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3 years ago

Why are water molecules polar? select one:

Chemistry

1 answer:

krek1111 [17]3 years ago

5 0

B since Oxygen is more electronegative, meaning they have a strong stronger pull on the electrons creating poles

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Which of the following is NOT a cause of Earth's internal heat?

miskamm [114]

Answer:

I think it A good luck this thing is making me write 20 letters so I can give you the answer byeee

7 0

3 years ago

A serving of soup contains 5.0 g of fat, 20.0 g of carbohydrates, and 3.0 g of protein. Determine how many kilocalories (kcal) a

marta [7]

Answer: The amount of kilocalories contained in the given serving of soup is 0.137 kCal

Explanation:

As per the USDA:

Carbohydrates provide 4 calories per gram, protein provides 4 calories per gram, and fat provides 9 calories per gram.

We are given

Mass of fat in the soup serving = 5.0 g

Mass of carbohydrates in the soup serving = 20.0 g

Mass of protein in the soup serving = 3.0 g

Conversion factor used: 1 kCal = 1000 Cal

Applying unitary method:

For Fat:

1 gram of fat provides 9 calories

So, 5.0 gram of fat will provide = $\frac{9}{1}\times 5.0=45Cal=0.045kCal$

For Carbohydrates:

1 gram of carbohydrates provides 4 calories

So, 20.0 gram of carbohydrates will provide = $\frac{4}{1}\times 20.0=80Cal=0.080kCal$

For Proteins:

1 gram of proteins provides 4 calories

So, 3.0 gram of fat will provide = $\frac{4}{1}\times 3=12Cal=0.012kCal$

Total kilocalories per serving = [0.045 + 0.080 + 0.012] kCal = 0.137 kCal

Hence, the amount of kilocalories contained in the given serving of soup is 0.137 kCal

4 0

3 years ago

What is the formula for CNHO

kolbaska11 [484]

Answer:

this is basically structure of iso cyanic acid

5 0

3 years ago

What is the ratio strength of 100 ml containing a 1:50 povidone iodine solution diluted to 1000 ml? (answer must be numeric; no

guapka [62]

We are given that:

100 mL total solution with 1:50 povidone iodine solution

This means that there is 1 mL of povidone iodine solution per 50 mL of total solution. Since we are given a total of 100 mL solution, therefore we have an initial amount of:

pure povidone iodine solution = 2 mL

This amount of pure povidone iodine solution is added or diluted (most perhaps with water) to make a total of 1000 mL total solution, therefore the new ratio is:

2:1000 povidone iodine solution

By dividing both sides by 2, this simplifies to

1:500 povidone iodine solution

Answer:

1:500

4 0

3 years ago

How much thermal energy is needed to change the temperature of kg of water from 25 degrees Celsius to boiling (Hint : boiling in

uysha [10]

∆H = mc∆T

c = specific heat capacity

c of water = 4200 J/kg °C

∆H = 1 * 4200 * (100°C - 25°C)

∆H = 315000J

∆H = 315 KJ

3 0

3 years ago