calcium reacts with sulfur (s8) forming calcium sulfide. what is the theoretical yield (g) of cas(s) that could be prepared from 1.47 g of ca(s) and 4.56 g of sulfur(s)?

As you rise from low light intensity to higher light intensity, the rate of photosynthesis will increase because there is more light available to drive the reactions of photosynthesis.

Answer:

The atomic combinations can be matched to the appropriate functional groups as follows:

- A. C-O-C: C. Ester

- B. O=C-O-H: B. Carboxylic acid

- C. O=C-O-C: C. Ester

- D. C-O-H: A. Alcohol

Explanation:

Answer:

because the two are opposite compounds.

Explanation:

When Chlorine is passed through aqueous sodium fluorine then no reaction takes place between these two because of reactivity order of Fluorine and Chlorine

Displacement reaction is a reaction in which one atom replaces other atom from a molecule on the basis of reactivity strength.

The reason for such reactivity is that as we go down the group the number of shells increases so outermost shell is very far away from the nucleus. If any atom from outside coming to this nucleus then this nucleus is unable to attract the electron of that that atom. Reactivity of halogens is directly proportional to the electronegativity power of that element, that is power to attract electron. Reactivity of halogens decreases down the group.

So Chlorine is less reactive than Fluorine so Chlorine can not replace Fluorine from sodium fluoride. Hence no reaction will take place.

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Answer:

Oxgen- cannot be separated

Water - chemical change

Gold - cannot be separated

Carbon Dioxide - chemical change

Carbon​ - cannot be separated

Explanation:

A pure substance, which can either be an element or a compound, contains only one type of such element or compound. In opposition to a mixture, pure substances cannot be separated by physical means.

- Elements as a pure substance cannot be separated because it contains only one type of atom. However, compounds contain two or more types of atoms, and hence, can only be separated into its individual atoms via chemical means.

In this question, oxygen (O2), Gold (Au) and carbon (C) are all elements and hence cannot be separated. Carbon dioxide (CO2) and water (H2O) are compounds because they contain two different atoms respectively, hence, can be separated into individual atoms.

Answer: The vapor pressure of ethanol at \(26.3^{o}C\) is 238.3 torr.

Explanation:

Given: \(\Delta H_{vap}\) = 38.6 kJ/mol

\(T_{1} = 26.3^{o}C = (26.3 + 273) K = 299.3 K\)

\(T_{2} = 78.4^{o}C = (78.4 + 273) K = 351.4 K\)

Formula used to calculate the vapor pressure of ethanol is as follows.

\(ln\frac{P_{2}}{P_{1}} = \frac{\Delta H_{vap}}{R} [\frac{1}{T_{1}} - \frac{1}{T_{2}}]\\\)

Substitute the values into above formula as follows.

\(ln\frac{P_{2}}{P_{1}} = \frac{\Delta H_{vap}}{R} [\frac{1}{T_{1}} - \frac{1}{T_{2}}]\\ \\ln \frac{760 torr}{P_{1}} = \frac{38600 J}{8.314 J/mol K}[\frac{1}{299.3} - \frac{1}{351.4}]\\\frac{760}{P_{1}} = 3.18\\P_{1} = 238.3 torr\)

Thus, we can conclude that the vapor pressure of ethanol at \(26.3^{o}C\) is 238.3 torr.

The mass number of the atom is 21, the atomic number is 9, and the element is Fluorine. There are 9 protons, 9 electrons, 12 neutrons, and the elemental symbol is F.

For every atom:

In the diagram:

Number of electrons = 9

Number of protons = 9

Number of neutrons = 12

Mass number = 12 + 9

                      = 21

Atomic number = number of protons

                         = 9

Element with atomic number 9 = Fluorine

Symbol of the element = F

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Answer:

Chemistry can help us to understand, monitor, protect and improve the environment around us.

Explanation:

I hope this helps u! :D

The mechanical advantage of the lever that has a 36 cm input arm and a 6 cm output arm is 0.167.

Mechanical advantage is the ratio of the output force produced by a machine (especially a simple machine) to the applied input force.

This means that mechanical advantage of a machine can be calculated by dividing the output force by the input force as follows:

MA = Fb/Fa

Where;

According to this question, a lever has a 36 cm input arm and a 6 cm output arm. The mechanical advantage can be calculated as follows;

MA = 6cm ÷ 36cm

MA = 0.167

Therefore, 0.167 is the mechanical advantage of the lever.

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When helium gas is compressed from 90 kPa and 30°C to 510 kPa in a reversible, adiabatic process, the temperature and volume of the gas change.

The process is reversible, meaning it can be reversed without any energy loss, and adiabatic, meaning there is no heat transfer between the system and the surroundings. As the gas is compressed, the volume decreases and the temperature increases due to the pressure change. The final temperature and volume of the gas depend on the specific heat ratio of helium, which is approximately 1.66. The process is commonly used in gas turbines and other high-pressure applications to increase the efficiency of energy conversion.
In a reversible adiabatic process involving helium gas, compression occurs without heat exchange between the system and its surroundings. Initially, the helium gas is at 90 kPa and 30°C. After compression, the pressure increases to 510 kPa. The adiabatic process follows the equation P1V1^γ = P2V2^γ, where γ is the adiabatic index (approximately 1.67 for helium). Since the process is reversible, the final state can be calculated using the given initial conditions and the equation. During this adiabatic compression, the temperature and volume of the helium gas will also change, affecting its thermodynamic properties.

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To make a 48% solution from 25 g of solute, you would need approximately 52.08 mL of solvent.

To calculate the volume of solvent required, we need to consider the mass percent of the solution. The mass percent is defined as the ratio of the mass of solute to the total mass of the solution, multiplied by 100. In this case, the mass percent is given as 48%.

To find the volume of solvent, we can set up a proportion using the mass percent. Let's assume the total volume of the solution is V mL. We can set up the following equation:

(25 g)/(V mL) = (48 g)/(100 mL)

Cross-multiplying and solving for V, we get:

25V = 48 * 100

V = (48 * 100)/25

V ≈ 192 mL

Therefore, you would need approximately 192 mL of the solvent to make a 48% solution from 25 g of solute.

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Answer:

25% gold.

Explanation:

6 is 25 percent of 24, so 6 karat gold would be 25% gold.

Answer:

Sn has a different charge in each of the compounds.

+2, +4 charges, respectively.  

Explanation:

SnO has subscripts of 1, which means it takes only one of each element to make the compound.

We know that oxygen's charge is -2 from the periodic table.

In order for the compound to be neutrally charged,

Sn + O = 0

Sn - 2 = 0.

So, Sn has a +2 charge.

Likewise with the second compound, we know O has a -2 charge.

Sn + 2*(-2) = 0

Sn - 4 = 0

Sn = +4

+2 and +4 are different charges on the Sn cation.  

Answer:

radiation i think

Explanation:

thts why the solar panels can maķe electricity

The standard entropy change for the reaction is ΔS° = 228.8 J/K·mol.

The standard entropy change, ΔS°, can be calculated using the following equation:

ΔS° = ΣS°(products) - ΣS°(reactants)

where ΣS° represents the sum of the standard entropies of the products or reactants, respectively.

Using the standard entropy values given:

ΔS° = [S°(\(SO_3(g)\)) + S°(\(NO(g)\))] - [S°(\(SO_2(s)\)) + S°(\(NO_2(g)\))]

ΔS° = [(256.2 J/K·mol) + (210.6 J/K·mol)] - [(248.5 J/K·mol) + (240.5 J/K·mol)]

ΔS° = 228.8 J/K·mol

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14.1 mL H₂SO₄ is needed to neutralize solution of NaOH.

Balanced chemical equation for neutralization reaction of sulfuric acid and sodium hydroxide:

H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O

c(H₂SO₄) = 0.3 M = 0.3 mol/L; concentration of sulfuric acid

V(NaOH) = 34.0 mL = 0.034 L; volume of sodium hydroxide

c(NaOH) = 0.25 M = 0.25 mol/L; concentration of sodium hydroxide

n(NaOH) = c(NaOH) × V(NaOH)

n(NaOH) = 0.25 mol/L × 0.034 L.

n(NaOH) = 0.0085 mol; amount of sodium hydroxide

From chemical reaction: n(H₂SO₄) : n(NaOH) = 1 : 2.

n(H₂SO₄) = 0.0085 mol ÷ 2

n(H₂SO₄) = 0.00425 mol; amount of sulfuric acid

V(H₂SO₄) = n(H₂SO₄) ÷ c(H₂SO₄).

V(H₂SO₄) = 0.00425 mol ÷ 0.3 mol/L.

V(H₂SO₄) = 0.0141 L = 14.1 mL; volume of sulfuric acid

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The magnitude of the average force the batter exerted is (-0.145 kg * 410 m/s) / 0.045 s.

Newton's second law of motion, which states that force (F) is equal to the change in momentum (Δp) divided by the time interval (Δt):

F = Δp / Δt

The momentum (p) of an object is calculated by multiplying its mass (m) by its velocity (v):

p = m * v

Given:

Mass of the baseball (m) = 0.145 kg

Initial velocity of the baseball (v) = 410 m/s

Time interval (Δt) = 0.045 s

First, calculate the initial momentum (p_initial) of the baseball:

p_initial = m * v

p_initial = 0.145 kg * 410 m/s

Next, calculate the final momentum (p_final) of the baseball. Since the mass of the baseball remains the same, we can use the equation:

p_final = m * v_final

Since the final velocity (v_final) is not given, we assume it is zero (as the baseball comes to rest after being hit). Thus, the final momentum is zero.

Now, calculate the change in momentum (Δp):

Δp = p_final - p_initial

Δp = 0 - p_initial

Δp = -p_initial

Finally, substitute the values into the equation for average force:

F = Δp / Δt

F = (-p_initial) / Δt

F = (-0.145 kg * 410 m/s) / 0.045 s

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Answer:

Mass of ammonia produced= 34 g            

Explanation:

Given data:

Mass of ammonia produced = ?

Number of moles of nitrogen = 1.0 mol

Solution:

Chemical equation:

N₂ + 3H₂       →    2NH₃

Now we will compare the moles of ammonia and nitrogen.

                   N₂          :          NH₃

                    1           :           2

Mass of ammonia:

Mass = number of moles × molar mass

Mass =    2 mol × 17 g/mol

Mass = 34 g                  

Answer:

The liquid will freeze

Explanation:

well see... all the other answers require INCREASING the temp, so yeah.

please brainliest me. i just gave away 1300 points in the last 24 hours for questions like "what is 1+1"

The volume in the final system that was initially enclosed in a 12.3 liter cylinder with a moveable piston at 300 K and 2.0 atm is 36.9L.

The volume of a given amount of gas can be calculated by using the combined gas law formula as follows;

P1V1/T1 = P2V2/T2

Where;

According to this question, 1.0 mole of a gas is enclosed in a 12.3 liter cylinder with a moveable piston at 300 K and 2.0 atm.

However, half of the gas is removed, leaving 0.50 mole in the cylinder and the system is warmed to 900 K. The volume in the final system can be calculated as follows:

2 × 12.3/300 = 2 × V2/900

0.082 = 2V2/900

73.8 = 2V2

V2 = 73.8 ÷ 2

V2 = 36.9L

Therefore, the volume in the final system that was initially enclosed in a 12.3 liter cylinder with a moveable piston at 300 K and 2.0 atm is 36.9L.

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Answer:

Explanation:

it's 18.45, my sister just got the guestion right! hope it helps :)

folic Acid

Folic acid, often known as folate, is a water-soluble B vitamin that is necessary for the generation of healthy red blood cells and the regular functioning of the brain system. Folate is present in numerous foods, including leafy green vegetables, legumes, nuts, and grains. Numerous processed goods, including breakfast cereals, breads, and rice, contain it as well. Folic acid is essential for pregnant women because it prevents birth abnormalities. It is also crucial for people of all ages since it helps maintain the health and normal operation of the body's cells. Folic acid is also essential for the production and repair of DNA, as well as the breakdown of specific proteins. Without appropriate folic acid, the body cannot produce red blood cells effectively, which can result in anemia. It is essential to consume adequate amounts of folic acid through diet or supplementation.

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Carbon monoxide is the airborne material is not likely to be affected by the filters or indoor air handling equipment. The correct answer is d. carbon monoxide.

Carbon monoxide (CO) is a gas rather than a particulate matter. It is produced by incomplete combustion of fossil fuels, such as gasoline, natural gas, and wood. Unlike particles, which can be filtered out by air handling equipment, carbon monoxide cannot be effectively removed by standard filters or indoor air handling systems.

Carbon monoxide is a colorless, odorless, and tasteless gas that can be extremely harmful when inhaled. It can bind to hemoglobin in the blood, reducing its oxygen-carrying capacity and leading to tissue damage or even death in high concentrations.

To mitigate the risk of carbon monoxide exposure, it is important to ensure proper ventilation in indoor spaces, especially those with potential sources of carbon monoxide, such as gas-powered appliances, fireplaces, or attached garages. Carbon monoxide detectors should be installed in homes and buildings to provide an early warning in case of elevated levels of the gas.

While filters and air handling equipment can help remove particles and pollutants from indoor air, they are not effective in capturing or eliminating carbon monoxide gas. Monitoring and prevention measures are crucial for addressing carbon monoxide exposure risks.

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Traits for larger animals with big horns will be selected.

Approximately 24.55 cm^3 of oxalic acid must be added to sufficient water to give a 1.500 liter solution with a formal concentration of 0.300 F.

To find the volume of oxalic acid needed to make a 1.500 liter solution with a formal concentration of 0.300 F, we need to use the equation:

Formal concentration (F) = (moles of solute) / (volume of solution in liters)

First, we need to calculate the moles of oxalic acid required. The formal concentration (F) is given as 0.300, so:

0.300 = (moles of oxalic acid) / 1.500

Rearranging the equation, we find:

moles of oxalic acid = 0.300 * 1.500

moles of oxalic acid = 0.450

Next, we can calculate the mass of oxalic acid needed using its molecular mass:

mass of oxalic acid = moles of oxalic acid * molecular mass

mass of oxalic acid = 0.450 * 90.03

mass of oxalic acid = 40.5145 g

Finally, we can calculate the volume of oxalic acid needed using its density:

volume of oxalic acid = mass of oxalic acid / density

volume of oxalic acid = 40.5145 g / 1.65 g/cm^3

volume of oxalic acid = 24.55 cm^3

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Answer: X is an Esther

Explanation: alcohol and carboxylate acid forms esters

When a carboxylic acid and alcohol react then-new substance is produced from esterification and hence is called an ester. Thus, option 2 is correct.

Esterification is the process to make esters from carboxylic acids and alcohol in the presence of an acid catalyst (dry sulphuric acid). The -COOH group of the carboxylic acids contributes to the formation of the esters.

The esterification reactions are reversible reactions and occur at a slower pace. The reaction between an acid and alcohol is shown as:

Butanoic acid + 1-pentanol (catalyst) →  water + ester

Therefore, option 2. ester is produced.

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3.6 ×10²⁴ atoms fluorine are in 410 g of UF\(_6\). Fluorine is an atomic number 9 chemical element with both the symbol F.

Fluorine is an atomic number 9 chemical element with both the symbol F. This is the smallest halogen as well as occurs as a very poisonous, pale yellow diatomic vapor under normal circumstances.

It is exceptionally reactive being the most electronegative active catalyst, reacting with all other elements save the light inert.

mole =  410 / 352.02 =1.16mole

number of atom= 1.16× 6.022×10²³=6.98×10²³

number of atom of fluorine =6× 6.98×10²³= 3.6   ×10²⁴ atoms

Therefore, 3.6 ×10²⁴ atoms fluorine are in 410 g of UF\(_6\).

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Answer:

false, The nucleus of atoms still move around like crazy, it's just the electrons move more.