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pantera1 [17]
3 years ago
13

Will I get sick if I lick a marker?

Chemistry
1 answer:
weeeeeb [17]3 years ago
3 0

Answer:

NO  you will not

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To make lemonade, a recipe requires 4 lemons, 30 ounces of sugar, and 2 pints of water. From an average lemon one can squeeze ou
tresset_1 [31]

Answer:

She will need to add 5.6 cups of water

Explanation:

Hi there!

Marta has to dilute the citric acid to 5%.

The dilution factor will be 12%/ 5% = 2.4. Then, Marta will need to dilute the citric acid 2.4 times. If she has 4 cups of the solution, she will need to add water until she completes a volume of (4 cups ·2.4) 9.6 cups to reach the desired concentration.

Then, she will need to add 9.6 - 4 cups water = 5.6 cups of water

Another way to solve this is by using the fact that the mass of citric acid in the concentrated and diluted solution is the same. Then:

mass citric acid concentrated solution = mass citric acid in dilute solution

mass of citric acid = concentration · volume

Then:

initial concentration · volume = final concentration  · volume

12% · 4 cups = 5% · volume

volume = 12% · 4 cups / 5% = 9.6 cups

The final volume of the solution at 5% will be 9.6 cups. So Marta will need 9.6 cups - 4 cups = 5.6 cups water

3 0
4 years ago
What is the balanced form of the chemical equation shown below?
Serga [27]

Answer:

A; 1 C_{12}H_{22}O_{11} + 12 O_{2}  - > 11H_2O +12CO_2

Explanation:

The best way to start solving this problem is to start with the molecule with the most atoms. Since there are 12 carbons on the left, you need 12 on the right so 12 would need to be placed in front of carbon dioxide. Also you need 22 hydrogens and in each molecule of water, there are two hydrogen molecules so you need 11 molecules of water. After balancing you find that you need 24 oxygen on the left so you place the coeffecient 12 in front of the oxygen molecule.

4 0
2 years ago
How many moles of potassium hydroxide are needed to completely neutralize 1.56 mol phosphoric acid?
frez [133]
3KOH + H₃PO₄ ----> K₃PO₄ + 3H₂O
3 moles 1 mole


3 moles KOH ------ 1 mole H₃PO₄
X moles KOH ------ 1,56 mol
X = 3×1,56
X = 4,68 moles of KOH

:)
7 0
3 years ago
Equal numbers of moles of He(g), Ar(g), and Ne(g) are placed in a glass vessel at room temperature. If the vessel has a pinhole-
mrs_skeptik [129]

Answer:

VP as function of time => VP(Ar) > VP(Ne) > VP(He).

Explanation:

Effusion rate of the lighter particles will be higher than the heavier particles. That is, the lighter particles will leave the container faster than the heavier particles. Over time, the vapor pressure of the greater number of heavier particles will be higher than the vapor pressure of the lighter particles.

=> VP as function of time => VP(Ar) > VP(Ne) > VP(He).

Review Graham's Law => Effusion Rate ∝ 1/√formula mass.

4 0
3 years ago
Question 2 how many valence electrons are in a neutral atom of silicon
marshall27 [118]

Si -Atomic number -14 -1s2 2s2 2p6 3s2 3p2 - 4 valence electrons

7 0
3 years ago
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