Oil is
so it will
dissolve in water.

Answer:

[tex]\boxed {\boxed {\sf 836.8 \ Joules \ lost}}[/tex]

Explanation:

Since we are given the mass and change in temperature, we should use the following formula for heat.

[tex]q= mc \Delta T[/tex]

In this formula, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature.

We know the mass of the water is 10 grams. We will have to look up water's specific heat, because it is not given. It is 4.184 J/g °C.

Let's find the change in temperature. This is the difference of the final and initial temperature. The water started at 80 °C and cooled to 60°C.

Now we have values for each variable.

Substitute the values into the formula.

[tex]q= 10 \ g * 4.184 \ J/g \textdegree C * -20 \textdegree C[/tex]

Multiply the first 2 numbers. The units of grams will cancel each other out.

[tex]q= 41.84 \ J/ \textdegree C * -20 \textdegree C[/tex]

Multiply again. This time, the degrees Celsius cancel.

[tex]q= -836.8 \ J[/tex]

A total of 836.8 Joules are lost.

Answer: the answer is a

The partial pressure of Xe in the mixture is 1.850 atm. (partial pressure of Xe = Total pressure - Partial pressure of He - Partial pressure of Ar = 1.850 atm).

To find the partial pressure of Xe, we need to subtract the partial pressures of He and Ar from the total pressure.

Total pressure = partial pressure of He + partial pressure of Ar + partial pressure of Xe

Given:

Total pressure = 2.40 atm

Partial pressure of He = 0.300 atm

Partial pressure of Ar = 0.250 atm

Let's solve for the partial pressure of Xe:

Partial pressure of Xe = Total pressure - Partial pressure of He - Partial pressure of Ar

Partial pressure of Xe = 2.40 atm - 0.300 atm - 0.250 atm

Partial pressure of Xe = 1.850 atm

Therefore, the partial pressure of Xe in the mixture is 1.850 atm.

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Answer:

I think 2.6 sorry if its wrong

The number of moles of 18.3 grams of lithium is equal to 2.62 mol.

A mole can be defined as a metric unit that is used to evaluate a count of particles in the sample of a given substance. The particles counted are generally identical chemical entities, but they are individually distinct.

A mole is used for a large number of quantities of molecules, atoms, ions, or other specific particles. The number of chemical compounds or elements can be measured in the terms of moles.

The number of units of the chemical which are present in 1 mole is equal to 6.023 × 10 ²³  refers to Avogadro’s constant.

Given, the mass of lithium in the sample = 18.2 g

The mass of one mole of lithium = 6.94 g

6.94 grams of lithium has moles = 1 mol

18.2 g of lithium has moles of Li = 18.2/6.94 = 2.62 mol

Therefore, the moles in 18.2 g of Lithium is 2.62 mol.

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Answer:

C) Children grow taller when they use the energy from the food molecule, but all of the molecules leave the body as waste.

hope it helps.

Answer:

C - Children grow taller when they use the energy from the food molecules, but all of the molecules leave the body as waste.

hope it is helpful to you ☺️☺️☺️☺️

Answer:

0.2878 liters

Explanation:

It is possible to make 0.2878 liters of 4 M solution of lithium bromide using 100 grams of the compound.

Explanation:

NiCl2 + KOH = NiOH + KCl

since nickel is the primary element in nickel ii chloride, find the oxidation no of nickel in the compound and chlorine should have 2 as a subscription since the ii in the compound represents that nickel has an oxidation no of 2

An ideal gas is one that follows the gas laws at all conditions of temperature and pressure. To do so, the gas would need to completely abide by the kinetic-molecular theory. On the other hand, a real gas is a gas that does not behave according to the assumptions of the kinetic-molecular theory.

Furthermore, the particles of an ideal gas are extremely small and have a mass equivalent to practically zero. Ideal gas particles also have no volume.

An example of a real gas is helium, oxygen, and nitrogen.

Answer:

I don't understand the question

Explanation:

what is your name

Answer:

Advantage: Hydropower is a fueled by water, so it's a clean fuel source.

Advantage: It is a domestic source of energy in the US.

Disadvantage: Fish populations can be impacted if fish cannot migrate upstream past impoundment dams to spawning grounds or if they cannot migrate downstream to the ocean.

Disadvantage: Hydropower plants can be impacted by drought. When water is not available, the  hydropower plants can't produce electricity.

Explanation:

Answer:

186.3g

Explanation:

4.5moles of K₂CO₃  is in 1000ml

? moles of K₂CO₃ is in 300 ml

(4.5 × 300)/ 1000 = 1.35 moles of K₂CO₃

1 mole of K₂CO₃ = (39 × 2) + 12 + (16 × 3) = 78 + 12 + 48 = 138g

1.35 moles of K₂CO₃  = ?

= (1.35 × 138)/1 = 186.3g

Answer:

Molarity of NaOH = 1.8 M.

Explanation:

From the question given above, the following data were obtained:

Mass of NaOH = 36 g

Molar mass of NaOH = 40 g/mol

Volume = 500 mL

Molarity of NaOH =?

Next, we shall determine the number of mole in 36 g of NaOH. This can be obtained as follow:

Mass of NaOH = 36 g

Molar mass of NaOH = 40 g/mol

Mole of NaOH =?

Mole = mass / molar mass

Mole of NaOH = 36 / 40

Mole of NaOH = 0.9 mole

Next, we shall convert 500 mL to L. This can be obtained as follow:

1000 mL = 1 L

Therefore,

500 mL = 500 mL × 1 L / 1000 mL

500 mL = 0.5 L

Finally, we shall determine the molarity of NaOH. This can be obtained as follow:

Mole of NaOH = 0.9 mole

Volume = 0.5 L

Molarity of NaOH =?

Molarity = mole / Volume

Molarity of NaOH = 0.9 / 0.5

Molarity of NaOH = 1.8 M

Answer:

63.7 °C

Explanation:

Step 1: Given and required data

Step 2: Calculate the final temperature of the water (T₂)

We will use the following expression.

Q = c × m × (T₂ - T₁)

T₂ = Q/c × m + T₁

T₂ = 3.85 × 10³ cal/(1 cal/g.°C) × 75.4 g + 12.6 °C = 63.7 °C

Answer:

84672 J

Explanation:

From the question given above, the following data were obtained:

Height (h) = 72 m

Combined mass (m) = 120 Kg

Acceleration due to gravity (g) = 9.8 m/s²

Energy (E) =?

We can obtain the energy by using the following formula:

E = mgh

Where

E => is the energy.

g => is the acceleration due to gravity

m => is the mass.

h => is the height.

E = 120 × 9.8 × 72

E = 84672 J

Thus, the energy is 84672 J

Answer:

15.32 days

Explanation:

From the question given above, the following data were obtained:

Half-life (t½) = 3.83 days

Original amount (N₀) = 225 g

Amount remaining (N) = 14.06 g

Time (t) =.?

Next, we shall determine the number of half-lives that has elapsed. This can be obtained as follow:

Original amount (N₀) = 225 g

Amount remaining (N) = 14.06 g

Number of half-lives (n) =?

N = N₀ / 2ⁿ

14.06 = 225 / 2ⁿ

Cross multiply

14.06 × 2ⁿ = 225

Divide both side by 14.06

2ⁿ = 225 / 14.06

2ⁿ = 16

Express 16 in index form with 2 as the base

2ⁿ = 2⁴

n = 4

Thus, 4 half-lives has elapsed.

Finally, we shall determine the time. This can be obtained as follow:

Half-life (t½) = 3.83 days

Number of half-lives (n) = 4

Time (t) =.?

n = t / t½

4 = t / 3.83

Cross multiply

t = 4 × 3.83

t = 15.32 days

Therefore the time for 225 g sample of Radon to decay to 14.06 g is 15.32 days

Answer:

c

Explanation:

Nitrous oxide decomposes into nitrogen and oxygen, according to 2 N2O (g) -> 2 N2 (g) + O2 (g). ... In an experiment, a stream of N2O is passed through a tube 25 mm in diameter and 20 cm long. The flow rate of the gas is 0.75 L/min.

Answer:

7 Ways to turn a woman on. ...

Ask her what she likes, and do your homework. ...

Know the three parts of foreplay. ...

Be creative: Not all women are the same. ...

Know her body. ...

Help her feel comfortable receiving oral sex. ...

Play with lube or toys. ...

Remember that great sex won't happen overnight.

Explanation:

Answer: Ask her what she likes, and do your homework. ...

Know the three parts of foreplay. ...

Be creative: Not all women are the same.

Hope this helps

Answer:

Calculate the number of grams of AlCl3 produced from 2.5 moles of Cl2. The reaction between H2 and O2 produced 31.0 g of water. How many grams of O2 reacted?

Explanation:

Answer:

Option A

Explanation:

Addition of too much of solvent will make the solution dilute due to which the crystals will not form. Hence option D is incorrect

On the other hand adding a minimum amount of boiling solvent will give a saturated solution for recrystallization. Hence, option A is incorrect

Addition of cold solvent will lower the rate of formation of crystals. Hence, both option B and C are incorrect

Answer:

[tex]\boxed {\boxed {\sf 856.74 \ g \ C_8H _{18}}}[/tex]

Explanation:

To convert from grams to moles, the molar mass is used. These values tells us the grams in 1 mole of a substance. They can be found on the Periodic Table (they are equivalent to the atomic masses, but the units are grams per mole).

We are given the compound C₈H₁₈. Look up the molar masses of the individual elements.

Notice there are subscripts that tell us the number of atoms of each element. We must multiply the molar masses by the subscripts.

Add these 2 values together to find the molar mass of the whole compound.

Use this number as a ratio.

[tex]\frac{ 114.232 \ g \ C_8H_{18}}{1 \ mol \ C_8H_{18}}[/tex]

Multiply by the given number of moles: 7.5

[tex]7.5 \ mol \ C_8H_{18}*\frac{ 114.232 \ g \ C_8H_{18}}{1 \ mol \ C_8H_{18}}[/tex]

The moles of C₈H₁₈ will cancel each other out.

[tex]7.5 *\frac{ 114.232 \ g \ C_8H_{18}}{1}[/tex]

[tex]7.5 *{ 114.232 \ g \ C_8H_{18}}[/tex]

[tex]856.74 \ g \ C_8H _{18}[/tex]

7.5 moles of C₈H₁₈ is equal to 856.74 grams of C₈H₁₈

Answer:

Bubv amp hindi marunong amp

Answer:

hi

Explanation:

I'm just figuring this out

Answer:

The entropy increases

Explanation:

Just took the quiz

Answer:

a

Explanation:

Answer:

it will be the same on both sides of the membrane

When the pure water is separated from the aqueous sugar solution when the sugar cannot pass through the semipermeable membrane. So the water moves through the membrane to the sugar solution. Therefore, the concentration of sugar solution will be decreased.

Osmosis can be described as the spontaneous net movement or diffusion of solvent molecules through a permeable membrane from a region of lower solute concentration to a higher solute concentration in a direction that tends to balance the solute concentrations on both sides.

A physical process in which any solvent moves across a selectively permeable membrane separating two solutions of different concentrations.

Osmotic pressure can be described as the external pressure needed to be applied so that there is no net movement of a solvent across the membrane. Osmotic pressure can be defined as a colligative property because it depends on the molar concentration of the solute but not on its identity.

Therefore, option (A) is correct.

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Answer:

0.703g Na must reacted

Explanation:

The reaction of Sodium, Na, With water, H₂O is:

2Na(s) + 2H₂O(l) → 2NaOH(aq) + H₂(g)

Where 2 moles of sodium reacts with an excess of water to produce 1 mole of hydrogen

To solve this question we have to use PV = nTR to solve the moles of the gas. With the moles of hydrogen we can find the moles of sodium that reacted and its mass:

Moles H₂:

PV = nRT

PV /RT = n

Where P is pressure = 1.15atm

V is volume in liters = 0.325L

R is gas constant = 0.082atmL/molK

T is absolute temperature = 25°C + 273 = 298.0K

1.15atm*0.325L / 0.082atmL/molK*298.0K = n

0.0153 moles of hydrogen are produced

Moles Na:

0.0153 moles H₂ * (2moles Na / 1mol H₂) = 0.0306 moles Na

Mass Na -Molar mass: 22.99g/mol-:

0.0306 moles Na * (22.99g / mol) =

Answer: D. 48.75

Explanation: just took the test

Answer:

D

Explanation:

I got this question right on my test.