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Daniel [21]
2 years ago
5

The list shows the results of six athletes competing in the long jump, which has a target distance of 20 feet.

Chemistry
1 answer:
kati45 [8]2 years ago
7 0

Answer:

Fairly accurate but not precise

Good luck! I hope this helps! <33

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A mixture of gases containing 0.20 mol of SO2 and 0.20 mol of O2 in a 4.0 L flask reacts to form SO3. If the temperature is 25ºC
diamong [38]

Answer : The pressure in the flask after reaction complete is, 2.4 atm

Explanation :

To calculate the pressure in the flask after reaction is complete we are using ideal gas equation.

PV=n_TRT\\\\P=(n_1+n_2)\times \frac{RT}{V}

where,

P = final pressure in the flask = ?

R = gas constant = 0.0821 L.atm/mol.K

T = temperature = 25^oC=273+25=298K

V = volume = 4.0 L

n_1 = moles of SO_2 = 0.20 mol

n_2 = moles of O_2 = 0.20 mol

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

P=(0.20+0.20)mol\times \frac{(0.0821L.atm/mol.K)\times (298K)}{4.0L}

P=2.4atm

Thus, the pressure in the flask after reaction complete is, 2.4 atm

5 0
2 years ago
Draw all of the constitutional isomers of the molecule with formula C3H5Br. Ignore geometric and stereoisomers.
Kay [80]

Answer:

-) 3-bromoprop-1-ene

-) 2-bromoprop-1-ene

-) 1-bromoprop-1-ene

-) bromocyclopropane

Explanation:

In this question, we can start with the <u>I.D.H</u> (<em>hydrogen deficiency index</em>):

I.D.H~=~\frac{(2C)+2+(N)-(H)-(X)}{2}

In the formula we have 3 carbons, 5 hydrogens, and 1 Br, so:

I.D.H~=~\frac{(2*3)+2+(0)-(5)-(1)}{2}~=~1

We have an I.D.H value of one. This indicates that we can have a cyclic structure or a double bond.

We can start with a linear structure with 3 carbon with a double bond in the first carbon and the Br atom also in the first carbon (<u>1-bromoprop-1-ene</u>). In the second structure, we can move the Br atom to the second carbon (<u>2-bromoprop-1-ene</u>), in the third structure we can move the Br to carbon 3 (<u>3-bromoprop-1-ene</u>). Finally, we can have a cyclic structure with a Br atom (<u>bromocyclopropane</u>).

See figure 1

I hope it helps!

7 0
2 years ago
A water treatment plant needs to maintain the pH of the water in the reservoir at a certain level. To monitor this, they take 2
Bumek [7]

Answer:

C.) 0.7967

Explanation:

Hello,

Normal distribution is used here as:

z=\frac{pH_{sample}-pH_{av}}{stand_{dev}*\sqrt{n} }

In this case, the sample's pH is 8.47, the average pH 8.5, standard deviation 0.22 and sample size 37, thus:

z= \frac{8.47-8.5}{0.22/\sqrt{37} }\\z=-0.8295

Now, based on the table for standard normal distribution which comes from a symmetric bell-like graph, the probability is 0.797 which matched with the C answer.

Best regards.

7 0
2 years ago
Sound _____.
zlopas [31]
The answer is the first one that say <span>Travels in longitudinal waves</span>
5 0
2 years ago
Read 2 more answers
Which metals have similar chemical properties? Check all that apply. barium beryllium rubidium radium titanium calcium platinum
forsale [732]

beryllium & calcium are the two in the same column or family

6 0
2 years ago
Read 2 more answers
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