What is the product when magnesium reacts with nitrogen? Mg(s) + N2(g) →
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What type of slide did you make using the letter 'e' in the lab?
b)1.00 mol L KOH (aq)
c)1.00 mol L NaCL (aq)
d)1.00 mol L solution of CaCL2 (aq)
At equal concentrations, which of the following solutions is the most conductive?
a) C6H12O6 (aq)
b) CH3COOH (aq)
c) HClO4 (aq)
d) CH3OH (aq)
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Final answer:
The solution with the highest pH is KOH, because it's a strong base. The most conductive solution would be HClO4, because it's a strong acid and dissociates into ions which are responsible for conducting electricity.
Explanation:
The solution that has the highest pH is b) 1.00 mol L KOH (aq). In the pH scale, lower values (0-6) represent acids, and higher values (8-14) represent bases. As KOH is a strong base, it dissociates completely in water to form K+ and OH- ions, thereby increasing the pH of the solution.
On the other hand, HNO3 is a strong acid and would have a low pH. NaCL and CaCL2 are salts and make neutral solutions, resulting in a pH of around 7.
The most conductive solution at equal concentrations would be c) HClO4(aq). Ionic compounds are good conductors of electricity in a solution since they dissociate into ions. HClO4 is a strong acid and would conduct electricity better than the others. The conductivity is due to the presence of ions which carry the current.
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Final answer:
A 1.00 M solution of KOH (aq) would have the highest pH because it is a strong base. A 1.00 M solution of HClO4 (aq) would be the most conductive as it is a strong, fully ionizing acid that produces a high number of ions.
Explanation:
In terms of pH, a solution of 1.00 M KOH (aq) would have the highest pH. The reason is that KOH is a strong base and it completely dissociates in water to form K+ and OH- ions, the latter of which increase the pH of the solution. HNO3, on the other hand, is a strong acid and would result in a low pH. NaCl and CaCl2 are salts and would result in neutral or slightly acidic or basic solutions, depending on the corresponding acidity or basicity of their constituent ions.
Regarding the conductivity, a 1.00 M solution of HClO4 (aq) would be the most conductive. Conductivity relies on the number of ions present in the solution that are capable of carrying current. HClO4 is a strong, fully ionizing acid producing a high number of ions in the solution. The other solutions either are weak acids like CH3COOH, which ionize only partially, or contain compounds like C6H12O6 and CH3OH that don't ionize at all.
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Answer: and
Explanation: Potassium is a first group metal with one valence electron and so it has +1 charge. Sulfate ion is a polyatomic ion with -2 charge. The compound potassium sulfate has two potassium ions and one sulfate ion and the below equation shows how the ions are written when the compound is dissociated into its ions.
K2SO4 -> 2K+ + SO4^-2.
This is a balanced equation.
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Answer:
3.16 × 10−8
Explanation:
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Answer:
FDA
Explanation:
Answer:
FDA
Explanation: it right ;)
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142.04 g -------------- 6.02x10²³ atoms
?? g ------------------ 7.4x10²³ atoms
142.04 x ( 7.4x10²³) / 6.02x10²³
=> 174.60 g
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Density is defined as the ratio of mass to volume of a substance.
The density of water is generally known to be 1.0 g/mL. Substances that are less dense than water will float on water while substances that are denser than water will sink in water.
We have to calculate the density of the block material in units of g/ml.
Volume of the block = = 19.66 mL
Mass of the block = 350 lb = 158757 g
Density of the block =
Density of block =
= 8075.13 g/mL
Hence the block material will sink in water.
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density of water is approximately 1.0 g/mL
block of material
volume of 1.2 x 10^4 in^3
and weighing 350 lb
Required:
Which will float
Solution:
D = M/V where D is density, M is mass and V is volume
convert 1.2 x 10^4 in^3 into mL
1.2 x 10^4 in^3 (16.39 mL/ 1 in3) = 196,980 mL
convert 350 lb into grams
350 lb (454 grams/1 lb) = 158,900 grams
D = M/V = 158,900 grams/ 196,980 mL
D = 0.807 g/mL
The block will float in water because it is less dense than water