The movement of electrons causes:

A pipet is a type of glassware that is used to deliver a specified volume of liquid. A 5 mL pipette has major scale divisions ma

Yakvenalex [24]

Answer:

The uncertainty due to the equipment on chemistry equipment is equal to +-1/2 of the smallest unit marked in your equipment; in this case you have a pipette and its sameelst mark is 0.1 mL, so the uncertainty will be 0.05 mL. If you divide 0.05 mL / 3.2 mL and multiply it by 100 you get 1.56% of uncertainty if you measure 3.2 mL, so it will be proper to report the measurement and also the uncertainty.

6 0

3 years ago

Which of the following is NOT a strong acid or strong base?

Phoenix [80]

Magnesium hydroxide Mg(OH)₂ is a weak base.

Explanation:

Sulfuric acid H₂SO₄ and hydrochloric acid HCl are, both of them, very strong acids.

Sodium hydroxide NaOH and potassium hydroxide KOH are hydroxides of metals from the first group in the periodic table so thy are strong bases.

As you go to the second group in the periodic table, the hydroxides will not dissociate as much as the hydroxides from the first group in the periodic table , so they will be weak bases. This is the case of magnesium hydroxide Mg(OH)₂.

Learn more about:

acid and bases

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4 0

3 years ago

Steam reforming of methane ( CH4 ) produces "synthesis gas," a mixture of carbon monoxide gas and hydrogen gas, which is the sta

sertanlavr [38]

Answer: The pressure equilibrium constant for the reaction is $4.5\times 10^0$

Explanation:

We are given:

Initial partial pressure of methane = 0.60 atm

Initial partial pressure of water vapor = 2.6 atm

Equilibrium partial pressure of hydrogen gas = 1.4 atm

The chemical equation for the reaction of methane gas and water vapor follows:

$CH_4+H_2O\rightleftharpoons CO+3H_2$

Initial: 0.60 2.6

At eqllm: 0.60-x 2.6-x x 3x

Evaluating the value of 'x':

$\Rightarrow 3x=1.4\\\\x=0.467$

So, equilibrium partial pressure of methane gas = (0.60 - x) = [0.60 - 0.467] = 0.133 atm

Equilibrium partial pressure of water vapor = (2.6 - x) = [2.6 - 0.467] = 2.133 atm

Equilibrium partial pressure of carbon monoxide gas = x = 0.467 atm

The expression of $K_p$ for above equation follows:

$K_p=\frac{p_{CO}\times (p_{H_2})^3}{p_{CH_4}\times p_{H_2O}}$

Putting values in above equation, we get:

$K_p=\frac{0.467\times (1.4)^3}{0.133\times 2.133}\\\\K_p=4.517\times 10^0$

Hence, the pressure equilibrium constant for the reaction is $4.5\times 10^0$

8 0

3 years ago

In the equilibrium system below, which of the following changes would cause the equilibrium position to shift to the right? CO(g

Lubov Fominskaja [6]

We are given with the equation that produces methane and water from the raection of hydrogen gas and carbon monoxide. This is expressed in the balanced equation: 3H2 + CO = CH4 + H2O. This is an exothermic process. The change that would shift the equilibrium to the right is lowering the temperature of the reaction.

4 0

3 years ago

Summarize the difference between a legal law and a scientific law

ddd [48]

Scientific Law is proven by the demoonstration of an irrefutable fact - for instance The Law of Gravity.
Legal law refers to the body of man-made statutes passed by mankind in order to govern and control civilization and humanity.

3 0

4 years ago

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