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bixtya [17]
2 years ago
15

What is the atomic number and the mass number of an atom with 11 protons and 12 neutrons?

Chemistry
1 answer:
sleet_krkn [62]2 years ago
8 0

Answer:

e

Explanation:

e

e

e

e

ee

e

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How many milliliters of a 3.0 M HCL solution are required to make 250.0 milliliters of 1.2 M HCL
tiny-mole [99]
You can use M x V = M' x V'

3 x V = 250 x 1.2

V = 100 ml
5 0
3 years ago
The pressure of a sample of helium is 1.556 atm in a 268.5 mL container. If the container is compressed to 112.4 mL without chan
Rainbow [258]

Answer:

a.  3.72 [atm]

Explanation:

For a gas at constant temperature, (with no change in number of molecules of the gas), we can apply Boyle's Law:  P_1V_1=P_2V_2

(1.556[atm])(268.5[mL])=P_2(112.4[mL])

\dfrac{(1.556[atm])(268.5[mL\!\!\!\!\!\!\!\!{--}])}{112.4[mL \!\!\!\!\!\!\!\!{--}]}=\dfrac{P_2(112.4[mL]\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!{-----})}{112.4[mL]\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!{-----}}

3.716957[atm]=P_2

It seems like the answer should have 4 significant figures since all of the other quantities have 4 significant figures, but the closest answer choice of those provided is a.  3.72

3 0
2 years ago
Modify the given fatty acid so that it represents the 18‑carbon fatty acid designated 18:2(Δ9,12). Draw any double bonds in the
Mekhanik [1.2K]

Answer:

See explanation

Explanation:

In this case, we have to remember the meaning of the nomenclature "18:2Δ9,12".  Where 18 is the <u>number of carbon atom</u>s, 2 is the <u>number of double bonds,</u> and the numbers successive to Δ "delta" the position of the double bonds <u>starting</u> to count from the carboxylic -COOH end of the molecule.

In other words, the main functional group is a <u>carboxylic acid</u>. We have a total of 18 carbons. Additionally, we have 2 double bonds. On carbons 9 and 12.

Lets see figure 1

I hope it helps!

5 0
3 years ago
A compound is found to contain 7.523% phosphorus and 92.48% iodine by weight. what is the empirical formula for this compound?
RUDIKE [14]
The answer is PI3
Ratio of 1:3
5 0
3 years ago
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if the caffeine concentration in a particular brand of soda is 2.87 mg/oz, drinking how many cans of soda would be lethal? assum
aleksklad [387]
Approximately 290 drinks would be lethal
4 0
3 years ago
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