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3 years ago

Help me please really only answer if u know the answer

Chemistry

2 answers:

Shtirlitz [24]3 years ago

7 0

Answer:

Explanation:

Asafahs

iren [92.7K]3 years ago

4 0

Answer:

Genetic matierial that is identical.

Explanation:

Because it produces new sets of chromosomes. This is biology btw. But you can never trust anyone on the internet.

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In a quasi-static isobaric expansion, 700 J of work are done by the gas. If the gas pressure is 0.40 atm, what is the fractional

nordsb [41]

Answer : The fractional increase in the volume of the gas is, 1.78

Explanation :

Formula used to calculate the work done by the gas in quasi-static isobaric expansion is:

$w=p\times dV$

Isobaric means, at constant pressure.

$w=p\times (V_f-V_i)$

where,

w = work done by the gas = 700 J = 6.909 L.atm (1 L.atm = 101.32 J)

p = pressure of the gas = 0.40 atm

$V_f$ = final volume = ?

$V_i$ = initial volume = 22.0 L

Now put all the given values in the above formula, we get:

$w=p\times (V_f-V_i)$

$6.909L.atm=0.40atm\times (V_f-22.0)L$

$V_f=39.3L$

Now we have to calculate the fractional increase in the volume of the gas.

Fractional increase in the volume of the gas = $\frac{V_f}{V_i}$

Fractional increase in the volume of the gas = $\frac{39.3L}{22.0L}$

Fractional increase in the volume of the gas = 1.78

Thus, the fractional increase in the volume of the gas is, 1.78

5 0

4 years ago

Question 22 of 25

padilas [110]

Answer:

D. and B.

Explanation:

I got it right on my quiz

4 0

3 years ago

A 125 g sample of strontium was heated from 0°C to 20°C. It absorbed 750 J of energy. What is the specific heat capacity of iron

aleksandrvk [35]

Answer:

Specific heat capacity of iron (C) = 0.3 J/GK

Explanation:

Given:

Mass of sample (m) = 125 gram

Change in heat (ΔT) = 20°C - 0°C = 20°C

Absorbed energy (ΔE) = 750 J

Find:

Specific heat capacity of iron (C) = ?

Computation:

⇒ Specific heat capacity of iron (C) = ΔE / [mΔT]

⇒ Specific heat capacity of iron (C) = 750 / [125 × 20]

⇒ Specific heat capacity of iron (C) = 750 / [2,500]

⇒ Specific heat capacity of iron (C) = 0.3 J/GK

4 0

3 years ago

Read 2 more answers

What is a pure substance?<br> What is it made up of?

goblinko [34]

Pure substances are substances that are made up of only one kind of particles and has a fixed or constant structure. They are classified as elements

6 0

4 years ago

Nitric acid is a key industrial chemical, largely used to make fertilizers and explosives. The first step in its synthesis is th

kolbaska11 [484]

Answer: When using 645 L /s of O2 in a temperature and pressure of 195°C, 0.88 atm respectively, we will get 0.355Kg /s NO

Explanation:

First we review the equation that represents the oxidation process of the NH3 to NO.

4NH3(g) + 5O2(g) ⟶4 NO(g) +6 H2O(l)

Second we gather the information what we are going to use in our calculations.

O2 Volume Rate = 645 L /s

Pressure = 0.88 atm

Temperature = 195°C + 273 = 468K

NO molecular weight = 30.01 g/mol

Third, in order to calculate the amount of NO moles produced by 645L/ s of O2, we must find out, how many moles (n) are 645L O2 by using the general gas equation PV =n RT

Let´s keep in mind that using this equation our constant R is 0.08205Lxatm/Kxmol

PV =n RT

n= PV / RT

n= [ 0.88atm x 645L/s] / [ (0.08205 Lxatm/Kxmol) x 468K]

n= 14.781 moles /s of O2

Fourth, now by knowing the amount of moles of O2, we can use the equation to calculate how many moles of NO will be produced and then with the molecular weight, we will finally know the total mass per second .

14.781 moles /s of O2 x 4moles NO / 5 moles O2 x 30.01g NO / 1 mol NO x 1Kg NO /1000g NO = 0.355Kg /s NO

6 0

3 years ago