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3 years ago

If an object has a velocity of 8 m/s and

Chemistry

1 answer:

Y_Kistochka [10]3 years ago

5 0

Answer:

Explanation:

The Kinetic Energy (K.E) of an object can be calculated as:

We are given:

K.E = 480 K

Velocity of the object = v = 8 m/s

Using the values, we get:

Thus, the mass of the object will be 15 kg.

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In a ________ reaction, a single uncombined element replaces another element in a compound. synthesis double displacement single

kicyunya [14]

In a single displacement / replacement reaction a single uncombined element replaces another element in a compound.

Single replacement is type of chemical reaction where an element react with a compound and take the place of another element in that compound.
example of this type of reaction is
Zn+ 2HCl -----> Zncl2 + H2

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3 years ago

What do you notice when you get into a car that has been sitting in the sun for a while?

Alona [7]

Answer:

I notice that it's extremely hot after it has been sitting in thr sun for a while. The sun's rays have been directly shining on the car because the car was in the sun's Ray's directly. If the car's windows were to be left open, it would be less hot but still be hot if the rays of the sun were directly on the car.

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3 years ago

Choose the correct net ionic equation for the reaction (if a reaction occurs) between CaCl2 and AgNO3: Group of answer choices

Levart [38]

Answer:

2Ag⁺(aq) + 2Cl⁻(aq) -> 2AgCl(s)

Explanation:

Silver nitrate and calcium chloride will react in a double displacement reaction (which has to produce a precipitate, a gas, or water to have a reaction).

This reaction will produce a silver chloride precipitate and a solution of calcium nitrate.

The reaction will be 2AgNO3(aq) + CaCl2(aq) -> 2AgCl(s) + Ca(NO3)2(aq)

To write a net ionic equation:

1. Write the balanced molecular equation.

2AgNO3 + CaCl2 -> 2AgCl(ppt) + Ca(NO3)2

2. Write the balanced complete ionic equation.

To write the complete ionic equation:

- Start with a balanced molecular equation.

2AgNO3(aq) + CaCl2(aq) -> 2AgCl(s) + Ca(NO3)2(aq)

- Break all soluble strong electrolytes (compounds with (aq) beside them) into their ions

indicate the correct formula and charge of each ion

indicate the correct number of each ion

write (aq) after each ion

- Bring down all compounds with (s), (l), or (g) unchanged.

2Ag⁺(aq) + 2NO³⁻(aq) + Ca²⁺(aq) + 2Cl⁻(aq) -> 2AgCl(s) + Ca²⁺(aq) + 2NO³⁻(aq)

3. Cross out the spectator ions that are present. Spectator ions are ions that are present in the reaction mixture but do not participate in it. You can recognize spectator ions by looking for ions that are present on both sides of the equation.

4. Write the "leftovers" as the net ionic equation.

2Ag⁺(aq) + 2Cl⁻(aq) -> 2AgCl(s)

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3 years ago

Which type of chemical bond involves the sharing of valence electrons between two atoms?

mr_godi [17]

Covalent bond is the type of bond which involves the sharing of valence electrons between two atoms.
This bond usually arises from the equal attraction of the nuclei of the two atoms for the electrons shared.

Ionic bond, on the other hand, arises due to the transfer of electrons from the valence shell of one atom to the valence shell of the other.

7 0

3 years ago

Can someone please help me

Mashutka [201]

Answer:

ok this is going to be a bit much but i will teach the basics. also this is an exothermic reaction

Explanation:

concentration H2 increases: it shifts to the right. this decreases O2 and increase H2O and K stays the same

concentration H2 decreases: it shifts to the left, it increases O2 and decreases H2O and K stays the same

concentration of O2 increases: it shifts to the right, this decreases H2 and increase H2O and K remains the same
concentration of O2 decreases: it shifts to the left. this increases H2 and decreases H2O and K stays the same

concentration of H2O increases: it shifts to the left, this increases H2 and O2

concentration of H2O decreases: it shifts to the right, this decreases H2 and O2

temp. increase: shifts left, increase H2 and O2, decreases H20 and K decreases

temp decrease: shifts right, decrease H2 and O2, increase H2O and K increases

pressure increase: shifts right, decrease H2 and O2, increase H2O and K remains the same

ps i hope this helps. and i hope it isn't to confusing.

Sincerely, Marie

6 0

3 years ago