Determine the number of protons and neutrons in plutonium-239 and enter its symbol in the form azx.

Answers

Answer 1

Answer:

number of protons: 94
number of neutrons: 145

239
       Pu
   94

Explanation:

1) The atomic number, Z, of plutonium is Z = 94, i.e plutonium 94 protons

2) Plutoniun-239 is the isotope with mass number 239.

3) Mass number = number of protons + number of neutrons =>

number of neutrons = mass number - number of protons = 239 - 94 = 145

4) The notation requires that you indicate the symbol of the element with the atomic number (number of protons) and the mass number.

You put the mass number as a superscript at the left side of the symbol and the atomic number as subscript to the left of the symbol.

So, in this case the symbol is Pu, the superscript to the left is 239 and the subscript to the left is 94.

239
       Pu
   94

Answer 2

Plutonium-239 has 94 protons and 145 neutrons in its nucleus, represented by the symbol 239Pu.

Plutonium-239 has 94 protons and a mass number of 239. To find the number of neutrons, you subtract the number of protons from the mass number: 239 - 94 = 145 neutrons. The symbol for Plutonium-239 is 239Pu.

1. Protons (Z): The atomic number (Z) for plutonium (Pu) is 94. Hence, plutonium-239 has 94 protons.

2. Neutrons (N): The mass number (A) for plutonium-239 is 239. The number of neutrons (N) is calculated by subtracting the number of protons (Z) from the mass number (A), i.e., N = A - Z. Therefore, N = 239 - 94 = 145. Thus, plutonium-239 has 145 neutrons.

Related Questions

What are the properties of the aluminum in the can

Answers

the properties of aluminium include low density and therefore low weight, high strength, superior malleability, easy machining, excellent corrosion resistance and good thermal and electrical conductivity are amongst aluminium's most important properties. Aluminium is also very easy to recycle.
Hope this helps:D
Have a great rest of a brainly day!

Which of the following could you do to increase the strength of an electromagnet? decrease the number of windings decrease the electric current change the core from wood to iron all of the above

Answers

I believe the most appropriate answer would be to change the core from wood to iron. This is because iron is a magnetic material while wood is not magnetic hence cant acquire magnetism. Other factors that would increase the strength of electromagnet would be; increasing the amount of electric current, and increasing the number of windings.

Answer:

to change the core

Explanation:

You mix sugar in water and stir until it's completely dissolved. in this system, the water is the ________, the sugar is the ________, and the end result is a ________. solute; solution; solvent solvent; solution; solute solution; solvent; solute solvent; solute; solution solute; solvent; solution

Answers

A solution is a homogenous mixture of two or more substances. A solute is a substance that dissolves. A solvent is a substance in which other substances dissolve in. Using these definitions above the answer will hence be choice number 4. solvent;solute;solution.

Answer: water is the solvet, sugar is the solute and the the end result is a solution.

Explanation:

Binary Solution is a homogeneous mixture of two components called as solute and solvent.

Solute is the component which is present in smaller proportion and is solid for solid in liquid solution and solvent is the component which is present in larger proportion and is liquid for solid in liquid solution.

Concentrated solution is one in which there is more amount of solid.

Dilute solution is one in which there is more amount of liquid.

Thus as sugar is lesser in amount , it is the solute. Water is preset in larger amount, thus it is the solvent and the end result is the solution.

What is the approximate total number of atoms in a 1.0 mole of lithium?

Answers

To solve the problem we will use the following equation:

n(Li) = N(Li) / NA

n - the number of moles

N - the number of particles

NA - Avogadro's number that has following value: 6.022×10²³ mol⁻¹

From the upper relation follows:

N(Li) = n(Li) × NA

N(Li) = 1mole × 6.022×10²³ mol⁻¹ = 6.022×10²³ atoms of lithium

Answer:

6.0 × 10^23

Explanation:

Big brain mode

Which of the following can be measured in amps with an ammeter

Answers

I believe it is current. An ammeter is a measuring instrument used to measure the current in a circuit. Electric currents are measured in amperes (A), hence the name. Instruments used to measure smaller currents, milliampere or microampere range, are designated as milliammeters or microammeters.

Note: Moles to grams, or grams to moles you will need to use molar mass (g/mol).
1)How many moles are in 20.2 g HCl?
2) How many grams are in 2 moles of HCl?

Note: When converting from moles to molecules, you need the following: 1 mole = 6.022 x 1023 molecules
3) How many molecules are in 23 moles of Sodium?
4) How many moles are in 8.022 x 1026 molecules of NaCl?

Note: 1 mole = 22.4 L
5) How many moles are in 5 Liters of H2 gas?
6) How many Liters are in 5 moles of H2 gas?

Multiple Conversions in one problem.
7) How many grams of HCl will be produced with 16.2 grams of H2 and excess Cl2? (H2 + Cl2 -> 2HCl)

8) How many Liters are there in 46 g of Cl2 gas?

Answers

1) Answer is: there is 0,554 moles in 20,2 grams of HCl.
m(HCl) = 20,2 g.
M(HCl) = 1,01 g/mol + 35,45 g/mol.
M(HCl) = 36,46 g/mol.
n(HCl) = m(HCl) ÷ M(HCl).
n(HCl) = 20,2 g ÷ 36,46 g/mol.
n(HCl) = 0,554 mol.
n - amount of substance.

2) Answer is: there is 72,92 grams in 2 moles of HCl.
n(HCl) = 2 mol.
M(HCl) = 1,01 g/mol + 35,45 g/mol.
M(HCl) = 36,46 g/mol.
m(HCl) = n(HCl) · M(HCl).
n(HCl) = 2 mol · 36,46 g/mol.
n(HCl) = 72,92 g.
M - molar mass.

3) Answer is: there is 1,385·10²⁵ atoms ins 23 moles of sodium.
n(Na) = 23 mol.
N(Na) = n(Na) · Na.
N(Na) = 23 mol · 6,022·10²³ 1/mol.
N(Na) = 1,385·10²⁵.
Na - Avogadro number.
N - number of particles.

4) Answer is: there is 1332 moles in 8,022·10²⁶ molecules of NaCl.
N(NaCl) = 8,022·10²⁶.
N(NaCl) = n(Na) · Na.
n(NaCl) = N(NaCl) ÷ Na.
n(NaCl) = 8,022·10²⁶ ÷ 6,022·10²³ 1/mol.
n(NaCl) = 1,332·10³ mol = 1332 mol.
Na - Avogadro number.
N - number of particles.

5) Answer is: there is 0,223 moles in 5 liters of hydrogen gas.
V(H₂) = 5 L.
n(H₂) = ?.
Make proportion: 5 L : n(H₂) = 22,4 L : 1 mol.
22,4 · n(H₂) = 5 L · 1 mol.
n(H₂) = 0,223 mol.
V - volume of hydrogen gas.

6) Answer is: there is 112 liters in 5 moles of hydrogen gas.
n(H₂) = 5 mol.
V(H₂) = ?.
Make proportion: 5 mol : V(H₂) = 1 mol : 22,4 L
22,4 L · 5 mol = V(H₂) · 1 mol.
V(H₂) = 112 L.
V - volume of hydrogen gas.
n - amount of substance.

7) Answer is: there is 584,81 grams of HCl.
Chemical reaction: H₂ + Cl₂ → 2HCl.
m(H₂) = 16,2 g.
n(H₂) = m(H₂) ÷ M(H₂).
n(H₂) = 16,2 g ÷ 2,02 g/mol.
n(H₂) = 8,02 mol.
From chemical reaction: n(H₂) : n(HCl) = 1 : 2.
n(HCl) = 16,04 mol.
m(HCl) = 16,04 mol · 36,46 g/mol.
m(HCl) = 584,81 g.

8) Answer is: there is 14,51 liters in 46 g of Cl₂ gas.
m(Cl₂) = 46 g.
n(Cl₂) = m(Cl₂) ÷ M(Cl₂).
n(Cl₂) = 46 g ÷ 70,9 g/mol.
n(Cl₂) = 0,648 mol.
Make proportion: 0,648 mol : V(Cl₂) = 1 mol : 22,4 L.
V(Cl₂) = 0,648 mol · 22,4 L ÷ 1 mol.
V(Cl₂) = 14,51 L.

Examine the nuclear reaction: mc007-1.jpg. Why is this classified as a nuclear reaction rather than a chemical reaction? It is not balanced. A new compound is formed. A change has occurred in a nucleus. A new element has been formed.

Answers

It is a nuclear reaction since a change has occurred in the nucleus. In nuclear reactions the particles in the nucleus are changed and one element is transformed into another element when particles in the nucleus gained are lost. Unlike chemical reactions which involve the electrons in an atom, nuclear reaction involve the nucleus. A nuclear reaction may be a nuclear fission or nuclear fusion; An example of nuclear reaction is where two isotopes of hydrogen (tritium and deuterium) are fused together under high pressure and temperature, to form a more stable atom of helium. This is an example of nuclear fusion reaction.

Answer:

B/ the second option

Explanation:

This is the answer on e2020

CAN YOU MAKE ME BRAINLIEST

Water is a polar solvent. Which of the following will not dissolve in water?

A. table salt
B. Olive oil
C. Vinegar
D.Surgar

Answers

Answer: option B.olive oil.

Explanation.

The general rule of thumb when you analyze the ability of a solvent to dissolve a solute is that lke dissolves like.

That means:

1) polar solvents dissolve ionic or polar solutes

2) Non-polar solvents dissolve non-polar solutes

3) Non-polar solvents do not dissolve polar and ionic solutes

4) Polar solvents do not dissolve non-polar solutes.

There are exceptions, but the rule is applicable in here.

A. table salt: it is NaCl, a ionic compound, so the water which is a polar solvent will dissolve the table salt.

B. Olive oil: the oils are non-polar organic compounds, so it will not be dissolved in a polar solvent.

C. Vinegar: vinegar is acetic acid, which is a polar organic compound, so it will be dissolved in water.

D. Sugar: sugar (sucrose) is a polar organic compound, so it will get dissovled in water.

Consider the following balanced final equation. NO2 + CO mc014-1.jpg NO + CO2 Which is the correct step(s) for this reaction mechanism?

Answers

The overall reaction provided is as follows:

NO₂ + CO → NO + CO₂

The reaction proceeds under the following two step mechanism:

Step 1: NO₂ + NO₂ → NO + NO₃ (slow)

Two molecules of nitrogen dioxide react to form NO and NO₃ which is the slow step in the mechanism. The NO₃ that is formed goes on to react with the carbon monoxide that leads to the formation of NO₂ and CO₂ and this is the fast step in the mechanism.

Step 2: NO₃ + CO → NO₂ + CO₂ (fast)

Now we combine both reactions to get the overall reaction:

NO₂ + NO₂ → NO + NO₃
NO₃ + CO → NO₂ + CO₂
NO₂ + CO → NO + CO₂

The overall reaction agrees with the reaction provided in the question.

Answer b is the answer for the equation:

Which of the following is NOT a characteristic of a strong acid and a strong base?

Has a [H+] higher than water

Completely dissociates in water

Has a pH at the extreme end of the scale

Is corrosive to most metals

Answers

The first one is the correct choice. We have that bases have [H+] lower than that of water since the product of H+ and OH- concentration in water is constant; in acids H+ are more than OH-, in bases H+ are less than OH- and in neutral PH (water) H+=OH- ; hence in bases OH->H+ . We have that strong bases and strong acids dissociate completely in water (by definition), their pHs are as much far from the middle of the pH scale (7) as possible (around 0 for acids or 14 for bases) and they corrode metals due to how drastic they are.

Please check this for me?
Question: When the ore lead (ii) sulfide burns in oxygen, the products are solid lead (ii) oxide and sulfur dioxide gas.

My answer: PbS (s) + O2 (g) --> PbO (s) + SO2 (g)

I wanted to know if I'm correct before I balance.

Answers

The answer is
2PbS(s) + 3O2(g) = 2PbO(s) + 2SO2(g)

Your answer is not yet balanced because you have 3 oxygen atoms. it should be balanced by multiplying both side by 2 such as the balanced equation I made. To check it, I will explain why your answer is not yet balanced.

check: (from your equation)
1-Pb-1
1-S-1
2 -O-3
the difference between the reactant and the product of Oxygen will prove that it is not yet balanced.

If you use 2PbS(s) + 3O2(g) = 2PbO(s) + 2SO2(g), to check it:
2-Pb-2
2-S-2
6 -O-6
then this is now balance

What mass due to waters of crystallization is present in a 3.38 g sample of FeSO4 •7H2O?

Answers

First, it is necessary to have the molar mass of FeSO4 • 7H2O and molar mass of compound without water FeSO4.

M(FeSO4 • 7H2O) = 54+32+(16x4)+7(2+16) = 276 g/mole

M(FeSO4) = 54+32+(16x4) = 150 g/mole

When the molar mass value of iron(II) sulfate heptahydrate is subtracted from the molar mass value of iron(II) sulfate we get the total molar mass of water in crystal:

M(H20) = M(FeSO4 • 7H2O) - M(FeSO4) = 276 - 150 = 126 g mole

Now we can determine how much water there are in 3.2 g of the crystal:

M(FeSO4 • 7H2O) : M(H20) = m(FeSO4 • 7H2O) : m(H20)

276 : 126 = 3.38 : x

x = 425.88 / 276 = 1.54 g of H2O

The mass due to water of crystallization present in a 3.38 g sample of FeSO4 •7H2O is 1.53 g

What is water of crystallization?

The water of crystallization is the moles of water present in one molecule of a salt which forms part of the crystal lattice.

For the given salt:

molar mass of salt FeSO4 •7H2O = 278 g/mol

mass of water on 1 mole FeSO4 •7H2O = 7 × 18 = 126 g

Mass due to waters of crystallization present in a 3.38 g sample of FeSO4 •7H2O = 3.38 × 126/278

Mass of water of crystallization = 1.53 g

Therefore, the mass due to water of crystallization present in a 3.38 g sample of FeSO4 •7H2O is 1.53 g.

Learn more about water of crystallization at: https://brainly.com/question/26146814

How many carbon atoms are in 15.6 kg of acetone? acetone is ch3coch3. the density of acetone is 1.30 g/ml?

Answers

Answer is: 4,859·10²⁶ atoms of carbon.
m(CH₃COCH₃) = 15,6 kg · 1000 g/kg = 15600 g.
n(CH₃COCH₃) = m(CH₃COCH₃) ÷ M(CH₃COCH₃).
n(CH₃COCH₃) = 15600 g ÷ 58 g/mol.
n(CH₃COCH₃) = 268,965 mol.
N(CH₃COCH₃) = n(CH₃COCH₃) · Na.
N(CH₃COCH₃) = 268,965 mol · 6,022·10²³ 1/mol.
N(CH₃COCH₃) = 1,619·10²⁶.
There is three atoms of carbon in one molecule of acetone, so:
n(C) = 3 · 1,619·10²⁶ = 4,859·10²⁶.

15.6 kg is equivalent to 15600 g
The molar mass of acetone is 58 g/mole
Therefore; 15600/58 = 269 moles
1 mole of acetone contains 3 × 6.022 × 10^23 atoms
Therefore, 269 moles of acetone would contain;
269 × 3× 6.022 ×10^23 atoms
= 4.86 ×10^26 atoms of carbon

In the correctly balanced equation, what are the coefficients for H2, Cl2, and HCl (respectively)? ___H2 + ___Cl2 → ___HCl 1,1,1 2,2,1 1,1,2 2,1,2

Answers

Final answer:

The correctly balanced equation for the reaction between hydrogen (H2) and chlorine (Cl2) to form hydrogen chloride (HCl) is H2 + Cl2 → 2 HCl, with the coefficients being 1 for H2, 1 for Cl2, and 2 for HCl.

Explanation:

The question concerns balancing a chemical equation, which falls under the field of Chemistry, specifically with relation to stoichiometry, the part of chemistry that concerns the quantities of substances that come into play during chemical reactions.

In the chemical equation H2 + Cl2 → HCl, to balance it, you need to ensure that the number of atoms of each element is equal on both the reactant and product sides. After balancing the equation, it takes the form H2 + Cl2 → 2 HCl. This means that the coefficients for hydrogen (H2), chlorine (Cl2), and hydrogen chloride (HCl) are 1, 1, and 2 respectively.

Final answer:

To balance the equation between hydrogen gas (H₂) and chlorine gas (Cl₂) forming hydrogen chloride (HCl), we add a coefficient of 2 in front of HCl. This yields a balanced chemical equation where the coefficients for H₂, Cl₂, and HCl are 1, 1, and 2, respectively.

Explanation:

The equation given is a combination of hydrogen gas (H₂) and chlorine gas (Cl₂) to form hydrogen chloride (HCl). To balance the equation, we should have equal numbers of each type of atom on both sides of the equation. We start with hydrogen and chlorine atoms, and then balance the number of hydrogen chloride molecules produced.

Initially, we have the equation:

H₂ + Cl₂ → HCl

This is not balanced because we have 2 hydrogen atoms on the left and only 1 on the right; similarly, we have 2 chlorine atoms on the left but only 1 on the right. By placing a coefficient of 2 in front of HCl, which indicates we are producing 2 molecules of it, the equation becomes:

H₂ + Cl₂ → 2 HCl

Now, with two atoms of both hydrogen and chlorine on each side of the equation, the chemical equation is balanced. Therefore, the correct coefficients are 1 for H₂, 1 for Cl₂, and 2 for HCl, respectively.

Identify the solute with the lowest van't hoff factor.

Answers

the answer is Nonelectrolyte
when Van't Hoff factor is express the number of ions and particles which are formed in the solution. And the nonelectrolyte is a compound which doesn't form hydrated ions in solution.
So the correct answer is nonelectrolyte as it doesn't dissolve as ions.

I'm a really stuck in this. I kind of suck in chemistry, please help me. I would really appreciate it.

I have to write one to two paragraphs about : What is the relationship between the atomic numbers and ionic radii of the elements in group 1?

And

What is the relationship between atomic numbers and first ionization energies?

These Are The Elements in group 1 of the periodic table:

lithium
sodium
potassium
rubidium
cesium

Answers

Group 1 can be characterized as atoms that have 1 electron in their valence shell. This is valuable when dealing with these questions, because the loss or gain of valence electrons is what defines ionic relationships. When group 1 elements form ionic bonds with other atoms, they are extremely likely to lose their valence electron, since the nucleus has a weaker pull on it than, say, a chlorine atom has on its 7 valence electrons. The weaker pull between the nucleus and the valence electron of group 1 elements means that the radius is high, since the electron is more free to move with less pull on it. This also means that the first ionization energy is low, since it takes relatively little energy for that electron to be pulled away to another atom.

A compound containing sodium, chlorine, and oxygen is 25.42% sodium by mass. A 3.25 g sample gives 4.33×1022 atoms of oxygen. What is the empirical formula?

Answers

step one
calculate the % of oxygen
from avogadro constant
1moles = 6.02 x 10 ^23 atoms
what about 4.33 x10^22 atoms
= ( 4.33 x 10^ 22 x 1 mole ) / 6.02 10^23= 0.0719 moles
mass= 0.0719 x16= 1.1504 g
% composition is therefore= ( 1.1504/3.25) x100 = 35.40%
step two
calculate the % composition of chrorine
100- (25.42 + 35.40)=39.18%

step 3
calculate the moles of each element
that is
Na = 25.42 /23=1.1052 moles
Cl= 39.18 /35.5=1.1037moles
O= 35.40/16= 2.2125 moles
step 4
find the mole ratio by dividing each mole by 1.1037 moles
that is
Na = 1.1052/1.1037=1.001
Cl= 1.1037/1.1037= 1
0=2.2125 = 2
therefore the empirical formula= NaClO2

The empirical formula of the compound containing sodium, chlorine, and oxygen is 25.42% sodium by mass. A 3.25 g sample gives 4.33×10²² atoms of oxygen is NaClO₂.

Step 1: Calculate the mass of sodium in the sample

Mass of sample: 3.25 gPercentage of sodium: 25.42%Mass of sodium: 3.25 g × 0.2542 = 0.827 g

Step 2: Calculate the number of moles of sodium

Molar mass of sodium: 22.98 g/molNumber of moles of sodium: 0.827 g ÷ 22.98 g/mol = 0.0360 mol

Step 3: Calculate the number of moles of oxygen

Number of oxygen atoms: 4.33 × 10²² atomsAvogadro's number: 6.022 × 10²³ atoms/molNumber of moles of oxygen: 4.33 × 10²² atoms ÷ 6.022 × 10²³ atoms/mol = 0.0720 mol

Step 4: Calculate the mole ratio of sodium to oxygen

Mole ratio: Na:O = 0.0360 mol : 0.0720 mol = 1:2

Step 5: Calculate the mass of chlorine in the sample

Mass of sample: 3.25 gMass of sodium: 0.827 gMass of oxygen: 0.0720 mol × 16.00 g/mol = 1.15 gMass of chlorine: 3.25 g - 0.827 g - 1.15 g = 1.28 g

Step 6: Calculate the mole ratio of chlorine to sodium

Number of moles of chlorine: 1.28 g ÷ 35.45 g/mol = 0.0361 molMole ratio: Cl:Na = 0.0361 mol : 0.0360 mol = 1:1

Step 7: Write the empirical formula

The empirical formula is NaClO₂, which matches the given information.

Therefore, the empirical formula of the compound is NaClO₂.

A flask contains a gas mixture of methane, hydrogen, and nitrogen with partial pressures of 1 atm, 1.2 atm, and 1.1 atm, respectively. What is the total pressure of the mixture?

Answers

3.3. Just add all the partial pressures together to get the total pressure.

Answer:

3.3 atm

Explanation:

This is a simple application of Dalton's law of partial pressure which state that the total pressure exerted by a mixture of gas is the sum of the individual partial pressure of the component gases.

[tex]P_{total} = P_1 + P_2 + ........ + P_n[/tex]

Hence, the total pressure of the gas mixture becomes:

[tex]P_{total} = P_{methane} + P_{hydrogen} + ........ + P_{nitrogen}[/tex]

= 1 + 1.2 + 1.1

= 3.3 atm

The total pressure of the mixture is 3.3 atm

Which is true of ionic compounds? They have characteristically low melting and low boiling points. They are electrically charged, either positive or negative. They contain no charged particles. They form hard, brittle crystals with characteristic shapes.

Answers

The answer is they are electrically charged either positive or negative.
Ionic compounds will be compounds comprised of particles. These particles are atoms that pick up or lose electrons, giving them a net positive or negative charge. Metals have a tendency to lose electrons, so they progress toward becoming cations and have a net positive charge.

What are charged atoms of elements that have an unequal number of protons and electrons?

Answers

if the number of electron is more than the protons,the atom is negative
if the number of electrons is less than the protons, the atom will be positive

6.0 g of copper was heated from 20 degree c to 90 degree c . How much energy was used to heat cu?

Answers

Copper heat capacity would be 0.385J/C*gram which means it needs 0.385 Joule of energy to increase 1 gram of copper temperature by 1 Celcius. The calculation would be:
energy= heat capacity *mass * temperature difference
energy= 0.385J/C*gram * 6g * (90-20)
energy= 161.7J

Which of the following elements are nonmetals? A. lithium (Li) and barium (Ba) B. palladium (Pd) and zinc (Zn) C. nitrogen (N) and sulfur (S) D. beryllium (Be) and magnesium (Mg)

Answers

Answer:

C. Nitrogen (N) and sulfur (S)

Explanation:

Hello,

In this case, we could differentiate the nonmetals from the metals by understanding they do not have or have very tiny values of properties such as bright, hardness, electric conductivity, heat conductivity and others. Moreover, they are allocated at the right of the periodic table. In such a way, since nitrogen tends to be a gas and sulfur a yellowish powder, they are classified as nonmetals whereas, lithium, barium, palladium, zinc, beryllium and magnesium are considered as metals as they have the aforementioned properties.

Best regards.

We can see here that the nonmetals among the options provided are:

C. Nitrogen (N) and Sulfur (S)

What is nonmetal?

Nonmetals are a group of elements found on the right side of the periodic table. They are characterized by their properties, which are distinct from those of metals.

Nonmetals generally have properties such as being poor conductors of heat and electricity, having lower melting and boiling points, and being more brittle compared to metals. Nitrogen and sulfur are both nonmetals, whereas the other elements listed in the options (lithium, barium, palladium, zinc, beryllium, and magnesium) are metals or metal-like elements.

Learn more about nonmetals on https://brainly.com/question/16749127

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Ga2O3(s) + 3SOCl2(l) --> 2GaCl3(s) +3SO2
In a certain reaction, 71.8 g of Ga2O3 is reacted with 110.8 g SOCl2.The GaCl3 produced is collected and its mass founded to be 97.66 g.
What is the theoretical yield of GaCl3?

Answers

The balanced equation is;
Ga2O3 + 3 SOCl2 → 2GaCl3 + 3SO2
the no. of moles of Ga2O3 = Weight / Molecular weight
= 71.8 / 187.44 = 0.383 moles >>> (1)
the no. of moles of SOCl2 = (Wt / M.wt) / 3 = (110.8/119)/3 = 0.310 moles >>> (2)
From (1) and (2),
∴ SOCl2 determines the yield of the reaction (lower no. of moles)
∴ No. of moles of GaCl3 = 0.310 * 2 = 0.620 moles >>> (3)
∴ the theoritical yield (weight in gram) of GaCl3 = no. of moles * M.wt.
= 0.620 * 176= 109.12 g

If 23 g of sodium reacts completely with 71 g of chlorine, ______ grams of product would be expected. Round your answer to the nearest gram. what would be the answer?

Answers

If 23 g of sodium reacts completely with 71 g of chlorine, the limiting reactant is determined, and approximately 59 grams of sodium chloride (NaCl) can be produced.

1. Calculate the moles of each reactant:

Sodium: 23 g / 23 g/mol = 1 mol

Chlorine: 71 g / (2 * 35.5 g/mol) = 1 mol

2. Determine the limiting reactant:

In this case, both sodium and chlorine have the same number of moles (1 mol each). Therefore, neither is technically "limiting" the reaction. However, for calculating the theoretical yield (maximum amount of product), we need to consider that one reactant might be completely consumed before the other.

3. Calculate the grams of product based on the limiting reactant (assuming complete consumption of one reactant):

Since both reactants have the same amount, choosing either sodium or chlorine as the limiting reactant will give the same result. Let's assume sodium is completely consumed.

NaCl produced: 1 mol Na x (1 mol NaCl / 1 mol Na) x (23 g NaCl/mol + 35.5 g NaCl/mol) = 58.5 g NaCl

4. Round the answer to the nearest gram:

58.5 g rounded to the nearest gram is 59 g.

Therefore, if 23 g of sodium reacts completely with 71 g of chlorine, we can expect around 59 grams of sodium chloride (NaCl) to be produced.

Final answer:

If 23 g of sodium reacts with 71 g of chlorine, based on stoichiometry and the limiting reagent principle, 94 grams of sodium chloride would be the expected product, rounded to the nearest gram.

Explanation:

If 23 g of sodium reacts completely with 71 g of chlorine, the amount of product formed can be determined using stoichiometry based on the balanced chemical equation 2 Na(s) + Cl2(g) → 2 NaCl(s).

Based on the molar mass of the reactants and products, we can conclude that 45.98 amu of sodium will react with 70.90 amu of chlorine to produce 275.9 amu of sodium chloride. Converting these amounts to grams, we find that every 22.99 g of sodium reacts with 35.45 g of chlorine to produce 58.45 g of sodium chloride (NaCl).

Given the ratio of sodium to chlorine to sodium chloride is 1:1.545:2.54 in terms of grams, we can calculate that 23 g of sodium will react with 35.54 g (23 g × 1.545) of chlorine to produce a total of 58.54 g (23 g × 2.54) of sodium chloride. Since the question states that we have 71 g of chlorine, sodium is the limiting reagent, and therefore the maximum yield of NaCl will be based on the amount of sodium.

Thus, if 23 g of sodium reacts completely with 71 g of chlorine, 94 grams of sodium chloride (NaCl) would be the expected rounded product to the nearest gram.

Why are graphs used to understand an objects motion?

Answers

Hello!

Graphs are used to understand an object's motion because they can show the exact location of the object at any given moment.

This is done with the help of a reference system. The most common reference system is the Cartesian coordinate system, which describes the location of an object through a set of 2 or 3 coordinates (depending if the system is in 2D or 3D).

Studying graphs of movement, we can know if the movement is cyclical, or the direction of the movement, determine tendencies and overall getting an unambiguous and precise understanding of the motion.

Have a good day!

In the reaction below, hydrogen peroxide decomposes to water. MM H2O2 = 34.02 g/mol MM H2O = 18.02 g/mol MM O2 = 32 g/mol 2H2O2 → 2H2O + O2 If 14.3 moles of H2O2 is decomposed, how many grams of oxygen gas are produced? Show ALL your work to get full credit.

Answers

Answer: 228.8 g of O2 are produced

Work:

1) Write the give balanced chemical equation:

2H2O2 → 2H2O + O2

2) molar ratios

2 mol H2O2 : 2 mol H2O :1 mol O2

3) proportion with the unknown quantity number of moles of O2:

x 1 mol O2
---------------------- = -----------------------
14.3 mol H2O2 2 mol H2O2

4) Solve for x:

x = 1 mol O2 * 14.3 mol H2O2 / 2 mol H2O2 = 7.15 mol O2

5) Use the molar mass of O2 to convert 7.15 mol O2 to grams

molar mass of O2 = 2 * atomic mass of O = 2 * 16.00 g/mol = 32.00 g/mol

molar mass = mass in grams / number of moles

=> mass = molar mass * number of moles

mass of O2 = 32.00 g / mol * 7.15 mol = 228.8 g

Answer: 228.8 g

10,300 milliliters is the same as: cm3 and L

Answers

Answer : The 10300 milliliter in [tex]cm^3[/tex] and L are, [tex]10300 cm^3[/tex] and 10.3 L respectively.

Explanation :

The conversion used from milliliters to centimeter cube is:

[tex]1ml=1cm^3[/tex]

As we are given the volume 10300 ml. Now we have to determine the volume in centimeter cube.

As, [tex]1ml=1cm^3[/tex]

So, [tex]10300ml=\frac{10300ml}{1ml}\times 1cm^3=10300cm^3[/tex]

The volume in centimeter cube is, [tex]10300cm^3[/tex]

The conversion used from milliliters to liter is:

1 ml = 0.001 L

As we are given the volume 10300 ml. Now we have to determine the volume in liter.

As, 1 ml volume = 0.001 L

So, 10300 ml volume = [tex]\frac{10300ml}{1ml}\times 0.001L=10.3L[/tex]

The volume in liter is, 10.3 L

Answer:

The 10300 milliliter in and L are, and 10.3 L respectively.

Explanation:

The periodic law describes trends seeing across which of the following?

Periods within the periodic table
Radio activity within the periodic table
Elements with the same number of protons
The top half of periodic table

Answers

A.) Periods within the periodic table. :)

Braddy connected the lose wire to the battery and created an electromagnet. He picked up 45 thumb tacks with his electromagnet, though his goal was to pick up 50 thumb tacks. What could Braddy do to increase the strength of his electromagnet and pick up more thumbtacks?
A) Use fewer coils of wire.
B) Use a screw instead of a nail.
C) Use two batteries instead of one.
D) Replace the nail with a piece of steel.

Answers

In order to increase the strength of his electromagnet and pick up more thumbtacks Braddy should use two batteries instead of one. Using two batteries will increase the amount of current in the coils which will induce a higher electromagnetic field in the nail.
Another option would be to increase the number of coils of wire.

Braddy could use two batteries instead of one. One way he could increase the strength of his magnet is to increase the current and add a second battery. He could also add more coils of wire, not use fewer.

For an atom’s electrons, how many energy sublevels are present in the principal energy level n = 4? 4 9 10 16 32

Answers

I believe the answer is 32.
Hope that helps.

Answer: The number of sub-levels the for the energy level n = 4 are 4.

Explanation:

The number of sub-levels in an energy level is determined from the azimuthal quantum number.

Principle Quantum Number: This quantum number describes the size of the orbital. It is represented by n where n = 1,2,3,4....

Azimuthal Quantum Number: This quantum number describes the shape of the orbital and also determines the sub-levels in an energy level. It is represented by the symbol 'l'. The value of 'l' ranges from 0 to (n-1). For l = 0,1,2,3... the orbitals are s, p, d, f...

For n = 4, the value of l = 0(s), 1(p), 2(d), 3(f) and these are the number of sub-levels.

Hence, the number of sublevels the for the energy level n = 4 are 4.

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