How much NaAlO2 (sodium aluminate) is required to produce 2.59 kg of Na3AlF6?

Answer:

so 0.71 g/L

Explanation:

C =n/v n= to 0.355

v= 0.500L

The concentration of Na⁺ ions in the dilutes solution of 0.500 L is 0.131 molar.

Molarity is a concertation term for solutions. Mathematically it is the ratio of no. of moles of solute to the volume of solution in liter.

Molarity = (no.of moles / volume of solution in L)

Given that the volume of NaCl is 0.185 L and have a concentration of 0.355 M. The solution is diluted to 0.500 L , then the new concentration is calculated as follows:

M1 V1 = M2V2

(0.185 L × 0.355 M) = (0.500 L × M2), where M2 have to be calculated.

M2 = (0.185 × 0.355)/0.500 = 0.131 M

The concentration of Na⁺ will be one times the concentration of NaCl. Since the no.of moles of sodium ions and chloride ions are equal there.

Therefore, the concentration of sodium ions is 0.131 M.

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Answer: Gas–liquid–solid triple point

The single combination of pressure and temperature at which liquid water, solid ice, and water vapor can coexist in a stable equilibrium occurs at approximately 273.1575 K (0.0075 °C; 32.0135 °F) and a partial vapor pressure of 611.657 pascals (6.11657 mbar; 0.00603659 atm).

Explanation:

It represents the equilibrium between the liquid and gas phases. The point on this curve where the vapor pressure is 1 atm is the normal boiling point of the substance. The vapor-pressure curve ends at the critical point (B), which is at the critical temperature and critical pressure of the substance.

The following applies to the above equation:

Brønsted-Lowry acid is the any chemical species that acts as a donor of protons while Brønsted-Lowry base is any chemical species that acts as a proton acceptor.

In the following equation: HCOOH(aq) + PO43-(aq) = HCOO-(aq) + HPO42-(aq)

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Answer:

10.53m/s

Explanation:

Initial velocity: 13m/s

Angle of projection: 55deg

Y-component of velocity is given as usin⌀

Plugging in, we get

= 13 * sin(55deg)

= 13 * 0.81

= 10.53

⇒ 10.53m/s

Ph 2 will ahve more strength due to the fact that its more acidic compared to pH 5.

the lower the number of a pH, the more it is heading towards being acidic, but the higher the number, the more it heads towards being an alkali. here is a ppt i made along time ago. hope it can help you . have a nice day

Answer:

joib

Explanation:

The wave number of the compound can be calculated as shown and we are going to have 8.651 x 10^13 s^-1.

The force constant of a molecule is a measure of the strength of the chemical bonds between the atoms in the molecule. It is defined as the second derivative of the potential energy of the molecule with respect to atomic displacements, evaluated at the equilibrium geometry of the molecule.

μH35Cl = 1.627 x 10^-27 kg

v = 1/2π x (480.5kg m s^-2 / 1.627 x 10^-27 kg)^1/2

v = 0.1592 x (2.953 x 10^29 m s^-2)^1/2

v = 0.1592 x (5.434 x 10^14 s^-1)

v = 8.651 x 10^13 s^-1

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Answer:

C4H9

Explanation:

If H = 15.88%

Then C = 100.00 – 15.88 = 84.12

Divide each % value by respective atomic mass

H = 15.88/1 = 15.88

C = 84.12/12 = 7.01

Divide through by smaller value

H = 15.88/7.01 = 2.26

C = 7.01/7.01 = 1

Remove fraction , multiply by 4

H = 9

C = 4

Empirical formula = C4H9

The hydrocarbon could be ( C4H9)2 = C8H18 = octane.

The concentration of the resulting solution, given that 50.0 grams of MgSO₄.7H₂O were added to 1.60 liters of water is 0.127 M

First, we shall obtain the mole of 50 grams of MgSO₄.7H₂O. This is given below:

Mole = mass / molar mass

Mole of MgSO₄.7H₂O = 50 / 246

Mole of MgSO₄.7H₂O = 0.203 mole

Finally, we shall determine the concentration of the solution. Details below:

Concentration = mole / volume

Concentration of solution = 0.203 / 1.60

Concentration of solution = 0.127 M

Thus, the concentration of the solution is 0.127 M

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Answer: 2 atoms

Explanation: Nitrogen gas has the chemical formula N2 which can be denoted by N=N. It is categorized as one of the diatomic elements which are made up of two atoms of the same element joined by one or more covalent bonds because in the case of N2 also a triple covalent link connects the two nitrogen atoms.

Answer:

a) ammonium ion

b) amide ion

Explanation:

The order of decreasing bond angles of the three nitrogen species; ammonium ion, ammonia and amide ion is NH4+ >NH3> NH2-. Next we need to rationalize this order of decreasing bond angles from the valence shell electron pair repulsion (VSEPR) theory perspective.

First we must realize that all three nitrogen species contain a central sp3 hybridized carbon atom. This means that a tetrahedral geometry is ideally expected. Recall that the presence of lone pairs distorts molecular structures from the expected geometry based on VSEPR theory.

The amide ion contains two lone pairs of electrons. Remember that the presence of lone pairs causes greater repulsion than bond pairs on the outermost shell of the central atom. Hence, the amide ion has the least H-N-H bond angle of about 105°.

The ammonia molecule contains one lone pair, the repulsion caused by one lone pair is definitely bless than that caused by two lone pairs of electrons hence the bond angle of the H-N-H bond in ammonia is 107°.

The ammonium ion contains four bond pairs and no lone pair of electrons on the outermost nitrogen atom. Hence we expect a perfect tetrahedron with bond angle of 109°.

The temperatures describing the value of C is 100 °C, because it is the boiling point of water.Hence, The correct answer is Option (B)

A phase change is when matter changes to from one state (solid, liquid, gas, plasma) to another.

These changes occur when sufficient energy is supplied to the b(or a sufficient amount is lost), and also occur when the pressure on the system is changed.

The given heating curve has two flat lines (Or plateaus) ;

(Image is attached for reference)

In the given problem, C is the second flat line, so it is boiling point.

Therefore , The temperatures describing the value of C is 100 °C, because it is the boiling point of water.Hence, The correct bis Option (B)

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Answer:

True.

Explanation: " Most now say that purring begins in the brain. A rhythmic, repetitive neural oscillator sends messages to the laryngeal muscles, causing them to twitch at the rate of 25 to 150 vibrations per second (Hz). "

Answer:

The correct solution is "3.28 m".

Explanation:

According to the question,

Mol fraction of solvent,

= 0.0558

Molar mass of water,

= 18 g/mol

Mol of H₂O in 1000 g water,

= 55.55 mol

Now,

Let the mol of solute will be "x mol".

Total mol in solution will be "55.55 + x".

As we know,

⇒ The mol fraction of solvent = \(\frac{x}{55.55+x}\)

                                        \(0.0558=\frac{x}{55.55+x}\)

                                                \(x=0.0558[55.55+x]\)

                                                \(x=3.09969+0.0558x\)

                               \(x-0.0558x=3.09969\)

                                               \(x=\frac{3.09969}{0.9442}\)

                                                  \(=3.38 \ m\)

Here some signs of chemical change :

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Molecular mass of  9.3 x 10^ 24 molecules of glucose  = 1675.6 x 10^ 24

It is given that the mass of glucose is 180.18 g/mol
so if we have to calculate the mass of 9.3x 10^ 24 molecules of glucose
we will apply a simple unitary method i.e,

9.3 x 10^ 24 *  180.18 g/mol = 1675.67 x 10^ 24
To calculate the molecular mass of a molecule, multiply the subscript (number of atoms) by the atomic mass of each element in the molecule and add those masses together.
Remember that - To determine the compound's molecular mass in grams per mole, use the molecular formula.
Divide the supplied mass by the molar mass of the chemical to convert it to moles.
By dividing the number of moles by Avogadro's number, you may convert from moles to molecules.

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Answer:

\(T_f=25.0\°C\)

Explanation:

Hello.

In this case, considering that the sample of hot copper is submerged into the water and the container is isolated, the heat lost by the copper is gained by the water so we can write:

\(Q_{Cu}=-Q_w\)

In terms of mass, specific heat and temperature we write:

\(m_{Cu}C_{Cu}(T_f-T_{Cu})=-m_wC_w(T_f-T_w)\)

Whereas the final temperature is the same for both copper and water because they are in contact until thermal equilibrium is reached. In such a way, the required maximum temperature no more than the equilibrium temperature and is computed as shown below:

\(T_f=\frac{m_{Cu}C_{Cu}T_{Cu}+m_wC_wT_w}{m_{Cu}C_{Cu}+m_wC_w}\)

Thus, plugging the given data in the formula, we obtain:

\(T_f=\frac{10.3g*0.385\frac{J}{g\°C}*100\°C +47.0g*4.184\frac{J}{g\°C}*23.5\°C }{10.3g*0.385\frac{J}{g\°C}+47.0g*4.184\frac{J}{g\°C}}\\\\T_f=25.0\°C\)

Which is a small change considering the initial one, because the mass of water is greater than the mass of copper as well as for the specific heats.

Best regards!

The maximum temperature of the water in the insulated container after the copper metal is added is 25 °C

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

Mass of water (Mᵥᵥ) = 47 g

Temperature of water (Tᵥᵥ) = 23.5°C

Specific heat capacity of water (Cᵥᵥ) = 4.184 J/gºC

Mass of copper (M꜀) = 10.3 g

Temperature of copper (M꜀) = 100 °C

Specific heat capacity of copper (C꜀) = 0.385 J/gºC

The equilibrium temperature of the mixture can be obtained as follow:

Heat loss by copper = Heat gained by water

Q꜀ = Qᵥᵥ

M꜀C꜀(M꜀ – Tₑ) = MᵥᵥCᵥᵥ(Tₑ– Mᵥᵥ)

10.3 × 0.385 (100 – Tₑ) = 47 × 4.184 (Tₑ – 23.5)

3.9655 (100 – Tₑ) = 196.648 (Tₑ – 23.5)

Clear bracket

396.55 – 3.9655Tₑ = 196.648Tₑ – 4621.228

Collect like terms

396.55 + 4621.228 = 196.648Tₑ + 3.9655Tₑ

5017.778 = 200.6135Tₑ

Divide both side by 200.6135

Tₑ = 5017.778 / 200.613

Thus, the equilibrium temperature of the mixture is 25 °C. Therefore, the maximum temperature of the water in the insulated container is 25 °C

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Positive acceleration - Increase in speed

A student speeds up to make it to class on time

Moves to a positive direction

Negative acceleration -  Decrease in speed

A student turns around to go back and get their computer

Moves to a negative direction

Zero acceleration -No change in speed or direction

A student waits at the door

No movement

Acceleration is a physical quantity that measures the rate of change of an object's velocity with respect to time. In other words, it is the rate at which an object's speed or direction of motion changes.

The formula for acceleration is:

acceleration = (final velocity - initial velocity) / time

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Answer:

I think the answer is 12.0107 u and 6 (6 as the atomic number) and (12.0107 u as the atomic mass).

Explanation:

I Hope this helps.

The mass of HF produced from the given amounts of BF₃ and H₂ is 99.5 grams.

To solve this problem, we need to use stoichiometry to determine the amount of HF produced from the given amounts of BF₃ and H₂.

From the balanced equation;

2 BF₃ + 3 H₂ → 2 B + 6 HF

We can see that 2 moles of BF₃ react with 3 moles of H₂ to produce 6 moles of HF. This means that the ratio of BF₃ to HF is 2:6, or 1:3.

First, we need to calculate the number of moles of BF₃ and H₂ from their given masses and molar masses;

n(BF₃) = m(BF₃) / M(BF₃) = 40 g / 67.81 g/mol = 0.59 mol

n(H₂) = m(H₂) / M(H₂) = 5 g / 2.02 g/mol = 2.48 mol

Next, we can determine which reactant is limiting by comparing their mole ratios. The ratio of BF₃ to H₂ is 1:1.67, which means there is not enough H₂ to react with all of the BF₃. This makes H₂ the limiting reactant.

To find the number of moles of HF produced, we use the mole ratio from the balanced equation;

n(HF) = n(H₂) × (6 mol HF / 3 mol H₂) = 2.48 mol × 2

= 4.96 mol

Finally, we calculate the mass of HF produced from its number of moles and molar mass;

m(HF) = n(HF) × M(HF) = 4.96 mol × 20.01 g/mol

= 99.5 g

Therefore, the mass of HF is 99.5 grams.

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Lithium and sodium are in the same group because they both have the same number of valence electrons, the group is known as the alkali metals group. Inorganic sodium salts include sodium chloride, which is an inorganic chloride.

Beryllium, Magnesium, Calcium, Barium, Strontium, and Radium are among the Group 2 alkaline earth metals, which are soft silver metals with a less metallic appearance than the Group 1 alkali metals.

Our body utilizes sodium chloride (NaCl), sometimes referred to as salt, to transport and absorb nutrients. uphold blood pressure. keep the fluid in the proper equilibrium. send nerve signals

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Answer: 20.7g of O2 would be produced from the decomposition of KClO3 if 32.2g of KCl were obtained

Explanation:

The question requires us to determine the amount, in grams, of O2 that would be produced in the decomposition reaction of KClO3 when 32.2g of KCl are produced.

The following balanced chemical equation was provided:

According to the balanced chemical equation above, 3 moles of O2 are obtained when 2 moles of KCl are produced. Thus, we can use this stoichiometric relation to determine the amount of O2 produced.

The problem presented is a mass to mass stoichiometry problem, therefore we'll need to follow the steps:

mass of KCl → moles of KCl → moles of O2 → mass of O2

These steps mean that we'll first calculate the number of moles of KCl that correspond to the mass of KCl given (32.2g), then use the stoichiometry of the reaction and mole ratio between O2 and KCl to determine the number of moles of O2 produced, and at last use the molar mass of O2 to convert this number of moles to the mass of O2 (the molar mass of KCl is 74.55g/mol, and the molar mass of O2 is 32.00g/mol).

Therefore, we can write the following expression to calculate the mass of O2:

And, applying the appropriate values, we'll have:

Therefore, 20.7g of O2 would be produced from the decomposition of KClO3 if 32.2g of KCl were obtained.

The statement that is best supported by the data shown is this: C) Topaz is harder than a steel file.

The best supporting statement is the one that shows that Topaz has a higher hardness rating when compared to a steel file.

In the depiction, Topaz is shown as having a hardness rating of 8 while the steel file has an approximate hardness of 6.5. So, the right conclusion to reach is that Topaz is harder than a steel file.

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Answer:

malleable

Explanation:

physical properties of matter include colour, hardness, malleability, solubility, density etc

Answer:

35.453 good luck with your work