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o-na [289]
3 years ago
15

Which increases the rate of a chemical reaction?

Chemistry
1 answer:
Anastasy [175]3 years ago
3 0
A catalyst

A catalyst can be in many forms
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Speed is the ratio between distance and <br><br> Pls answer ASP!!
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Answer: Explanation: Speed is simply velocity without a specified direction (speed is the magnitude of the velocity vector). Regardless of the two measurements, they both relate distance to time, but are slightly different. Instantaneous speed is the derivative of the total distance covered with respect to time.

Explanation: I hope this helps!

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As Matter Changes States of matter does chemical composition stay the same or not
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Whether water is frozen, in a gaseous state, or is a liquid, it is still H2O. So the chemical composition does stay the same.
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3 years ago
How much heat is absorbed/released when 20.00 g of NH3(g) reacts in the presence of excess O2 (g) to produce NO (g) and H2O (l)
FrozenT [24]

Answer:

a. 342.9 kJ of heat are absorbed.

Explanation:

Calculation of the moles of NH_3 as:-

Mass = 20.00 g

Molar mass of NH_3 = 17.031 g/mol

The formula for the calculation of moles is shown below:

moles = \frac{Mass\ taken}{Molar\ mass}

Thus,

Moles= \frac{20.00\ g}{17.031\ g/mol}

Moles= 1.1743\ mol

Given that:- \Delta H=+1168\ kJ

It means that 1 mole of NH_3 undergoes reaction and absorbs 1168\ kJ of heat

So,

1168 mole of NH_3 undergoes reaction and absorbs 1168\times 1168\ kJ of heat

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Effects of warm tropical waters meeting with cool air.
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A hurricane.. I believe
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Which of the following solutions would have the lowest freezing point?
Paul [167]

B. 3.0 mol·L⁻¹ NaCl

Explanation:

Freezing point is a colligative property: it depends only on the number of particles in solution.

The for freezing point depression ΔT_f is

ΔT_f = iK_fb

where

i = the number of moles of particles available from one mole of solute

K_f = the molal freezing point depression constant

b = the molal concentration of the solute

All your solutions are aqueous NaCl. They differ only in their concentrations.

Thus, the most concentrated solution will have the greatest freezing point depression and the lowest freezing point.

Read more on Brainly.com - brainly.com/question/11516173#readmore

4 0
3 years ago
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