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Gennadij [26K]
3 years ago
5

How do you write 3.40 x 10 to the eighth power in standard form?

Chemistry
1 answer:
solong [7]3 years ago
7 0

Answer:

272

Explanation:

hope it helps i double checked the math :D

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when applied to a dish soap makes grease soluble in water which explains correctly supports the role of intermolecular forces in
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The nonpolar end of a soap molecule attaches itself to grease.
5 0
3 years ago
I need help, I don't understand the question
Oduvanchick [21]
Remember this. 

Ionic molecules has ionic bonds
Nonpolar molecules has dispersion (Van del Waals)
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a. polar- dipole-dipole
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d. nonpolar- dispersion
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f. polar-dipole-dipole
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3 0
3 years ago
PLEASE HELP I HAVE THIS TEST TOMORROW AM GIVING MORE POINTS THAN I SHOULD
zavuch27 [327]

Answer:

41.11 g of Ca(OH)2.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is given below:

CaO + H2O —> Ca(OH)2

Next, we shall determine the masses of CaO and H2O that reacted and the mass of Ca(OH)2 produced from the balanced equation. This can be obtained as follow:

Molar mass of CaO = 40 + 16 = 56 g/mol

Mass of CaO from the balanced equation = 1 × 56 = 56 g

Molar mass of H2O = (2x1) + 16

= 2 + 16

= 18 g/mol

Mass of H2O from the balanced equation = 1 × 18 = 18 g

Molar mass of Ca(OH)2 = 40 + 2(16 + 1)

= 40 + 2(17)

= 40 + 34

= 74 g/mol

Mass of Ca(OH)2 from the balanced equation = 1 × 74 = 74 g

From the balanced equation above,

56 g of CaO reacted with 18 g of H2O to produce 74 g of Ca(OH)2.

Finally, we obtained the mass of calcium hydroxide, Ca(OH)2 produced from the reaction of 33 g of CaO and 10 g of H2O. This can be obtained as follow:

From the question given above, we were told that when 33 g of CaO and 10 g of H2O reacted, 2 g of CaO were remaining. This implies that H2O is the limiting reactant and CaO is the excess reactant.

Thus, we shall use the limiting reactant to determine the mass of calcium hydroxide, Ca(OH)2 produced because it will give the maximum yield as all of it is consumed in the reaction.

The limiting reactant is H2O and the mass of calcium hydroxide, Ca(OH)2 produced can be obtained as follow:

From the balanced equation above,

18 g of H2O reacted to produce 74 g of Ca(OH)2.

Therefore, 10 g of H2O will react to produce = (10 × 74)/18 = 41.11 g of Ca(OH)2.

Therefore, 41.11 g of Ca(OH)2 were obtained from the reaction.

3 0
3 years ago
Write the balanced chemical equation for the combination (synthesis) reaction of magnesium with oxygen gas. phases are optional.
NISA [10]
The answer to this question would be:2 Mg<span> + O</span>2<span> = 2 MgO

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6 0
3 years ago
Is dissolving a solid a physical or chemical change
Mrac [35]

Dissolving a solid in liquid is a physical change . For eg table salt in water is a physical change because only the state of the matter has changed. Allowing the water to evaporate will return the salt to a solid state. Thus, dissolving a solid is a physical change.

7 0
3 years ago
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