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Lady_Fox [76]
3 years ago
6

Which event must always occur for a chemical reaction to occur

Chemistry
1 answer:
Lorico [155]3 years ago
8 0
There must be effective collisions between the reacting chemical particles in order for the chemical reaction to occur.
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Naturally occurring boron has an atomic mass of 10.810 amu consists of two isotopes. One of those isotopes is 10B with an isotop
miskamm [114]

Answer:

boron has an atomic mass of 10.810 amu consists of two isotopes.

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40. Write a balanced equation and a net ionic equation for combining AgNO3(aq) and Na2CO3(aq)
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2AgNO3 (aq) + Na2CO3 (aq) --> Ag2CO3 (s) + 2NaNO3 (aq)

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For every 1.0 mole of glycine in the sample, how many molecules of methionine are present? (for help performing calculations wit
krok68 [10]

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3 years ago
Why does ice get colder when you melt it?
galina1969 [7]
It doesn't?

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8 0
3 years ago
What is the freezing point of a solution of 465 g of sucrose c12h22o11 dissolved in 575 ml of water?
Amanda [17]

Answer:

The freezing point of the solution is - 4.39 °C.

Explanation:

We can solve this problem using the relation:

<em>ΔTf = (Kf)(m),</em>

where, ΔTf is the depression in the freezing point.

Kf is the molal freezing point depression constant of water = -1.86 °C/m,

density of water = 1 g/mL.

<em>So, the mass of 575 mL is 575 g = 0.575 kg.</em>

m is the molality of the solution (m = moles of solute / kg of solvent = (465 g / 342.3 g/mol)/(0.575 kg) = 2.36 m.

<em>∴ ΔTf = (Kf)(m</em>) = (-1.86 °C/m)(2.36 m) = <em>- 4.39 °C.</em>

<em>∵ The freezing point if water is 0.0 °C and it is depressed by - 4.39 °C.</em>

<em>∴ The freezing point of the solution is - 4.39 °C.</em>

6 0
2 years ago
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