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3 years ago

The rate of chemical reactions decreases as temperature is raised. true or false

Chemistry

2 answers:

krok68 [10]3 years ago

6 0

Answer:

False

Explanation:

For most reactions, raising the temperature leads to a faster reaction/higher rate of reaction. This is because a higher temperature means that the reactant particles have a higher average kinetic energy meaning more of them have enough activation energy needed to partake in a successful collision. Not only that because they have a higher average kinetic energy they are moving faster meaning more chances of collisions

asambeis [7]3 years ago

5 0

False, the rate of chemical reactions is increased due to the higher level of kinetic energy present <span />

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In the balanced redox reaction: 2 cu(s) + s(s) ? cu2s(s), how many electrons are gained or lost by each sulfur atom?

MrRa [10]

2Cu + S = Cu₂S

S⁰ + 2e⁻ = S⁻²
Cu⁰ - 1e⁻ = Cu⁺¹

A sulfur atom gains two electrons.

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3 years ago

If a substance has a mass of 12.50 g and takes up 3.4 mL of space, what is the density?

miskamm [114]

Answer:

The answer is

Explanation:

The density of a substance can be found by using the formula

<h3> $density = \frac{mass}{volume}$ </h3>

From the question

mass of substance = 12.50 g

volume = 3.4 mL

The density of the substance is

$density = \frac{12.50}{3.4} \\ = 3.676470588...$

We have the final answer as

Hope this helps you

7 0

3 years ago

A 7.12 L cylinder contains 1.21 mol of gas A and 4.94 mol of gas B, at a temperature of 28.1 °C. Calculate the partial pressure

GenaCL600 [577]

Answer:

$P_A=4.20atm\\\\P_B=17.1atm$

Explanation:

Hello!

In this case, since the equation for the ideal gas is:

$PV=nRT$

For each gas, given the total volume, temperature (28.1+273.15=301.25K) and moles, we can easily compute the partial pressure as shown below:

$P_A=\frac{n_ART}{V} =\frac{1.21mol*0.082\frac{atm*L}{mol*K}*301.25K}{7.12L} \\\\P_A=4.20atm\\\\P_B=\frac{n_BRT}{V} =\frac{4.94mol*0.082\frac{atm*L}{mol*K}*301.25K}{7.12L} \\\\P_B=17.1atm$

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3 years ago

What are three similarities between biotic and abiotic factors?

Viktor [21]

1. Both part of the ecosystem
2. There are biotic objects on abiotic objects ( caterpillars on trees ) and abiotic objects on biotic things ( pollen on bees )
3. Both are made of atoms

6 0

3 years ago

!!NEED URGENT SCIENCE HELP!! Please help me with this I am so lost. I will mark you brainliest and like ur answer and rate it 5

Citrus2011 [14]

Answer:

1. D 2. C 3. B

Explanation:

1. The product is always what is being yielded from the equation, or what is created. Since both 4H2O and 3CO2 are created from the reactants, they are both products of the reaction.

2. The Law of Conservation of Matter states that matter cannot be created, nor destroyed. Therefore, C is not true because new atoms cannot be created in a reaction.

3. The second formula is balanced, but the first is not

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2 years ago