Picture a neutral S atom. This neutral atom will have
valence electrons. To reach a more stable configuration, this atom will
(gain, lose) electrons. The charge of the ion that forms will be
ASAP PLEASE

Mass of Calcium phosphate : = 21127.7 g

Given

4.1 x 10²⁵ particles of Calcium phosphate

Required

mass

Solution

The mole is the number of particles(molecules, atoms, ions) contained in a substance  

1 mol = 6.02.10²³ particles

Can be formulated

N=n x No

N = number of particles

n = mol

No = Avogadro's = 6.02.10²³

mol Calcium phosphate :

n = N : No

n = 4.1 x 10²⁵ : 6.02 x 10²³

n = 68.11

mass Calcium phosphate Ca3(PO4)2 :

= mol x MW

= 68.11 x 310.2 g/mol

= 21127.7 g

= 21.13 kg

Answer:

Answer:

natural selection

Explanation:

The gravitational potential energy of a basketball  : PE = 18.375 J

Given

height = h = 3 m

mass = 0.625 kg

Required

The potential energy

Solution

The energy produced from its position is called potential energy (PE)  

which can be formulated as:  

PE = m. g. h (g = 9.8 m/s²)

Input the value :

PE = 0.625 x 9.8 x 3

PE = 18.375 J

Answer:

The answer is honey.

Explanation:

Answer: alcohol

Explanation:

Answer:

Cause snow is cold.

Explanation:

THANK YOU

Answer:

Explanation:

Acid rain that seeps into the ground can dissolve nutrients, such as magnesium and calcium, that trees need to be healthy. Acid rain also causes aluminum to be released into the soil, which makes it difficult for trees to take up water. ... The acidic clouds and fog strip important nutrients from their leaves and needles.

b or c

i think c im not sure

i hope it's right!!

A solute that has been dissolved in a solvent b) can be recovered by a process involving its chemical properties.

A substance that is dissolved in a solution is referred to as a solute. In fluid solutions, the quantity of solvent present is extra than the quantity of solute. One best example of solute in our each day hobby is salt and water. Salt dissolves in water and therefore, salt is the solute.

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Answer: 5 moles of NaF would be produced when 550 grams of Sodium bromide are used.

Explanation:

From the question, the balanced chemical formula is illustrated below:

2NaBr + CaF2 → 2NaF + CaBr2

From the equation above;

Molecular mass of NaBr = 23 + 80 = 103g/ mol

Molecular mass of CaF2= 40+ (19×2)= 78g/ mol

Molecular mass of NaF = 23+19 = 42g/ mol

From the balanced chemical equation;

2 moles of NaBr reacted with 1mole of CaF to give 2 moles of NaF.

That is, 2 moles of NaBr= 2× 103 = 206g

2moles of NaF = 2×42= 84g

If 206g of NaBr yielded 84g of NaF

Therefore 550g of NaBr will yield Xg of NaF

X= 550×84/206

X= 224.27g of NaF

But 42g = 1 mole of NaF

Therefore 224.27g = X mole of NaF

X= 224.27 ×1/42

X is approximately 5moles.

Answer:

A. The rate of the reverse reaction increases with an increase in the concentration of CaCO3(s)

Explanation:

If the concentration of a reactant has increased, The substance will shift in the direction of the reaction that uses the reactants, So that the Reactants substance Increases.

Answer:

17188 years

Explanation:

Given that;

0.693/t1/2 = 2.303/t log (Ao/A)

Where;

t1/2 = half life of carbon -14

t = time taken

Ao = activity of a living sample

A activity of the artifact

0.693/5730 = 2.303/t log (32/4)

1.21 * 10^-4 = 2.303/t * 0.9031

1.21 * 10^-4 = 2.0798/t

t = 2.0798/1.21 * 10^-4

t = 17188 years

Answer:

D

Explanation:

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Answer:

C. the ice cube and the glass of water have higher heat capacity than the swimming pool

Answer:

Number of Fe atoms = 2.709 × 10^23 atoms.

Explanation:

Given the following data;

Number of Fe moles = 0.450 mole

We know that Avogadro constant is equal to 6.02 * 10^23 mol¯¹

Number of Fe atoms = number of Fe moles * Avogadro constant

Substituting into the equation, we have;

Number of Fe atoms = 0.450 × 6.02 * 10^23

Number of Fe atoms = 2.71 × 10^23 atoms.

Note: Fe is the symbol for the chemical element Iron.

Answer:

The percent yield for ethanol in this process is 95.2%

Explanation:

Yield is the ratio between the amount of product actually obtained in the reaction and the maximum amount of product that could have been obtained if the reagents had been completely consumed.

The theoretical yield is the yield is the maximum you can get in a reaction.

On the other hand, the actual performance shows what you really get in experimentation. It is generally less than the theoretical yield.

So, the percentage return is the actual return times the theoretical return multiplied by 100.

So, in this case the percentage yield will be calculated as:

[tex]percent yield=\frac{4,760 kg}{5,000 kg} *100[/tex]

percent yield=  95.2%

The percent yield for ethanol in this process is 95.2%

Answer:

150g-125g

=25 of hot chocolate mix

Answer:

it produce atp

Explanation:

.............

Cellular respiration is a metabolic process that occurs in the cells of an organism. Carbon dioxide from cellular respiration aids the process of photosynthesis.

Cellular respiration is a process that takes place in the organism's cell where the cellular oxygen or chemical energy gets utilized and converted to ATP and waste like carbon dioxide.

The carbon dioxide released by the organism in the atmosphere is used by plants in the process of photosynthesis. Photosynthesis is a process that utilizes carbon and water to form glucose and oxygen.

Therefore, cellular respiration supports the process of photosynthesis by option D. producing carbon dioxide.

Learn more about cellular respiration and photosynthesis here:

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Answer:

dude

Explanation:

dude use a calculator, \ USE A CALCULATOR

Answer:

The mass of silver is 49 g (0.049 kg).

Explanation:

Initial temperature = [tex]30^{o}[/tex]C

Final temperature = [tex]40^{o}[/tex]C

Quantity of heat required = 117.5 J

Specific heat capacity of silver = 0.240 J/g[tex]^{o} C[/tex]

mass of the silver can be determined by;

Q = mcΔθ

Where: Q is the quantity of heat required, m is the mass of substance, c is the specific heat capacity of the substance and Δθ is the change in temperature.

So that,

117.5 = m x 0.240 x (40 - 30)

117.5  = m x 0.24 x 10

        = 2.4m

m = [tex]\frac{117.5}{2.4}[/tex]

   = 48.9583

m ≅

m = 49 g

The mass of silver is 49 g (0.049 kg).

Answer:volume occupied by 40 grams of argon gas (Ar) at standard conditions = 22.443L

Explanation:

Using the ideal gas law that

PV =nRT  

Where p  =pressure,  

V = volume,  

n = number of moles  

R = gas constant, and  

T= temperature in Kelvin.

Since Argon is at STP( Standard conditions), This means that temperature is   273.15 K  and pressure is  1 atm

Also the  gas constant= 0.08206 L atm/K mol . we  are using this value because its  units match the units of our values to aid easy calculation

So,

Number of moles = Mass/ Molar mass

=40g/39.948 g/mol

Number of moles of Argon=1.0013moles.

Now Bringing

pV= nRT

V= nRT/p

=(1.0013mol x 0.08206 L atm/K mol x 273.15 K  ) /1atm

Volume =22.443L

Answer:

Explanation:

may u explain what u mean then i will be able to help u because i like knows this but what u mean will be better so i can tell u the right answer thanks have a good day

Answer:

It will have 5 valence electrons as its in group 5.

The atom will gain as its closer to the full configuration 8.

The charge will be 3- as it will gain 3 electrons.

Answer:

Melting points are often used to characterize organic and inorganic crystalline compounds and to ascertain their purity. Pure substances melt at a sharp, highly-defined temperature (very small temperature range of 0.5 – 1 °C) whereas impure, contaminated substances generally exhibit a large melting interval.

Explanation:

I hoped this helps a bit! ^^

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Answer:Two

Explanation:

Answer:

Is used to predict the spectra of hydrogen and hydrogen like species

Explanation:

The Bohr's model of the atom was propounded by Neis Bohr. In his theory, an atom is composed of quantized energy levels in which electrons may be found.

The transition of an electron between energy levels leads to the absorption or emission of energy in the form of a photon of visible light. The energy absorbed or emitted depends on the energy difference between the two energy levels.

The model is successful at predicting the electronic spectra of one electron species but totally fails when the specie has more than one electron. Also, the model fails to show the true shape of the electron orbitals within an atom.

Answer:

b is the answer my brudaa

Explanation:

Answer:

C-The principal because he or she controls all the activity in the school

Answer:

[tex]Mg^{2+}+2OH^{-}=>Mg(OH)2[/tex]

Explanation:

Answer:

24.5°C

Explanation:

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