Which of the following is an example of the Law of Conservation of Mass?

The answer is 155 pm, hope this helps!

While naming a compound, the less electronegative element is written first in the formula.

Generally, the less electronegative element is written first while writing the formula, though there are a few exceptions. Basically, carbon is always written first in a formula and hydrogen is after nitrogen in a formula such as NH₃. The common order of common non-metals in binary compound formulas is C, P, N, H, S, I, Br, Cl, O, F.

Generally, electronegativity is defined as a chemical property which describes the tendency of an atom or a functional group to attract electrons toward itself. The electronegativity of an atom is basically affected by both its atomic number and the distance that its valence electrons reside from the charged nuclei. And the more electronegative element is written in the first name of the compound.

Learn more about electronegativity from the link given below.

https://brainly.com/question/17762711

#SPJ4

Answer:

0.125

Explanation:

i took a test and got it right choosing this answer hopes this help

Answer:

2 groups

Explanation:

The molecule 3, 3-diethylpentane has 2 ethyl groups because the prefix di- means that there are 2 homogeneous substituent groups present in the molecule.

Answer:

9.0g

Whabshsbzhz sbsj dhbxjsbxjz sbsbbsbsjs

Explanation:

cause I believe

Answer:

B

Explanation:

The number of mmol of Br2 in 0.48 mL of bromine solution is 195 mmol. In 100 mg of trans-cinnamic acid, 0.674 mmol is calculated. The limiting reagent will be trans-cinnamic acid. The theoretical yield of the addition product is 211.9 mg.

To calculate the number of mmol of Br2 present in 0.48 mL of bromine solution, we need to first calculate the mass of Br2 in 0.48 mL of solution:

Volume of Br2 = 10% of 100 mL = 10 mL

Mass of Br2 = Volume x Density = 10 mL x 3.12 g/mL = 31.2 g

Now, we need to convert the mass of Br2 to mmol:

MM of Br2 = 159.8 g/mol

Moles of Br2 = Mass / MM = 31.2 g / 159.8 g/mol = 0.195 mol

Mmol of Br2 = Moles x 1000 = 195 mmol

Therefore, 0.48 mL of bromine solution contains 195 mmol of Br2.

To calculate the number of mmol in 100 mg of trans-cinnamic acid, we need to first calculate the molecular weight of trans-cinnamic acid:

MW of trans-cinnamic acid = 148.16 g/mol

Moles of trans-cinnamic acid = Mass / MW = 0.1 g / 148.16 g/mol = 0.000674 mol

Mmol of trans-cinnamic acid = Moles x 1000 = 0.674 mmol

Therefore, 100 mg of trans-cinnamic acid contains 0.674 mmol.

Since the stoichiometry of the reaction is 1:1, the limiting reagent will be the reactant with the lowest number of mmol. In this case, the limiting reagent will be trans-cinnamic acid since it only has 0.674 mmol, which is less than the 195 mmol of Br2.

To calculate the theoretical yield of the addition product, we need to use the number of mmol of the limiting reagent (0.674 mmol) and the molecular weight of the product:

MW of the addition product = 314.2 g/mol

Theoretical yield = Moles of limiting reagent x MW of product = 0.674 mmol x 314.2 g/mol = 211.9 mg

Therefore, the theoretical yield of the addition product is 211.9 mg.

Know more about trans-cinnamic acid here:

https://brainly.com/question/31656319

#SPJ11

Answer:

I would say ether the first one or the third one because on those questions you always want to choose the one that gives the most information or sound more believe

Hope this helped

The cells prefer purine and pyrimidine salvage pathways over the de novo synthesis pathway because of their short act of enzymatic reactions.

The salvage pathway is a set of acts or consequences of enzymatic or catalytic reactions to form the rapid products.

In the salvage pathway the enzymes which are used help purine and pyrimidine base pairs to transfer the electrons for metabolism.

Therefore, because of its short act of enzymatic reactions cells prefer purine and pyrimidine salvage pathways over the de novo synthesis pathway.

Learn more about  salvage pathways, here;

https://brainly.com/question/28222638

#SPJ4

Answer:

B. \( 5 \times {10}^{ - 5}\: m \)

Explanation:

\(0.00005 \: m= 5 \times {10}^{ - 5} \: m \\ \)

Answer:

c. a small amount

Explanation:

Trace elements (or trace metals) are minerals present in living tissues in small amounts.

Answer:

They are positively charged ions.

Explanation:

Though, I am not exactly sure about what do you actually mean by your question, but cations are positively charged ions.

Answer:

Yes, a chemical reaction has occurred

Explanation:

A chemical change is known to lead to the appearance of a new substance. Another name for chemical change is chemical reaction.

The new substance is formed when the bonds in the reactants are being rearranged to yield the products of the reaction.

In this case, two clear liquids were mixed and the contents of the system interacted briefly to yield a new product which appears as the white powder suspended in a clear,  colorless liquid.

Answer:the positive ionic radius is smaller than the neutral atomic radius

Explanation:

Answer:The positive ionic radius is smaller than the neutral atomic radius.

Explanation: just took the test

Answer:

acetone evaporates faster than hexane.

Explanation:

because acetone does nor participate in hydrogen bonding, so it's intermolecular forces are comparatively weaker, and it evaporates most quickly.

The molarity (M) of a solution, you need to divide the moles of solute (in this case, KF) by the volume of the solution (in liters). The molarity of the solution is 6.07 M.

Molarity is defined as the number of moles of solute per liter of solution. In this problem, we are given the number of moles of solute (4.55 moles of KF) and the volume of solution (0.75 L). To find the molarity, we simply divide the number of moles by the volume in liters: Molarity = moles of solute / volume of solution. Molarity = 4.55 mol / 0.75 L, Molarity = 6.07 M.

Identify the moles of solute (KF): 4.55 moles
Identify the volume of the solution: 0.75 L
Divide the moles of solute by the volume of the solution: 4.55 moles / 0.75 L = 6.07 M.

To know more about solution visit:

https://brainly.com/question/15757469

#SPJ11

a) To synthesize 2-bromobutane from butanoic acid, react it first with thionyl chloride (SOCl2) and then with bromine (Br2) from the table.

b) To synthesize 2-methyl butanoic acid from butanoic acid, use a three-step process involving the reaction of butanoic acid with PCC to form butanal, then with methylmagnesium bromide (CH3MgBr) to form 2-methylbutan-1-ol, and finally with PCC again to form 2-methyl butanoic acid.

While the synthesis of 2-methyl butanoic acid requires a three-step process of oxidation, Grignard reaction, and oxidation, the synthesis of 2-bromobutane from butanoic acid only requires the conversion of the carboxylic acid to an acid chloride followed by a reaction with bromine.

Learn more about  Grignard reaction

brainly.com/question/30546045

#SPJ4

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

\(n = \frac{N}{L} \\\)

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

\(n = \frac{3.0 \times {10}^{22} }{6.02 \times {10}^{23} } \\ = 0.049833...\)

We have the final answer as

Hope this helps you

To determine the equation of the parabola that passes through the given points, we can use the standard form of a quadratic equation, which is y = ax² + bx + c.

Substituting the coordinates of the three points into this equation will give us a system of three equations in three variables, which can be solved to find the values of a, b, and c that make up the equation of the parabola. The process is as follows:Substituting (-12, 1333) into the equation, we get: 1333 = a(-12)² + b(-12) + cSimplifying, we get: 1333 = 144a - 12b + c(1)Substituting (4,77) into the equation, we get: 77 = a(4)² + b(4) + cSimplifying, we get: 77 = 16a + 4b + c(2)Substituting (8,403) into the equation, we get: 403 = a(8)² + b(8) + cSimplifying, we get: 403 = 64a + 8b + c(3)Solving equations (1), (2), and (3) simultaneously, we get: a = -3, b = 45, and c = 1427Substituting these values back into the standard form equation, we get: y = -3x² + 45x + 1427Therefore, the equation of the parabola that passes through the points (-12, 1333), (4,77), and (8,403) is y = -3x² + 45x + 1427.

To know more about parabola visit :

https://brainly.com/question/11911877

#SPJ11

Answer:

39.9 L

Explanation:

Use PV = nRT to solve this problem.

Substitute the values known.

P is pressure, which is 202 kPa, V is volume, which we do not know, n is moles, which is 3, R is 8.314, and T is temperature, which is 323K.

Set up your equation as follows \(202 kPa V = 3.00mol (\frac{8.314 kPa L }{mol K} ) 323K\)

Solve for V, multiply the right side of the equation and divide by the pressure, 202 kPa.

This results in Volume being 39.9 L

With 48.96 g of iron, the maximum mass of aluminum oxide that may be created is 22.3 g.

To determine the maximum mass of aluminum oxide that could be produced along with 48.96 g of iron, we need to first determine which reactant is limiting. The balanced chemical equation for the reaction between aluminum and iron (III) oxide is:

2Al(s) + Fe₂O₃(s) → 2Fe(s) + Al₂O₃(s)

From the equation, we can see that 2 moles of aluminum react with 1 mole of iron (III) oxide to produce 2 moles of iron and 1 mole of aluminum oxide.

We can use the molar mass of iron (III) oxide and the mass of iron provided to determine the number of moles of iron (III) oxide that reacted:

Molar mass of Fe₂O₃ = 55.85 g/mol + 2(16.00 g/mol)

                                    = 159.69 g/mol

Number of moles of Fe = 48.96 g / 55.85 g/mol

                                       = 0.876 mol

Number of moles of Fe₂O₃ = 0.876 mol / 2

                                              = 0.438 mol

Therefore, 0.438 moles of iron (III) oxide reacted, which is the limiting reactant since there is less iron (III) oxide than required to react with all of the aluminum present.

Using the stoichiometry of the balanced equation, we can determine the maximum mass of aluminum oxide that can be produced:

1 mole of Al₂O₃ = 101.96 g

2 moles of Al react with 1 mole of Al₂O₃

Number of moles of Al₂O₃  = 0.438 mol / 2 = 0.219 mol

Mass of Al₂O₃ = 0.219 mol x 101.96 g/mol = 22.3 g

Therefore, the maximum mass of aluminum oxide that could be produced along with 48.96 g of iron is 22.3 g.

To know more about the Aluminum oxide, here

https://brainly.com/question/28544817

#SPJ1

Answer:

White is the color of a hydrogen molecule

Answer:

green. It is white when separate, but it turns green when it's formed into water.

Explanation:

Answer: The balanced equation is 4,3,2,  

Answer: Balanced equation = 4Fe + 3O2 => 2Fe2O3.

Explanation:

The formula for the limiting reagent is Fe, and the maximum amount of iron(II) oxide that can be produced is 0.135 moles.

To determine the limiting reagent and the maximum amount of iron(II) oxide that can be produced, we need to compare the moles of each reactant and their stoichiometric ratios in the balanced equation.

The balanced equation for the reaction is:

4Fe(s) + 3O₂(g) → 2Fe₂O₃(s)

From the balanced equation, we can see that the stoichiometric ratio between iron and oxygen is 4:3. This means that 4 moles of iron react with 3 moles of oxygen to produce 2 moles of iron(II) oxide.

Moles of iron(II) oxide = min (0.270 moles of Fe, (0.579 moles of O₂) × (2 moles of Fe₂O₃ / 3 moles of O₂))

To determine the limiting reagent, we compare the moles of iron and oxygen and choose the reactant that produces the lesser moles of iron(II) oxide. In this case, we have:

Moles of iron(II) oxide produced from 0.270 moles of Fe = 0.270 moles × (2 moles of Fe₂O₃ / 4 moles of Fe) = 0.135 moles

Moles of iron(II) oxide produced from 0.579 moles of O₂ = 0.579 moles × (2 moles of Fe₂O₃ / 3 moles of O₂) = 0.386 moles

Since 0.135 moles of iron(II) oxide is less than 0.386 moles, the limiting reagent is iron.

Therefore, the formula for the limiting reagent is Fe, and the maximum amount of iron(II) oxide that can be produced is 0.135 moles.

Learn more about limiting reagents here:

https://brainly.com/question/31171741

#SPJ11

To determine the selenide ion (Se2-) concentration for a 0.200 M H2S solution that has the stepwise dissociation constant, we need to use the equilibrium constants for the reaction of H2S with water and for the reaction of HSe- with water.

The stepwise dissociation of H2S in water can be represented as:

H2S + H2O ⇌ HS- + H3O+

K1 = [HS-][H3O+] / [H2S]

The stepwise dissociation of HSe- in water can be represented as:

HSe- + H2O ⇌ Se2- + H3O+

K2 = [Se2-][H3O+] / [HSe-]

We are given that the concentration of H2S is 0.200 M. At equilibrium, some of the H2S reacts with water to form HS- and H3O+. We can assume that the initial concentration of H2S is much greater than the concentrations of HS- and H3O+ formed, so we can approximate the concentration of H2S to be 0.200 M at equilibrium. We don't know the concentration of H3O+ at this point, so we will express it in terms of x.

H2S + H2O ⇌ HS- + H3O+

Initial concentration: 0.200M 0 0 0

Change: -x +x +x

Equilibrium concentration: 0.200-x x x -

Now we can use the equilibrium concentrations to calculate the values of K1 and K2 using the given stepwise dissociation constants:

K1 = 1.1 × 10^-7 = [HS-][H3O+] / [H2S]

K2 = 1.3 × 10^-13 = [Se2-][H3O+] / [HSe-]

We can express [HSe-] in terms of [HS-] and [H2S] using the acid dissociation constant expression for H2S:

K1 = [HS-][H3O+] / [H2S]

1.1 × 10^-7 = x^2 / (0.200 - x)

Solving for x, we get:

x = 5.5 × 10^-5 M

This is the concentration of [HS-] and [H3O+] at equilibrium. To find the concentration of [Se2-], we can use the equilibrium constant expression for the reaction of HSe- with water:

K2 = [Se2-][H3O+] / [HSe-]

1.3 × 10^-13 = [Se2-](5.5 × 10^-5) / (0.200 - 5.5 × 10^-5)

Solving for [Se2-], we get:

[Se2-] = 2.6 × 10^-14 M

Therefore, the selenide ion concentration for a 0.200 M H2S solution that has the stepwise dissociation constant is 2.6 × 10^-14 M.

To know more about ion click here

brainly.com/question/14982375

#SPJ4

Answer:

A. Mixture

Explanation:

Answer:

d

Explanation:

because i did it