How many moles of magnesium (Mg) are there in 96.3 g of Mg?

Answer: 682 grams

Explanation:

The balanced chemical reaction is:

[tex]4Fe+3O_2\rightarrow 2Fe_2O_3[/tex]

[tex]O_2[/tex] is the limiting reagent as it limits the formation of product and [tex]Fe[/tex] is the excess reagent.

According to stoichiometry :

3 moles of [tex]O_2[/tex] produce = 2 moles of [tex]Fe_2O_3[/tex]

Thus 6.40 moles of [tex]O_2[/tex] will produce=[tex]\frac{2}{3}\times 6.40=4.27moles[/tex]  of [tex]Fe_2O_3[/tex]

Mass of [tex]Fe_2O_3=moles\times {\text {Molar mass}}=4.27moles\times 159.69g/mol=682g[/tex]

Thus 682 g of [tex]Fe_2O_3[/tex] will be produced from 6.40 moles of oxygen

Answer:

Yes (In a closed (or sealed) system, the total mass of reactants and products will remain the same.)

Explanation:

Answer:

they are the same

Explanation:

^_^

Answer:

Explanation:

The melting point of a substance is the temperature at which its melt. The state of a substance is dependent on it's melting temperature. Generally, melting point above 25 °C is a solid.

This means phenol is a solid

Duodecane has melting point below 25 °C hence it is either a liquid or gas. However its boiling point of 216 °C means it would require higher temperature to boil it. Since 25 °C is less than 216 °C it means that it would remain in the liquid state.

Methane has melting point below 25 °C hence it is either a liquid or gas. However its boiling point of -164 °C means it boils easily even at very low temperatures. Since 25 °C is greater than -164 °C it means that it would exist in the gaseous state

Answer:

Light receptors within the eye transmit messages to the brain, which produces the familiar sensations of color. Newton observed that color is not inherent in objects. Rather, the surface of an object reflects some colors and absorbs all the others. We perceive only the reflected colors.

Answer:

the greatest source of light in the ocean is the sun.

Answer:

k = 0.0866 days⁻¹

Explanation:

The isotope decay of the atom follows the equation:

ln [A] = -kt + Ln[A]₀

Where [A] is the amount of the isotope after time t = 8.25mg

Time = 12.8days

k is rate constant

[A]₀ is actual amount of the isotope = 25.0mg

Replacing:

ln 8.25mg = -k*12.8days + ln 25.0mg

2.11 - 3.22 = -k*12.8days

-1.11 = -k12.8days

k = 0.0866 days⁻¹

Answer:

There are two major categories of energy: renewable and non-renewable.

Non-renewable energy resources are available in limited supplies, usually because they take a long time to replenish. The advantage of these non-renewable resources is that power plants that use them are able to produce more power on demand. The non-renewable energy resources are:

Renewable resources, on the other hand, replenish themselves. The five major renewable energy resources are:

While renewable energy resources have the advantage of unlimited supply over the long haul, they are limited in their availability at any given moment.

For example, the sun rises each day, but its ability to generate power is limited when its cloudy. Another disadvantage is that power plant operators can’t crank up renewable energy production when people are consuming more power, such as on a hot day when many people are running air conditioners at the same time.

Answer/Explanation:

Let's define both terms

Boiling: is defined as a process whereby the liquid state is turned into gaseous state at a specific boiling point. And it is a fast process.

Evaporation: is defined as a process whereby a natural process in which the increase in temperature or pressure causes liquid to change into gas.

Difference between boiling and evaporation

In boiling, temperature of the liquid remains constant. While in evaporation, temperature of the liquid reduces

In boiling, temperature is required only at boiling point while in evaporation, temperature occurs at any given temperature.

In boiling, bubbles are formed while in evaporation, bubbles are not formed.

In boiling, a source of energy is required while in evaporation, the surrounding supplies the energy required.

Boiling produces heat and does not lead to liquid cooling, evaporation leads to liquid cooling.

The molecules of the liquid move faster in boiling than in evaporation

Answer:

Ok so I know the answer is not B, cones do not grow on the second stage.

Explanation:

I took the test my self and I choose that one and it was wrong. Sorry if this doesn't help I will put the correct answer one here someday

Answer:

the answer is b

Explanation:

because its the only true onE and i hope i dont fail soooooo

Answer:

B. Periodic electrons

Answer:

Number of protons in Carbon - 14 atom [tex]6[/tex]

Explanation:

The atomic number of carbon 14 atom is [tex]14[/tex]

Number of neutrons in the nucleus of Carbon-14 atom [tex]= 8[/tex]

Atomic number is equal to the sum of neutrons and protons

Number of protons in Carbon - 14 atom [tex]= 14 -8 = 6[/tex]

Answer:

Mg

Hope this helps :D sorry if im wrong :(

I'm pretty sure its D because if it's manufactured and distributed its likely not toxin or poison. a narcotic could be a controlled substance so that's why I'm leaning towards D

Answer:

........................

Answer:

45) Ca < Co < Se

46) Te < S < O

Explanation:

These questions are talking about periodic trends. Here are some things to know about periodic trends:

Electronegativity

Atomic Radius

Ionization Energy

Metallic Character

Hope this helps :)

Explanation:

2-metylbutene should be the profuct

Answer:

1. B

2. C

3. B or D

6. A

7. D

8. A

9. A

Explanation:

Brainliest plz answered to the best of my abilitys

2.5 × 10²³ atoms Al

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

42 mol Al

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 2 sig figs.

2.52924 × 10²³ atoms Al ≈ 2.5 × 10²³ atoms Al

Answer: they giving you some hard question

Explanation:

i dont know  know what the answer is do you have any answer options

8 moles and I hope that this helps

Answer:

Explanation:

From the given information;

Let Q(t) = mass of dye in the tank as a function of time

The mass in the tank = 200 L × (1g/L) = 200 g

Using the law of mass conservation;

[tex]\dfrac{dQ}{dt} = \text{(Rate of incoming mass)- (rate of outgoing mass)}[/tex]

[tex]\dfrac{dQ}{dt} = (2 L/min ) (0 \ g/L) - (2 L/min ) (\dfrac{Q}{200}g/L)[/tex]

[tex]Q' = \dfrac{-Q}{1000}[/tex]

Q(0) = 200

By finding the solution to the ODE using the method of separation of variables;

[tex]\dfrac{Q'}{Q} = -0.01[/tex]

[tex]Q(t) = Ce^{-0.01t}[/tex]

Using the initial condition;

200 = Q(0) = C

[tex]Q(t) = 200e^{-0.01t}[/tex]

1% of 200g = 2g of dye solution

∴

[tex]2 = 200e^{-0.01t}[/tex]

[tex]e^{-0.01t}=0.01[/tex]

[tex]t =\dfrac{ In(0.01}{-0.01}[/tex]

t = 460.5 hours

Answer:

"I used to think a lot about electricity, and now I think..."

or a synonym of it.

Explanation:

Answer:

i guess

Explanation:

we will never know

Answer:

gas

Explanation:

Answer:

Explanation:

See  attached file .

The number of possible isomers of Bromodimethylbenze are 6. One of the isomers is 2 Bromo - m -xylene. The number of possible isomers of an aromatic compound [tex]\rm C_7H_8O[/tex]  are 5. One of these isomers has been o - cresol.

(a). Bromodimethylbenze has also been known as bromoxylene. The compound has been consisted of 1 benzene ring with 2 methyl groups and a bromine atom.

The possible isomers of bromoxylene are:

(b). Aromatic compound with formula [tex]\rm C_7H_8O[/tex] has been the benzene compound. The compound has been consisted of a benzene ring with 1 methyl group and oxygen atom.

The possible isomers of  [tex]\rm C_7H_8O[/tex] are:

Thus, the number of possible isomers of Bromodimethylbenze are 6. One of the isomers is 2 Bromo - m -xylene. The number of possible isomers of an aromatic compound [tex]\rm C_7H_8O[/tex]  are 5. One of these isomers has been o - cresol.

For more information about isomers, refer to the link:

https://brainly.com/question/12796779

Answer:

The atmospheres of Jupiter and Saturn are made almost entirely of hydrogen and helium, although there is some evidence they contain hydrogen compounds. The there is Uranus and Neptune that are made primarily of hydrogen compounds, with smaller traces of hydrogen, helium, metal and rock.

Explanation:

Hope this helps.