Determine the molar mass of (show your work) :

FeCl3•6H2O (note, this is all 1 molecule. Its an FeCl3 with a cage of 6H2O’s attached. These molecules are known as hydrates.)

Ca3(PO4)2

Answer:

404.47692 g

Explanation:

Na₂CO₃ + Ca(NO₃)₂ ⇒ CaCO₃ + 2NaNO₃

From the coefficients in the balanced chemical equation, we see that the ratio of Ca(NO₃)₂ and 2NaNO₃ is 1:2, so every 1 mol of Ca(NO₃)₂ produces 2 mols of 2NaNO₃.

(4.93 mol NaNO₃)([tex]\frac{Ca(NO3)2}{2NaNO3}[/tex]) = 2.465 mol Ca(NO₃)₂

Then, we need to convert from moles to grams, since we are asked to find the mass of Ca(NO₃)₂. To do this, we need to look up the molar mass of Ca(NO₃)₂, which is 164.088 g/mol.

(2.465 mol Ca(NO₃)₂ ) (  [tex]\frac{164.088 g}{1 mol}[/tex]) =  404.47692 g

Thus,  404.47692 grams of Ca(NO₃)₂ is needed to produce 4.93 mol of 2NaNO₃.

Answer:

Rounding for significant figures gives us a final answer of 3.41×1022 atoms 3.41 × 10 22 a t o m s atoms of oxygen.

The oxygen atoms in 4.00 g of quartz is 8.4 x 10²² atoms of oxygen.

Atoms are defined as a smallest unit into which matter can be divided without the release of electrically charged particles.

It can also be defined as a building block of matter and were created after big bang theory.

The amount of mole of SiO₂ in 4.00 grams

= 4.00 / 60 = 0.07 moles

As 2 atoms of oxygen atoms are present in quartz formula, the number of mole of O₂ in this formula

= 2 x 0.07 = 0.14 mole

So, the amount of O₂ in 4.00 g of quartz

= 6.02 x 10²³ x 0.14

= 8.4 x 10²² atoms of oxygen.

Thus, the oxygen atoms in 4.00 g of quartz is 8.4 x 10²² atoms of oxygen.

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A 12.1 M HCl solution with a density of 1.19 g/mL has a molality of 16.1 m.

Molality is defined as the total moles of a solute contained in a kilogram of a solvent.

Let's suppose we have 1 L of the solution.

The solution is 12.1 M, that is, there are 12.1 moles of HCl in 1 L of solution.

The molar mass of HCl is 36.465 g/mol.

12.1 mol × 36.465 g/mol = 441 g

The density of the solution is 1.19 g/mL.

1000 mL × 1.19 g/mL = 1190 g

In 1190 g of solution, there are 441 g of HCl.

mWater = 1190 g - 441 g = 749 g = 0.749 kg

b = 12.1 mol / 0.749 kg = 16.1 m

A 12.1 M HCl solution with a density of 1.19 g/mL has a molality of 16.1 m.

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Answer:

2.765 × × 10³ moles of O₂

Explanation:

The chemical equation to produce water from oxygen and hydrogen is;

2H₂ (g) + O₂ (g) = 2H₂O (l)

From the equation above, we see that;

2 moles of H₂O is produced from 1 mole of O₂

Thus; 5.53 × 10³ moles of H₂O  will require;

(5.53 x 10³ moles of H₂O × 1 mole of O₂)/2 moles of H₂O = 2.765 × × 10³ moles of O₂

Answer:

Solve algebraically by setting the y equal to 0.892 = 0.355x + 0.058. Then subtract the 0.058 over then follow by dividing by 0.355. You will then get the x value equal to your concentration. The answer is 2.676.

Hope this helps!

Explanation:

[tex]\bold{\huge{\orange{\underline{ Solution}}}}[/tex]

[tex]\bold{\underline{ Given :- }}[/tex]

[tex]\bold{\underline{ To \: Find :- }}[/tex]

[tex]\bold{\underline{ Let's \:Begin:- }}[/tex]

We know that,

Amount of heat energy = mass * specific heat * change in temperature

That is,

[tex]\sf{\red{ Q = mcΔT }}[/tex]

Subsitute the required values in the above formula :-

[tex]\sf{ Q = 250 × 4.180 ×(0 - 100 )}[/tex]

[tex]\sf{ Q = 250 × 4.180 × - 100 }[/tex]

[tex]\sf{ Q = 250 × - 418}[/tex]

[tex]\sf{\pink{ Q = - 104,500 J }}[/tex]

Hence, 104,500 J of heat is released to cool 250 grams of liquid water from 100° C to 0° C.

[tex]\bold{\underline{ Now :- }}[/tex]

We have to tell whether the above process is endothermic or exothermic :-

Here, In the above process ΔT is negative and as a result of it Q is also negative that means above process is Exothermic

Answer:

farther apart; increasing

Explanation:

The particles in a liquid are less tightly packed together so an increase in pressure makes the particles in a liquid get farther apart.

Answer:

The two main types of nucleic acids are DNA and RNA. Both DNA and RNA are made from nucleotides, each containing a five-carbon sugar backbone, a phosphate group, and a nitrogen base. DNA provides the code for the cell's activities, while RNA converts that code into proteins to carry out cellular functions.

Explanation:

Answer: Think and you will get it right!

Explanation:

To find the mass percent composition of an element, divide the mass contribution of the element by the total molecular mass. This number must then be multiplied by 100% to be expressed as a percent.

The pressure of the gas is expected to increase in accordance to Boyle's law.

Boyle's law states that, the volume of a given mass of gas is inversely proportional to its pressure at constant temperature.

By implication, when the piston is lowered and the volume of the gas is decreased, the pressure of the gas is expected to increase in accordance to Boyle's law.

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The atomic greatest radius is magnisium

A solution has an absorbance of 0.2 with a path length of 1 cm. Given the molar absorptivity coefficient is 59 cm⁻¹ M⁻¹, the molarity is 0.003 M.

The Beer-Lambert law states that for a given material sample, path length and concentration of the sample are directly proportional to the absorbance of the light.

A solution has an absorbance of 0.2 with a path length of 1 cm. Given the molar absorptivity coefficient is 59 cm⁻¹ M⁻¹, we can calculate the molarity of the solution using the following expression.

A = ε × b × c

c = A / ε × b

c = 0.2 / (59 cm⁻¹ M⁻¹) × 1 cm = 0.003 M

where,

A solution has an absorbance of 0.2 with a path length of 1 cm. Given the molar absorptivity coefficient is 59 cm⁻¹ M⁻¹, the molarity is 0.003 M.

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Answer:

j=my 21.67-2x

Explanation:

under stand please mark me the brainliest

Answer: 5.47177

For every Mile there is 1.60934 Kilometers

so we take 3.4 and multiply it by 1.60934

3.4 x 1.60934

= 5.47177 Km

Answer:

( essay ) a time when i got lost somewhere

Answer:

c

Explanation:

edge 2022

Answer:

mass of water: 8.9 g

Explanation:

Hey there its simple:

mass of water: mass of cylinder with water filled - mass of empty cylinder

mass of water: 32 g - 23.1 g

mass of water: 8.9 g

Answer:

i got 6

Explanation:

Because 14 feet divide by 20.5 gives you 0.6

so it 0.6 times 10 =6

Answer:

140 square feet

Explanation:

Given the following question:

Room is 14 feet wide = the width
20.5 feet long = the length
10-foot ceilings = the height

Area = Width × Height

[tex]A=10\times14=140[/tex]
[tex]A=140 ft^2[/tex]

The area of the room is "140 square feet."

Hope this helps.

AnswerAnswer:

Explanation:The Answer is Option A

Answer:

The maximum number of valence electrons is 8

Explanation:

element 3 has 3 valence electrons. 7 has 5, and 10 has 8, as we increased the number of electrons in element 11, the number of valence electrons became 3, and the pattern went on, it cannot exceed 8.

The electron configuration of an atom depicts the arrangement of electrons scattered throughout the orbital shells and subshells.

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Answer:

Filtration is the process of separating solids from liquids using filter paper. The process can be used to separate an insoluble solid, for example, stone or sand grains from a liquid. The liquid could be a pure liquid, for example, water, or it could be a solution, for example, salty water.

Explanation:

Answer:

solids for liquids

Explanation:

The process can be used to separate an insoluble solid, for example stone or sand grains from a liquid.

C to D

Explanation:

it rises faster between those two points

The atom that has the smallest diameter will have the greatest electron attraction, so the electrons will be difficult to escape

So atom R will lose its electron most reluctantly

Answer:

Enzymes are biological catalysts. Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy.

Answer: Enzymes are catalysts which will lower the activation energy of a chemical reaction. Activation energy is the energy needed to get a reaction going. By lowering the amount of energy needed to start a reaction, the reaction can go more quickly.

Orbital diagrams are diagrammatic representations of the arrangement of electrons in an atom.

Orbital diagrams are diagrammatic representations of the arrangement of electrons in an atom. The element Tantalum is a transition element of the third row.

1) When three chloride ions attach to Ta^2+, the three 5d orbitals are involved.

2) When Ta^2+ bonds to a singlet carbene, the 6s orbital is used.

3)When Ta^2+ is bonded to a triplet carbene, the outer 6p orbitals

4) When Ta^2+ is bonded to ethene the outer 6p orbitals.

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Answer:

Increase

Increase

Explanation:

By increasing the activation energy (Ea) the rate constant decreases and by increasing the temperature (T) the rate constant increases.

The rate constant is also known as specific rate constant is a proportionality factor between rate of reaction and concentration.

[tex]k = Ae^{-\frac{Ea}{RT}}[/tex]

Where,

k = Chemical reaction rate

A = Pre-exponential Factor

Ea = Activation energy

R = Gas constant

T = Temperature

Now, check whether the following change increases or decreases the rate constant.

Increasing Ea

According to the Arrhenius Equation the higher the activation energy, the slower the reaction. Rate constant increases exponentially with decreasing Ea and increasing T.  So by increasing activation energy (Ea) decreases the rate.

Increasing T

The rate constant increases with increase in temperature. increasing the T of a reaction increases the rate because the rate constant increases a/q to the Arrhenius Equation. So by increasing the temperature increases the rate.

Thus, we can conclude that by increasing the activation energy (Ea) the rate constant decreases and by increasing the temperature (T) the rate constant increases.

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Answer:

what you've asked so I guess the answer will be 10 days