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DanielleElmas [232]
4 years ago
7

How many sodium ions are in the initial 50.00-mL solution of Na2CO3

Chemistry
1 answer:
tresset_1 [31]4 years ago
8 0
From other sources, the given mass of the solute that is being dissolved here is 7.15 g Na2CO3 - 10H2O. We use this amount to convert it to moles of Na2CO3 by converting it to moles using the molar mass then relating the ratio of the unhydrated salt with the number of water molecules. And by the dissociation of the unhydrated salt in the solution, we can calculate the moles of Na+ ions that are present in the solution.

Na2CO3 = 2Na+ + CO3^2-

7.15 g Na2CO3 - 10H2O (1 mol / 402.9319 g) (1 mol Na2CO3 / 1 mol Na2CO3 - 10H2O) ( 1 mol Na2CO3 / 1 mol Na2CO3-10H2O ) ( 2 mol Na+ / 1 mol Na2CO3) = 0.04 mol Na+ ions present
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Describe one way in which advances in space technology have improved our understanding of objects in space.
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Answer:

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Explanation:

We can now research the world even more effectively and at a higher level of sophistication thanks to technological advancements. Telescopes, on the other hand, enable us to peer into the far corners of the universe and detect very large objects such as stars. Electron microscope enable us to see smaller objects such as cells and organisms.

7 0
3 years ago
a soft drink contains 47.0 carbohydrates per serving. calculate the number of nutritional calories (cal) per serving in this dri
Zolol [24]

A soft drink that contains 47 grams of carbohydrates per serving has a nutritional calories (cal) per serving of 188 calories.

Calories are a measurement of energy released from your body after digestion and absorption of food whereas carbohydrate is a carbon-based organic compound consisting of carbon, hydrogen, and oxygen atoms with a general chemical molecular formula of CH₂O.

In order to get the number of nutritional calories per serving from a soft drink that has 47 grams of carbohydrate, we will need to multiply the number of grams by 4 since there are about 4 calories for every gram of carbohydrate, and the calculation is as follows:

47×4=188

Hence, there are 188 calories in a soft drink that contains 47 grams of carbohydrates.

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8 0
1 year ago
Which of the following is a nonrenewable resource?
Rudik [331]

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6 0
3 years ago
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If the Dry bulb reads 25 degrees Celsius and the wet bulb reads 22
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Answer:

Relative humidity is low .

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6 0
3 years ago
Hi pls help pls pls. this is due at 11:59 help
Sveta_85 [38]

Answer:

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7 0
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