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Question 5 only!

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:

Explanation:

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Answer:

Dominos prank call hahahaha

Answer:

why

Explanation:

Answer:

Air in the atmosphere acts as a fluid. The sun's radiation strikes the ground, thus warming the rocks. As the rock's temperature rises due to conduction, heat energy is released into the atmosphere, forming a bubble of air which is warmer than the surrounding air. This bubble of air rises into the atmosphere.

Explanation:

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Answer:

150g-125g

=25 of hot chocolate mix

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: [tex]8.38\times 10^{23}atoms[/tex] of carbon

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.

mass of sugar= [tex]density\times volume=1.59g/ml\times 25ml=39.75g[/tex]

To calculate the moles, we use the equation:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}=\frac{39.75g}{342.3g/mol}=0.116moles[/tex]

1 mole of sugar [tex]C_{12}H_{22}O_{11})[/tex] contains = [tex]12\times 6.023\times 10^{23}=72.28\times 10^{23}atoms[/tex] of carbon

0.116 mole of sugar [tex]C_{12}H_{22}O_{11})[/tex] contains = [tex]\frac{72.28\times 10^{23}}{1}\times 0.116=8.38\times 10^{23}atoms[/tex] of carbon

Answer:

24.5°C

Explanation:

im so sorry if i got it wrong but u dont gotta mark me as brainliest cuz im dum:(

Answer:

Cause snow is cold.

Explanation:

THANK YOU

1.Oort Cloud

2.Uranus Earth and Mars

3.Kuiper Belt

4.Asteroid Belt

Answer:Two

Explanation:

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.

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:

last one

Explanation:

Answer:

full moon

hope this helps

Answer:

Sunlight penetrates the top layers of the ocean, so photosynthesis occurs there. ... Upwelling brings nutrients to the surface.

Answer:

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

Explanation:

Answer:

primary consumers and sometimes plants

Answer:

Calcium iron oxide (CaFe2O4)

PubChem CID 6336546

Molecular Formula CaFe2H8O4

Synonyms Calcium iron oxide (CaFe2O4) 12013-33-1 Calcium ferrite EINECS 234-584-5

Molecular Weight 223.83 g/mol

Component Compounds CID 23925 (Fe) CID 5460341 (Calcium) CID 962 (Water)

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:

https://brainly.com/question/18812151

Answer:

The answer is honey.

Explanation:

Answer: alcohol

Explanation:

Answer:

binary and 11

Explanation:

CaCl2 or Calcium Chloride is an ionic bond and not a covalent bond. Since there should be sharing of electrons between two atoms to be a covalent bonding. In case of calcium chloride, the calcium gives up an electron to each chlorine atom, becoming Ca2+ ions and chlorine become Cl– ions.

:)

Answer:

natural selection

Explanation:

Answer:

dude

Explanation:

dude use a calculator, \ USE A CALCULATOR

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:

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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:

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:

Because the particles are in motion, they will have kinetic energy. The particles will not all have the same energy, and the energy of the particles is constantly changing as they undergo changes in speed. Thus, for a given sample of matter, we can only talk about the average kinetic energy of the particles.

Explanation:

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We do know that if we "give" energy to a given object, the temperature of the object increases.

So there is a direct relationship between temperature and energy.

From this idea, we can conclude that:

"As we increase the energy, we also will see an increase in molecular motion."

We also do know that, as the temperature of an object increases, also does the kinetic energy of the particles that conform to the object (as the kinetic energy increases, the particles move more, this is why as we increase the temperature we usually see an increase in the volume of the object).

This increase in kinetic energy is related to the molecular motion (the movement of the electrons and nucleus o a molecule) as the kinetic energy of these parts increase, these move more.

So the relationship between molecular motion and energy is:

As we increase the energy, we also will see an increase in molecular motion.

If you want to learn more, you can read:

https://brainly.com/question/12280673