How many grams of NaOH are needed to make 2.00 L of a 0.200 M solution?

Answer:

7.The answer is 2.13 because if u add 3.23 and 4.51 and the answer is 7.74 and u add 2.13 to get 9.87. 3.23 + 4.51 + 2.13 is 9.87

Explanation:

Answer:

pH = 10.75

Explanation:

To solve this problem, we must find the molarity of [OH⁻]. With the molarity we can find the pOH = -log[OH⁻]

Using the equation:

pH = 14 - pOH

We can find the pH of the solution.

The molarity of Ca(OH)₂ is 2.8x10⁻⁴M, as there are 2 moles of OH⁻ in 1 mole of Ca(OH)₂, the molarity of [OH⁻] is 2*2.8x10⁻⁴M = 5.6x10⁻⁴M

pOH is

pOH = -log 5.6x10⁻⁴M

pOH = 3.25

pH = 14-pOH

Answer:

Expof HCl are required to produce 7.50 moles of ZnCl2? 6. Copper ... When 9.34 g of zinc react with excess hydrochloric acid how many grams of zinc chloride will.lanation:

Answer:

This is polar

Explanation:

If the arrows are of different lengths, and if they do not balance each other, the molecule is polar.

If the arrangement is asymmetrical, the molecule is polar.

Hope this helped!!!

Answer: CH4 + 1,5 O2 ⇒ CO + 2 H2O, then multiply numbers by 2

Explanation:

Answer:

the answer is A

Explanation:

Hopefully u get the answer right

Answer:

A

Explanation:

give me thanks not stars

Answer:

carbon electrode: delocalised electrons

molten mixture....: aluminium oxide ions

metal wire: Metal atoms

The free moving charged particles in the following substances are as follows;

Graphite, an allotrope of carbon has Delocalized (free-moving) electrons and these electrons serve to enable conductivity.

Although, cryolite is a bad conductor of electricity, when Molten Aluminium oxide and cryolite is used, the free moving Aluminium ions enable conductivity.

In metal wires, conductivity is solely the responsibility of metal ions.

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A possible solution for maximizing the percentage of hydrogen in discarded wood is to design a machine that can collect more effectively all the gases and separate hydrogen from other gases.

Discarded wood and other products can still produce important elements nitrogen, methane, and hydrogen. This is possible through combustion that releases these elements in a gas.

This is a new method and it is still not completely developed. Due to this, the equipment is not as efficient as one would like, for example, all gases are initially collected together but this is a problem if only one gas is needed.

Based on this, a potential solution would be to create a machine that is more efficient in collecting and separating the gases.

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Answer:

Your answer will be C. 1/32

Answer:

C. 1/32

Explanation:

Answer:

55mL

Explanation:

44g / 0.8g/mL = 55mL

Answer:

There is no picture but the one that is in motion in the picture has kinetic energy.

Explanation:

Kinetic energy is the energy of motion.

hope this helped!

Answer:

.

Explanation:

Some of the glucose required for cellular respiration in humans is obtained by external food source which are rich in carbohydrates.

Cellular respiration is the process in which cells combines the oxygen with the foodstuff molecules, and converting the chemical energy into life sustaining activities as energy.

In the human body, we get the glucose for the cellular respiration from the external food source which are riched in carbohydrates, starch, etc. After converting the chemical energy to glucose then oxygen is absorbed in the lungs and circulate the blood through out the body by red blood cells.

Hence, we get glucose from food source.

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"Desert biome?" that's a funny way to put it. Well, the answer is most likely Mexico, United Stated, and Saudi arabia,

Mexico, Saudi Arabia and United States are countries which have a desert biome.

This is a barren area of landscape which is characterized by little precipitation and isn't best suited for plant or animal life.

Mexico, Saudi Arabia and United States all have the presence of desert biomes in some of its states.

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Answer:

Due its storing and holding ability.

Explanation:

It matter that the material from which the vat is made is metal because this vat is used for storing and holding liquids. Vat is a large container or tank that is used for storing or holding liquids in industrial sector. This vat is made of metal which increases its strength and durability. If the vat is made of wood or plastic so it can't hold huge amount of liquid or chemical due to its weak material so that's why it matters that the substance from which the vat is made is metal or not.

Answer:

Now, the molar solubility of lead(II) phosphate in water is said to be equal to 6.2⋅10−12mol L−1 . This means that in one liter of water, presumably at room temperature, you can only hope to dissolve 6.2⋅10−12 moles of lead(II) phosphate.

Explanation:

Hope this helps!!

Answer Liquid water

Explanation: I'm sure its that answer

Answer:

1.25 mL/s

Explanation:

Your are told that 25.0 mL of H2 was produced 20 seconds. This is equal to rate 25/20 = 1.25 mL/s

When a reaction progresses, the reactant concentration gradually decreases and the product concentration gradually increases. Here the rate of the reaction is 1.25 mL/s.

The rate of a chemical reaction is defined as the rate of decrease of concentration of a reactant or the rate of increase of concentration of a product. The rate of the reaction is usually expressed in units mol L⁻¹s⁻¹. The rate of the reaction are affected by several factors like concentration of the reactants, temperature, etc.

An equation which expresses the experimentally observed rate of a reaction in terms of the molar concentration of the reactants which determine the rate of the reaction is called rate equation.

Here it is seen that 25.0 mL of H2 was produced 20 seconds. So the rate is given as:

Rate = 25/20 = 1.25 mL/s

Thus the rate of the reaction is 1.25 mL/s.

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#SPJ2

Answer:

The capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, etc.

I hope it helps

thanks you

Answer:

I'm pretty sure a lot of them are melting because of global warming

Answer:

The concentration of the 3.2 g of sodium chloride in 8 dm³ of water is 6.845 × 10⁻³ M

Explanation:

The concentration of a solution is given as either the ratio of mass to volume, or the ratio of volume to volume or as molarity

[tex]Concentration, C = \dfrac{Mass}{Volume} = \dfrac{Volume}{Volume} = \dfrac{Number \ of \ moles }{Liters \ of \ solution}[/tex]

The number of moles present in 3.2 g of sodium chloride, 'n', is given as follows;

[tex]n = \dfrac{Mass}{Molar \ mass}[/tex]

The molar mass of sodium chloride, NaCl = 58.44 g/mol

n = 3.2 g/58.44 g/mol = 0.0547570157 moles

8 dm³ = 8 Liters

Therefore, the concentration, C = 0.0547570157 moles/(8 liters) = 6.845 × 10⁻³ M

The concentration of the 3.2 g of sodium chloride in 8 dm³ of water = 6.845 × 10⁻³ Molar solution.

Answer: Energy = 10000J - 2000J = 8000J

Therefore, the energy is dissipated the skier moves down to the slope is 8000J

Explanation:

Answer: A heat energy of 50160 joules are required to heat 15 grams of ice from [tex]-200^{o}C[/tex] to [tex]1400^{o}C[/tex].

Explanation:

Given : mass of ice = 15 g

Convert grams into kg as follows,

[tex]1 g = 0.001 kg\\15 g = 15 g \times \frac{0.001 kg}{1 g}\\= 0.015 kg[/tex]

Initial temperature = [tex]-200^{o}C[/tex]

Final temperature = [tex]1400^{o}C[/tex]

Formula used to calculate the amount of heat energy is as follows.

[tex]q = m \times C \times (T_{2} - T_{1})[/tex]

where,

q = heat energy

m = mass of substance

C = specific heat of substance (ice here has C = [tex]2090 J/kg ^{o}C[/tex])

[tex]T_{1}[/tex] = initial temperature

[tex]T_{2}[/tex] = final temperature

Substitute the values into above formula as follows.

[tex]q = m \times C \times (T_{2} - T_{1})\\= 0.015 kg \times 2090 J/kg^{o}C \times [1400 - (-200)]^{o}C\\= 50160 J[/tex]

Thus, we can conclude that 50160 joules are required to heat 15 grams of ice from [tex]-200^{o}C[/tex] to [tex]1400^{o}C[/tex].

Answer:

The white stuff we know as sugar is sucrose, a molecule composed of 12 atoms of carbon, 22 atoms of hydrogen, and 11 atoms of oxygen (C12H22O11). Like all compounds made from these three elements, sugar is a carbohydrate

Answer:

combustion is fast and destructive it also involves a lot of movement of the atoms where erosion is a slow process that does not involve a lot of energy