How is skepticism important to the progress of science in this scenario?
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An aqueous solution of methyl alcohol (molar mass = 32.05 g/mol) is prepared by dissolving 15.0 mL of the alcohol (d = 0.792 g/mL) in 75.0 mL of water (1.00 g/mL).a. Calculate the mass % of the aqueous alcohol solution. b. Calculate the molarity of the aqueous alcohol solution. c. If 5.0 mL of the solution (above) is diluted to a volume of 50.0 mL, what is the molarity (M) of the resulting dilute solution?
The rate law for a hypothetical reaction is rate = k [A]2. When the concentration is 0.10 moles/liter, the rate is 2.7 × 10-5 M*s-1. What is the value of k?
What is the final concentration of a solution prepared by diluting 35.0 ml of 12.0 m hcl to a final volume of 1.20 l? what is the final concentration of a solution prepared by diluting 35.0 ml of 12.0 m hcl to a final volume of 1.20 l?
Which type of attraction can be used to explain the high boiling point of H2O?1. ionic bonding2. hydrogen bonding3. polar covalent bonding4. nonpolar covalent bonding
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chemical energy
electrical energy
mechanical energy
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You need know that for to balance the reaction.
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Answer:
- Alkali metals react with water to produce hydroxide and hydrogen gas.
Explanation:
That is a chemical property of alkali metals: they are highly reactive and react vigorously with water to produce the correspondant hydroxide and hydrogen gas.
These are some of those reactions:
- 2Li (s) + 2H₂O (l) → 2LiOH (aq) + H₂(g) ↑
- 2Na (s) + 2H₂O (l) → 2NaOH (aq) + H₂(g) ↑
- 2K (s) + 2H₂O (l) → 2KOH (aq) + H₂(g) ↑
The alkali metals are the elements of group 1 of the periodic table: Li, Na, K, Rb, Cs, and Fr. They have one valence electron which may lose easily to form an ion with charge +1.
Final answer:
Alkali metals react with water to produce hydrogen gas and a basic solution of the metal hydroxide (for instance, sodium hydroxide when lithium is in the reaction). This reaction signifies the easier oxidation of alkali metals compared to hydrogen.
Explanation:
When alkali metals react with water, they form hydrogen gas and a basic solution of the metal hydroxide. This vigorous reaction reveals that alkali metals are easier to oxidize than is hydrogen. For instance, considering the reaction of lithium with water:
2Li(s) + 2H₂O(l) --> 2NaOH(aq) + H₂(g)
The solid state (s) lithium reacts with liquid water to generate hydrogen gas and the ionic compound sodium hydroxide. This sodium hydroxide, which is a solid in its pure form, promptly dissolves in water.
The same kind of reaction occurs with other alkali metals and also some alkaline earth metals, although beryllium and magnesium are exceptions.
Learn more about Reaction of Alkali Metals with Water here:
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AmyLase digests starches, and protease digests Proteins!
B) The box's velocity will be 1 m/s.
C) The box's velocity will not change.
D) The box will experience acceleration.
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Answer: Option (D) is the correct answer.
Explanation:
The rate of change in velocity over change in time is defined as acceleration.
Mathematically, Acceleration =
where = change in velocity
= change in time
Therefore, when a force of 2 N to the left and 3 N to the right then box will experience acceleration as velocity is also changing with time.
Thus, we can conclude that a box experiences a force of 2 N to the left and 3 N to the right then it is true that the box will experience acceleration.