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3 years ago

Concentration and temperature, are factors that affect rate of

Chemistry

2 answers:

Oduvanchick [21]3 years ago

8 0

Answer:

Affects the rate of energy in enzymes

Ghella [55]3 years ago

4 0

<h2>Answer:</h2><h2>Are factors that affect the rate of diffusion.</h2><h2>Hope I'm right s brainiest please</h2>

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W myFLVS

bazaltina [42]

Answer:

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Explanation:

5 0

4 years ago

Is mixing butter, granulated sugar, and brown sugar until it's creamy a physical or chemical change and why

Nadusha1986 [10]

Answer:

Physical

Explanation: Because it says "Until creamy" meaning you're changing the look, not the way it reacts with each other.

8 0

3 years ago

Read 2 more answers

By increasing the length of heat exchanger, the effectiveness and cold stream output temperature of the heat exchanger

Dominik [7]

Answer:

Effectiveness and cold stream output temperature of the heat exchange Increases. So, Answer is b) Increases.

Explanation:

We have a heat exchanger, and it is required to compare the effectiveness and cold stream output if the length is increased.

Heat exchangers are engineering devices used to transfer energy. Thermal energy is transferred from Fluid 1 - Hot fluid (HF) to a Fluid 2 - Cold Fluid (CF). Both fluids 1 and 2 can flow with different values of mass flow rate and different specific heat. When the streams go inside the heat exchanger Temperature of Fluid 1 (HF) will decrease, at the same time Temperature of the Fluid 2 (CF) will increase.

In this case, we need to analyze the behavior taking into account different lengths of heat exchangers. If the length of the heat exchanger increases, it means the transfer area will increases. Heat transfer will increase if the transfer area increases. In this sense, the increasing length is the same than increase heat transfer.

If the heat transfer increases, it means Fluid 1 (HF) will reduce its temperature, and at the same time Fluid 2 (CF) will increase its temperature.

Finally, Answer is b) Effectiveness and cold stream output temperature increases when the length of the heat exchanger is increased.

5 0

3 years ago

Which equation correctly relates the heat of reaction to the standard heats of formation?

VARVARA [1.3K]

Answer:

Explanation:

∆H° = ∆Hf ° (products) – ∆Hf ° (reactants)

4 0

3 years ago

Which compounds are lewis acids? select all that apply. (ch3ch2)2hc+ cl3c− ch3nh2 bbr3?

alexandr402 [8]

The Lewis acids are electron pair acceptors due to the availability of vacant orbitals they accept electrons from the donor compounds.

$(CH_3CH_2)_2CH^{+}$ is a Lewis acid due to the unfilled valence shell on carbon atom (possessing positive charge) it accepts electron readily.
$CCl_{3}^{-}$ is not a Lewis acid due to the presence of negative charge which represents that there are electrons available for donation.
$CH_3NH_2$ is not a Lewis acid due to the presence of lone pair on nitrogen which is easily donated to the acceptors.
$BBr_3$ is a Lewis acid due to the availability of vacant p-orbital on boron atom.

Hence, $(CH_3CH_2)_2CH^{+}$ and $BBr_3$ are Lewis acids.

3 0

3 years ago