Can someone explain how my teacher got that result in acceleration

Answer:

Approximately [tex]64\%[/tex].

Explanation:

[tex]\displaystyle \text{Percentage Yield} = \frac{\text{Actual Yield}}{\text{Theoretical Yield}} \times 100\%[/tex]

The actual yield of [tex]\rm O_2[/tex] was given. The theoretical yield needs to be calculated from the quantity of the reactant.

Balance the equation for the hydrolysis of water:

[tex]\rm 2\, H_2O \, (l) \to 2\, H_2\, (g) + O_2\, (g)[/tex].

Note the ratio between the coefficient of [tex]\rm H_2O\, (g)[/tex] and [tex]\rm O_2\, (g)[/tex]:

[tex]\displaystyle \frac{n(\mathrm{O_2\, (g)})}{n(\mathrm{H_2O\, (aq)})} = \frac{1}{2}[/tex].

This ratio will be useful for finding the theoretical yield of [tex]\rm O_2\, (g)[/tex].

Look up the relative atomic mass of hydrogen and oxygen on a modern periodic table.

Calculate the formula mass of [tex]\rm H_2O[/tex] and [tex]\rm O_2[/tex]:

[tex]M(\mathrm{H_2O}) =2\times 1.008 + 15.999 = 18.015\; \rm g \cdot mol^{-1}[/tex].

[tex]M(\mathrm{O_2}) =2\times 15.999 = 31.998\; \rm g \cdot mol^{-1}[/tex].

Calculate the number of moles of molecules in [tex]9.8\; \rm g[/tex] of [tex]\rm H_2O[/tex]:

[tex]\displaystyle n(\mathrm{H_2O}) = \frac{m(\mathrm{H_2O})}{M(\mathrm{H_2O})} = \frac{9.8\; \rm g}{18.015\; \rm g \cdot mol^{-1}} \approx 0.543991\;\rm g \cdot mol^{-1}[/tex].

Make use of the ratio [tex]\displaystyle \frac{n(\mathrm{O_2\, (g)})}{n(\mathrm{H_2O\, (aq)})} = \frac{1}{2}[/tex] to find the theoretical yield of [tex]\rm O_2[/tex] (in terms of number of moles of molecules.)

[tex]\begin{aligned} n(\mathrm{O_2}) &= \displaystyle \frac{n(\mathrm{O_2\, (g)})}{n(\mathrm{H_2O\, (aq)})} \cdot n(\mathrm{H_2O}) \\ &\approx \frac{1}{2} \times 0.543991\; \rm mol \approx 0.271996\; \rm mol \end{aligned}[/tex].

Calculate the mass of that approximately [tex]0.271996\; \rm mol[/tex] of [tex]\rm O_2[/tex] (theoretical yield.)

[tex]\begin{aligned}m(\mathrm{O_2}) &= n(\mathrm{O_2}) \cdot M(\mathrm{O_2}) \\ &\approx 0.271996\; \rm mol \times 31.998\; \rm g \cdot mol^{-1} \approx 8.70331 \; \rm g \end{aligned}[/tex].

That would correspond to the theoretical yield of [tex]\rm O_2[/tex] (in term of the mass of the product.)

Given that the actual yield is [tex]5.6\; \rm g[/tex], calculate the percentage yield:

[tex]\begin{aligned}\text{Percentage Yield} &= \frac{\text{Actual Yield}}{\text{Theoretical Yield}} \times 100\% \\ &\approx \frac{5.6\; \rm g}{8.70331\; \rm g} \times 100\% \approx 64\%\end{aligned}[/tex].

Answer:

A. Physical science is the study of energy and inanimate matter. Life science is the study of living organisms.

Explanation:

Sciences can be grouped into physical science and life sciences. PHYSICAL SCIENCE is a branch of science that involves the study of energy and inanimate objects i.e lifeless. Physical science encompass the following: physics, chemistry, astronomy, geology etc.

On the other hand, LIFE SCIENCES, as the name implies, is the study of living organisms. It is also referred collectively to as BIOLOGICAL SCIENCES and it includes aspects such as biology, botany (plant), zoology (animal), microbiology (microbes), biochemistry etc.

Answer:

its a for plato

Explanation:

Answer:

that can be established only by changing a substance's chemical

Explanation:

Answer:

A chemical property is a characteristic of a substance abserved in chemical reactions.

Explanation:

Some major chemical properties include flammability, toxicity, heat of combustion, pH value, rate of radioactive decay, and chemical stability.

Answer:

The answer options provided are incorrect. The correct answer is 0.009g

Explanation:

Using PV = nRT

Where;

P = pressure (atm)

V = volume (L)

R = gas constant (0.0821 Latm/Kmol)

T = temperature (K)

n = number of moles

Based in the information provided;

V = 107mL = 107/1000 = 0.107L

P = 104.8kPa = 104800 Pa = 1.03atm

T = 30°C + 273.15 = 303.15K

PV = nRT

1.03 × 0.107 = n × 0.0821 × 303.15

0.1102 = 24.89n

n = 0.1102/24.89

n = 0.0044 mol

mole = mass/molar mass

Molar mass of H2 = 2g/mol

mass = molar mass × mole

mass = 2 × 0.0044

mass = 0.0088

mass = 0.009g

Answer:

Deep zone, surface zone and transition zone.

Answer:

Explanation:

Answer:

Atomic number is the number of protons in an isotope or element.

Explanation: The atomic number is the same number of protons in an element or isotope and if said isotope is neutral than it is the same number of electrons.

Example: Atomic number = 19 Protons = 19 if neutral Electrons = 19

Answer:

1 g

Explanation:

Given data:

Volume of solution = 250 mL (250 mL × 1 L/1000 mL = 0.25 L)

Molarity of solution = 0.1 M

Amount of sodium hydroxide = ?

Solution:

Molarity = number of moles / volume in L

0.1 M = number of moles /0.25 L

Number of moles = 0.1 M × 0.25 L

            M = mol/ L

Number of moles = 0.025 mol

Mass of sodium hydroxide:

Mass = number of moles × molar mass

Mass = 0.025 mol ×40 g/mol

Mass = 1 g

Answer:

The answer is B

Explanation:

2Na + 2H2O = 2NaOH + H2

Answer:

Nickel

Explanation:

Answer:

well because with the velocity of the two, using the second law, it can slow the velocity before there is a casualty.

Explanation:

Answer:

1.88 x 10^5

Explanation:

You have to round because all of the numbers in 187515.4207 are significant

Round to: 188000

Put in scientific notation:

1.88 x 10^5

Answer:

well scientific notation would be = 1.875154207 × 10^5

you cant rlly simply the number any further to get 3 sig figs

youd need something like 187 to be 3 sig figs

are you saying the question correctly?

Answer:

Protons

Protons are another type of subatomic particle found in atoms. They have a positive charge so they are attracted to negative objects and repelled from positive objects.

Explanation:

Answer:

it will float back up because it's not dense enough to go down

Answer:

B) Because modern corals live in warm, shallow seas, we can infer the same

environment existed during the Devonian period, where the Kimberleys are

today

Explanation:

Based on the law of Uniformitarianism we can infer the environment that existed during the formation of the Devonian limestone and the Barrier Reef today.

Answer: B

Explanation: USA test prep, K12

Answer:

Explanation: A.0

Answer:

are you aking an NWEA?

Explanation:

Answer:

Explanation:

The new pressure can be found by using the formula for Boyle's law which is

[tex]P_1V_1 = P_2V_2[/tex]

Since we are finding the new pressure

[tex]P_2 = \frac{P_1V_1}{V_2} \\[/tex]

From the question we have

[tex]P_2 = \frac{2 \times 760}{1.8} = \frac{1520}{1.8} \\ = 844.4444...[/tex]

We have the final answer as

Hope this helps you

Answer:

They do have a larger chance, but others might be infected too.

PLS GIVE BRAINLIEST

Answer:

thats false, yes they have a bigger chance but anyone can get it.

Explanation:

Answer:

Positively Charged

Explanation:

The is a group XVI and period 4 element of the periodic table with similar physical and chemical to that of tellurium and sulfur. Selenium exist in different allotropic forms, which have different solubility including selenate, selenite and selenium in elemental form

The Se ion in selenate has a positive charge of +6, while the selenate ion has a charge of -2

The Se ion in selenite has a charge of +4, while the selenite ion has a negative charge of -2.

The charge of Se in elemental selenium is 0.

Answer: 6751 L

Explanation:

1000 mL = 1 L

so dividing 6751 by 1000 gives .6751 L

Answer:

Iconic bonds.

Answer: D

Explanation:

Answer:

Small streams that flow into larger streams and wetlands

Explanation:

Hope this helps, have a great day (;

Answer:

D

Explanation:

verifyed got me the answer!

Answer:

Sodium + Water = Sodium Hydroxide + Dihydrogen

Explanation:

eaction of sodium with water

Sodium metal reacts rapidly with water to form a colourless solution of sodium hydroxide (NaOH) and hydrogen gas (H2). The resulting solution is basic because of the dissolved hydroxide. The reaction is exothermic.

Answer:

Diphosphanium

Explanation:

mark brianliest

Answer:

Here is your answer

Explanation:

Mg and sr