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Natasha_Volkova [10]
3 years ago
11

Which characteristic is not a characteristic of plastic

Chemistry
1 answer:
nalin [4]3 years ago
6 0
I think it’s option B
You might be interested in
Calculate the pressure in atm, if 0.00825 moles occupies 174 mL at -15 celcius.
Vlad [161]
Answer is: <span>the pressure is 1.12 atm.
</span>n(O₂) = 0.00825 mol, amount of substance.
V = 174 mL ÷ 1000 mL/L = 0.174 L, volume of gas.

<span> T = 15°C = 288.15 K; temperature.
R = 0.08206 L·atm/mol·K, </span>universal gas constant.<span>
Ideal gas law: p·V = n·R·T.
</span>p = n·R·T / V.
p = 0.00825<span> mol · 0.08206 L·atm/mol·K · 288.15 K / 0.174 L.
p = 1.12 atm.</span>


6 0
3 years ago
If the hydroxide ion concentration of a solution is 3.26 x 10-6 M, is it an acidic or a basic solution?
sladkih [1.3K]

Answer: It is a basic solution with pH =8.51

Explanation:

We were given that hydroxide ion concentration [OH-] as 3.26 x 10-6 M

But We know thar

[OH-] [H+] = 1 × 10^-14

To get the Hydrogen ion [H+] concentration, we have that

[H+] = 1 × 10^-14 M/[OH-]

= 1 × 10^-14 M/3.26 x 10-6 M

    =  3.067 x 10^-9 M

But, pH = - log [H+]

Therefore,

pH = - log (3.067 x 10^-9)

pH=8.51

when  pH > 7, The solution is basic, therefore a solution with pH =8.51 is basic.

8 0
3 years ago
Which of the following is a negatively charged particle?
kirza4 [7]

Answer:

B. electron

Explanation:

B. electron

electron is a negatively charged particle

proton is a positively charged particle

7 0
3 years ago
A 0.65 M solution of an unknown amine base is found to be 2.2% ionized at equilibrium. Calculate the value for Kb for this amine
mihalych1998 [28]

The value of Kb of the unknown amine is 3.22 x 10^-4.

Weak electrolytes:

The compound which do not dissociate completely when added to the aqueous solution are called weak electrolytes. The electrolyte and its ions exists in equilibrium. In case of weak base, the equilibrium constant is expressed as Kb.

Calculations:

Step 1:

The percentage of amine ionized at equilibrium is 2.2%.

NH3   +     H2O ------>    NH4+   +    OH-

The concentration of conjugate acid at equilibrium is calculated as:

2.2 = (x/0.65) x 100

x = 0.0143 M

Step 2:

The equilibrium constant (Kb) is calculated as:

Kb = x^2/0.65 - x

= (0.0143)^2/(0.65 - x)

= 3.22 x 10^-4

Learn more about weak electrolytes here:

brainly.com/question/19340043

#SPJ4

6 0
2 years ago
What has a huge impact on the climate on land?
Mademuasel [1]
Pollution has a huge influence on the climate and land 
3 0
4 years ago
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