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4 years ago

What is the sum? 3x/x-4 + x-3/2x

Chemistry

1 answer:

Ivahew [28]4 years ago

7 0

Answer:

(7x² - 7x + 12)/2x(x - 4).

Explanation:

To do this calculation process:

We should common the denominator by multiplying the denominators of the two terms (2x)(x - 4) and dividing each denominator by the common denominator.

So, it will be equal:

[2x(3x) + (x -4)(x - 2)]/2x(x - 4)

= [6x² + x² - 7x + 12]/2x(x - 4)

= [7x² - 7x + 12]/2x(x - 4).

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What is the mass in grams of 1.204x10^24 atoms of carbon

Mekhanik [1.2K]

It should be 24g of carbon

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3 years ago

How many moles are in 141.16 grams of F?<br> Use two digits past the decimal for all values

Finger [1]

Answer: 2681.81

Explanation:

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4 years ago

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Which of the following substances (with specific heat capacity provided) would show the greatest temperature change upon absorbi

JulijaS [17]

Answer:

Pb is the substance that experiments the greatest temperature change.

Explanation:

The specific heat capacity refers to the amount of heat energy required to raise in 1 degree the temperature of 1 gram of substance. The highest the heat capacity, the more energy it would be required. These variables are related through the equation:

Q = c . m . ΔT

where,

Q is the amount of heat energy provided (J)

c is the specific heat capacity (J/g.°C)

m is the mass of the substance

ΔT is the change in temperature

Since the question is about the change in temperature, we can rearrange the equation like this:

$\Delta T = \frac{Q}{c.m}$

All the substances in the options have the same mass (m=10.0g) and absorb the same amount of heat (Q=100.0J), so the change in temperature depends only on the specific heat capacity. We can see in the last equation that they are inversely proportional; the lower c, the greater ΔT. Since we are looking for the greatest temperature change, It must be the one with the lowest c, namely, Pb with c = 0.128 J/g°C. This makes sense because Pb is a metal and therefore a good conductor of heat.

Its change in temperature is:

$\Delta T = \frac{q}{c.m} = \frac{100.0 J}{0.128 J/g.C . 10.0g } = 78.1$

5 0

3 years ago

Read 2 more answers

A mixture of gases contains 4.46 moles of neon (Ne), 0.74 mole of argon (Ar), and 2.15 moles of xenon (Xe). Calculate the partia

viva [34]

Explanation:

The partial pressure of an individual gas is equal to the total pressure of the mixture multiplied by the mole fraction of the gas.

Total pressure = 2atm

Mole Fraction = number of moles / total number of moles

Neon

Mole Fraction = 4.46 / 7.35 = 0.607

Partial Pressure = 0.607 * 2 = 1.214 atm

Argon

Mole Fraction = 0.74 / 7.35 = 0.101

Partial Pressure = 0.101 * 2 = 0.202 atm

Xenon

Mole Fraction = 2.15 / 7.35 = 0.293

Partial Pressure = 0.293 * 2 = 0.586 atm

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3 years ago

Lons form because the loss of one or more electrons makes

ruslelena [56]

This statement lons form because the loss of one or more electrons makes them less stable than their corresponding atoms; this state requires more energy to maintain is FALSE.

An ion forms when an atom loses or gains one more electrons.
This loss or gain of electrons causes the ion to gain the stable octet configuration.

This stable octet configuration requires less energy to maintain than the corresponding atom.

So, since the stable octet configuration of the ion requires less energy than the corresponding atom, the statement is false.

So, the statement lons form because the loss of one or more electrons makes them less stable than their corresponding atoms; this state requires more energy to maintain is FALSE.

Learn more about ions here:

brainly.com/question/3631272

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3 years ago