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blsea [12.9K]
3 years ago
14

What kind of melocule is water?A:nonpolarB:ionicC:polarD:charged

Chemistry
1 answer:
hram777 [196]3 years ago
6 0
The correct answer is:  [C]:  "polar" .
_____________________________________________________  
   " Water " ; which is:  " H₂O " ; 
_____________________________________________________
is a:
_____________________________________________________

  — polar;  → {eliminate:  "Choice  [A]:  "non-polar"} ;

                  → {and consider:  "Choice: [C]:  "polar" } ; 

  — covalent; → {not "ionic";  eliminate:  "Choice:  [B]:  "ionic"} ;

  — uncharged;  → {neutral compound; not "charged" —but "balanced"} ; 
 
                           →  {Note:   " H ⁺ ,  O ²⁻  ;   →   " H₂O " } ;

                           →  The "charges" balance/ cancel out. 

                           →  {eliminate:  "Choice:  [D]:  "charged" .}.
_______________________________________________________
    — 
compound.
_______________________________________________________       

The correct answer is:  [C]:
 "polar" .
_______________________________________________________
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1 lb of CO2 occupies 0.6 ft^3 at a pressure of 200 psi. Determine the temperature of the system.
Anarel [89]

<u>Answer:</u> The temperature of the system is 273 K

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}  

Given mass of carbon dioxide = 1 lb = 453.6 g   (Conversion factor: 1 lb = 453.6 g)

Molar mass of carbon dioxide = 44 g/mol

Putting values in above equation, we get:

\text{Moles of carbon dioxide}=\frac{453.6g}{44g/mol}=10.31mol

To calculate the temperature of gas, we use the equation given by ideal gas equation:

PV = nRT

where,

P = Pressure of carbon dioxide = 200 psia = 13.6 atm   (Conversion factor:  1 psia = 0.068 atm)

V = Volume of carbon dioxide = 0.6ft^3=16.992L    (Conversion factor:  1ft^3=28.32L )

n = number of moles of carbon dioxide = 10.31 mol

R = Gas constant = 0.0821\text{ L atm }mol^{-1}K^{-1}

T = temperature of the system = ?

Putting values in above equation, we get:

13.6atm\times 16.992L=10.31mol\times 0.0821\text{ L atm }mol^{-1}K^{-1}\times T\\\\T=273K

Hence, the temperature of the system is 273 K

8 0
3 years ago
Write the Henderson-Hasselbalch equation for a solution of formic acid. Calculate the quotient [HCO2]/[HCO2H] at (a) pH 3.000; (
Elena L [17]

Answer:

a. 0.182

b. 1.009

c. 1.819

Explanation:

Henderson-Hasselbach equation is:

pH = pKa + log [salt / acid]

Let's replace the formula by the given values.

a. 3 = 3.74 + log [salt / acid]

3 - 3.74 = log [salt / acid]

-0.74 = log [salt / acid]

10⁻⁰'⁷⁴ = 0.182

b. 3.744 = 3.74 + log [salt / acid]

3.744 - 3.74 = log [salt / acid]

0.004 = log [salt / acid]

10⁰'⁰⁰⁴ = 1.009

c. 4 = 3.74 + log [salt / acid]

4 - 3.74 = log [salt / acid]

0.26 = log [salt / acid]

10⁰'²⁶ = 1.819

3 0
3 years ago
I will give brainliest and 76 points
katen-ka-za [31]

Answer:

number 5 is the answer

Explanation:

8 0
2 years ago
What determines the reactivity of a metal?
fgiga [73]
The reactivity of a metal is determined by how tightly the metal holds onto the electrons in the outermost energy levels (valence electrons)
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15 points!
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Answer:

C: It is the difference between the total kinetic and potential energy in a system.

Explanation:

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