A solution containing molecular nonpolar molecules will conduct electricity
True or False?

First, let's separate both solutions:

We assume solutions are aditive.

Solution 1)

225mL of a 0.200 mol/L calcium bromide

Volume 1 = 225 mL = 0.225 L

Concentration 1 = 0.200 mol/L

Compound = calcium bromide = CaBr2

CaBr => Ca+2 + 2Br- (Bromide ions)

Concentration of bromide ions = 2 x 0.200 mol / L = 0.400 mol/L

Then, the moles of bromide ions = 0.225 L x 0.400 mol/L = 0.09 moles

Bromide ions 1 = 0.0900 moles

----------------------------------------------------------------------------------------------------------------

Solution 2)

We proceed the same as solution 1

Cobalt (III) bromide = CoBr3

CoBr3 => Co+3 + 3Br-

Concentration of Bromide ions = 3 x 0.450 mol/L = 1.35 mol/L

Moles of bromide ions = 1.35 mol/L x 0.155 L (155 mL) = 0.209 moles

Bromide ions 2 = 0.209 moles

---------------------------------------------------------------------------------------------------------------

The mixture of these 2 compounds

Total moles of Bromide ions = 0.0900 moles + 0.209 moles = 0.299 moles

Total volume = 0.225 L + 0.155 L = 0.380 L

Final concentration = 0.299 moles / 0.380 L = 0.787 mol/L

Answer: 0.787 mol/L

The force applied to the rocket by its engines remains constant as it moves up, while its mass decreases, resulting in an increase in acceleration.

Newton's laws of motion provide an explanation for the acceleration of a rocket as it moves away from the ground. According to Newton's second law, the force exerted on an object is directly proportional to its acceleration, and the force required to move an object increases as its mass increases.

In the case of a rocket, its mass decreases as it consumes fuel, which means that less force is required to move it as it climbs higher into the atmosphere.

As the rocket moves up, its acceleration increases while the force exerted on it remains constant. Newton's second law of motion explains that the acceleration of an object is directly proportional to the force applied to it. According to the second law of motion, an object's acceleration is equal to the force exerted on it divided by its mass.

This means that as the rocket climbs higher and its mass decreases due to the consumption of fuel, less force is required to accelerate it, and so its acceleration increases. In other words, the rocket's acceleration is increasing because the force required to move it is decreasing due to the decreasing mass of the rocket.

This phenomenon is also related to Newton's third law of motion, which states that every action has an equal and opposite reaction. The force exerted by the rocket's engines is balanced by an equal and opposite force exerted on the rocket by the exhaust gases, according to this law.

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Krypton, Chromium, and Oxygen with the following symbols Kr-13, Cr-2, and O-15 respectively have 23 electrons.

The atomic number of an atom determines the number of electrons it has. When the number of protons is equivalent to the number of electrons, the atom is electrically neutral. An anion, on the other hand, is an atom with a negative charge. It has gained an electron or two, or even more. Below are the chemical symbols for three different atoms or atomic anions with 23 electrons.Krypton:Kr has an atomic number of 36, indicating that it has 36 electrons. However, if we add 13 electrons to it, the total number of electrons becomes 49. Krypton with 13 additional electrons becomes Kr-13, with a total of 49 electrons.Chromium:Cr has an atomic number of 24, indicating that it has 24 electrons. Adding two more electrons to it, the total number of electrons becomes 26. The atomic anion with 26 electrons is Cr-2.Oxygen:Oxygen has an atomic number of 8, indicating that it has 8 electrons. However, if we add 15 electrons to it, the total number of electrons becomes 23. Oxygen with 15 additional electrons becomes O-15, with a total of 23 electrons.

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To solve this question, we need to know the atomic number of Ca, which is 20.

Atomic number = protons number = electrons number if the atom is neutral

Number of neutrons we calculate using the following formula:

A = p + n; where A = mass number; p = number of protons; n = number of neutrons.

For 40Ca:

Atomic number: 20

Number of protons: 20

Number of neutrons:

A = p + n

40 = 2 + n

n = 20

Number of electrons: 20

Mass number: 40

The element that is being referred to here is the element called Hafnium.

Now we know that the atomic number of an element shows us the number of electrons in the neutral atom or the number of protons in the atom. It is the identity of the element hence we can use it to identify what this isotope is.

The atomic number is the number that appears as a subscript in the symbol of an atom while the mass number appears as a superscript in the symbol of a compound. The symbol of an element helps us to identify it.

Now we can see that the isotope has 72 electrons and protons to ensure neutrality. Thus the element that is being referred to here is the element called Hafnium. It has 72 electrons, 72 protons and 116 neutrons

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Answer:

hhh

Explanation:

The volume of the gas is 9.510 L

What is molar volume of gas?

The molar volume, symbol Vm, or of a substance in chemistry and related sciences is the ratio of the volume occupied by a material to the amount of substance, usually provided at a certain temperature and pressure. It is calculated by dividing the molar mass (M) by the mass density (): The SI measure for molar volume is cubic metres per mole (m3/mol), however it is more common to use cubic decimetres per mole (dm3/mol) for gases and cubic centimetres per mole (cm3/mol) for liquids and solids.

According to the combined gas equation,
P1V1/T1 = P2V2/T2
given a constant molar amount of gas

P1V1/T1 = P2V2/T2

V2 = 9.510 L

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Answer:

gahwidsuacsgsuacayau1joagavahiq8wtw8quavakiafabajozyavqhaigavayquata

Explanation:

vahaiqgahiavavqugafayqigqvsbjsiagwyeiwvvs

Answer:

A. True

Explanation:

Answer:

B

Explanation:

Just because it is a theory doesnt mean it does not need evidence or odservations.

Answer:

it’s c

Explanation:

it’s c

The pH at one-half the equivalence point in an acid-base titration was found to be 3.94. The pKa of the unknown acid is 3.94.  

In an acid-base titration, the pH at the midpoint of the titration is equivalent to the pKa of the weak acid or weak base being titrated. In other words, the pH at the midpoint of a titration is equal to the negative logarithm of the dissociation constant (pKa) of the acid that is being titrated. The pKa value can be used to identify the unknown acid, since every acid has a unique pKa value.

The formula for the pH at the midpoint of a titration is:

pH = pKa + log([A-]/[HA])

where [A-]/[HA] is the ratio of the concentrations of the acid and its conjugate base at the midpoint of the titration. Since the titration is half-complete at the midpoint, the concentration of acid [HA] is equal to the concentration of conjugate base [A-].

Thus, the formula can be simplified as:

pH = pKa + log(1) = pKa .Therefore, in this case, the pKa of the unknown acid is 3.94.

To identify the acid, we can consult a table of pKa values and look for an acid with a pKa value of 3.94. One example of an acid with a pKa of 3.94 is 4-methoxybenzoic acid (pKa = 3.92).

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The north pole of one magnet is near the South pole of the other magnet.

The ends of a magnet are called its poles. One end is called the north pole, the other is called the south pole. If you line up two magnets so that the south pole of one faces the north pole of the other, the magnets will pull toward each other.

Answer:its b

Explanation:

jusut bcss

Answer:

Chemical Change

Explanation:

Chemical changes occur when bonds are broken and/or formed between molecules or atoms. This means that one substance with a certain set of properties (such as melting point, color, taste, etc) is turned into a different substance with different properties.

Answer: C.

Explanation:

Sexual reproduction takes longer and requires more energy than asexual reproduction.

Answer:

d. the relative proportions of the elements in the compound.

Explanation:

The chemical formula of a compound indicates the relative proportions of the element in the compound.

Answer:

The answer is D) 51.2%

Explanation:

5.12g of 10.00g of the substance is water:

percentage of water= 5.12 x 10.00 =51.2%

Answer:

b

Explanation:

Answer:

2.74

Explanation:

Okay, let's go through the previous steps:

Pre-1982 pennies contribute 1.24 g to the overall mass

Post-1982 pennies contribute 1.50 g to the overall mass

To calculate the weighted average mass, I'll add these contributions together:

Pre-1982 contribution: 1.24 g

Post-1982 contribution: 1.50 g

Total weighted average mass = 1.24 g + 1.50 g = 2.74 g

Formula that contains K+ and PO4-3

To find this formula, we need to exchange the oxidation states:

The charge of the compound has to be 0.

---------------------------------------------------------

Let's see:

K+ is a cation.

PO4-3 is an anion.

These ions are from this compound K3PO4, a salt.

When a salt ionizes, it gives anion and cation.

Anion and cation are ions.

You need to be aware of the temperature and pressure requirements for a given chemical in order to locate spots on a phase diagram.

A phase diagram is a graph that displays, as a function of temperature and pressure, the equilibrium conditions between a substance's various states of matter (solid, liquid, and gas). The regions of the phase diagram that correspond to the solid, liquid, and gas states are often delineated by a sequence of curves, along with the intersections of these regions.

You need to be aware of the substance's temperature and pressure conditions in order to pinpoint a point on a phase diagram. For instance, you can identify a point on the phase diagram if you have a sample of a substance at a specific temperature and pressure.

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Answer:Solving these equations, we see that, beginning with 6.0 grams of aluminum, 0.22 moles of AlCl3 can be formed, and that, beginning with 3.8 grams of chlorine, 0.036 moles of AlCl3 can be formed.

Explanation:

Answer:

B

Explanation:

The mixture gave off heat

Answer: C not really sure thoo

Answer:

yess Petroleum—or crude oil—is a fossil fuel that is found in large quantities beneath the Earth's surface and is often used as a fuel or raw material in the chemical industry.

hey bro how are you??

Answer:

Petrochemicals are chemical products derived from petroleum, although many of the same chemical compounds are also obtained from other fossil fuels such as coal and natural gas or from renewable sources such as corn, sugar cane, and other types of biomass.

Answer:

The sources of petrochemical are: fossil fuel such as coal and natural gases or from renewable sources such corn, sugar, cane and other types of biomass .

Explanation:

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Answer:

the volume of a gas is changed from ___ mL to 852 mL, the temperature will change from 588 K to 725 K.V(volume) = [?] mLAssume that the number of moles and the pressure remain constant.To find the initial volume of the gas, we can use the combined gas law, which states that: (P1V1)/T1 = (P2V2)/T2 We are given the initial temperature T1 = 588 K and the final temperature T2 = 725 K. We are also told that the number of moles and the pressure remain constant, so we can assume that P1 = P2 and n1 = n2. Let's plug in the values we have: (P1V1)/588 = (P1*852)/725 Simplifying this equation, we can isolate V1: V1 = (588*852)/725 V1 = 691.2 mL Therefore, the initial volume of the gas was 691.2 mL.

In the context of this problem, we can utilize Charles's Law which states the volume of a gas is directly proportional to its absolute temperature. We solve for the unknown volume (V1) using the provided values and the formula derived from Charles's Law. The estimated answer is approximately 686 mL.

The subject of your question involves the concept of gas laws specifically the Charles's Law which states that the volume of a gas is directly proportional to its absolute temperature, provided the number of moles and pressure remain constant. In this scenario, we can apply Charles's Law as both the number of moles and pressure are constant. To find the unknown volume, we should use the formula (V1/T1) = (V2/T2), where V1 is the unknown volume, T1 is the initial temperature, V2 is the final volume and T2 is the final temperature. In this case, the question left V1 blank, T1 is 588K, V2 is 852 mL and T2 is 725K. So its critical to ensure that temperatures are in Kelvin.

Arranging the formula to solve for V1, we have: V1 = (V2 * T1) / T2. Substituting the given values, we get: V1= (852 mL * 588 K) / 725 K = 685.9 mL

Therefore, the unknown volume V1, when the gas was initially at a temperature of 588K, would be approximately 686 mL.

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1.54 × 10²⁴ atoms He

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

[Given] 2.56 moles He

[Solve] atoms He

Step 2: Identify Conversion

Avogadro's Number

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

1.54163 × 10²⁴ atoms He ≈ 1.54 × 10²⁴ atoms He

Answer:

000.19900010

Explanation:

divide the number of times the event occurs by the length of time. Example: Anna divides the number of website clicks (236) by the length of time (one hour, or 60 minutes)

Answer:

45.7g of CO₂ is the maximum amount of carbon dioxide that could be produced.

Explanation:

Hexane, C₆H₁₄, reacts with O₂ to produce H₂O and CO₂ as follows:

C₆H₁₄ + 13/2O₂ → 7H₂O + 3CO₂

Where 1 mole of hexane reacts with 13/2 moles of O₂.

To solve this question we need to convert the mass of each reactant to moles in order to find the limiting reactant. With limiting reactant we can find the maximum amount of CO₂ produced:

Moles C₆H₁₄ -Molar mass: 86.18g/mol-:

64g C₆H₁₄ * (1mol / 86.18g) = 0.7426 moles C₆H₁₄

Moles O₂ -Molar mass: 32g/mol-:

72.0g O₂ * (1mol / 32g) = 2.25 moles O₂

For a complete reaction of 2.25 moles of O₂ are required:

2.25 moles O₂ * (1mol C₆H₁₄ / 13/2 moles O₂) = 0.346 moles of C₆H₁₄

As there are 0.7426 moles of C₆H₁₄, C₆H₁₄ is the excess reactant and:

Oxygen is limiting reactant.

The maximum moles of CO₂ that could be produced are:

2.25 moles O₂ * (3mol CO₂ / 13/2 moles O₂) = 1.038 moles CO₂

In grams:

1.038 moles CO₂ * (44.01g / mol) =