A chemistry student is given 650. mL of a clear aqueous solution at 33.°C. He is told an unknown amount of a certain compound X is dissolved in the solution. The student allows the solution to cool to 17.9 0C. At that point, the student sees that a precipitate has formed. He pours off the remaining liquid solution, throws away the precipitates, and evaporates the water from the remaining liquid solution under vacuum. More precipitate forms. The student washes, dries and weighs the additional precipitate. It weighs 0.150 kg.
1. Using only the information above, can you calculate the solubility of X in water at 17 0C.
2. If you said yes, calculate it.

Answer:

this some next level stuff homie

Explanation:

imma just guess 7?

The thing being described is shaped like a ring with five parts. Inside the ring, there are two special types of bonds. This has a sulfur that is positively charged and has one unshared pair, also it has an NH group with one unshared pair.

Compound B is a substance that is made up of two or more different elements or molecules.

The thing being described has a ring with six members and three pi bonds. It has an oxygen atom with an extra proton and one extra electron. This substance is not aromatic.

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Answer:

* The empirical formula of a compound shows the ratio of elements present in a compound

* The molecular formula of a compound shows how many atoms of each element are present in a molecule of a compound.

Example: the compound butene has a molecular formula of C4H8. The empirical formula

of butene is CH2 because there is a 1:2 ratio of carbon atoms to hydrogen atoms.

Answer:

the de Broglie wavelength of one of the electrons is 5.3787 × 10⁻¹¹ m

Explanation:

Given the data in the question;

we know that; ( electron volt ) 1 eV = 1.602 × 10⁻¹⁹ J

so given that Kinetic Energy KE = 520 eV

KE = 520 × 1.602 × 10⁻¹⁹ = 8.3304 × 10⁻¹⁷ J

we know that;

Kinetic Energy = 1/2 × mv²

where m is the electron mass

and mass of electron is  9.109 × 10⁻³¹ kilograms

so

8.3304 × 10⁻¹⁷ = 1/2 × 9.109 × 10⁻¹⁷× v²

v = √[(8.3304 × 10⁻¹⁷) / (1/2 × 9.109 × 10⁻³¹)]

v = 1.3524 × 10⁷ m/s

speed of the electron v = 1.3524 × 10⁷ m/s

now, de Broglie equation;

wavelength λ = h / mv

where h is Planck constant ( 6.626 × 10⁻³⁴ m² kg / s )

so we substitute

wavelength λ = 6.626 × 10⁻³⁴ / ( 9.109 × 10⁻³¹ × 1.3524 × 10⁷)

wavelength λ = 5.3787 × 10⁻¹¹ m

Therefore, the de Broglie wavelength of one of the electrons is 5.3787 × 10⁻¹¹ m

Answer: The formula for the precipitate formed is [tex]ZnCO_3[/tex]

Explanation:

A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.  

A double displacement reaction in which one of the product is formed as a solid is called as precipitation reaction.

The balanced chemical equation when aqueous solutions of zinc chloride and sodium carbonate are mixed:

[tex]ZnCl_2(aq)+Na_2CO_3(aq)\rightarrow ZnCO_3(s)+2NaCl(aq)[/tex]

Answer:

0.012 M

Explanation:

Step 1: Given and required data

Step 2: Calculate the moles (n) of solute (KCl)

We will use the following expression.

n = m/M = 0.64 g / (74.553 g/mol) = 8.6 × 10⁻³ mol

Step 3: Calculate the molar concentration (C) of the solution

The molarity is equal to the moles of solute divided by the liters of solution.

C = 8.6 × 10⁻³ mol/0.725 L = 0.012 M

Answer:

See explanation

Explanation:

Water is a polar solvent and is also called a universal solvent because of its ability to dissolve several substances especially in the body.

The functions of water learned in the life sciences class include;

1. Water is the medium for biochemical reactions

2. Most substances in the body are transported from place to place by water.

3. Water acts a solvent for many biologically important substances in the body.

4. Water is necessary in helping animals to regulate their body temperature.

Answer:

Here is the answer ⬆️⬆️⬆️⬆️⬆️⬆️⬆️

The order of the given elements in increasing atomic number is given as F (9), Al (13), Ga (31), Sr (38), Zr (40), I(53) and Terbium (65).

The atomic number of an element in periodic table is the number of electrons in its neutral atom. Elements are arranged in periodic table in an increasing order of atomic number from left to right.

An atom is composed of electrons, protons and neutrons. Protons are positively charged and electrons are negatively charged particles and they are equal in an atom. Thus, the total negative charge is neutralised by the negative charges.

The order for the given elements in periodic table in an increasing atomic number is F (9), Al (13), Ga (31), Sr (38), Zr (40), I(53) and Terbium (65).

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Answer:4.2 6.4 6.7 9.5 5.5 3.8

Explanation:

Answer:

Fe + H(C2H3O2) ........

Answer:

That is the Atomic mass

Explanation:

The element symbol is S, Element name is sulfur, and

Atomic number is 16

Answer:

The answer is barium phosphate

The full question is shown in the image attached to this answer

Answer:

6.2 * 10^-3

Explanation:

The reaction at equilibrium is as follows;

TiCl4(l) → Ti(s)+ 2Cl2(g)

We have to obtain the concentration of chlorine gas as follows;

[Cl2] = 1.08/70.91 g/mol × 5.2 L

[Cl2] = 0.079 M

Kc = [Cl2]^2

Kc = [ 0.079]^2

Kc = 6.2 * 10^-3

Answer:

Ammonia

Explanation:

Both amines and amides are structurally similar to ammonia, the difference is the introduction of a carbon into the structure.

Galileo Galilei

hope it helps you

Answer:

Galileo Galilei is the father of Physics

I hope it helps ❤❤

Answer:

I hope it help

your welcome

Answer:

It’s is a simple

Explanation:the prokaryotic cell involves a simple process which intern involves one chromosom

Answer:

3 atoms

Explanation:

there is one calcium and two chlorine

Answer:

A Brønsted-Lowry acid.

A Brønsted-Lowry base.

Ammonia is an acceptor of proton.

Explanation:

A Brønsted-Lowry acid is any atom that can donate a proton (H +) to another atom or molecule whereas Brønsted-Lowry base is any species that can accept a proton from another atom or molecule or in other words, a Brønsted-Lowry acid is a proton donor, while on the other hand, a Brønsted-Lowry base is a proton acceptor. The ammonia molecule accepts the hydrogen ion is considered as the Brønsted-Lowry base.

Answer:

[tex]n=1.732mol[/tex]

[tex]\% N=18.7\%[/tex]

Explanation:

Hello!

In this case, since the molecular formula of glycine is C₂H₅NO₂, we realize that the molar mass is 75.07 g/mol; thus, the moles in 130.0 g of glycine are:

[tex]n=130.0g*\frac{1mol}{75.07 g}\\\\ n=1.732mol[/tex]

Furthermore, we can notice 75.07 grams of glycine contains 14.01 grams of nitrogen; thus, the percent nitrogen turns out:

[tex]\% N=\frac{14.01}{75.07}*100\% \\\\\% N=18.7\%[/tex]

Best regards!

Answer:

0.25 of the original

Explanation:

(0.5)^(90/45)

The fraction of iron-59 after 90 days is 0.25.

Iron-59 decays following first-order kinetics. Given the half-life ([tex]t_{1/2}[/tex]) of 45 days, we can calculate the rate constant (k) using the following expression.

[tex]k = \frac{ln2}{t_{1/2}} =\frac{ln2}{45day} = 0.015 d^{-1}[/tex]

For first-order kinetics, we can find the fraction of Fe ([Fe]/[Fe]₀) after and an elapsed time (t) of 90 days, using the following equation.

[tex]\frac{[Fe]}{[Fe]_0} =e^{-k \times t } = e^{-0.015 d^{-1} \times 90 d } \approx 0,25[/tex]

The fraction of iron-59 after 90 days is 0.25.

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Answer:

0.263 mol

Explanation:

K2SO4 - potassium sulfate

Molar mass (K2SO4) = 2*39.0983 + 32.065 + 4*15.9994 =

= 174.2592≈174.26 g/mol

45.8 g * 1 mol/174.26 g = 0.263 mol

Answer:

liquid

Explanation:

it's not plasma, solid, or gas

so I think liquid

Balanced Equation: 2 KCIO3 ⇒ 2 KCl + 3 O2

3 mol KClO3 x [tex]\frac{3 mol O2}{2 mol KClO3}[/tex] = 4.5 mol O2

Answer:

Convergent

Explanation:

I don't know whether this is one of your answers but It is convergent because convergent boundaries are when two plates collide against each other which can create mountains and volcanos.

Answer:

warm

Explanation:

Answer:

1.76 moles of HCl.

Explanation:

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

2KMnO₄ + 8HCl —> 3Cl₂ + 2MnO₂ + 4H₂O + 2KCl

From the balanced equation above,

2 moles of KMnO₄ reacted with 8 moles of HCl.

Finally, we shall determine the number of mole of HCl needed to react with 0.44 moles of KMnO₄. This can be obtained as follow:

From the balanced equation above,

2 moles of KMnO₄ reacted with 8 moles of HCl.

Therefore, 0.44 moles of KMnO₄ will react with = (0.44 × 8)/2 = 1.76 moles of HCl.

Thus, 1.76 moles of HCl is needed for the reaction.

Answer:

snow is made up of a variety of mostly organic matter, including dead or dying animals and phytoplankton, protists, fecal matter, sand, and other inorganic dust.

Explanation:

I hope I helped!!

Plz mark me brainliest it would really make my day!

Answer:

I think its organic unless we are talking about this snow storm then no

Answer:

The common sources of outdoor air pollution are emissions caused by combustion processes from motor vehicles, solid fuel burning and industry. Other pollution sources include smoke from bushfires, windblown dust, and biogenic emissions from vegetation (pollen and mold spores).

smog is produced when sunlight reacts with nitrogen oxides in the atmosphere. Nitrogen oxides come from car exhaust, coal power plants, and factory emissions. When sunlight hits these chemicals, they form airborne particles and ground-level ozone—or smog.

28 mol CaF

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

[Given] 1.7 × 10²⁵ molecules CaF

[Solve] moles CaF

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.

28.2298 mol CaF ≈ 28 mol CaF