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4 years ago

Classify these substances as acidic, basic, or neutral:

Chemistry

1 answer:

mestny [16]4 years ago

5 0

Acid=vinegar(ph of 2), tomato juice(ph of 4)
base=baking soda(ph of 9)
neutral= sugar(ph of about 7)

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Find the number of moles that are in 2.23 g of Li 2 O and report it with the correct significant figures.

Lesechka [4]

Not sure about the number of significant figures; you can decide where to round, but I would probably say 0.075mol.

8 0

3 years ago

Calculate the volume(in L), at STP, of carbon dioxide produced by the complete combustion of 6.75 lbs of charcoal.

gtnhenbr [62]

535.8 L volume(in L), at STP, of carbon dioxide produced by the complete combustion of 6.75 lbs of charcoal.

<h3>What is an ideal gas equation?</h3>

The ideal gas law (PV = nRT) relates the macroscopic properties of ideal gases. An ideal gas is a gas in which the particles (a) do not attract or repel one another and (b) take up no space (have no volume).

Given:

$C(s) + O_2(g)$ ⇒ $CO_2(g)$

1 mole of $CO_2(g)$ is formed from 1 mole of charcoal, that means 1 mole of $CO_2(g)$ is formed from 12 g of charcoal.

1 lbs = 453.592 grams

6.75 lbs = 6.75 x 453.592 =3061.746g

So, $CO_2(g)$ formed from 3061.746g of charcoal is:

= $\frac{1}{12}$ x 3061.746g

=255.14 mol.

Now, at STP, the volume of 1 mol of gas =22.4 L

Volume of 255.14 mol of $CO_2(g)$ = 255.14 x 22.4 L

Volume of 255.14 mol of $CO_2(g)$ = 535.8 L

Hence, 535.8 L volume(in L), at STP, of carbon dioxide produced by the complete combustion of 6.75 lbs of charcoal.

Learn more about the ideal gas here:

brainly.com/question/27691721

#SPJ1

3 0

2 years ago

7. A solution contains a mixture of pentane and hexane at room temperature. The solution has a vapor pressure of 250 torr . Pure

Sliva [168]

Answer:

mole fraction hexane 0.64

Explanation:

We know from Raoult's law of partial pressures that for a binary mixture, the vapor pressure above solution is the sum of the partial pressures of each gas:

P total = P(A) + P(B)

Also the partial pressure of a component is the product of its mole fraction , X, times its pure vapor pressure:

Ptotal = X (A)Pº(A) + X (B)Pº(B)

Since for solution of two components the mole fractions add to one, we now have all the information required to compute the answer.

250 torr = X(hexane)151 torr + ( 1 - X(hexane) )425 torr

250 = 151X(hexane) + 425 - 425 X(hexane)

274 X(hexane) = 175

X(hexane) = 1 -0.6 = 0.64

8 0

3 years ago

Who wants to do my acellus work? Or know how to get the answers ?

MaRussiya [10]

im just answering questions to get points Explanation:

i dont know what points do

6 0

4 years ago

when chlorine gains an electron to become a chloride ion with a -1 charge it ends up with the electron configuration of argon wh

RUDIKE [14]

Answer:

Only number of electrons of Chlorine and argon are going to be same remaining things like mass,reactivity,ionic radii, and so on will be different so if a chlorine gains a electron we can't call it argon!! chlorine is an diatomic gas, argon exist as monoatomic, chlorine can loose that electron and form bond with another cation in order to remove the charge density,, but argon is stable itself!

3 0

3 years ago

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