What is the electron configuration for Cl? orbital notation for Cl?

3 Ca3 (PO4)2 + 4 CaO

So we can see that there are 3 Ca3 (Ca3, Ca3, Ca3), which means you multiply the subscript by the coefficient, meaning 9 Ca. Then we see (PO4)2, which means that there are two PO4 (PO4, PO4) so we multiply the subscript 2 by the subscript 4 on O to equal 8 O, and we multiply the subscript 2 by the subscript 1 on P (the 1 is not written) to equal 2 P.

So far we have 9 Ca, 8 O, and 2 P.

One last term, 4 CaO (means CaO, CaO, CaO, CaO) which translates to 4 Ca and 4 O.

Add them all together and you get (9+4=13) 13 Ca, (8+4=12) 12 O, and 2 P

Answer:

Explanation:

16. 12

17. 8

18. 9

19. 10

20. 5

21. 15

22.8

23. 24

24. 12

25. 3 i guess( some one comment for 25th pls)

26. 2

Answer: The molarity of [tex]Ba(OH)_2[/tex] is 0.07 M

Explanation:

According to the neutralization law,

[tex]n_1M_1V_1=n_2M_2V_2[/tex]

where,

[tex]n_1[/tex] = basicity [tex]HCl[/tex] = 1

[tex]M_1[/tex] = molarity of [tex]HCl[/tex] solution = 0.1 M

[tex]V_1[/tex] = volume of  [tex]HCl[/tex] solution = 35 ml

[tex]n_2[/tex] = acidity of [tex]Ba(OH)_2[/tex] = 2

[tex]M_2[/tex] = molarity of [tex]Ba(OH)_2[/tex] solution = ?

[tex]V_2[/tex] = volume of  [tex]Ba(OH)_2[/tex] solution = 25 ml

Putting in the values we get:

[tex]1\times 0.1\times 35=2\times M_2\times 25[/tex]

[tex]M_2=0.07[/tex]

Therefore, molarity of [tex]Ba(OH)_2[/tex] is 0.07 M

Answer:

Light bulb gives light energy which is usefull

Answer:

(c) light energy

Explanation:

As bulb is used for giving light and hence the energy that it gives is light energy.

Answer:

c

Explanation:

but I'm not 100 percent sure.

Answer:

purifying copper to produce copper wiring for homes

Explanation:

Answer:

b.purifying copper to produce copper wiring for homes

Explanation:

Answer:

Oil spills

Explanation:

I've done it before

Answer:

mole=mass/molarmass

Explanation:

molar mass of h2o=18

Answer:

Explanation:

The Colosseum was basically an amphitheatre. It was a stage area where the public can see entertainment and concerts. The public also viewed executions of people who committed very bad crimes. The answer to the question is It was used to provide entertainment for the public.

ANWSER:It was used to provide entertainment for the public.

it is righit i made sure i di test got 100%d

Answer:

29     and      18

Explanation:

Answer:

11

Explanation:

5×10-21 = 29

4×10-22 = 18

29 - 18 = 11

Answer:

2C2H6 + 7O2 --> 4CO2 + 6H20

Explanation:

Balanced equation

Robert Boyle established chemistry as a discipline based on measurement, freeing it from the mysticism and alchemy that had plagued it. He introduced the concept of chemical analysis and defined elements, compounds, and mixes.

Boyle used a vacuum chamber to alter the gas's pressure in order to find the link between pressure and volume in a gas, which is now known as Boyle's law. In order to demonstrate that pressure and volume are inversely related to one another, he made detailed observations and carried out a number of experiments.

He developed a new vacuum pump and performed experiments in vacuum, they found that neither sound nor flame could exist there.

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Answer:

7.56°C is the temperature when the gas occupies 400cm³

Explanation:

Based on Charles's law, the volume of a gas is directly proportional to its absolute temperature under constant pressure. The equation is:

V₁T₂ = V₂T₁

Where V is volume and T is absolute temperature of 1, initial state and 2, final state of the gas.

Computing the values:

V₁ = 560cm³

T₂ = ?

V₂ = 400cm³

T₁ = 120°C + 273.15 = 393.15K

560cm³*T₂ = 400cm³*393.15K

T₂ = 280.71K - 273.15 =

Answer:

Ionic bond

Explanation:

Covalent bonds can only form between non-metals and copper is a metal so it would be an ionic bond.

CuO (copper(II) oxide) is a compound with a covalent bond. The electronegativity difference is less than 1.7, which would make it a covalent bond.

In a covalent bond, atoms share electrons to form a stable molecule. The electronegativity difference between copper (Cu) and oxygen (O) is less than 1.7, indicating a nonpolar covalent bond. This means that the electrons in the bond are shared relatively equally between the copper and oxygen atoms, resulting in a molecule with a low degree of polarity.

Copper is a transition metal with an electronegativity of around 1.9, and oxygen has an electronegativity of approximately 3.44. The electronegativity difference (3.44 - 1.9 = 1.54) is less than 1.7, confirming that the bond between copper and oxygen is covalent rather than ionic.

In ionic bonds, the electronegativity difference is typically larger than 1.7, leading to a transfer of electrons from one atom to another, resulting in the formation of ions. Since the electronegativity difference in CuO is less than 1.7, it is considered a covalent bond.

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Answer:

H 2 O

Explanation:

H 2 O can act as a Brønsted-Lowry acid by donating a proton to produce its conjugate base OH - (known as the hydroxide ion). H 2 O can act as a Brønsted-Lowry base by accepting a proton to produce its conjugate acid H 3 O + (known as the oxidanium ion, or oxonium ion, or, in older textbooks as the hydronium ion (5)).

Answer:

0.179kg/m3 hope that helps you out

Answer: Chemical

Explanation:

Answer:

Ah I think it's Chemical

Explanation:

Maybe, because it wasn't just move onto something, it changed it.

Answer:

The moon is closer to earth

Explanation:

Around each new moon and full moon, the sun, Earth, and moon arrange themselves more or less along a line in space. Then the pull on the tides increases, because the gravity of the sun reinforces the moon's gravity. ... Thus, at new moon or full moon, the tide's range is at its maximum.

Answer:

Percentage yield of MgCl₂ = 83.4%

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

Mg + 2HCl —> MgCl₂ + H₂

Next we shall determine the mass of of Mg that reacted and the mass of MgCl₂ produced from the balanced equation. This can be obtained as follow:

Molar mass of Mg = 24 g/mol

Mass of Mg from the balanced equation = 1 × 24 = 24 g

Molar mass of MgCl₂ = 24 + (35.5×2)

= 24 + 71

= 95 g/mol

Mass of MgCl₂ from the balanced equation = 1 × 95 = 95 g

SUMMARY:

From the balanced equation above,

24 g of Mg reacted to produce 95 g of MgCl₂.

Next, we shall determine the theoretical yield of MgCl₂. This can be obtained as follow:

From the balanced equation above,

24 g of Mg reacted to produce 95 g of MgCl₂.

Therefore, 100 g of Mg will react to produce = (100 × 95)/24 = 395.83 g of MgCl₂.

Thus, the theoretical yield of MgCl₂ is 395.83 g

Finally, we shall determine the percentage yield of MgCl₂. This can be obtained as follow:

Actual yield of MgCl₂ = 330 g

Theoretical yield of MgCl₂ = 395.83 g

Percentage yield of MgCl₂ =?

Percentage yield = Actual yield /Theoretical yield × 100

Percentage yield = 330 / 395.83 × 100

Percentage yield of MgCl₂ = 83.4%

Answer:

C

Explanation:

The answer is C because only that amount can move

Answer:

false

Explanation:

This statement is false because plants release waste material, like oxygen, through small holes in the plants leaves.

Answer:

B

Explanation:

Trust me I've had problems like these

Answer:

the popilation of mice will increase, since the fox was their only predator. and the population of snakes will decrease. since the fox was its only food source.

(hope this helps)

Air pollution must affect lichen growth because lichens have no roots they get all their nutrients from the air. If the air has pollutants that can become toxic for lichens.

A lichen can be described as a composite organism that arises from algae or cyanobacteria living among filaments of fungi species in a mutualistic relationship. Lichens have different properties that come in many colors, sizes, and forms.

A macro lichen can be defined as a lichen that is either bush-like or leafy.  Lichens do not have roots therefore they absorb water and nutrients as plants do  but like plants, they form their own nutrition by photosynthesis.

If lichens are exposed to air pollutants they are unable to avoid the accumulation of air pollutants. Because lichens possess no roots, their primary source of most nutrients is the air.

Lichen decline can be because of the accumulation of toxic substances as well as altered nutrient supplies that favor one symbiont over the other. Therefore, option (A) is correct.

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Answer:

2

Explanation:

Ed. 2020

Answer:

Do you need 3 ways or just one?

1. Temperature.

2. Pressure.

3. Polarity.

Explanation:

Eh hope these help, Idr understand the question but those are 3 ways to increase the solubility of a solid in water.

Answer:

Solid, Naturally Occurring, Inorganic, Fixed Composition, Crystal-like internal structure

Explanation: