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1 year ago

If I(to study),I(to pass)the exams

Chemistry

1 answer:

Thepotemich [5.8K]1 year ago

8 0

If I study, I will pass the exams.

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Why are liquids often dense?

Sophie [7]

The answer: The answer is B

8 0

2 years ago

Which of the following chemical reactions is an oxidation-reduction reaction?

8_murik_8 [283]

1) Reactions which involves both a reduction process and a complementary oxidation process are called oxidation-reduction.they can't be double replacement reactions.
Hence,
WO3 + 3H2 ---> W + 3H2O is an oxidation-reduction reaction

7 0

2 years ago

Read 2 more answers

Calculate the heat required to melt 25.7 g of solid methanol at its melting point

umka2103 [35]

The heat required to melt the compound is 2.56kJ.

Why?

To calculate the heat required to melt 25.7 g of solid methanol, we need to calculate its molar mass, know its chemical formula, its molar heat of fusion, and calculate how many moles represent 25.7g of the same compound.

Then, we need to use the following formula to calculate the heat:

$Q=N*u$

Where,

N is the moles of the compound

u, is the molar heat of fusion of the compound (J/mol)

We know that the molar mass of methanol is :

$32.042\frac{g}{mol}$

So, we can calculate the number of moles that represents 25.7g of the same compound:

$N=\frac{mass(g)}{molarmass(\frac{g}{mol}} \\\\N=\frac{25.7g}{32.042\frac{g}{mol}}=0.8mol(methanol)$

Also, the molar heat of fusion of methanol is:

$u_{methanol}=3200\frac{J}{mol}=3.2\frac{kJ}{mol}$

Now, substituting into the first equation and calculating, we have:

$Q=N*u$

$Q=0.8mol*3.2\frac{kJ}{mol}=2.56kJ$

Hence, we have that the heat required to melt the compound is 2.56kJ.

Have a nice day!

4 0

2 years ago

Read 2 more answers

What is often sprayed on fuel spills to prevent fire by keeping oxygen away

vlada-n [284]

That would be sand I think

8 0

3 years ago

Ornithine serves three metabolically important roles, but is not found in proteins. What is one of the important roles of ornith

hoa [83]

Answer:

b. an intermediate in the urea cycle

Explanation:

Ornithine is a non-essential amino acid which is produced as intermediate molecule in urea cycle.

Ornithine also plays important role in regulation of several metabolic processes which leads to diseases like hyperammonemia, hyperorithinemia and cancer in the body of humans.

Role in the urea cycle:

Ornithine is a products of action of enzyme arginase on l-arginine which is responsible for the formation of urea. Thus, ornithine is a central part of the urea cycle and allows for disposal of the excess amount of nitrogen.

4 0

2 years ago

If I(to study),I(to pass)the exams​

If I(to study),I(to pass)the exams