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3 years ago

1.) C6H12O6 (aq) is a(an)?

Chemistry

1 answer:

Marina86 [1]3 years ago

8 0

Answer:

1) D. Dissolved Molecule

2) C. 11.30 M

Explanation:

Q1:

Glucose (C₆H₁₂O₆) is a non-polar molecule.

When it is dissolved in water, it will be a dissolved molecule.

It can not be ionized in water.

So, the right choice is: D. Dissolved molecule.

Q2:

The molarity is the no. of moles of dissolved solute in a 1.0 L of the solution.

M = (n)solute (1000/V (mL) of the solution)

n of LiCl = 2.60 mol, V = 230.0 mL.

∴ M = (n)solute (1000/V (mL) of the solution) = (2.60 mol)(1000)/(230.0 mL) = 11.30 M.

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PLEASE HELP ME ANSWER

ELEN [110]

It’s metric system dude

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3 years ago

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Calculate the energy released when 24.8 g Na2O reacts in the following reaction.

gizmo_the_mogwai [7]

Answer:

= 48.077 kcal

Explanation:

The balanced equation is :

$Na_{2}O(s)+2HI(g)\rightarrow 2NaI(s)+H_{2}O(l)$

$\Delta H=-120Kcal$

Since the stoichiometric coefficient of Na2O = 1 hence its heat is

-120 Kcal/mol rather -120 Kcal only.

This means when 1 mole of the Na2O is burned , then 120 kcal of energy is released .

Molar mass of Na2O = 2(mass of Na) + 1(mass of O)

= 2(22.98)+16

=61.97 gram/mol

Molar mass = mass of the substance in grams present in 1 mole of it.

In 1 mole of Na2O , 61.97 gram of it is present.

Hence

61.97 gram of Na2O = -120 Kcal of heat is released

1 gram of Na2O =

$/frac{-120kcal/mol}{61.9gram/mol}$

So,

24.8 gram of Na2O will produce,

$/frac{-120kcal/mol}{61.9gram/mol}/times 24.8$

= -48.077 kcal of heat

You can also proceed through mole concept:

Calculate number of moles in 24.8 gram Na2O

$Moles=\frac{given\ mass}{Molar\ mass}$

Moles of Na2O = 24.08/61.9 = 0.4007 moles

So these many moles will produces:

0.4007 x 120

=-48.07

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3 years ago

Can ultraviolet rays be felt by your skin but can not be seen by your eyes? If not then what is it

Sindrei [870]

Yes it can actually!

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4 years ago

(Giving brainliest)

Aneli [31]

It would repel some of the negatively charged electrons of the wall so the answer would be C. The wall and the ballon repel each other

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3 years ago

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A scientist has a 98,3 g sample of silicon, How many silicon atoms are in the sample?

Leno4ka [110]

The number of silicon atoms that are in this sample is: B. $2.11 \times 10^{23} \;atoms$

Given the following data:

Mass of silicon = 98.3 grams

Scientific data:

Avogadro's number = $6.02 \times 10^{23}$

Molar mass of silicon = 28.09 g/mol.

To determine the number of silicon atoms that are in this sample:

First of all, we would determine the number of moles contained in 98.3 grams of silicon.

$Number\;of\;moles = \frac{mass}{molar\;mass}\\\\Number\;of\;moles = \frac{98.3}{28.09}$

Number of moles = 3.4995 moles

By stoichiometry:

1 mole of silicon = $6.02 \times 10^{23}$ atoms

3.4995 moles of silicon = X atoms

Cross-multiplying, we have:

$X = 6.02 \times 10^{23} \times 3.4995\\\\X= 2.11 \times 10^{23} \;atoms$

Read more on atoms here: brainly.com/question/10614569

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2 years ago