The type of radioactive decay in which the mass number and atomic number remain unchanged is (2 points) Select one: a. beta radiation. b. alpha radiation. c. positron radiation. d. gamma radiation.

Answer: B. (A 25 kg ball)

Explanation:

Since [tex]KE = \frac{1}{2} mv^{2} \\[/tex], and velocity is the same for all four balls, the ball with the greatest mass will have the greatest kinetic energy (since mass and KE are directly related). Below shows these calculations:

A. m = 5

[tex]KE = \frac{1}{2} mv^{2} \\[/tex]

[tex]KE = \frac{1}{2} (5)v^{2} \\[/tex]

[tex]KE = 2.5v^{2} \\[/tex]

B. m = 25

[tex]KE = \frac{1}{2} mv^{2} \\[/tex]

[tex]KE = \frac{1}{2} (25)v^{2} \\[/tex]

[tex]KE = 12.5v^{2} \\[/tex]

C. m = 10

[tex]KE = \frac{1}{2} mv^{2} \\[/tex]

[tex]KE = \frac{1}{2} (10)v^{2} \\[/tex]

[tex]KE = 5v^{2} \\[/tex]

D. m = 1

[tex]KE = \frac{1}{2} mv^{2} \\[/tex]

[tex]KE = \frac{1}{2} (1)v^{2} \\[/tex]

[tex]KE = 0.5v^{2} \\[/tex]

Answer:

mug A has more thermal energy

Explanation:

Explanation:

substitution reaction (also known as single displacement reaction or single substitution reaction) in a chemical reaction during which one functional group in chemical compound is replaced by an other functional group. a good example of a substitution reaction is halogenation .

Answer:

Balance the equation

Fe3O4 + 4H2---> 3Fe +4H2O

Molar mass H2=(2*1)=2g/mol

Mass of H2=54.29grams

mole of H2= 54.29/2=27.15mol

4 mol of H2 = 1 mol Fe3O4

27.15mol of H2= 6.79mol of Fe3O4

Moles of Fe3O4 =6.79mol

Molar mass of Fe3O4= (56×3)+(16×4)

=168+64=232g/mol

Grams of Fe3O4 required to react with 54.29 grams of H2 is 232g/mol× 6.79mol

=1575.28g

Answer:

B

Explanation:

H2 + Cl2 → 2HCl

Hmm redox reaction.

Energy is needed to break the bonds of H-H in H2 and Cl-Cl in Cl2

Answer:

Percent Yield = 91.97%

Explanation:

Aluminum hydroxide Formula: Al(OH)3 Molar mass: 78 g/mol

Stomach acid Formula: HCl Molar mass: 36.46 g/mol

Aluminum Chloride Formula: AlCl₃ Molar mass: 133.34 g/mol

14g Al(OH)3

2Al(OH)3 + Cl2 → 2Al(OH)3Cl

Balanced equation

14/156 = 0.0897 Moles of Al(OH)3

Ratio is 2:1:2 so same ratio for Al(OH)3 to AlCl₃

0.0897 x 266.68 = 23.92grams of AlCl₃

Theoretical yield of aluminum chloride

Actual yield aluminum chloride 22.0 g

Percent yield?

Percent Yield = (actual Yield/Theoretical yield) x 100

Percent Yield = (22/23.92) x 100

Percent Yield = 91.97%

The percent yield of aluminum chloride in the neutralization reaction has been 91.97%.

The balanced reaction for neutralization of stomach acid with aluminum hydroxide has been:

[tex]\rm Al(OH)_3\;+\;3\;HC\l\rightarrow\;AlCl_3\;+\;3\;H_2O[/tex]

The reaction has been determined that 1 mole of aluminum hydroxide forms 1 mole of aluminum chloride. The moles of aluminum hydroxide has been given as:

Moles =  [tex]\rm \dfrac{Mass}{Molecular\;mass}[/tex]

Moles of Aluminum hydroxide = [tex]\rm \dfrac{14}{156}[/tex]

Moles of Aluminum hydroxide = 0.0897 mol.

Thus, the aluminum chloride formed has been:

1 mole Aluminum hydroxide = 1 mole aluminum chloride

0.0897 mole aluminum hydroxide = 0.0897 mole aluminum chloride

The mass of Aluminum chloride formed has been:

0.0897 mole aluminum chloride = [tex]\rm \dfrac{Mass}{266.68}[/tex]

Mass of Aluminum chloride = 0.0897 mol × 266.68 g/mol

Mass of Aluminum chloride = 23.92 grams

The %yield can be given as:

%Yield = [tex]\rm \dfrac{Actual\;yield}{Theoretical\;yield}\;\times\;100[/tex]

The theoretical yield = 23.92 grams

The actual yield = 22 grams

% Yield = [tex]\rm \dfrac{22}{23.92}\;\times\;100[/tex]

% Yield = 91.97%.

The percent yield of aluminum chloride in the neutralization reaction has been 91.97%.

For more information about the neutralization reaction, refer to the link:

https://brainly.com/question/25199574

Answer:

Its b. Magnetic reversal

Explanation:

Answer:

B

Explanation:

i just did it

Answer:

0

Explanation:

Answer

its B

Explanation:

B.

Nuclear energy produces little air pollution.

Answer:

Base

Explanation:

Acid + Base ⇒ Salt + Water (Neutralization Reaction)

So the substances forming salt and water must be acid and base.

Since HCl is acid so the Metal Oxide would be the base.

Answer:

4.38 Grams of C

Explanation:

How many grams of C are required to react with 52.6grams of Fe2O2?

Fe2O2 + C = 2Fe + CO2

Ratio 1:1

Fe2O2 = 144 Molar Mass

Fe2O2 52.6/144 = 0.365Moles of Fe2O2

Fe =56grams/mole =  Charge 2+, 3+

O = 16grams/mole = Charge 2-

C = 12grams/mole = Charge 4+

So Ratio is 1:1 so we only need 0.365Moles of C so 4.38grams

Answer: A) That the total number of atoms in matter will never change.

Explanation: Matter cannot be destroyed nor created. Matter is made up of atoms. The amount of atoms in an object will never change, even when changed into a different form.

Ex. When ice cubes melt there is still the same amount of water just in a different form.

Answer:

A

Explanation:

Answer:

Provided temperature remains constant, the volume and pressure of a gas are  inversely related

Explanation:

Robert Boyle discovered that as long as the temperature of a gas remains constant, the relationship between the volume and the pressure of the gas is inverse. Basically, as the volume of a gas increases, its pressure decreases. As the pressure of the gas increases, its volume decreases.

Boyle's law states relationships among temperature, volume, and pressure are the provided temperature remains constant, and the volume and pressure of a gas are inversely related. The correct option is C.

Robert Boyle gave the Boyle's law. It is also called Boyle–Mariotte law, or Mariotte's law. The law states that at a constant temperature, the volume of the gas increases with the increase in pressure. They are inversely proportional to each other.

The formula of Boyle's law is

P₁V₁=P₂V₂

P₁ = first pressure

P₂ = second pressure

V₁ = first volume

V₂ = second volume

This law tells the relationship between volume and pressure and the temperature of the air.

Thus, the correct option is C. Provided temperature remains constant, the volume, and pressure of a gas are inversely related.

To learn more about Boyle's law, refer to the below link:

https://brainly.com/question/1437490

#SPJ2

Answer:

The new pressure is 3164.58 psi.

Explanation:

We have,

Initial pressure, [tex]P_1= 2975\ psi[/tex]

Initial temperature, [tex]T_1=25^{\circ}=298.15\ K[/tex]

The tank is left in a car in the  hot sun and the temperature increases to 44°C, [tex]T_2=44^{\circ} =317.15\ K[/tex]

Let [tex]P_2[/tex] is the final pressure in the tank. Gay Lussac's law,

[tex]P\propto T\\\\\dfrac{P_1}{P_2}=\dfrac{T_1}{T_2}\\\\P_2=\dfrac{P_1T_2}{T_1}[/tex]

Plugging all the values,

[tex]P_2=\dfrac{2975\times 317.15}{298.15}\\\\P_2=3164.58\ psi[/tex]

So, the new pressure is 3164.58 psi.

Answer:

D

Explanation:

To solve this we must be knowing each and every concept related to  activity series. Therefore, Fe + Cu(NO[tex]_3[/tex])[tex]_2[/tex] reactants will form products. The correct option is option D.

We refer to the metal series in the image above as the activity series. This serves as a guide so that we can identify the byproducts of a metal displacement process. For displacement to take place, a metal must be placed over the other metallic combination.

Ag is significantly lower than Na in the series so, nothing happens. Since Al is above Fe, there is no response. Ni is below Na, hence no reaction will take place. A displacing reaction will happen because Fe is a greater active metal than copper.

Therefore, Fe + Cu(NO[tex]_3[/tex])[tex]_2[/tex] reactants will form products. The correct option is option D.

To know more about activity series, here:

https://brainly.com/question/4406404

#SPJ6

Answer:

[tex]\large \boxed{\text{4.21 mol}}[/tex]

Explanation:

We must do the conversions :

mass of Zn ⟶ moles of Zn ⟶ moles of ZnO

We will need a chemical equation with masses and molar masses, so, let's gather all the information in one place.

Mᵣ:     65.38

              Zn + … ⟶ ZnO  + …

m/g:   275

(a) Moles of Zn

[tex]\text{Moles of Zn} = \text{275 g Zn}\times \dfrac{\text{1 mol Zn}}{\text{65.38 g Zn}} = \text{4.206 mol Zn}[/tex]

(b) Moles of ZnO

The molar ratio is 1 mol ZnO:1 mol Zn

[tex]\text{Moles of ZnO} =\text{4.206 mol Zn} \times \dfrac{\text{1 mol ZnO}}{\text{1 mol Zn}} = \text{4.21 mol ZnO}\\\\\text{The reaction produces $\large \boxed{\textbf{4.21 mol}}$ of ZnO}[/tex]

Answer:

4C5H7ON3S2 + 25O2 —> 20CO2 + 14H2O + 6N2 + 4S2

Explanation:

When C5H7ON3S2 under go Combustion, the following are obtained as illustrated below:

C5H7ON3S2 + O2 —> CO2 + H2O + N2 + S2

Now, let us balance the equation. This is illustrated below:

C5H7ON3S2 + O2 —> CO2 + H2O + N2 + S2

There are 3 atoms of N on the left side and 2 atoms on the right side. It can be balance by putting 4 in front of C5H7ON3S2 and 6 in front of N2 as shown below:

4C5H7ON3S2 + O2 —> CO2 + H2O + 6N2 + S2

There are 20 atoms of C on the left side and 1 atom on the right side. It can be balance by putting 20 in front of CO2 as shown below:

4C5H7ON3S2 + O2 —> 20CO2 + H2O + 6N2 + S2

There are 28 atoms on H on the left side and 2 atoms on the right side. It can be balance by putting 14 in front of H2O as shown below:

4C5H7ON3S2 + O2 —> 20CO2 + 14H2O + 6N2 + S2

There are 8 atoms of S on the left side and 2 atoms on the right side. It can be balance by putting 4 in front of S2 as shown below:

4C5H7ON3S2 + O2 —> 20CO2 + 14H2O + 6N2 + 4S2

Now, there are a total of 54 atoms of O on the right side and 6 atoms on the left side

It can be balance by putting 25 in front of O2 as shown below:

4C5H7ON3S2 + 25O2 —> 20CO2 + 14H2O + 6N2 + 4S2

Now, we can see that the equation is balanced.

Answer:

11 grams

Explanation:

Answer:

d. CH3CH2OH

Explanation:

Molecular solution are solutions when a molecular compound is dissolved in them.

CH3CH2OH represents Ethanol or alcohol carrying "OH" group and is a molecule. CH3CH2OH or Ethanol forms a molecular solution in water.

The equation for Ethanol dissolving in water as follows:

             CH3CH2OH(l) => CH3CH2OH(aq)

CH3CH2OH  srays together as molecules. During dissolving, ethanol molecule fit into spaces between water molecules and completely mix with water.

While HCN, CH3COOH and Ba(OH)2 form ionic solution.

Hence, the correct option is d. CH3CH2OH.

Answer:

A source of electricity, a wire coil, and an iron core  

Explanation:

An electromagnet has three critical components:

1. A source of electricity

This is often a battery.

It generates the electric current that produces the magnetic field.  

2. A wire coil

The wire carries the electric current.

Stacking the wire into loops makes a stronger magnetic field.

The more loops in the coil, the stronger the field.

3. An iron core

An iron core greatly increases the strength of the magnetic field within it and at its ends.

Answer:

A. 1:3

Explanation:

If we look at the ions shown in the image attached to the question, we will notice that we have aluminum (Al^3+), a trivalent ion combining with the iodide ion (I^-).

Aluminum can easily give out its three outermost electrons to three atoms of iodine. If aluminum gives out its three electrons, it achieves the stable octet structure. Iodine atoms have seven electrons in their outermost shell. They only need one more electrons to complete their octet. This one electron can be gotten by the combination of three iodine atoms with one atom of aluminum. One electron each is transferred from the aluminum atom to each iodine atom to form AlI3 with a ratio of 1:3.

Lewis dot structure is a diagrammatic representation of valence electrons in an atom of a molecule.

The ratio of the cations to anions in the given compound is 1:3.

In the given figure, Aluminum has 3 electrons, which can be donated to iodine. Aluminum has atomic number 13, this means that if the element donates three electrons then it will attain a stable electronic configuration.

In the Iodine atom, each iodine needs only one electron to complete its octet. Thus, three atoms of iodine will be required to gain electrons from aluminum.

Thus, the ratio cation to the anion is 1:3.

To know more about lewis dot structure, refer to the following link:

https://brainly.com/question/4144781

Answer:

Energy, [tex]E=5.3\times 10^{-21}\ J[/tex]

Explanation:

It is required to find the energy of an electromagnetic wave with a frequency of [tex]8\times 10^{12}\ Hz[/tex]. The energy of a wave in terms of its frequency is given by :

[tex]E=h\nu[/tex]

[tex]\nu[/tex] = frequency of em wave

[tex]E=6.63\times 10^{-34}\times 8\times 10^{12}\\\\E=5.3\times 10^{-21}\ J[/tex]

So, the energy of an electromagnetic wave is [tex]5.3\times 10^{-21}\ J[/tex]

Answer:

D. [tex]5.3 * 10^-21 J[/tex]

Answer:

B

Explanation:

If you remeber a balloon in hot air, it pops. This is because the molecules are moving too fast and need more space to move, thus popping the balloon. If you put a balloon in cold air, then it shrinks, the molecules not moving fast enough and don't need as much space.

Answer: Four carbon dioxide molecules and four water molecules

Explanation:

Answer:

D: four carbon dioxide molecules and two water molecules

Explanation:

There are four carbon dioxide molecules (CO₂) on the right side of chemical reaction, because there are four carbon atoms on the left side of balanced chemical reaction.

There are four water molecules (H₂O) on the right side of chemical reaction, because there are eight hydrogen atoms on the left side of balanced chemical reaction.

C) Test her suspicion by going to see an allergist to diagnose the allergy.

It's right

Answer:

Tue answer is B - C4H1102

The chemical formula for the molecule modeled is C₆H₁₂O₂. Therefore, option C is correct.

The term chemical formula is defined as the elements that form the compound and the numbers of atoms of each element in the smallest unit of that compound. Water is consist of hydrogen and oxygen in a 2:1 ratio. The chemical formula for water is H₂O.

There are 3 main types of chemical formulas that are empirical formula, molecular formula and structural formula.

Empirical formulas represent the simplest whole-number ratio of atoms in a compound, molecular formulas represent the number of each type of atom in a molecule, and structural formulas represent how the atoms in a molecule are bonded to each other.

In a given molecule modeled C₆H₁₂O₂ we see that, there are six atoms of carbon, 12 atoms of hydrogen and 2 atoms of oxygen.

Thus, option C is correct.

To learn more about the chemical formula, follow the link;

https://brainly.com/question/11995171

#SPJ2