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svetlana [45]
2 years ago
14

Part G

Chemistry
1 answer:
notka56 [123]2 years ago
8 0

Answer:

Therefore the theoretical density of iron is 7.877 g/cm³ .

Therefore the number of vacancy per cm³ is

Explanation:

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A certain liquid has a normal boiling point of and a boiling point elevation constant . A solution is prepared by dissolving som
irinina [24]

Answer:

m_{KBr}=6.030gKBr

Explanation:

Hello.

In this case, since the normal boiling point of X is 117.80 °C, the boiling point elevation constant is 1.48 °C*kg*mol⁻¹, the mass of X is 100 g and the boiling point of the mixture of X and KBr boils at 119.3 °C, we can use the following formula:

(T_b-T_b_0)=i*m*K_b

Whereas the Van't Hoff factor of KBr is 2 as it dissociates into potassium cations and bromide ions; it means that we can compute the molality of the solution:

m=\frac{T_b-T_b_0}{i*K_b}=\frac{(119.3-117.8)\°C}{2*1.48\°C*kg*mol^{-1}}\\  \\m=0.507mol/kg

Next, given the mass of solventin kg (0.1 kg from 100 g), we compute the moles KBr:

n_{KBr}=0.507mol/kg*0.1kg=0.0507mol

Finally, considering the molar mass of KBr (119 g/mol) we compute the mass that was dissolved:

m_{KBr}=0.0507mol*\frac{119g}{1mol} \\\\m_{KBr}=6.030gKBr

Best regards.

3 0
3 years ago
State the importance of Nitrous oxide
schepotkina [342]
The inducible isoform (NOS<span>-2) is calcium-independent and produces large amounts of </span>gas<span> that can be cytotoxic. </span>NOS<span> oxidizes the guanidine group of L-</span><span>arginine in a process that consumes </span>five<span> electrons and results in the formation of NO with stoichiometric formation of L-citrulline. </span>
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3 years ago
Write the balanced chemical equations of the following reaction: Hydrogen and oxygen react to form water.
timofeeve [1]
H2 + O = H2O
Hydrogen is a diatomic molecule and reacts with oxygen to create Water or H2O
4 0
3 years ago
Which of the following represents the greatest number of moles? please help! :)
zloy xaker [14]

Answer:

Helium

Explanation:

He- 3.99739969150064 (4)

S-0.498986433806336 (0.5)

Li-3.02550064832148 (3)

B-2.959948200906496 (3)

5 0
3 years ago
Read 2 more answers
Column A
vampirchik [111]

Answer:

a. pH paper can tell you the pH. pH paper only can turn a variety of colors that represent different pH numbers.

B. Litmus paper only tells you acid or base in order to turns red or blue color.

Explanation:

pH paper is a type of paper which is used for the identification of pH of the substance. On pH paper, colors are present which shows pH numbers of a solution while litmus paper is a type of paper which is used for the identification of solution whether it is acidic or basic. There are two colors i. e. Red and Blue. If the litmus paper turns red, the solution is acidic or if the litmus paper turns blue, the solution is alkaline or basic.

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