2 years ago

The boiling process is considered to be____

Chemistry

1 answer:

Dmitry_Shevchenko [17]2 years ago

5 0

your answer is D. physical change, because a new substance is not formed.

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What coefficient should be placed before 02? 2S+ __02 → 2S03

Trava [24]

Explanation:

$\tt{2S+6O_2\implies{2SO_3} }$

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2 years ago

What is the charge on an atom after it gains two electrons during the formation of a bond?

vekshin1

Answer:

two negative charges is the answer of your question

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2 years ago

The density of potassium, which has the BCC structure, is 0.855 g/cm3. The atomic weight of potassium is 39.09 g/mol. Calculate

Nimfa-mama [501]

Answer:

lattice parameter = 5.3355x10^-8 cm

atomic radius = 2.3103x10^-8 cm

Explanation:

known data:

p=0.855 g/cm^3

atomic mass = 39.09 g/mol

atoms/cell = 2 atoms

Avogadro number = 6.02x10^23 atom/mol

a) the lattice parameter:

Since potassium has a cubic structure, its volume is equal to:

v = [(atoms/cell)x(atomic mass)/(p)x(Avogadro number)]

substituting values:

v =[(2)x(39.09)/(0.855x6.02x10^23)]=1.5189x10^-22 cm^3

but as the cell volume is

a^3 =v

$a=\sqrt[3]{v}=\sqrt[3]{1.5189x10^{-22} } = 5.3355x10^-8$ cm

for a BCC structure, the atomic radius is equal to

$r=\frac{ax\sqrt{3} }{4}=\frac{5.3355x10^{-8}x\sqrt{3} }{4}=2.3103x10^{-8}cm$

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3 years ago

What is the number of ions in 0.20 mol of (NH4)3PO4?

neonofarm [45]

Answer:

hey, it's B

Explanation:

1 mol= 6.022×10²³ ions

0.2 mol= 0.2 × 6.022 × 10²³ ions

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3 years ago

When salt is dissolved in water, water is the

stich3 [128]

Water is solvent, salt is solute, reactants are H2O and NaCl, and the whole thing is solution

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3 years ago