3 years ago

What's difference between "formula unit" and "molecule" ?

1 answer:

6 0

The difference between <span>"formula unit" and "molecule" lies in the fact that a</span> molecule is made up of two or more elements that are bonded covalently while a formula nit represents the lowest whole number ratio of ions in an ionic compound which makes it applicable only to ionic substances.

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What would make a conversion not possible?

MAVERICK [17]

if it is already as low as it can go

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3 years ago

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At 1 atm, how much energy is required to heat 39.0 g of h2o(s at –24.0 °c to h2o(g at 121.0 °c?

earnstyle [38]

Q = mcΔt, q = energy [J] m = mass (of water) [g]; c = specific heat capacity of water [J g⁻¹ K⁻¹/°C⁻¹]; Δt = change in temperature [K/°C]
Δt = 121 - -24 = 145
q = 39 × 4.18 × 145
q = 23637.9 J

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3 years ago

What did you observe in the reaction of phosphoric acid with the freshly cleaned zinc when compared with a piece just taken out

mash [69]

Answer:

The classification is mentioned below for the particular topic.

Explanation:

Whether we position 2 different beakers in such a single beaker through one clean edge of zinc-containing H₃Po₄ and another one with unflushed zinc.

The zinc that was washed set to release hydrogen gas way quicker, unlike unventilated zinc.

⇒ $3Zn+2H_{3}Po_{4}\rightarrow Zn_{3}(Po_{4})_{2}+3H_{2}$

Since fresh zinc complicates the cycle since, as a comparison to polluted zinc, there was little contact with either the reaction.

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3 years ago

Emma strikes a match and sets some logs on fire. As the fire burns, which two forms of energy are released?

Ivanshal [37]

Answer:

Explanation:

There are changes in the chemical composition of the word.

There's light energy given off.

There's heat energy given up.

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2 years ago

The remains of plants and animals

nirvana33 [79]

Answer: The remains of plants and animals are called organic matter.

Explanation:

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3 years ago