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ExtremeBDS [4]
3 years ago
14

A student makes measurements to calculate the density of a rod of aluminum to be

Chemistry
1 answer:
natita [175]3 years ago
3 0

Answer:

20.7%

Explanation:

Percentage error = (difference in measurement ÷ real measurement) x 100%

= (3.26 - 2.70)/2.70 x 100%

= 0.56/2.7 x 100%

= 0.2074 x 100% = 20.74%

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Gaseous ammonia chemically reacts with oxygen O2 gas to produce nitrogen monoxide gas and water vapor. Calculate the moles of ox
WINSTONCH [101]

Answer : The number of moles of oxygen needed are, 1.5 moles.

Explanation :

The balanced chemical reaction will be:

4NH_3+5O_2\rightarrow 4NO+6H_2O

Now we have to calculate the moles of oxygen.

From the balanced chemical reaction we conclude that,

As, 6 moles of water vapor produces from 5 moles of oxygen

So, 1.80 moles of water vapor produces from \frac{5}{6}\times 1.80=1.5 moles of oxygen

Therefore, the number of moles of oxygen needed are, 1.5 moles.

6 0
3 years ago
Nylon was first synthesised in
galben [10]

Answer:

In 1935

First synthetic fiber produced by man

Got it's name from Cities of New York And London

3 0
3 years ago
what would be the ph of an aqueous solution of sulphuric acid which is 5×10^_5 mol l^_1 in concentration​
guajiro [1.7K]

Answer:

the ph of an aqueous solution of sulphuric acid which is 5*10^5 mol in concentration is basic in nature

6 0
3 years ago
Which of the following is true about the concept of half-life?
Reptile [31]
Its A. because it measures the rate of the decay of the isotope
8 0
3 years ago
Read 2 more answers
If cells in the process of dividing are subjected to colchicine, a drug that interferes with the formation of the spindle appara
Orlov [11]

The question is incomplete as it does not have the options which are:

A) anaphase

B) prophase

C) telophase

D) metaphase

E) interphase

Answer:

The correct answer will be option-D

Explanation:

Colchicine is a drug obtained from the <em>Colchicum autumnale</em> which is a poisonous European flowering plant. The drug is used to treat joint swelling and gout.

Colchicine shows its effect during the cell division cycle especially during the division of nuclear content. When the cell is in metaphase and is preparing for the anaphase, the colchicine inhibits the polymerisation of the microtubules. The inhibition of microtubules inhibits the assembly of the mitotic spindle as a result of this the DNA do not move into new daughter cells.

Thus, option-D is the correct answer.

5 0
3 years ago
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