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3 years ago

True or false nothing is smaller than atom

Chemistry

1 answer:

Papessa [141]3 years ago

3 0

False. there are quarks, gluons, electrons and nuetrions.

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A molecule with the formula ax4e uses _________ to form its bonds.

nadya68 [22]

Is it multiple choice?? Im thinking
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A molecule with the formula ax4e uses sp3d to form its bonds.</span>

7 0

3 years ago

Chemistry help!

Norma-Jean [14]

Refer to the attachment.

Hope this helps you...

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2 years ago

The mole fraction of CO2 in a certain solution with H2O as the solvent is 3.6 × 10−4. What is the approximate molality of CO2 in

nataly862011 [7]

Answer: C) 0.020 m

Explanation:

Molality of a solution is defined as the number of moles of solute dissolved per kg of the solvent.

$Molality=\frac{n\times 1000}{W_s}$

where,

n = moles of solute

$W_s$ = weight of solvent in g

Mole fraction of $CO_2$ is = $3.6\times 10^{-4}$ i.e. $3.6\times 10^{-4}$ moles of $CO_2$ is present in 1 mole of solution.

Moles of solute $(CO_2)$ = $3.6\times 10^{-4}$

moles of solvent (water) = 1 - $3.6\times 10^{-4}$ = 0.99

weight of solvent = $moles\times {\text {Molar mass}}=0.99\times 18=17.82g$

Molality = $\frac{3.6\times 10^{-4}\times 1000}{17.82g}=0.020$

Thus approximate molality of $CO_2$ in this solution is 0.020 m

5 0

3 years ago

I set up the conversion factor as 1 mol H20 / 18.02 g H2O because?

Andrej [43]

Answer:

How many grams of H2O are in 1.0 mole of H2O?

18.02 grams

The average mass of one H2O molecule is 18.02 amu. The number of atoms is an exact number, the number of mole is an exact number; they do not affect the number of significant figures. The average mass of one mole of H2O is 18.02 grams.

#Yourchuu

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3 years ago

5. Thomson's experiments with cathode rays led to the discovery of the:<br> electron<br> Neutron

Alex_Xolod [135]

Electron because it’s more valid than neutron

7 0

3 years ago