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4 years ago

why must a beaker containing a liquid be placed on a wire gauze above a burner flame and not directly over the flame

Chemistry

2 answers:

Lelu [443]4 years ago

7 0

Answer:

it is not safe if you put the beaker down not on the wire gauze about the flame. SAFETY FIRST

Explanation:

likoan [24]4 years ago

6 0

Answer:

To evenly heat the beaker and the liquid

Explanation:

The beaker containing a liquid must be placed on a wire glaze above a burner flame so that it’ll evenly heat throughout the entire beaker, otherwise if you were to just place the beaker above the flame not only could you potentially burn yourself but the liquid will not heat evenly.

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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

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3 years ago

why must a beaker containing a liquid be placed on a wire gauze above a burner flame and not directly over the flame ​

why must a beaker containing a liquid be placed on a wire gauze above a burner flame and not directly over the flame