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GREYUIT [131]
3 years ago
9

Which staternent is true for balanced chermical equations?

Chemistry
1 answer:
maw [93]3 years ago
8 0

Answer:

true

Explanation:

i took the test

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When a 500. gram sample of water at 19.0oC absorbs 8.40 kiloJoules of heat, the temperature of the water will change to?
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i think the answer is c

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4 years ago
Which set of elements represents a period within the Periodic Table?
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Which set of elements represents a period within the Periodic Table?


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3 years ago
What is the h2 h2o molar ratio??
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3 years ago
What is the freezing point of a solution in which 2.50 grams of sodium chloride are added to 230.0 ml of water
labwork [276]

The freezing point of a solution in which 2.5 grams of NaCl is added t0 230 ml of water is :  - 0.69°C

<h3>Determine the freezing point of the solution </h3>

First step : Calculate the molality of NaCl

molality =  ( 2.5 grams / 58.44 g/mol ) / ( 230 * 10⁻³ kg/ml )

              = 0.186  mol/kg

Next step : Calculate freezing point depression temperature

T = 2 * 0.186 * kf

where : kf = 1.86°c.kg/mole

Hence; T = 2 * 0.186 * 1.86 = 0.69°C

Freezing point of the solution

Freezing temperature of solvent - freezing point depression temperature

                                               0°C  -  0.69°C = - 0.69°C

Hence the Freezing temperature of the solution is  - 0.69°C

Learn more about The freezing point of a solution in which 2.5 grams of NaCl is added t0 230 ml of water is :  - 0.69°C

8 0
2 years ago
How many protons and electrons do the following ion have?
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a) Number of protons = number of electron in the atom = atomic number

So it has 7 protons answer

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8 0
4 years ago
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