Explaining Radioactive Decay
Explain the process of radioactive decay. What happens during radioactive decay, and what is the result at the end of radioactive decay?

Answer:

[tex]\boxed {\boxed {\sf About \ 1.040 \ moles \ of \ nitrogen }}[/tex]

Explanation:

To convert from grams to moles, we must use the molar mass. This can be found on the Periodic Table. We have a sample of nitrogen, so look for N on the table.

Now, use this molar mass as a ratio.

[tex]\frac {14.007 \ g \ N }{1 \ mol \ N }[/tex]

Multiply by the number of grams in the sample (14.57)

[tex]14.57 \ g \ N *\frac {14.007 \ g \ N }{1 \ mol \ N }[/tex]

Flip the fraction so the grams of nitrogen will cancel.

[tex]14.57 \ g \ N *\frac {1 \ mol \ N }{14.007 \ g \ N}[/tex]

[tex]14.57 *\frac {1 \ mol \ N }{14.007 }[/tex]

[tex]\frac {14.57 \ mol \ N }{14.007 }[/tex]

[tex]1.04019419 \ mol \ N \\[/tex]

The original measurement of grams had 4 significant figures, so we need to round our answer to the same number of sig figs.

For the number we calculated, that is the thousandth place. The 1 in the ten thousandth place tells us to keep the 0 in the thousandth place.

[tex]1.040 \ mol \ N[/tex]

There are about 1.040 moles of nitrogen in 14.57 grams.

Answer:

This accepting atom will then become an anion. The anion has more electrons than protons. This means that some of the electrons will not be canceled out, giving the atom an overall negative charge.

If an object has more protons than electrons, then the net charge on the object is positive. If there are more electrons than protons, then the net charge on the object is negative. If there are equal numbers of protons and electrons, then the object is electrically neutral.

Explanation:

Answer:

Explanation:  Correct on Edg 2020/2021.

Answer:

Photosynthesis.

Explanation:

In photosynthesis process, carbondioxide gas enters into plant leaves from which plant produces organic molecules such as glucose. This glucose helps the plant to increase it growth and complete development stages and finally the plant dies and buried in the soil so due to decomposition process, the carbon present in the plant body releases in the soil and become part of sediments. So indirectly photosynthesis process provides carbon to the soil.

Answer:

30.11×10²³ molecules

Explanation:

Given data:

Mass of NaOH = 200.0 g

Number of molecules of water formed = ?

Solution:

Chemical equation:

2NaOH + H₂SO₄      →     2H₂O + Na₂SO₄

Number of moles of NaOH:

Number of moles = mass/molar mass

Number of moles = 200 g/ 40 g/mol

Number of moles = 5 mol

Now we will compare the moles of NaOH and H₂O.

                      NaOH         :        H₂O

                          2             :          2

                         5              :            5

Number of molecules of water:

1 mole contain 6.022×10²³ molecules

5 mol × 6.022×10²³ molecules / 1mol

30.11×10²³ molecules

Answer:

I have it.

Explanation:

Answer:

Molecular formula = C₄H₁₂O₂

Explanation:

Given data:

Percentage of hydrogen = 13.80%

Percentage of carbon = 51.02%

Percentage of oxygen = 35.18%

Molecular formula = ?

Solution:

Number of gram atoms of H = 13.80 / 1.01 = 13.6

Number of gram atoms of O = 35.18 / 16 = 2.2

Number of gram atoms of C = 51.02 / 12 = 4.25

Atomic ratio:

            C                      :      H             :         O

           4.25/2.2           :     13.6/2.2     :       2.2/2.2

            2                      :        6          :        1

C : H : O = 2 : 6 : 1

Empirical formula is C₂H₆O.

Molecular formula:

Molecular formula = n (empirical formula)

n = molar mass of compound / empirical formula mass

Empirical formula mass = C₂H₆O = 46 g/mol

n = 88 / 46

n = 2

Molecular formula = n (empirical formula)

Molecular formula = 2 (C₂H₆O)

Molecular formula = C₄H₁₂O₂

Answer:

Transferring energy into or out of a substance changes its temperature, which changes the molecules' freedom of movement. Claim 2: Transferring energy into or out of a substance changes the molecules' kinetic energy, which changes their freedom of movement.

Answer:

A student is drinking a cup of hot chocolate as they sit by a campfire on a chilly evening. They know that the cup of hot chocolate transfers thermal energy to the surrounding air. The heated air over their cup of hot chocolate expands and rises and is replaced by cooler, denser air.

This method of energy transfer is

Explanation:

Answer:

radiation

Explanation:

radiation is when an existing heat source spreads heat to its surroundings

The volume of the suspension required : 10 ml

Given

0.500 g of ampicillin

The liquid suspension concentration = 250 mg/5 mL

Required

The volume of the suspension required

Solution

The concentration of a substance can be expressed in various units such as molarity, ppm, g / L etc.

Each unit change, we must pay attention to the conversion factor

Conversion g to mg

0.5 g = 500 mg

The volume of the suspension needed :

=mass x concentration

[tex]\tt \dfrac{500~mg}{250~mg/5~ml}=500~mg\times \dfrac{5~ml}{250~mg}\\\\=10~ml[/tex]

Answer:

The baby sharks are not connected to their mum through an umbilical cord. Instead, they feed on their egg's yolk supply, other unfertilized eggs or even the embryos of their brothers and sisters. Through the latter method, only the strongest 1-3 sharks will get born, which is seen in the sand tiger shark.

Explanation:

Explanation:

Given species:

     Magnesium metals  = Mg

      Oxygen gas  = O₂  

Magnesium metal and oxygen gas are the reactants in this chemical process,

              2Mg + O₂   →   2MgO

The product of the reaction is MgO because both oxygen and magnesium are divalent.

This reaction is called a combination reaction where two species combines to form a single compound.

Answer:because they run out of energy when it is transferred and to other objects, or their kinetic energy

Explanation:

The balanced equation

2Al(NO₃)₃ +  3FeCl₂ ⇒ 3Fe(NO₃)₂ + 2AlCl₃

Given

Reaction

Al(NO₃)₃ +  FeCl₂ --> Fe(NO₃)₂ + AlCl₃

Required

Balanced equation

Solution

Give a coefficient

aAl(NO₃)₃ +  bFeCl₂ --> Fe(NO₃)₂ + cAlCl₃

Make an equation

Fe, left=b, right=1⇒b=1

N, left=3a, right=2⇒3a=2⇒a=2/3

Cl, left=2b, right=3c⇒2b=3c⇒2.1=3c⇒c=2/3

The equation becomes :

2/3Al(NO₃)₃ +  FeCl₂ --> Fe(NO₃)₂ + 2/3AlCl₃ x3

2Al(NO₃)₃ +  3FeCl₂ --> 3Fe(NO₃)₂ + 2AlCl₃

Answer:

Producers

Explanation:

An autotroph is an organism that can produce its own food using light, water, carbon dioxide, or other chemicals. Because autotrophs produce their own food, they are sometimes called producers.

CH4 + 2O2 =》CO2 + 2H2O

Answer:

the balanced chemical reaction is provided above .

Explanation:

the given reaction is reaction of methane with oxygen ( or burning of methane in presence of oxygen )

it is highly exothermic, because high amount of heat is evolved in this reaction

where it was formed and. conditions it was formed under

Answer:

Explanation:

1 is true

2 is false

3 is true

4 is true

5 is false

That is what I got from researching.

Only about 3% of the water in the Earth is fresh water and about 75 % of the fresh water on Earth is frozen in ice sheets.  

• The most vital element present on the Earth is water. All the living beings are dependent on it.  

• Water is present in the majority of the Earth, however, of this only 3% of the water is freshwater, the rest is saline and undrinkable.  

• Of this 3%, the 75 percent of the freshwater is present in the form of ice and glaciers in the polar region.  

• The remaining 24 percent is the groundwater and the rest 1 percent includes the waters of rivers, lakes, and ponds.  

• The prime source of usable freshwater is present in the trapped form in the ice and glaciers.  

Thus, the correct statements are 1st and 3rd.

To know more about:

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Answer:

There is nothing with data to help us complete this chart

THIS IS BAD. THIS IS REALLY BAD

Answer:

1. 0.0033 moles of water.

2. 270g of water

3. 12.8g NaCl

4. 6.72g NaHCO3

5. 1190moles Fe2O3

Explanation:

To convert moles to grams or vice versa we require tu use molar mass of the substance as follows:

1. Molar mass water: 18g/mol

0.060g * (1mol / 18g) = 0.0033 moles of water

2. Molar mass water: 18g/mol

15 moles H₂O * (18g / 1mol) = 270g of water

3. We can assume all sea salt is NaCl -Molar mass: 58.44g/mol-

750g NaCl * (1mol / 58.44g) = 12.8g of NaCl

4. Molar mass NaHCO₃: 84g/mol:

0.080mol * (84g/mol) = 6.72g NaHCO3

5. Molar mass Fe2O3: 159.69g/mol:

190kg = 190000g * (1mol / 159.69g) = 1190moles Fe2O3

Answer:

A) attract

Explanation:

hope it helps you

To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. Therefore, the correct option is option A.

Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.

In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge. Neutron is neutral that is it has no charge. So overall the charge of nucleus is due to only proton, not by neutron. Just like the N and S poles on bar magnets, electrons and protons attract each other.

Therefore,  the correct option is option A.

To know more about atom, here:

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Answer:

A. The sample's boiling point

Explanation:

Because by knowing boiling point we easily find a substance for example if given clear liquid boiling point is 100 c° we immediately know this is water.

Moreover boiling point is a fixed quantity for a substance.

Answer:

b

Explanation:

Answer:

it is B hope I helped

=

Explanation:

Answer:

melting point, hardness, odor, temperature

Answer: 70.0°C

Explanation:

Quantity of heat = Mass * Specific heat * Change in temperature

Quantity of heat = 104.6 KJ

Mass = 500.0 g

Specific heat of water is 4.18 J/g°C

Change in temperature assuming final temperature is x = x - 20

Units should be in grams and joules:

104,600 = 500 * 4.18 * (x - 20)

104,600 = 2,090 * (x - 20)

x - 20 = 104,600/2,090

x = 104,600/2,090 + 20

x = 69.8

= 70.0°C

Explanation:

1 mole is equal to 1 moles Iron(III) or 832.29538 grams, so 2 moles Iron(III) = 1664.59076 grams

Answer:

K-sylvite

Na-rock salt

Explanation:

Sylvite is a colourless or white mineral consisting of potassium chloride, occurring typically as cubic crystals(Oxford dictionary). It is the primary ore of potassium metal. It appears colorless, sometimes with a shade of red.

Rock salt is a primary ore of sodium. It is found in rocks, seas etc. Rock salt is sometimes commonly called halite. It usually appears white in colour and is rich in sodium.

Answer:

3

Explanation:

It's basically saying what number goes into 12 four times, I think.