During which step in the Can Crush Lab did the air pressure outside the can become greater than the pressure inside the can?. . A.The can was filled nearly to the top with water.. B.The can was placed on the hot stove burner for several minutes.. C.The can was removed from the hot oven burner.. D.The can was placed upside-down in the water-filled pan.
Answers
The next step is to cool the can suddenly by inverting the water and cause water to vapor in the can to condense
hope this helps
The answer is D. Heating the air in the can reduces the air pressure in the can. When the can is inverted in a pan with cold water, the can collapses inwards. This is because the cold water cooled the air around the outside of the can. Cold air has a higher pressure that hot air because it’s denser. Became. The higher air pressure outside presses on the can walls and force them inwards.
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An aqueous solution of lithium hydroxide contains hydroxide ions as the only negative ion in the solution. Lithium hydroxide is classified as an
b. 17
c. 18
d. 19
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Sulfur has 16 protons, so 35-16 = 19. So there are 19 neutrons present.
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Answer:
protons: 36
neutrons:48
electrons:36
Explanation:
the number of protons in an element is = to the atomic # (36)
the number of neutrons is the atomic mass - atomic # (84-36=48)
In a neutral charged element the # of protons = # of electrons
B. molecular number.
C. valence.
D. atomic number
Answers
The correct answer is:
C. valence.
Explanation:
The valence or valency of an element is a stratagem of its connecting power with other atoms when it makes chemical compounds or molecules.
A valence electron is an outer shell electron that is connected with an atom, and that can compete in the formation of a chemical bond if the outer shell is not closed; in a single covalent bond, both atoms in the bond provide one valence electron in order to form a shared pair
Answer:
C. valence
Explanation:
The valence or valency of an element is a stratagem of its connecting power with other atoms when it makes chemical compounds or molecules.
A valence electron is an outer shell electron that is connected with an atom, and that can compete in the formation of a chemical bond if the outer shell is not closed; in a single covalent bond, both atoms in the bond provide one valence electron in order to form a shared pair.
Answers
Answer:
Molarity of NaOH solution is 1.009 M
Explanation:
Molar mass of HCl is 36.46 g/mol
Number moles = (mass)/(molar mass)
So, 0.8115 g of HCl = HCl = 0.02226 moles HCl
1 mol of NaOH neutralizes 1 mol of HCl.
So, if molarity of NaOH solution is S(M) then moles of NaOH required to reach endpoint is
So,
or, S = 1.009
So, molarity of NaOH solution is 1.009 M
Answers
The statement that is given above “When a system performs work on the surroundings, the work is reported with a negative sign” is true. When the surrounding performs work by the system, it is positive.