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Usimov [2.4K]
3 years ago
8

Solids are usually more dense than:

Chemistry
2 answers:
MrMuchimi3 years ago
6 0
Solids are usually more dense than liquids and gases. 
Anna35 [415]3 years ago
3 0
Solids are usually more dense than liquids.  There are few cases where solids are less dense than liquids, one being water.  This is why ice floats in water :)
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What does the word homogenous mean?
kkurt [141]

Answer:

Homogeneous means composed of parts of different kinds; having widely different elements or components.

Explanation:

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3 years ago
The radius of a uranium atom is 149 pm. How many uranium atoms would have to be laid side by side to span a distance of 4.96 mm?
nikitadnepr [17]

Answer:

4960000000 pm

Explanation:

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3 years ago
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A 2.17 gm sample barium reacted completely with water what is the equation for the reaction how many milliliters of dry H2 evole
vaieri [72.5K]

Answer:

400 mL

Explanation:

Given data:

Mass of barium = 2.17 g

Pressure = 748 mmHg (748/760 = 0.98 atm)

Temperature = 21 °C ( 273+ 21 = 294k)

Milliliters of H₂ evolved = ?

Solution:

chemical equation:

Ba + 2H₂O →  Ba(OH)₂ + H₂

Number of moles of barium:

Number of moles = mass/ molar mass

Number of moles = 2.17 g / 137.327 g/mol

Number of moles = 0.016 mol

Now we  will compare the moles of barium with H₂.

                       Ba        :       H₂

                         1         :         1

                  0.016        :     0.016

Milliliters of H₂:

PV = nRT

V = nRT/P

V = 0.016 mol ×  0.0821 atm. mol⁻¹.k⁻¹.L×294 k/0.98 atm

V = 0.39 atm. L/0.98 atm

V = 0.4 L

L to mL

0.4 × 1000 = 400 mL

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Explanation:

Hope this helped <3

4 0
2 years ago
How to test for sugar in your gingerbread
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Answer:

first of all we have to put sugar in bread and we have to add some ginger paste over it

4 0
3 years ago
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