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3 years ago

The process by which ice widens and deepends cracks in rock is called

Chemistry

1 answer:

sertanlavr [38]3 years ago

6 0

The process by which ice widens and deepens cracks in rock is called Ice welding.

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What is the chemical equation for the alpha decay of erbium-144

iren [92.7K]

Answer:

Er-144 -------> Dy-140 + He-4

Explanation:

Alpha decay is the release of a hydrogen nucleus. So the original atom will decrease the mass by 4 and the atomic number by 2.

8 0

3 years ago

Give the four symbols for physical states of reactants and products, and tell what each means.

pshichka [43]

We are going to use table salt, NaCl as an example.

(s) = solid, eg the salt you put on your food is a crystalline solid.
(l) = liquid, if you melt salt it take on a liquid form
(g) = gaseous, if you put enough energy in the salt will turn into a gas.
(aq) = aqueous, meaning in water or another solvent. If you put some table salt in water and stir it, it will dissolve, the NaCl molecules dont get destroyed but they dissolve becoming part of the liquid.

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2 years ago

How many molecules are in 4.0 mol h20

Leona [35]

4 moles of water will have 4 number of water molecules

7 0

2 years ago

How do I classify elements the way that the periodic table was classified?

natita [175]

The question doesn't really make sense, but I am pretty sure the answer is atomic number.

4 0

2 years ago

It takes 42.25 ml of 0.0500 M Na2S2O3 solution to completely react with the iodine present in a 150.0 ml iodine solution. How ma

svlad2 [7]

Answer:

There were 0.268 grams I2 present

Explanation:

Step 1: Data given

Volume of Na2SO3 = 42.25 mL = 0.04225 L

Molarity of Na2SO3 = 0.0500 M

Volume of iodine = 150.0 mL

Step 2: The balanced equation

I2 + 2 Na2SO3 → Na2S2O6 + 2 NaI

Step 3: Calculate moles of Na2SO3

Moles Na2SO3 = molarity * volume

Moles Na2SO3 = 0.0500 M * 0.04225 L

Moles Na2SO3 = 0.0021125 moles

Step 4: Calculate moles I2

For 1 mol I2 we need 2 moles Na2SO3

For 0.0021125 moles Na2SO3 we have 0.00105625

Step 5: Calculate mass of I2

Mass I2 = moles * molar mass

Mass I2 = 0.00105625 * 253.8 g/mol

Mass I2 = 0.268 grams

There were 0.268 grams I2 present

3 0

3 years ago

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