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3 years ago

Graciella divided her grapes equally among 6 friends. If each friend received 16 grapes how many grapes did Graciella have?

Chemistry

2 answers:

Artemon [7]3 years ago

7 0

Answer:

taiks

Explanation:

DIA [1.3K]3 years ago

3 0

Answer: She had 96 grapes.

Explanation:

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What does the atomic mass of a neutral atom tell you?

ExtremeBDS [4]

Answer:

yes

Explanation:

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3 years ago

How many molecules of SrCrO4 are in a sample of SrCrO4 0.556 moles?

Amiraneli [1.4K]

Answer:

$3.35*10^{23}\ SrCrO_4\ molecules$

Explanation:

$We\ are\ given\ that,\\No.\ of\ moles\ of\ SrCrO_4=0.556\\Hence,\\As\ we\ know\ that,\\No.\ of\ particles=Avagadro's\ Constant*No.\ of\ moles\\We\ already\ know\ that\ Avagadro's\ Constant=6.022*10^{23}\\Here,\\No.\ of\ SrCrO_4\ molecules= 6.022*10^{23}*0.556\\Hence,\\No.\ of\ SrCrO_4\ molecules=3.348*10^{23} molecules\ \approx 3.35*10^{23}\ SrCrO_4\ molecules$

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3 years ago

Activation energy is what kind of chemical reaction that absorbs energy

seraphim [82]

Activation energy is the energy required by reactants to undergo chemical reaction and given products

Every reactant has some internal energy (sum of all kind of energy like kinetic energy, potential energy, mechanical energy, chemical energy etc). It needs some extra energy to undergo chemical reaction which is activation energy

All kinds of reaction whether exothermic or endothermic needs activation energy

Threshold energy = internal energy + activation energy

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3 years ago

Why do the two electrons spend their time equally between both hydrogen atoms? In other words, why can’t one hydrogen just take

vekshin1

Because it is a covalent bond meaning that they share the electrons to achieve full valence.

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3 years ago

How many moles of argon, Ar, are in 1.31×1024 Ar atoms?

ddd [48]

Answer:

2.18 mol Ar.

Explanation:

Hello there!

In this case, according to the definition of mole as the amount of particles of a given substance, it is possible to introduce the Avogadro's number to assert that 1 mole of any element contains 6.022x10²³ atoms; thus, the moles of Ar in the given amount of atoms turns out to be:

$1.31x10^{24}Ar atoms*\frac{1molAr}{6.022x10^{23}atoms}\\\\=2.18molAr$

Best regards!

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3 years ago