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4 years ago

Which statement is true about the activity series? (5 points)

Chemistry

2 answers:

Oduvanchick [21]4 years ago

6 0

Answer:

Which statement is true about the activity series?

Elements are listed according to their reactivity. This allows you, in a displacement reaction, to deduce if a reaction is going to take place accordingly to the reactivity of the reactants.

Which of the following statements is true about nuclear fusion?

It occurs in the sun. In fusion, nuclei of lighter atoms are combined to make a heavy nucleus, and it release a large amount of energy.

Which of the above reactions is an example of a combustion and also a synthesis reaction?

1 C3H8 + 5O2 → 3CO2 + 4H2O

Here a fuel (propane, C3H8) reacts with O2 to produce heat, carbon dioxide and water. And those are the characteristics of a combustion reaction.

coldgirl [10]4 years ago

3 0

Answer: Correct statements are given below:

1) In activity series elements are listed according to their reactivity.

2) Nuclear reaction in which low atomic nuclei fuse to form a heavier nucleus with the release of energy. Nuclear fusion reaction occurs in the sun.

3) C3H8 + 5O2 → 3CO2 + 4H2O is the example of a combustion reaction.

4) 2Fe + O2 → 2FeO is the example of synthesis reaction. In synthesis reaction is a type of reaction in which two reactants combine to form a single product.

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3 years ago

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3 years ago

Bacteria and viruses are inactivated by temperatures above 139 ∘C in an autoclave. An autoclave contains steam at 1.00 atm and 1

andrezito [222]

To answer this question, we will use pressure law which states that:
"At constant volume of a fixed mass of gas, the pressure of the gas is directly proportional to the temperature"

This means that:
Pi / Ti = Pf / Tf where:
Pi is the initial pressure = 1 atm
Ti is the initial temperature = 100 + 273 = 373 degree kelvin
Pf is the final pressure that we want to calculate
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3 years ago

Select the electron-domain geometry for a molecule with three bonding domains and one nonbonding domain.

mamaluj [8]

Answer: C) Tetrahedral

Explanation:

The number of electron pairs is 4 that means the hybridization will be $sp^3$ but as there are three bonding domains and one nonbonding domain, thus electronic geometry is tetrahedral and the molecular geometry will be trigonal pyramidal.

Linear electron geometry is possible when number of electron pairs is 2 and the hybridization will be $sp^2$ .

Trigonal planar geometry is possible when number of electron pairs is 3 and the hybridization will be $sp^3$ .

Trigonal bipyramidal geometry is possible when number of electron pairs is 5 and the hybridization will be $sp^3d$ .

Octahedral geometry is possible when number of electron pairs is 6 and the hybridization will be $sp^3d^2$ .

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4 years ago

How many unpaired electrons are there in Cu1+ ion

goldfiish [28.3K]

If electrons are negative, losing an electron makes the ion positive.
Therefore Cu1+ contains 1 unpaired electron.

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4 years ago