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Evgesh-ka [11]
3 years ago
12

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

Chemistry
2 answers:
Oduvanchick [21]3 years ago
6 0

Answer:

<em>Which statement is true about the activity series? </em>

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.

<em>Which of the following statements is true about nuclear fusion?</em>

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.

<em>Which of the above reactions is an example of a combustion and also a synthesis reaction?</em>

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]3 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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how many equivalent resonance structures can you draw for sulfate where the formal charges a minimized (like in the previous que
ch4aika [34]

There isn't a most favorable equivalent resonance of the Sulfate ion because they are all identical in charge and there is no change in Electronegativity between the Oxygen atoms.

What is atom?

An atom is a particle of count that uniquely defines a chemical element. Atoms include a critical nucleus surrounded with the aid of using one or greater negatively charged electrons. The nucleus is undoubtedly charged and carries one or greater quite heavy debris referred to as protons and neutrons.

Therefore, There isn't a most favorable equivalent resonance of the Sulfate ion because they are all identical in charge and there is no change in Electronegativity between the Oxygen atoms.

To learn more about atom refer the given link:-
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1 year ago
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3 years ago
Pilots often use waves of about 2.340m to communicate. what is the frequency of the wave ?why?
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<span>abbreviated (c) equal to 3.00 × 108 m/s. The frequency ([1]) that light waves pass a given point is</span>

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3 years ago
How many sodium ions are in 4543.3 g of NaCl?
Stella [2.4K]

Answer:

4.68x10²⁵ ions of Na⁺

Explanation:

First of all, we dissociate the salt:

NaCl(aq) → Na⁺(aq) + Cl⁻(aq)

An aqueous solution of NaCl dissociates in chlorides anions and sodium cations. Ratio is 1:1, per 1 mol of NaCl, we have 1 mol of Na⁺

We determine the moles of salt: 4543.3 g . 1mol / 58.45 g = 77.7 moles

77.7 moles are the amount of NaCl, therefore we have 77.7 moles of Na⁺.

We count the ions:

1 mol fo Na⁺ has 6.02x10²³ ions

77.7 moles of Na⁺ must have (77.7 . 6.02x10²³) / 1 = 4.68x10²⁵ ions of Na⁺

3 0
3 years ago
Read 2 more answers
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