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Paladinen [302]
3 years ago
15

ALL I ask is you answer correctly I'm having a bad day ! :(

Chemistry
1 answer:
Lilit [14]3 years ago
7 0

Answer:

i have no clue whats going on here but imma act like i do.....

Explanation:

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The boiling point of water is also the same as its' ___________ point
Helga [31]
212°F (100°C) I think
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4 years ago
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Is the total disappearance of all members of a species.
OLga [1]

Answer: EXTINCTION

Explanation:

4 0
3 years ago
If the azeotropic mixture is 72% perchloric acid by mass, what is the mole percent of water in the azeotrope?
WARRIOR [948]

Answer:

Mole percent of water in azeotrope is 69%

Explanation:

Clearly, the azeotrope consists of water and perchloric acid.

So, 72% perchloric acid by mass means 100 g of azeotrope contains 72 g of perchloric acid and 28 g of water.

Molar mass of water = 18.02 g/mol and molar mass of perchloric acid = 100.46 g/mol

So, 72 g of perchloric acid = \frac{72}{100.46}mol of perchloric acid = 0.72 mol of perchloric acid

Also, 28 g of water = \frac{28}{18.02}mol of water = 1.6 mol of water

Hence total number of mol in azeotrope = (1.6+0.72) mol = 2.32 mol of azeotrope

So, mole percent of water in azeotrope = [(moles of water)/(total no of moles)]\times 100%

Mole percent of water  = \frac{1.6}{2.32}\times 100 % = 69%

3 0
4 years ago
What is the percent rate of change in function y = \((0.99)^x\)? Determine whether the function represents exponential growth or
storchak [24]

Answer: The correct answer is 1%: exponential decay.

Explanation: We are given a function:

y=(0.99)^x   ...(1)

To determine the percentage rate of change in function, we compare the given function with the general form of exponent function, which is:

y=a(1+r)^x    ...(2)

Comparing both the equations, we get:

1+r=0.99

r=-0.01

We take 'r' in percentage, so converting this above value in percentage, we get:

r=-0.01\times 100=-1\%

As the value of 'r' is negative, it means that the exponent is decaying, so the percentage rate of change in function will be 1% and it will be exponential decay.

6 0
3 years ago
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Calculate the number of moles of magnesium, chlorine, and oxygen atoms in 4.50 moles of magnesium perchlorate, mg(clo4)2. expres
Eva8 [605]
<span>4.50, 9.00, 36.00 First, count the number of atoms of each element in a single molecule of Mg(ClO4)2. Mg = 1 atom Cl = 1 * 2 = 2 atoms O = 4 * 2 = 8 atoms Now multiply the number of atoms of each element per molecule of the compound by the number of moles of the compound. So Mg = 1 * 4.50 = 4.50 Cl = 2 * 4.50 = 9.00 O = 8 * 4.50 = 36.00 So the answer is 4.50, 9.00, 36.00</span>
7 0
4 years ago
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