If 0.890g of potassium and 0.590g of chromium react with 0.727g of oxygen, what is the empirical formula of the compound

Answer:I think it's in the same column as a sodium on the periodic table because chemical properties are based on their electron structure and the columns called groups are elements with the same shell structure which increases in mass as you go down the column, therefore the elements which are similar to sodium must be in the same group.

Explanation:

Answer:

The answer should be A. Adding carbon to iron makes it tougher and stronger.

The addition of carbon atom to iron metal, enhances the property of hardness of metal.

Alloy is a compound which is formed by the mixture of two or more than two metals with different properties to make a new compound with better properties.

When we add carbon atom in the iron metal, it deviates the crystal lattice property of iron and makes it more harder. So, the content of carbon in the iron is directly proportional to the hardness of iron metal.

Hence, option (A) is correct i.e. hardness.

To know more about hardness, visit the below link:
https://brainly.com/question/18173707

The percent composition of each element's mass in LiClO3 is as follows:

Percent Composition of Li =7.68%,

Percent Composition of Cl = 33.7%,

Percent Composition of O =53.1%.

It is necessary to know the molar masses of the constituent parts. We have:

Molar Mass Li = 6.94 grams per mole

Molar Mass Cl = 30.45 grams per mole

Molar Mass O = 16 grams per mole

Molar Mass LiClO3 = 90.39 grams per mole

Percent Composition of Li:

Utilizing the molar masses of Li and the specified compound:

\(\% \mathrm{Li}=\frac{6.94 \frac{\mathrm{g}}{\mathrm{mol}}}{90.39 \frac{\mathrm{g}}{\mathrm{mol}}} \times 100\)

%Li =7.68%

Percent Composition of Cl:

Using the molar mass of Cl and the molar mass of the given compound

\(\% \mathrm{Cl}=\frac{30.45 \frac{\mathrm{g}}{\mathrm{mol}}}{90.39 \frac{\mathrm{g}}{\mathrm{mol}}} \times 100\)

%Cl = 33.7%

Percent Composition of O:

Utilizing the molar masses of O and the specified compound:

\(\% \mathrm{O}=\frac{3 \times 16 \frac{\mathrm{g}}{\mathrm{mol}}}{90.39 \frac{\mathrm{g}}{\mathrm{mol}}} \times 100\)

%O =53.1%

To know more about Percent composition visit:

https://brainly.com/question/17505281

#SPJ9

The new molar concentration (M) of the diluted solution when added 2.5L of water to 0.5 L of 8.50 M solution is 1.42M.

Molar concentration of the solution will be calculated by using the below equation:
M₁V₁ = M₂V₂, where

M₁ = initial concentration of solution = 8.50 M

V₁ = initial volume = 0.5 L

M₂ = final concentration of diluted solution = ?

V₂ = final volume of diluted solution = 0.5 + 2.5 = 3 L

On putting values, we get

M₂ = (8.50)(0.5) / (3) = 1.416 = 1.42 M

Hence required molar concentration of dilute solution is 1.42M.

To know more about molarity, visit the below link:

https://brainly.com/question/24305514

#SPJ1

The reaction below that would result in a net increase in entropy is

I₂(g) ⇒ 2I(g) and the correct option is option 3.

Entropy is the measure of the disorder of a system. It is an extensive property of a thermodynamic system, which means its value changes depending on the amount of matter that is present.

Entropy increases when solid changes to a liquid and a liquid changes into gases.

Entropy also increases when the number of moles of gaseous products increases more than the reactants.

In this reaction, the reactant side has 1 mole of a gas while product has two moles and thus increase in entropy.

Thus, the ideal selection is option 3.

Learn more about Entropy, here:

https://brainly.com/question/13146879

#SPJ1

Hey there!

Mass = ?

volume = 105 mL

Density = 2.26 g/mL

Therefore:

D = m / V

2.26 = m / 105

m = 2.26 * 105

m = 237.3 g

Hope this helps!

Answer:

an increase in 1-butene was observed when t-butoxide was used

Explanation:

When a base reacts with an alkyl halide, an elimination product is formed. This reaction is an E2 reaction.

Here we are to compare the reaction of two different bases with one substrate; 2-bromobutane. Both reactions occur by the E2 mechanism but follow different transition states due to the size of the base.

The Saytzeff product, 2-butene, is obtained when the methoxide is used while the non Saytzeff product, 1-butene, is obtained when t-butoxide is used.

The Saytzeff rule is reliable in predicting the major products of simple elimination reactions of alkyl halides given the fact that a small/strong bases is used for the elimination reaction. Therefore hydroxide, methoxide and ethoxide bases give similar results for the same alkyl halide substrate. Bulky bases such as tert-butoxide tend to yield a higher percentage of the non Saytzeff product and this is usually attributed to steric hindrance.

Answer:

324.46 amu

3.33 × 10⁻³ mol

Explanation:

(a) Calculate the molecular mass of quinine, C₂₀H₂₄N₂O₂

We will add the mass of each atom times the number of each atom in a molecule.

20 × C + 24 × H + 2 × N + 2 × O

20 × 12.01 amu + 24 × 1.01 amu + 2 × 14.01 amu + 2 × 16.00 amu

324.46 amu

(b) Calculate the number of moles of quinine in 1.08 g of quinine

The molar mass of quinine is 324.46 g/mol.

1.08 g × (1 mol/324.46 g) = 3.33 × 10⁻³ mol

Answer

c. Raising the temperature of the reaction.

Explanation

An increase in temperature typically increases the rate of reaction. An increase in temperature will raise the average kinetic energy of the reactant molecules.

Answer:

2-1

Explanation:

=1

Answer:

72

Explanation:

The pattern here may be hard to find at first, but it's this: the number in the middle of the triangle = (number at lower left corner of triangle x number at upper vertex of triangle) + (number at upper vertex of triangle x number at lower right corner of triangle).

Thus, for the missing value...

Missing value = (3x8) + (8x6) = 24+48 = 72.

Could you tell me what concept in chemistry relates to this? I'm interested.

Also check out stylesben's answer. Seems like there's several ways of doing this.

Answer:

the answer is 72

Explanation:

6+3=9 and multiply 9 with 8 and answer comes 72

Answer:

115g

Explanation:

100*8=800

800+150+200=1150

1150/10=115

Answer:

I'll say A & C because the non-metals usually becomes a negative ion, by gaining extra electrons from the metal - so, the metal becomes a positive ion instead.

Answer:

One atom pulls an electron from another atom

Explanation:

they form when atoms lose or gain electrons in order to have a full outer shell of electrons to make them stable

Answer:

independent: type of liquid

dependent: growth of plant

control: time

constant: time

constant: time

hypothesis: If I water the plant with water, it will grow the most because water is the liquid that sustains life on earth.

Explanation:

Answer:

Explanation:

1,2,4,

The equations that show combustion are equations A, B and D.

When we talk about combustion, the idea is that the substance would be burnt in oxygen. In other words, the combustion can be taken to be an oxidation reaction. It is an oxidation reaction in the sense that the oxidation number of the substance that is reacting with the oxygen would become increased.

When we look at the equations that we have, it is quite easy to pick out among the balanced reaction equations that are shown here the ones that has to do with the burning of the substance in oxygen and a consequent rise in the oxidation number.

Learn more about combustion:https://brainly.com/question/15117038

#SPJ1

Answer:

253.85 L

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

C₃H₈ + 5O₂ —> 3CO₂ + 4H₂O

From the balanced equation above, 4 moles of water vapor were produced.

Finally, we shall determine the volume of the water vapor produced as follow:

Mole water vapor (n) = 4 moles

Pressure (P) = 1 atm

Temperature (T) = 500 °C = 500 °C + 273 = 773 K

Gas constant (R) = 0.821 atm.L/Kmol

Volume (V) =?

PV = nRT

1 × V = 4 ×0.0821 × 773

V = 253.85 L

Thus, the volume of water vapor obtained is 253.85 L

The volume in cubic meters is 4096m.

To calculate the volume or volume of an object or room in cubic feet measure the length, width, and height in feet and multiply length x width x height. The volume of an object is the amount of space it fills. Large capacity is measured in cubic meters m3. Smaller volumes are measured in cubic centimeters cm3 or cubic millimeters mm3.

Board foot is the most commonly used standard in lumber and lumber. One foot of board is equivalent to 144 cubic inches of lumber, or a board 1 inch thick, 12 inches wide, and 1 foot long. The second unit of measure is code. The volume of a box can be calculated as length x width x height. Taking a single-layer box as an example 102 x 102 x 102 is equivalent to 1,061,208 cubic millimeters. In metric units, volume is usually expressed in millimeters and liters.

Learn more about Cubic meters here:-https://brainly.com/question/10868015

#SPJ1

The amount of solute that will crystallize out of the supersaturated solution when it returns to being a saturated solution at 0°C is 46 g

A supersaturated solution is unstable and the excess solute will separate out of the solution if disturbed slightly or a tiny solute crystal is added to it.

It is a curve that shows the effect of temperature on solubility of of a substance.

From the solubility data provided, the amount of solute that will crystallize out of solution can be determined:

When the solution was cooled to form a supersaturated solution, the solution contains 106g of AgNO3

When the solution returns to being a saturated solution at 0°C:

Amount of solute that crystallizes out = 106g - 60 g

Amount of solute that crystallizes out = 46 g

Therefore, the amount of solute that will crystallize out of the supersaturated solution when it returns to being a saturated solution at 0°C is 46 g

Learn more about solubility, saturated solutions and supersaturated solutions at: https://brainly.com/question/9712781

https://brainly.com/question/24564260

Answer:

cooling, addition of moisture, or mixing with another air parcel.

The polarity, shape, and size of the molecules as well as their size all affect the intermolecular forces between them.

The London dispersion force and the London scattering force are two of the weakest forces, and it is known to emphasise the dipole-dipole interaction. Due to the substantial difference in electronegativity between hydrogen and sulphur, their bond is polar. As a result, dipole-dipole interactions are what happen between molecules.

Intermolecular force that polar molecules show known as "dipole-dipole forces" and in which one polar molecule's positive dipole end attracts another polar molecule's negative end. like HBr and H2S.

To know more about molecules visit:-

https://brainly.com/question/19556990

#SPJ9

The aldol condensation is an organic addition reaction for carbonyl compounds. propanal  undergo aldol addition with other propanal molecule producing the alpha-beta unsaturated aldehyde.

Aldol condensation is an organic reaction of carbonyl compounds taking place in presence of a base to produce beta-hydroxy carbonyl compound. Aldehydes and ketones undergo this type of reaction.

The mechanism of aldol reaction of propanal with 2,2 dimethyl propanal is given here. In the first step, the the base abstract the proton from the aldehyde.

The O- attack the carbonyl carbon of another aldehyde and form a bet-hydroxy aldehyde. This further undergo dehydration forming the alpha-beta unsaturated aldehyde.

Find more on aldol addition:

https://brainly.com/question/29847503

#SPJ1

The ΔG for the reaction at 298 K and the given partial pressures is -55.53 kJ/mol.

What is ΔG ?

The Gibbs free energy change for a reaction under non-standard conditions can be calculated using the following equation:

ΔG = ΔG° + RTln(Q)

where ΔG is the Gibbs free energy change, ΔG° is the standard Gibbs free energy change, R is the gas constant (8.314 J/(mol·K)), T is the temperature in kelvin, and Q is the reaction quotient.

The reaction quotient, Q, can be calculated using the partial pressures of the gases involved in the reaction:

Q = (P(NH3))² / (P(N2) x P(H2)³)

Plugging in the given values, we get:

Q = (0.75 atm)² / (0.35 atm x 0.30 atm³) = 0.2667

Now we can calculate the ΔG for the reaction:

ΔG = ΔG° + RTln(Q)

ΔG = (-32.8 kJ/mol) + (8.314 J/(mol·K) x 298 K x ln(0.2667))

ΔG = -32.8 kJ/mol + (-22.73 kJ/mol)

ΔG = -55.53 kJ/mol

Therefore, the ΔG for the reaction at 298 K and the given partial pressures is -55.53 kJ/mol.

What is reaction quotient?

Reaction quotient, commonly denoted as Q, is a measure of the relative concentrations of reactants and products in a chemical reaction at a particular moment in time. It is calculated by dividing the concentration of the products raised to their stoichiometric coefficients by the concentration of the reactants raised to their stoichiometric coefficients.

The equation for the reaction quotient Q is similar to the equilibrium constant Kc, but with the concentrations of the reactants and products at any time during the reaction, rather than at equilibrium. When the reaction is at equilibrium, the reaction quotient is equal to the equilibrium constant.

To know more about ΔG, visit:

https://brainly.com/question/13961239

#SPJ1

Two elements that could displace iron in a single replacement reaction are magnesium and zinc. This determination is made based on the reactivity series, which ranks metals according to their ability to displace other metals in aqueous solutions.

An element replaces another element in a compound in a single replacement reaction, creating a new compound and a different element.

The reactivity series determines the displacement of metals in single replacement reactions by ranking metals in order of their reactivity, with the most reactive metal displacing less reactive metals from their compounds.

Magnesium and zinc, which are more reactive than iron, can displace iron in a single replacement reaction.

To know more about metals;visit:

https://brainly.com/question/28650063

#SPJ1

Answer:

13.6 m

Explanation:

To find the wavelength, you need to use the following equation:

c = λ · f

In this equation,

-----> c = speed of light (3.0 x 10⁸ m/s)

-----> λ = wavelength (m)

-----> f = frequency (Hz)

You can plug the given values (speed of light and frequency) into the equation and then solve for "λ".

c = λ · f                                                        <----- Equation

(3.0 x 10⁸ m/s) = λ · (2.20 x 10⁷ Hz)           <----- Insert values

13.6 = λ                                                      <----- Divide both sides by 2.20 x 10⁷

Answer:

name four agricultural inputs are subsidized by the government

0.297 kJ of heat is needed to raise the temperature of 10g of aluminum from 22 degrees Celsius to 55 degrees Celsius.

The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius.

It is a measure of how much energy it takes to raise the temperature of a substance. It is the amount of heat necessary to raise one mass unit of that substance by one temperature unit.

It is given by the formula -

                                                  Q = mcΔT

where, Q = amount of heat

m = mass

c = specific heat

ΔT = Change in temperature

Given,

mass = 10g

c = 0.901J/g⁰C

Initial temperature (T₁) = 22⁰C

Final Temperature (T₂) = 55⁰C

Q = mcΔT

= 10 × 0.901 × (55 -22)

= 297.33 J = 0.297 kJ

Learn more about Specific heat, here:

https://brainly.com/question/31608647

#SPJ1  

Answer:

Ans choise B

Explanation:

Increasing rates of reaction by catalysts always results because of decrease in activation energy occurs.

Answer:

we use atom in our sentences all the time

Explanation:

that what i put

Answer:

the answer is copper pipe

Solution :

\(pk_b = -log ( K_b)\\\\pk_b = - log ( 3.6 \times 10^{-5})\\\\pk_b = 4.44\)

We know, pH of this solution :

\(pH = pK_a + log ( \dfrac{|conjugate\ base|}{|weak \ acid|}\\\\pH = 4.44 + log(\dfrac{0.480}{0.190})\\\\pH = 4.44 + 0.40\\\\pH =4.84\)

Hence, this is the required solution.

During silica gel chromatography, it is normal for: more polar compounds more polar compounds to elute more slowly than less polar compounds

Chromatography is a technique for separating mixture's constituent parts. Liquid chromatography includes several different subtypes, such as high-performance liquid chromatography (HPLC), size exclusion chromatography, and supercritical fluid chromatography. Ion-exchange, resin, and paper chromatography are some examples of alternative chromatographic techniques. According to their respective affinities for stationary and mobile phases, it is the process of separating the constituent components of a mixture. The samples are exposed to the mobile liquid flowing onto or through the stationary stable phase.

Learn more about chromatography here:

https://brainly.com/question/26491567

#SPJ4