Question 12
How many moles of aluminum phosphate are produced when 6.8 moles of aluminum nitrate
reacts?

Answer:

Light and sound both are waves, but sound requires a material medium to travel, and hence cannot travel in empty space while light can travel through vacuum but not through opaque materials. Both undergo refraction, diffraction and interference.

Explanation:

[tex]M_{A}V_{A}=M_{B}V_{B}\\(80.0)(4.00)=V_{B}(12.4)\\V_{B}=\frac{(80.0)(4.00)}{12.4} \approx \boxed{25.8 \text{ mL}}[/tex]

Answer: burning and digesting

Both of these are chemical changes.

Answer:

burning and digesting

Explanation:

The molarity of the solution given the data from the question is 0.0135 M

Molarity is simply defined as the mole of solute per unit litre of solution. Mathematically, it can be expressed as:

Molarity = mole / Volume

Mole = mass / molar mass

Mole of MgSO₄ = 1.78 / 120.4

Mole of MgSO₄ = 0.0148 mole

Molarity = mole / Volume

Molarity = 0.0148 / 1.1

Molarity = 0.0135 M

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Answer:

5095

Explanation:

Answer:

the first pups are very similar in color so i would assume that the mom and dad are some color and breed, rather the second example would be a white and black dog with possible other colors between black and white

Explanation:

Answer:

Combination of all the wavelengths of visible light.

Explanation:

Hope it helps you :))))

Have a good day

Answer:

chemical formula of isopropyl alcohol can also be written as: C3H7OH, CH3CHOHCH3 or (CH3)2CHOH.

chemical formula of ethanoic acid is CH₃COOH.

Answer:

2 CuCl₂ (aq) + Sn(NO₂)₄ (aq) ---> 2 Cu(NO₂)₂ (aq) + SnCl₄ (aq)

Explanation:

You can safely assume that this is a double-displacement reaction. In these reactions, the cation of one molecule is substituted for the cation of another molecule, and vice versa. Once the reaction occurs, you are left with the products:

copper (II) chloride + tin (IV) nitrite ---> copper (II) nitrite + tin (IV) chloride

The balanced equation is:

2 CuCl₂ (aq) + Sn(NO₂)₄ (aq) ---> 2 Cu(NO₂)₂ (aq) + SnCl₄ (aq)

Atomic radii decreases in a Period, but increase down a Group.

Atomic Radii is the total distance from the nucleus of an atom to the outermost shell of its electron. Atomic radii decreases when we move from left to right in a Period due to addition of nuclear charge inside the nucleus but increase down a Group because of the addition of new shells

So we can conclude that Atomic radii decreases in a Period, but increase down a Group.

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Answer:

P = 29,523 kPa

Explanation:

The formula of the Ideal Gas Law is:

PV = nRT

In this formula,

P = pressure (kPa)

V = volume (L)

n = number of moles

R = 8.314 (L*pKa/mol*K)

T = temperature (K)

You have been given values for all of the variables but pressure. Therefore, you can plug the given values into the equation and simplify to find pressure.

PV = nRT

P(1 L) = (13 moles)(8.314 L*kPa/mol*K)(273.15 K)

P(1 L) = 29523

P = 29,523 kPa

**I am pretty certain my math is correct. I also checked with an ideal gas law calculator and got this same answer. Either I am missing something or some of the values are wrong. Hopefully this explanation helps clear something up though.**

Answer: B. [tex]\text{CH}_{3}\text{COO}^{+}[/tex]

Explanation:

To find the conjugate base, you add a hydrogen ion and add 1 to the overall charge.

CH[tex]_3[/tex]COO⁻ is the conjugate base of  CH[tex]_3[/tex]COOH in the given reaction. Therefore, the correct option is option B.

Conjugate acids and bases are ideas included in the Bronsted-Lowry acid-base theory. An acid losses a hydrogen ion as it splits into its electrons in water. The conjugate base of the acid is the species that results.

A conjugate base comprises the base participant, X-, of two compounds that convert into one another by acquiring or losing a proton, according to a more comprehensive definition. In a chemical process, the conjugate base has the capacity to either gain and absorb a proton. The proton and hydrogen is given away in the process by the conjugate acid. CH[tex]_3[/tex]COO⁻ is the conjugate base of  CH[tex]_3[/tex]COOH in the given reaction.

Therefore, the correct option is option B.

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To give 33.6 dm³ hydrogen gas at STP, 18.06 x 10²³ atoms of Na must react completely.

A mole is a unit of measurement used to measure the amount of any fundamental entity (atoms, molecules, ions) present in the substance.

As according to the given equation, 2 moles (ie 12.04 x 10²³ atoms) of Na-atoms produces 1 mole (22.4 ltr) of H₂-gas.

Hence, to produce 33.6 ltr (equivalent to 33.6 dm³) of H₂-gas produced by ;

   = 12.04 x 10²³ atoms of Na / 22.4 ltr of H₂-gas x 33.6 ltr

   = 18.06 x 10²³ atoms of Na

Hence, To give 33.6 dm³ hydrogen gas at STP, 18.06 x 10²³ atoms of Na must react completely.

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Answer:

Avogadro's number or Avogardro’s constant

Explanation:

I’m pretty sure this is correct if it’s not I’m sorry lol.

The factors that affect the strength of electric or magnetic fields are loop count, the current, the wire size, and the presence of an iron core.

Electromagnetic field is defined as the field that is made up of both the electric and magnetic field that can help in conduction of electricity.

The factors that affect the strength of electric or magnetic fields include the following:

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Storms are disturbances in atmospheric conditions. The four severe storms are thunderstorms, lightning, heavy rain, and blizzards.

Blizzards are the type of storm that includes high wind at 40 km/h and also have snow and cold air that makes the temperature drop and causes poor visibility.

Thunderstorms and lightning occur with high electrical charge release during high wind and rain. Heavy rains are severe types of storms as they can cause a flood.

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Answer:

C.) trigonal pyramidal, polar

Explanation:

Around the phosphorus central atom, there are 3 fluorine atoms and 1 lone pair. This makes the shape tetrahedral, but gives it a trigonal pyramidal geometry. The lone pair on the phosphorus disrupts the balance of the molecule and pulls the electrons towards it. This makes the molecule polar.

0.1 mL of the stock solution of the enzyme is taken and made up to 5.0 mL with 0.001M HCl in order to prepare a 50-fold diluted enzyme.

Dilution is a process of making a solution of lower concentration from a solution of higher concentration by the addition of solvent to a given volume of the solution of higher concentration.

Dilution of solutions is done using the dilution formula in order to determine the given volume of diluent or stock solution required. The dilution formula is given below:

where:

For the enzyme dilution;

C1 = 1 mg/mL

C2 = 1/50 mg/ml = 0.02 mg/ml

V= ?

V2 = 5 ml

V1 = C2V2/C1

V1 =  0.02 * 5/1 = 0.1 mL

Therefore, 0.1 mL of the stock solution of the enzyme is taken and made up to 5.0 mL with 0.001M HCl in order to prepare a 50-fold diluted enzyme.

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2.99 °C is the change in temperature if a 40 g sample of water absorbs 500 calories of energy.

The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases 1 K (or 1 °C), and its units are J/(kg K) or J/(kg °C).

Given data:

m = 40 g

Q = 500 J

Specific heat capacity of water = 4.18 J/g°C

Change in Temperature =?

The formula for Heat Energy is given by:

Q = mcp∆T

where: Q - Heat Energy

m - mass

cp - specific heat

∆T = change in temperature, [tex]T_2 - T_1[/tex]

Solution:

Substituting the value of m, specific heat capacity of water and Q in the formula,

500 J = (40 g)(4.18 J/g°C)(∆T)

∆T = 2.99 °C

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Answer:

B.

People in the US use more resources per person than people in less developed countries

Explanation:

The reaction NO₂(g) + H₂O(l) 4 NO(g) + 2HNO3(aq) is not a Decomposition Reaction , Option E is the correct answer.

A reaction in which a substance break down into two or more substances is called a Decomposition Reaction.

In the given question

the reactions

CuSO4.5H₂O(s)--> CuSO4(s) + 5H₂O(g).

2PbO₂ (s) --> 2PbO(s) + O₂(g).

Fe(CO)(I)-->Fe(s) + 5CO(g).

H₂SO3(aq)-- >SO₂(g) + H₂O(l)

These are all Decomposition Reaction.

The only reaction which is not is the Reaction E

NO₂(g) + H₂O(l) 4 NO(g) + 2HNO3(aq)

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Answer:

1.natural 2.weathering 3.soil

Answer:

dust form

Explanation:

because dust spreads alot faster

[tex]NADP{{H}_{2}}[/tex] is required for the transformation of oxaloacetic acid into malic acid.

Malic acid is sour and acidic. This helps to clear away dead skin cells when applied to the skin.

The conversion of oxaloacetic acid into malic acid takes place in [tex]C_4[/tex]plants through the [tex]C_4[/tex] cycle by the process of photosynthesis.

Carboxylation of pyruvate produces oxaloacetate (OAA). This is an energy-requiring reaction that uses adenosine triphosphate (ATP).

Hence, [tex]NADP{{H}_{2}}[/tex] is required for the transformation of oxaloacetic acid into malic acid.

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Answer:

don't know mass? or energy just search

Explanation:

1 moles Lead(II) Acetate to grams = 325.28804 grams

3.47 moles Lead(II) Acetate to grams = 325.28804 ×3.47 grams=1128.749 grams

1 moles sodium chloride to grams=58.5 grams

3.47 moles sodium chloride to grams=58.5×3.47 grams

=202.995 grams

Answer:

It is the proportion of atoms of an isotope in a sample of an element taken from the natural world.

Explanation:

The number of atoms present in 0.58 mole of magnesium, Mg is 3.49×10²³ atoms

1 mole of Mg = 6.02×10²³ atoms

1 mole of Mg = 6.02×10²³ atoms

Therefore,

0.58 mole of Mg = 0.58 × 6.02×10²³

0.58 mole of Mg = 3.49×10²³ atoms

Thus, 3.49×10²³ atoms are present in 0.58 mole of Mg

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A piece of copper that has a mass of 290 g has 2.748 *10²⁴ molecules.

A mole is a unit of measurement which relates the molar mass to the amount of the number of atoms and molecules .

1 mole = 6.022 *10²³ molecules or atoms

Molecular weight of copper = 63.55

290 g of Copper = 290/63.55 = 4.56 moles

1 mole has 6.022 *10²³ molecules or atoms

4.56  mole has 4.56 *6.022*10²³ molecules or atoms

= 2.748 *10²⁴ molecules.

A piece of copper that has a mass of 290 g has 2.748 *10²⁴ molecules.

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From the calculations, we can see that the half life of the material is 11.4 days

The term radioactivity refers to the spontaneous disintegration of a radioactive nucleus. The time taken for half of the radioactive material to remain.

Given that;

N/No = (1/2)^t/t1/2

N = amount that remained

No = amount that remained in the beginning

t = time taken

t1/2 = half life of the substance

N =Noe^-kt

4.995 ×10^9 = 1.75 x 10^12e^-55k

3.5* 10-2=e^-55k

k = ln3.5* 10-2/-55

k =0.06095

t1/2 = 0.693/0.06095

t1/2 = 11.4 days

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Answer:

194.73 K

Explanation:

Use the Ideal Gas Law:    PV = n RT

   R = .082057366  L Atm / k-mole

2 moles Argon weigh in at 79.896 gm

  79.896 gm / 5 gm/L = 15.9792 Liters

Ideal Gas Law:

(2)(15.9792) = 2 (.082057366) ( K)

194.73 K

Considering 2.00 moles of Argon, an ideal gas, at a density of 5.00 g/L and a pressure of 2.00 atm, the closest value to the temperature of the gas is approximately 39.01 K.

To find the temperature of the gas, we can use the ideal gas law equation:

PV = nRT

In this formula:

P = pressure (in atm)

V = volume (in L)

n = number of moles

R = ideal gas constant (0.0821 L·atm/mol·K)

T = temperature (in K)

Here it is given that:

P = 2.00 atm

V = 1 L

n = 2.00 moles

R = 0.0821 L·atm/mol·K

Now we can rearrange the equation to solve for T:

T = PV / (nR)

Substitute the given values:

T = (2.00 atm) x (16.00 L) ÷ (2.00 moles x 0.0821 L·atm/mol·K)

Calculate:

T ≈ 39.01 K

Thus, the closest value to the temperature of the gas is approximately 39.01 K.

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