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Fudgin [204]
4 years ago
8

Why does ice float in liquid water? the high surface tension of liquid water keeps the ice on top. stable hydrogen bonds keep wa

ter molecules of ice farther apart than water molecules of liquid water. the crystalline lattice of ice causes it to be denser than liquid water. the ionic bonds between the molecules in ice prevent the ice from sinking?
Chemistry
1 answer:
cupoosta [38]4 years ago
3 0
<span>Stable hydrogen bonds keep water molecules of ice farther apart than water molecules of liquid water.</span>
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Will a tower of straws hold tennis balls
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Yes if you build it right it could easily work, i suggest using tape or rope if it's allowed to help support the structure....

3 0
3 years ago
Read 2 more answers
What would barium do to obtain a noble gas structure? gain 2 electrons lose 2 electrons gain 6 electrons lose 6 electrons
Tema [17]

Answer:

Lose two electrons.

Explanation:

Barium is present in group 2.

It is alkaline earth metal.

Its atomic number is 56.

Its electronic configuration is Ba₅₆ = [Xe] 6s².

In order to attain the noble gas electronic configuration it must loses its two valance electrons.

When barium loses it two electron its electronic configuration will equal to the Xenon.

The atomic number of xenon is 54 so barium must loses two electrons to becomes equal to the xenon.

4 0
4 years ago
Which description BEST describes a particle that contains 18 electrons, 18 neutrons and 16 protons?
Arlecino [84]

Answer:

C

Explanation:

C) an atom with an atomic number of 18

5 0
3 years ago
Determine the number of moles of the anhydrous salt present after heating, assuming that the contents of the aluminum cup after
lara31 [8.8K]

Answer:

0.2 moles, assuming weight of dried salt

Explanation:

In order to determine the number of moles, we need to be aware of the mass of the substance in question.

Assuming the mass of the dehydrated KAl(SO_{4} )_{2}.H_{2} O is 50g.

No. of moles = mass of substance/ molar mass of the substance.

= \frac{50g}{39+27+32*2+16*4*2\\)g/mol}

= 0.2 moles moles.

6 0
3 years ago
A 4 L sample of gas at 298 K and 2 atm contains 0.250 mol of gas. If we add another 0.250 mol of gas at the same pressure and te
andrey2020 [161]

Answer:

V_2=8L

Explanation:

Hello there!

In this case, considering the Avogadro's gas law, which treats the volume and moles in a directly proportional way via:

\frac{V_1}{n_1}=\frac{V_2}{n_2}

Which can be solved for the final volume, V2, as shown below:

V_2=\frac{V_1n_2}{n_1}

Thus, by plugging in the given data, we obtain:

V_2=\frac{4L*(0.250mol+0.250mol)}{0.250mol}\\\\V_2=8L

Regards!

4 0
3 years ago
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