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WITCHER [35]
3 years ago
14

Which of the following statements about metalloids is true?

Chemistry
2 answers:
Klio2033 [76]3 years ago
7 0
Metalloids had properties that fall between those of metals and nonmetals (I believe that to be correct-.-)
aleksklad [387]3 years ago
3 0

Answer: Option (c) is the correct answer.

Explanation:

Metalloids are the substances or elements that show properties of both metals and non-metals.

Metals are good conductors of heat and electricity. They have shiny surface and can be drawn into thin wires and sheets.

Whereas non-metals are bad conductors of heat and electricity. They are brittle in nature and are not shiny.

Similarly, metalloids are shiny but they are brittle at the same time with a relatively good electrical conductivity.

Thus, we can conclude that the statement, metalloids have properties that fall between those of metals and nonmetals, is true about metalloids.

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If 23.6 g of hydrogen gas reacts with 28.3 g of nitrogen gas, what is the maximum amount of product that can be produced?
Aleonysh [2.5K]

Answer:

34.3 g NH3

Explanation:

M(H2) = 2*1 = 2 g/mol

M(N2) = 2*14 = 28 g/mol

M(NH3) = 14 + 3*1 = 17 g/mol

23.6 g H2* 1 mol/2 g = 11.8 mol H2

28.3 g N2 * 1 mol/28 g = 1.01 mol N2

                                 3H2 + N2 ------> 2NH3

from reaction         3 mol    1 mol

given                   11.8 mol    1.01 mol

We can see that H2 is given in excess, N2 is limiting reactant.

                                 3H2 + N2 ------> 2NH3

from reaction                     1 mol         2 mol

given                                 1.01 mol      x

x = 2*1.01/1= 2.02 mol NH3

2.02 mol * 17g/1 mol ≈ 34.3 g NH3

8 0
4 years ago
Bromine is is reddish-brown liquid that boils at 59 degrees. bromine is highly reactive with many metals, for example, it reacts
katrin2010 [14]
A physical property of an element is a property of an element that can observed or measured without changing the chemical nature of the element.

A chemical property of an element is a property of an element that can only be observed or measure when the chemical property of the element is altered or changed.

Based on this;
The boiling point of bromine is a physical property of bromine.
The high reactivity of bromine with many elements is a chemical property of bromine.
4 0
3 years ago
Giúp mình 2 câu này với ạ
alisha [4.7K]

Answer:it is wrong answer

Explanation:estro man

5 0
2 years ago
Difference between nitrogen 14 and nitrogen 15
Tema [17]
Did you ever get this answer
5 0
3 years ago
If 1.546 g of copper was used by a student at the start of the lab, and 0.732 g of copper were obtained at
mash [69]

Answer: Percent recovery is 47.34 %

Explanation:

Percent yield is defined as the ratio of experimental yiled to theoretical yield in terms of percentage.

{\text{ percent yield}}=\frac{\text{amount recovered}}{\text{total amount}}\times 100

Putting in the values we get:

{\text{ percent yield}}=\frac{0.732}{1.546}\times 100=47.34\%

Therefore, the percent recovery is 47.34 %

8 0
3 years ago
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