Use the electron configurations and the periodic table to answer the question

Answer:

D

Explanation:

Reason being that if the principal quantum number is 2, the azimuthal quantum number can either be 0 or 1, and in this case it's 0. Since the azimuthal is 0 the magnetic quantum number must definitely be 0, not 1.

Answer:

Easy question to answer, you have the concentration and volume of the base and you have the volume of the acid. You need to find the concentration of the acid. C1V1 = C2V2 equation can be used here

Explanation:

Volume of NaOH = 0.0681 L (change mL into L)

Concentration or Molarity of NaOH = 0.143 mol/L

Volume of HCl = 0.025 L (change mL into L)

Concentration or Molarity of HCl = ???

C1V1 = C2V2

Rearrange equation to find C2

(C1 * V1) / V2 = C2

(0.143 * 0.0681) / (0.025)

C2 = 0.389532

Concentration or Molarity of HCl = 0.389 mol/L

Answer: Normally I would need more info but I believe the answer is -Higher temperature air is less dense.

Explanation:

Took The Same Quiz!

Answer: A liquid takes the shape of its container. Such as a cup with water. It has no definite shape. It has a definite volume.

Answer:

24

Explanation:

the total of any 2 sides must be larger than the 3rd side. x is the 3rd side.

8 + x > 16

x > 8

16 + x > 8

x > -8

8 + 16 > x

24>x

x < 24

the second inequality tells us nothing as sides must be positive.

the third side must be between 8 and 24

Based on atomic properties and structure:

Isotopes are atoms of an element having the same atomic number but different mass numbers.

The difference in mass number is dues to different neutron numbers.

However, because they have the same proton number, they are atoms of the same element.

Neutral atoms contains equal number of protons and electrons.

An atom of barium has 56 protons and 56 neutrons in order to maintain electrical neutrality.

The mass number of an atom is determined by the sum of protons and neutrons.

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The empirical formula of the antimony chloride is SbCl₃

Divide by their molar mass

Sb = 0.338 / 122 = 0.0028

Cl = 0.295 / 35.5 = 0.0083

Divide by the smallest

Sb = 0.0028 / 0.0028 = 1

Cl = 0.0083 / 0.0028 = 3

Thus, the empirical formula of the compound is SbCl₃

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Refer to the attachment

The composition in mol% of the elements are :

Given data :

Weight percentage of copper alloy = 7.7 wt %

Assume weight of alloy = 100 grams

mass of Al₂O₃ in alloy = 7.7 gm

Mass of Cu in alloy = 100 - 7.7 = 92.3 gm

First step : calculate the mole of elements

i) moles of Al₂O₃ in alloy

 = mass of Al₂O₃  in alloy /  Atomic mass of Al₂O₃

 = 7.7 gm  / 102 gm/mol

 = 0.075 mol

ii) moles of Cu in alloy

 = mass of Cu in alloy / Atomic mass of Cu

 = 92.3 gm / 63.5 gm/mol

 = 1.45 mol

Therefore the total number of moles in the alloy = 0.075 + 1.45 = 1.525

Next step : Determine the mole percentages

i) Mole percentage of Al₂O₃ in alloy  

= ( 0.075 ) / 1.525  * 100

= 4.91%

ii) Mole percentage of Cu in alloy

= ( 1.45 ) / 1.525 * 100

= 95.08%

Hence we can conclude that The composition in mol% of the elements are : 4.91%  of Al₂O₃ in alloy and  95.08% of Cu in alloy.

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Taking into account the reaction stoichiometry, 0.1129 moles of P₄ is required to react with with 700.0 grams of calcium phosphate.

In first place, the balanced reaction is:

2 Ca₃(PO₄)₂ + 6 SiO₂ + 10 C → 6 CaSiO₃ + 10 CO + P₄

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

The following rule of three can be applied: If by reaction stoichiometry 620 grams of Ca₃(PO₄)₂ produces 1 mole of P₄, 70 grams of Ca₃(PO₄)₂ produces how many moles of P₄?

[tex]moles of P_{4} =\frac{70 grams of Ca_{3}(PO_{4} )_{2}x1 mole of P_{4} }{620 grams of Ca_{3}(PO_{4} )_{2}}[/tex]

moles of P₄= 0.1129 moles

Finally, 0.1129 moles of P₄ is required to react with with 700.0 grams of calcium phosphate.

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The spontaneity of a reaction depends on the temperature, enthalpy and entropy.

A reaction is said to be spontaneous if it can proceed on its own without a further input of energy.

In the first case, when the enthalpy is less than zero and the entropy is greater than zero, the reaction is spontaneous at all temperatures.

In the second case, when the enthalpy greater than zero and the entropy is greater than zero, the reaction needs to proceed at high temperatures to be spontaneous.

In the third case, when the enthalpy is greater than zero and the entropy is less than zero, the reaction ought to proceed at low temperature in order to be spontaneous.

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Answer:

1.Spontaneous at all temperatures

2. Spontaneous only at high temperatures

3. Non spontaneous at all temperatures

4. Spontaneous only at low temperatures

Explanation:

Just did it on edge

From what we know, we can confirm that people have concerns about the use of slash and burn because it creates more CO2 and decreases the natural ability to remove it from the air.

This has to do with CO2 emissions. The slash and burn technique involves slashing away and burning large areas of green land in order to create farmland. This creates large amounts of CO2 through combustion that are released into the atmosphere. This also removes plants that act as a natural filter for CO2 in the atmosphere, limiting the possibility of a natural recovery.

Therefore, we can confirm that People have concerns about the use of slash and burn because it creates more CO2 and decreases the natural ability to remove it from the air.

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Answer:

cooperate and share ideas between each other and put people with people they know well or work well with.

Explanation:

No action is required. The sailboat should change course and speed.

Answer:

d)A generator converts solar energy into electricity usee to pump water from the sea to the resevoir

A generator converts solar energy into electricity used to pump water from the sea to the reservoir. So, option D is correct.

Solar energy works by transforming solar energy into power. Electricity and heat are the two energy types that the sun produces for human use.

Both are produced using solar panels, which may be found on everything from home rooftops to vast "solar farms" covering acres of rural land.

Solar energy is electrical energy produced directly from sunshine. Solar energy can be utilized to generate electricity or thermal energy. Sustainable Energy We don't use any of the Earth's resources, like coal or oil, when we use solar electricity.

Solar energy is a key energy source in the transition to the creation of clean energy since the sun produces more energy than humans could ever require.

Thus, option D is correct.

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#SPJ2

Boiling point of water is 100 degree Celsius at mean sea level. Boiling point is related to the vapour pressure of the solution. On adding an impurity, the vapor pressure of solution decreases. With an increase in concentration of solute, vapour pressure decreases, hence boiling point increases

Explanation:

tbh I really don't know but

Answer:

there is a gap in the human brain and the skull filled with fluid. woodpecker and bighorn sheep do not have this, so the brain doesn't recoil and hit the skull.

The time taken for the second order reaction is 1494 seconds.

A second order reaction is one in which  a plot of the inverse of the concentration of a reactant versus time is a straight line  and gives the slope of k which is the rate constant.

The formula for a second order reaction is;

1/[A] = kt + 1/[A]o

[A]o = 0.100 M

[A] = 0.100 M - (0.383 × 0.100 M) = 0.0617 M

k = 4.15 x 10^-3

t = ?

t = (0.0617 M)^-1 - ( 0.100 M)^-1/4.15 x 10^-3

t = 16.2 - 10/4.15 x 10^-3

t = 1494 seconds

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Answer:

dasdw

Explanation:

Explanation:

CaCO3 = CaO + CO2

1mol. 1 mol

100. 56

1 ×100. 1 × 56

100. 56

100g of CaCO3 produces 56g of CaO

25.2g of CaCO3 produces x

x = 25.2 ×56

100

x =14.112g of CaO

Answer:

Answer: 2.5 mol O2 are needed to make 5 mol H2O, assuming H2 is in excess.

Explanation:

Answer:

The order of reaction with respect to M, N, and P are 1, 0, and 3, respectively.

The overall order of reaction is 4.

Explanation:

We are given a table containing the concentrations of M, N, P, and the rate of the reaction, and we want to determine the overall order of the reaction and the order with respect to each reactant.

To do so, we can select two experiments from the list where two of the reactant concentrations are held constant and only one changes.

From trials 1 and 2, we can see that holding [N] and [P] constant while doubling [M] doubles the rate.

Therefore, because the rate is directly proportional to M, the reaction is first order with respect to M.

From trials 2 and 3, we can see that holding [M] and [P] constant while doubling [N] does not affect the rate.

Therefore, the reaction is zero order with respect to N.

From trials 1 and 4, we can see that holding [M] and [N] constant and doubling [P] leads to a eight-fold increase (2.6/0.32 ≈ 8).

Therefore, the reaction is third order with respect to P (2³ = 8).

Hence, our rate law is:
[tex]\displaystyle \text{Rate} = k[M]^1[N]^0[P]^3[/tex]

Where the order of reaction with respect to M, N, and P are 1, 0, and 3, respectively.

And the overall order is the sum of each individual reaction orders, or 4.

When sodium hydroxide is dissolved in water within a beaker, it is observed that the beaker becomes warm due to chemical reaction.

A chemical reaction is a type of reaction that involves the rearrangement of atoms to form new substances.

The indications that a chemical reaction has occurred is:

Therefore, When sodium hydroxide is dissolved in water within a beaker, it is observed that the beaker becomes warm due to chemical reaction.

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Answer:

Hey, I hope this helps. You gave the equation already balanced so there was no need to do so, the next thing we need to do after balancing is to split the strong electrolytes into ions. Once that is completed we cross off any reoccurring ions. That leaves us with our complete net ionic.

I also recommend you check out Wayne Breslyn on Yt. He is so helpful with equations like these.