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Maslowich
2 years ago
11

What are the two main types of energy?In an illustration, lines of force are drawn around a magnet to illustrate the magnetic

Chemistry
1 answer:
gladu [14]2 years ago
5 0
Potential and kinetic
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Which formula represents a molecular compound?<br> (1) HI (3) KCl<br> (2) KI (4) LiCl
mamaluj [8]
The answer is (1) HI. H and I are both nonmetals, and remember that a molecular compound is one in which covalent bonds hold atoms together, and covalent bonds typically form between nonmetals. The other three choices represent ionic compounds (metal and nonmetal).
3 0
2 years ago
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Read the claim.
exis [7]
D I think because people who already have fast metabolism won’t need it And B and C are just random
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Which one of the following is an example of a balanced chemical reaction?
Goryan [66]

Answer:

Option a.

Explanation:

To determine which is a balanced chemical reaction, see the stoichiometry.

Stoichiometry coefficients are the numbers that appear before the compounds. These numbers indicate moles of substance.

Notice that the number of elements must be the same in both sides of the equation.

In this case, option a is the balanced chemical reaction.

8HCl + 2KMnO₄ → 3Cl₂ + 2MnO₂ + 4H₂O + 2KCl

8 moles of HCl react to 2 moles of potassium permanganate in order to produce 2 moles of magnessium dioxide, 3 moles of chlorine, 2 moles of potassium chloride and 4 moles of water.

8 H, 8 Cl, 2 K, 2 Mn and 8 O

4 0
2 years ago
An atom has 8 protons, 8 neutrons, and 8 electrons. another isotope of the same element might have
Grace [21]
Isotopes are atoms of the same element that have the same number of protons and electrons but different number of neutrons.
Masses of atoms are the sum of protons and neutrons. Therefore when the number of neutrons change but protons are the same, then the masses of the atoms change.
isotope 1 has 8 protons , 8 electrons and 8 neutrons.
isotope 2 has 8 protons, 8 electrons and 10 neutrons

mass of isotope 1 is 16
and mass of isotope 2 is 18
3 0
2 years ago
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Name two methods of separating mixtures. Describe the property each of these separations based
grigory [225]

Answer:

Distillation and using Chromatography

Explanation:

Distillation:

based on using boiling point.

Ex: separating a mixture of water and sugar by boiling the water away.

Chromatography:

based on absorption

Ex: separating the different colours that make up a black marker

8 0
3 years ago
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