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Serggg [28]
3 years ago
13

Can somebody plz help answer all of these questions right it’s very important. If u can that will be amazing thanks!

Chemistry
1 answer:
Blababa [14]3 years ago
4 0

Answer:

1. Mechanical energy

2. Heat/thermal energy

3. Electrical energy

4. Heat energy

5. Electrical energy

Explanation:

Hope this helped!

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Draw a Lewis structure for [H3O]+. Show all unshared pairs and the formal charges, if any.
Montano1993 [528]

Answer: Formal Charges: Hydrogen = 0 and Oxygen = +1

Unshared Pair of electrons: Hydrogen = 0 and Oxygen = 2

Explanation:

The attachment below shows the Lewis structure and the calculations

3 0
3 years ago
How many grams of CuF2 are needed to make a 2.8 M solution
11111nata11111 [884]
Molarity is given as,

                              Molarity  =  Moles / Volume of Solution  ----- (1)

Also, Moles is given as,

                              Moles  =  Mass / M.mass

Substituting value of moles in eq. 1,

                              Molarity  =  Mass / M.mass × Volume

Solving for Mass,

                              Mass  =  Molarity × M.mass × Volume  ---- (2)

Data Given;

                  Molarity  =  2.8 mol.L⁻¹

                  M.mass  =  101.5 g.mol⁻¹

                  Volume  =  1 L (I have assumed it because it is not given)

Putting values in eq. 2,

                              Mass  =  2.8 mol.L⁻¹ × 101.5 g.mol⁻¹ × 1 L

                              Mass  =  284.2 g of CuF₂
5 0
3 years ago
Which of the following is a farming method that helps reduce the effects of wind erosion?
MrMuchimi
You can reduce wind erosion by providing a protective plant cover for the soil.
4 0
3 years ago
Calculate the number of grams of CH_3COOH in the vinegar.
AysviL [449]
<span>when density in g/ml
9.86ml CH3COOH (X g/1ml) = g
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hope it helps
</span>
6 0
3 years ago
Robidium and cesium have similar chemical properties because in the ground it states the atoms of both elements each have
anzhelika [568]
It would be one electron in the outermost shell. Hope this helps!
5 0
3 years ago
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