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Sauron [17]
3 years ago
15

how many grams of water can be produced when 65.5 grams of sodium hydroxide react with excess sulfuric acid.

Chemistry
1 answer:
34kurt3 years ago
3 0

2NaOH+H2SO4--> Na2SO4+2H2O

80g NaOH(40g/mol)--> 36g H2O (18g/mol)

65.5 x (1/40g/mol)= 1.64 moles of NaOH

1.64 x 18g/mol= 29.5 g H2O

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Which word should replace the question mark in the diagram?
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An 8 oz serving of whole milk has 8.0 g of fat, 8.0 g of protein, and 13 g of carbohydrates. Approximately how many kilocalories
dsp73
<h3>Answer:</h3>

156 calories

<h3>Explanation:</h3>
  • Carbohydrates, proteins and fats are food substances used by living organisms to generate energy required for the day to day activities.
  • They supply energy which differs per gram for each food substance.
  • That is;

1 g of carbohydrate = 4 calories

1 g of fat = 9 calories

1 g of protein = 4 calories

Therefore, whole milk serving containing 8.0 g of fat, 8.0 g of protein and 13 g of carbohydrates will contain the following number of calories;

8.0 g of fat = 8 g × 9 cal/g = 72 calories

8.0 g of protein = 8 g × 4 cal/g = 32 calories

13 g of carbohydrates = 13 g × 4 cal/g = 52 calories

Total amount of energy = 156 calories

Therefore, an 8 oz serving of whole milk contains 156 calories

8 0
3 years ago
Gas is contained in a 9.00-L vessel at a temperature of 24.0°C and a pressure of 5.00 atm. (a) Determine the number of moles of
coldgirl [10]

Answer:

a. Moles in the vessel = 1.85 moles of the gas

b. 1.11x10²⁴ molecules are in the vessel

Explanation:

a.It is possible to determine moles of a gas using the general law of gases:

PV = nRT

<em>Where P is pressure: 5.00atm; V is volume = 9.00L; R is gas constant: 0.082atmL/molK; T is absolute temperature: 273.15K +24.0 = 297.15K</em>

<em />

Computing the values:

PV / RT = n

5.00atm* 9.00L / 0.082atmL/molK*297.15K = n

<h3>Moles in the vessel = 1.85 moles of the gas</h3><h3 />

b. With Avogadro's number we can convert moles of any compound to molecules thus:

Avogadro's number = 6.022x10²³ molecules / mole

1.85moles ₓ (6.022x10²³ molecules / mole) =

<h3>1.11x10²⁴ molecules are in the vessel</h3>
3 0
4 years ago
Which of these natural resources is non-renewable A.Corn B.wind c.geothermal D.natural gas
adelina 88 [10]

The correct answer would be: D. Natural gas

This would be the correct answer since natural gases are considered a fossil fuel. The other options are renewable resources. Corn can be reproduced. Wind is a source of energy which makes it renewable. Geothermal is also a renewable resource since its heat is from the earth's core which could be used multiple times.

Hope this helps! :3

7 0
4 years ago
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