Does ice sink or float,and why?

1 answer:

6 0

An Explanation -
Why Ice Floats. A substance floats if it is less dense, or has less mass per unit volume, than other components in a mixture. For example, if you toss a handful of rocks into a bucket of water, the rocks, which are dense compared to the water, will sink. The water, which is less dense than the rocks, will float.

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9 Cardiac disease is a major problem in the United States."

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Answer:

D It affects the heart

Explanation:

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The shielding of electrons gives rise to an effective nuclear charge, Zeff, which explains why boron is larger than oxygen. Esti

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Zeff = Z - S

Here, Z is the number of protons in the nucleus, that is, atomic number, and S is the number of nonvalence electrons.

For boron, the electronic configuration is 1s₂ 2s₂ 2p₄

Z = 5, S = 2

Zeff = 5-2 = +3

For O, electronic configuration is 1s₂ 2s₂ 2p₄

Z = 8, S = 2

Zeff = 8-2 = +6

Hence, the correct answer is second option, that is, +3 and +6, the Zeff of boron is smaller in comparison to O, thus, boron exhibits a bigger size than O.

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The volume of a gas is 22.4 L when the pressure of the atmosphere is 1.00 atm. If the pressure is increased to 1.05 atm, without

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Answer:

b I think

explanation

they're all false tho

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3 years ago

Write chemical equations for the following electrolytes dissolving in water

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$1)NaCl=>Na^{+}+Cl^{-}\\2)PbSO_{4}=>Pb^{2+}+SO_(4)^{2-}$

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Identify the solute and solvent in a solution made from 15 mL of oxygen and 5 mL of helium.

Marina CMI [18]

Answer:

Oxygen is solvent and Helium is solute.

Explanation:

Helium is a complety inert gas which do not react with other compounds whereas, oxygen can take part in chemical reaction with many compounds.

if we mix 15 mL of oxygen and 5mL of helium then the oxygen is the solvent and helium is solute.
In a mixture the compound with the greater volume is solvent and the compound with lwss volume is solute.
in this case, oxygen has greater volume than that of helium so oxygen is solute and helium is solvent here.

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