The density of iron is 7.87 g/cm3. The density of nickel is 8.91 g/cm3. A cube of each metal is placed into a cup of water. They
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Answer:
C) 0.28 M
Explanation:
Considering:
Potassium hydroxide will furnish hydroxide ions as:
Given :
<u>For Potassium hydroxide : </u>
Molarity = 0.25 M
Volume = 40.0 mL
The conversion of mL to L is shown below:
1 mL = 10⁻³ L
Thus, volume = 40.0×10⁻³ L
Thus, moles of hydroxide ions furnished by Potassium hydroxide is same as the moles of Potassium hydroxide as shown below:
Moles of hydroxide ions by Potassium hydroxide = 0.01 moles
Barium hydroxide will furnish hydroxide ions as:
Given :
<u>For Barium hydroxide : </u>
Molarity = 0.15 M
Volume = 60.0 mL
The conversion of mL to L is shown below:
1 mL = 10⁻³ L
Thus, volume = 60.0×10⁻³ L
Thus, moles of hydroxide ions furnished by Barium hydroxide is twice the moles of Barium hydroxide as shown below:
Moles of hydroxide ions by Barium hydroxide = 0.018 moles
Total moles = 0.01 moles + 0.018 moles = 0.028 moles
Total volume = 40.0×10⁻³ L + 60.0×10⁻³ L = 100×10⁻³ L
Concentration of hydroxide ions is:
<u> The final concentration of hydroxide ion = 0.28 M</u>
Answer : The correct option is, (a) paramagnetic with two unpaired electrons.
Explanation :
According to the molecular orbital theory, the general molecular orbital configuration will be,
As there are 14 electrons present in the given configuration.
The molecular orbital configuration of molecule will be,
The number of unpaired electron in the given configuration is, 2. So, this is paramagnetic. That means, more the number of unpaired electrons, more paramagnetic.
Hence, the correct option is, (a) paramagnetic with two unpaired electrons.
Given:
Mass of methanol, m = 18754 kg
Density of methanol, ρ = 0.788 g/cm³
By definition, the volume of methanol in the collection tank is
Volume = mass/density
Answer: 2.38 x 10⁷ g/cm³
Mass of methanol, m = 18754 kg
Density of methanol, ρ = 0.788 g/cm³
By definition, the volume of methanol in the collection tank is
Volume = mass/density
Answer: 2.38 x 10⁷ g/cm³