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Airida [17]
3 years ago
6

Calculate the molarity of a solution made by dissolving 5.00 g of glucose (C6H12O6) in sufficient water to form exactly 100 mL o

f solution.
Chemistry
2 answers:
matrenka [14]3 years ago
6 0
I think it’s 2.7 moldm-3
avanturin [10]3 years ago
4 0

Answer:

0.28 mol {dm}^{ - 3}

Explanation:

given; 5.00g equivalent to 100mL

5.00g = 100mL

convert 100mL to dm³

100mL is 100milliLitre

milli = 10^-3

100mL = 100 × (10^-3)

= 10^2 × 10^-3

=

{10}^{2 - 3}

= 10^-1 L

1l  = 1 {dm}^{3}

therefore, 10^-1 L = 10^-1 dm³

Relative Atomic Mass of;

C=12, H=1, O=16

Molar mass of glucose (C6H12O6)

= 12×6 + 1×12 + 16×6

= 180g/mol

Now convert the mass given to mole using;

mole \:  =  \frac{mass}{molar \: mass}

mole \:  =  \frac{5.00}{180}

mole = 0.028 mol

therefore, 0.028 mol is equivalent to 10^-1 dm³

10^-1 dm³ = 0.028mol

divide both sides by 10^-1 to get 1dm³

1 {dm}^{3}  =   \frac{0.028 \: mol}{ {10}^{ - 1} }

= 0.28 mol

molarity \:  = 0.28mol {dm}^{ - 3}

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How do the metals in group 1 compare with the transition metals?
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Answer:

Group 1 metals and transition metals are different from each other, mainly based on the colour of the chemical compounds that they form. The key difference between group 1 metals and transition metals is that the group 1 metals form colourless compounds, whereas the transition metals form colourful compounds.

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8 0
3 years ago
match the number of negative charges to the number of positive charges to make each combination balanced (see image for answer)
BartSMP [9]

Answer : The correct match is:

1 positive charge = 1 negative charge

2 positive charges = 2 negative charges

3 positive charges = 3 negative charges

Explanation :

As we now that there are three subatomic particles which are protons, electrons and neutrons.

The protons and neutrons are located inside the nucleus and electrons are located around the nucleus.

The protons are positively charged, the electrons are negatively charged and neutrons are neutral.

As we know that all the things are made up of charges and opposite charges attract to each other.

In a neutral atom, the positive charges and negative charges are balanced in an object. That means, in neutral atom the number of positive charges are equal to the negative charges.

So we can say that:

1 positive charge = 1 negative charge

2 positive charges = 2 negative charges

3 positive charges = 3 negative charges

5 0
3 years ago
The diagram shows ice being heated on a stove over time. What is the sequence of the states of matter as the ice is
Bond [772]

Answer:

The correct answer is D

Explanation:

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Your welcome!

8 0
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