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lys-0071 [83]
3 years ago
14

One app charges $3.90 to download and $.79 for each song bought. A second app is free to download and charges $1.09 for each son

g. How many songs would you have to buy for the apps to cost the same?
Number of songs =
Chemistry
1 answer:
Rainbow [258]3 years ago
7 0

Answer:

3.6

Explanation:

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I need help!!!! Plz help me with the above question
maksim [4K]
The answer will be bar graph

4 0
4 years ago
A cation is a metallic ion derived from base.Why is it derived from base?Can you derive it from an acid?
Scorpion4ik [409]

Answer:the cation can't be drived from an acid

Explanation:

Example

HCL+MgOH2=MgCl2+H2O

The cation in the salt magnesium chloride is magnesium which is derived from the base and the anion chlorine from the acid hydrochloric acid. The same is true in water.

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7 0
4 years ago
The vapor pressure of water at 25 •C is 23.8 mmHg. Write K for the vaporization of water in the unit of atm. What is Kc for the
r-ruslan [8.4K]

The degree of dissociation gives the amount of the substance that dissociated into the products. The value of Kc for water is 1.28 x 10⁻³.

<h3>What is equilibrium constant, Kc?</h3>

The equilibrium constant, Kc is the equilibrium concentration of the products over the reactants that are raised by the powers of their stoichiometry coefficient.

The reaction is shown as:

H₂​O(l) ⇋ H₂​O(g)

Kp = pressure of water = 0.03131579 atm

\rm Kp = Kc(RT)^{\Delta n}

Here Δ n = 1

Solving further,

Kp = Kc(RT)

0.03131579 = Kc(0.0821 × 298.15)

Kc =1.28 x 10⁻³

Therefore, Kc is 1.28 x 10⁻³.

Learn more about the equilibrium constant here:

brainly.com/question/14988161

#SPJ1

7 0
2 years ago
Please help with this chemistry question, image attached.
Alexeev081 [22]

Answer:

a. Sally did not take account the atoms of the compounds, because she only summed Al + O and in the oxide, we have 2 mol of Al and 3 mol of O

b. The conversion factor that Jacob did, was wrong.

Moles must be divided by moles, so they can be cancelled. The correct conversion factor is:

9.45 mol . 102 g / 1 mol = 963.9 g

Explanation:

Al₂O₃ → Aluminum oxide

We determine the molar mass:

Molar mass Al . 2 + Molar mass O . 3

27 g/mol . 2 + 16 g/mol . 3 = 102 g/mol

a. Sally did not take account the atoms of the compounds, because she only summed Al + O and in the oxide, we have 2 mol of Al and 3 mol of O

b. The conversion factor that Jacob did, was wrong.

Moles must be divided by moles, so they can be cancelled. The correct conversion factor is:

9.45 mol . 102 g / 1 mol = 963.9 g

7 0
3 years ago
Is peeling an orange a chemical reaction?
Radda [10]
No, the inside is still the same when you peel it.
4 0
3 years ago
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