Describe how calcium and fluorine bond together to form calcium fluoride

Answer:

5.96 g/cm^3

Explanation:

Corner atom = 1/8

Atoms in center = 1

Atoms in face of the cube= 1/2  

Molar mass of V = 50.94 g/mol (from period table)

1 mole = 6.02x10^23

In BCC unit cell:

(8 x 1/8)+ 1=2 per 1 unit cell

Mass: 2(50.94g)/6.02x10^23 = 1.69x10^-22 g/unit cell

305pm=(305x10^-12m÷10^-2m) x (1mL÷1cm^3)

           = 2.837 x 10^-23 mL

1pm=10^-12m

1cm=10^-2m

1mL=1cm^3

density=mass/volume

density of V = 1.69x10^-22g÷2.837x10^-23mL

                    =5.957g/mL

                    =5.96g/cm^3

The least common multiple of the charges for each combination of elements in the table. Ignoring the plus (+) and minus (−) signs of the charges and just entering the numerals. The table is complete as follows.

                          chlorine(Cl)      oxygen(O)         nitrogen(N)

Lithium(Li)                 1                        2                     3

magnesium(Mg)        2                       1                      3

aluminium(Al)            3                       2                     1

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Answer: the first one is incorrect

Explanation:

Halides are ionic substances while halogens nonpolar substances. Hence, halides dissolves in water while halogens dissolve in hexane.

A halogen is an element in group seventeen. The name halogen means salt former. This name came about because many of the halogens form salts. Halides are salts formed by the halogens.

Halogens are diatomic covalent molecules. As such, they are nonpolar molecules and can only effectively interact with nonpolar solvents. Benzene is a nonpolar solvent hence it acts as an effective solvent for the halogens.

The halides are polar compounds hence they do not dissolve in nonpolar solvents such as hexane. Rather, halides dissolve in polar solvents such as water due to dipole - dipole interaction between the ions in the halide and the dipoles in water.

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Answer:

A +1 Ion of Lithium

Explanation:

Lithium has the atomic number of 3, therefore it has 3 protons

An electron has a negative charge, so losing an electron gives an atom a positive charge.

Answer:

Positive 1 ion of lithium

Explanation:

hope this helps!

they don't have any relationship between them

Answer: Adenosine triphosphate, or ATP, is the primary carrier of energy in cells. The water-mediated reaction known as hydrolysis releases energy from the chemical bonds in ATP to fuel cellular processes.

Explanation:

Answer:

being cation it migerates to cathode to be reduced to elemental magnesium

Explanation:

Mg+2. +2e -----------Mg

Answer:

Carbon dioxide, water, and sunlight

Explanation:

Answer:

carbohydrates

Explanation:

or carbon dioxide

Answer:

Water-soluble vitamins are not stored in the body and are excreted in the urine quickly. Unlike water-soluble vitamins, fat-soluble vitamins are dissolved in fat and an excess of them would lead to toxicity if consumed in large amounts because it would lead to rancidity, and they are not easily excreted by urine like water-soluble vitamins.

Even when consumed in high doses, water-soluble vitamins are less likely to create problems since they are eliminated through urine rather than stored.

Vitamins are defined as a collection of molecules required for healthy cell growth, development, and function. While some vitamins support healthy neurons and infection resistance, others may aid in correct blood clotting or food energy absorption.

Water-soluble vitamins are promptly eliminated in the urine and are not retained by the body. In contrast to water-soluble vitamins, which are easily eliminated by urine, fat-soluble vitamins are dissolved in fat. If ingested in excess, they can be harmful due to rancidity and cannot be easily expelled through urine.

Thus, even when consumed in high doses, water-soluble vitamins are less likely to create problems since they are eliminated through urine rather than stored.

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Answer:

(C) Both of these

Explanation:

A beam of electrons has both of these Wave properties and Particle properties.

Answer:

Females

Explanation:

Hope that helps

Answer:

The answer may be no characters

If I'm right or wrong plz reply to me

Answer:

photosynthesis

Explanation:

chloroplasts store sugar which is needed for photosynthesis

Answer:

93.75

Explanation:

In first half life 750×1/2 will remain

In second one half from that remained at the end of first half life will remain

That is 1/2 × 750×1/2

likewise at the end of 3rd half life 1/2 × 1/2 ×750×1/2 remains

at the end of 4th half life 1/2 × 1/2 × 1/2 ×750×1/2 remains

1/2 × 1/2 × 1/2 ×750×1/2 = 93.75 remains.

You can also use the equation

Remainder = X × 1/2^n .

This saves time

n= no. of half lives

X= initial amount

so in this case 1/2^4 × 750 = 93.75

Answer:

Explanation:

Answer:

Hailstones are formed when raindrops are carried upward by thunderstorm updrafts into extremely cold areas of the atmosphere and freeze.

so i'm gonna guess and say that it does not matter because the rain drops freeze in the atmosphere in a cold place.

Explanation:

Hailstones are formed when raindrops are carried upward by thunderstorm updrafts into extremely cold areas of the atmosphere and freeze.

An atmosphere is defined as a blanket of gases that surrounds Earth which held near the surface of the planet by Earth’s gravitational force of attraction.

Argon, oxygen and nitrogen from the three main constituents of the atmosphere, it Helps to retain the sun’s heat and prevents it from escaping back into space, Protects life from harmful radiation, Plays a major role in Earth’s water cycle.

The atmosphere has five distinct layers which are determined by the changes in temperature and it happen with increasing altitude. Layers of Earth’s atmosphere are divided into five different layers as  Exosphere

Thermosphere, Mesosphere, Stratosphere, Troposphere

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Answer:(8.5d) A compound has a formula Mg:(PO.). Which best describes the atoms that make up this compound? A. B. Atom Magnesium (Mg) phosphorus (0) Oxygen (0)

Explanation:

Explanation:

If you use the SI units for P, n, R and T ( In Pa, mol, JK-1mol-1 and K respectively) you'll end up with a Volume with m3 units. So if you have others in different units first convert them into the units I mentioned above and you will definitely get the answer in m3.

Sodium: Na+

Iron (II): Fe2+

Iron (III): Fe3+

Titanium (IV): Ti4+

Vanadium (V): V5+

Ammonium: NH4+

I hope this helps! :)

Given what we know about the mechanisms surrounding the biological movement of substances, we can confirm that when two substances in a secondary active transport move in the same direction, it is called a symport.

A secondary active transport harnesses the electrochemical energy generated by its movement of one substance, to aid the movement of the other. These movements can be of two types, depending on the directions:

An antiport transport will move both substances in opposite directions, meaning one out of the cell and one into the cell. The transport described in the question is that of a symport, given that it moves both substances in the same direction.

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En este caso, dado que se describe un gas del que se conoce el volumen (60L), la presión (1.64 atm) y la temperatura (100K), es posible usar la ecuación del gas ideal para calcular los moles que hay presentes a estas condiciones:

[tex]PV=nRT[/tex]

Ahora, despejamos las moles del gas como sigue:

[tex]n=\frac{PV}{RT}[/tex]

Finalmente, reemplazamos los valores dados, teniendo en cuenta que R es 0.08206 en atmosferas, litros y Kelvin:

[tex]n=\frac{1.64atm*60L}{0.08206*100K}\\\\n=11.8mol[/tex]

Ver más:

Answer:

0.116 moles

Explanation:

To go from grams to moles, you take the given mass (1.39g) and divide it by the molar mass (which is about 12 grams for Carbon). This gives you the moles. I have attached my work below.

Hope this helps! :^)

Answer:

Gin= Machine that picks cotton

Explanation:

This Machine was used in the early 1940s to help pick cotton to make things.

Answer: In this order

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune

Explanation:

Answer:

Mars.....................

Answer:

i wonder...................

Explanation:

Explanation:

The maximum no. of electrons in a shell is given by. 2n^2 .

So for

n= 5 , 2× 5× 5 = 50

n=2 , 2×2×2 = 8

For a sub shell the maximum no. of electrons possible is given by 2(2l + 1)

So for n= l= 0

2 [(2×0) +1] = 2

for n=2 l=1

2 [(2×1) + 1] = 6

3d

d sub shell has l= 2 quantum number

Therefore 2[ (2×2) + 1] = 10

2s

s sub shell has l=0 quantum number

2 [(2×0) +1] = 2

5f

f sub energy level has l=3 quantum number

So 2[ (2×3) +1 ] = 14

The azimuthal quantum numbers for the sub shells are as follows

( s ---> 0

p----> 1

d----> 2

f ----> 3 )

A) A plastic pot handle.

Metals are very good conductors of heat because they contain delocalised electrons that can flow through the metal, transferring heat.

Both a copper pan and a metal spoon are made of metals, so are very good conductors of heat.

Plastic is an insulator, the opposite of a conductor. This makes it very bad at conducting heat, which is why it is used as the handle (it stops you burning yourself when you hold the pot). The answer is therefore A.