or square or other root.

D) upwardly curved line: it is direct relation with some log factor or square or other root.

svetoff [14.1K]2 years ago

5 0

C - straight line
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Oksana_A [137]

Answer:

Exothermic

Explanation:

I think it is exothermic because heat is being released

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2 years ago

Explain how temperature and precipitation are affected by latitude and the sun's rays.

Contact [7]

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2 years ago

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Consider the reaction:

murzikaleks [220]

Answer: The formation of given amount of oxygen gas results in the absorption of 713 kJ of heat.

Explanation:

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Given mass of oxygen gas = 83 g

Molar mass of oxygen gas = 32 g/mol

Putting values in above equation, we get:

$\text{Moles of oxygen gas}=\frac{83g}{32g/mol}=2.594mol$

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$2Fe_2O_3\rightarrow 4Fe+3O_2;\Delta H^o_{rxn}=+824.2kJ$

Sign convention of heat:

When heat is absorbed, the sign of heat is taken to be positive and when heat is released, the sign of heat is taken to be negative.

By Stoichiometry of the reaction:

When 3 moles of oxygen gas is formed, the amount of heat absorbed is 824.2 kJ

So, when 2.594 moles of oxygen gas is formed, the amount of heat absorbed will be = $\frac{824.2kJ}{3mol}\times 2.59mol=713kJ$

Hence, the formation of given amount of oxygen gas results in the absorption of 713 kJ of heat.

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3 years ago

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yuradex [85]

Answer:

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2 years ago

In order to complete a convection current, the rising material must eventually ____ Earth.

MissTica

Hello there.

Question: In order to complete a convection current, the rising material must eventually ____ Earth.

Answer: It is C. sink back into.

Hope This Helps You!
Good Luck Studying ^-^

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3 years ago

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