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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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Margarita [4]

I think it is the first choice

Hope that helped!

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A substance that increases the concentration of hydroxide ions in aqueous solution.
stepladder [879]
The answer that complete the sentence is "Arrhenius base".

The complete sentence is: A substance that increases the concentration of hydroxide ions in aqueous solution is an Arrhenius base.

Arrhenius' acid and base model says that an acid is a substance that contains hydrogen and ionizes in aqueous solution producing protons (H+) and a base is a substance that cointains hydroxide and release it in aqueous solution.
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3 years ago
Which is a FALSE statement about the possible benefits of nanocars? A. They could work together to build really complex things.
kondor19780726 [428]
C, they could work together to make things from the top down. 
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3 years ago
How does an atom become a positively charged ion
sladkih [1.3K]
When, it donates electons.

as for example take
NaCl ( sodium chloride)

it's an ionic compund,
that means it is formed by donating or gaining electrons

Na is writen first than, it must be electropositive i.e it has donated electons which made it positive and the clorine gains electron so it's electronegative.

Na is positive because
as we know it's atomic number is 11 that means it has 11 protons and 11 electrons
now, when it donate electon it has, greater number of protons whose change is +ve so the atom becomes overall positively charged ion or cation.

and something same happens in clorine and because it gains one electron and the number of electrons increase in it by 1 whise charge is -ve so, the atom becomes negatively charged ion or anion which has a -1 charge.
3 0
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What is the mass number of lithium isotope that consists of 3 protons, 4 neutron and 3 electrons
sweet-ann [11.9K]

Answer:

7. ok

please mark me brainlistb

6 0
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