If you have 12 atoms of hydrogen before a chemical reaction, how many atoms of hydrogen will be present after the chemical reaction?

Answer:

i need help with that too.

Explanation:

Answer:

2nd one

Explanation:

Fact!

Answer:

2 atoms

Explanation:

Sodium Chloride or NaCl is made up of two elements, sodium (or Na) and chlorine (or Cl). A molecule of sodium chloride, NaCl, consists of one atom each of sodium and chlorine. Hence, each molecule of NaCl has 2 atoms total.

2原子。塩化ナトリウムまたはNaClは、ナトリウム（またはNa）と塩素（またはCl）の2つの元素で構成されています。

There are approximately 3.01 x 10²² atoms in 5 grams of NaCl.

To calculate the number of atoms, we first need to convert the mass of NaCl into moles. The molar mass of NaCl is 58.44 g/mol, which is the sum of the atomic masses of sodium (22.99 g/mol) and chlorine (35.45 g/mol).

Using the formula:

moles = mass / molar mass

we can calculate the number of moles of NaCl in 5 grams:

moles = 5 g / 58.44 g/mol ≈ 0.0857 mol

Next, we need to use Avogadro's number, which is approximately 6.022 x 10²³ atoms/mol, to convert moles into atoms.

Number of atoms = moles x Avogadro's number

Number of atoms = 0.0857 mol x 6.022 x 10²³ atoms/mol ≈ 5.16 x 10²² atoms

Therefore, there are approximately 3.01 x 10²² atoms in 5 grams of NaCl.

It's important to note that this calculation assumes that all the NaCl is fully dissociated into its constituent atoms, which may not be the case in all situations.

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Answer:

well, I think the answer is C

The difference between RNA and DNA are:

A. DNA and RNA use different sets of nitrogen bases.

C. DNA contains deoxyribose sugar and RNA contains ribose sugar.

DNA and RNA, both are genetic materials, but DNA is double-stranded and RNA is single-stranded.

DNA is present in all animals and plants, and RNA is present in viruses and bacteria.

Both are made up of nitrogenous bases and sugar.

Thus, the correct options are A and C.

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Answer:

[tex]V_2=1099.35mL[/tex]

Explanation:

Hello there!

In this case, according to the given information, it is possible to infer that as both the amount of the gas and the pressure remains the same, we can solve this problem via the Charles' law a directly proportional relationship between the volume and temperature:

[tex]\frac{V_2}{T_2} =\frac{V_1}{T_1}[/tex]

Thus, by solving for the final volume, V2, we obtain:

[tex]V_2 =\frac{V_1T_2}{T_1} \\\\V_2 =\frac{886mL*371K}{299K}\\\\V_2=1099.35mL[/tex]

Best regards!

Answer:

–99 °C

Explanation:

From the question given above, the following data were obtained:

Initial pressure (P₁) = 1.5 atm

Initial temperature (T₁) = 25 °C

Final pressure (P₂) = 1 atm

Change in temperature (ΔT) =?

Next, we shall determine the final temperature. This can be obtained as follow:

Initial pressure (P₁) = 1.5 atm

Initial temperature (T₁) = 25 °C + 273 = 298 K

Final pressure (P₂) = 1 atm

Final temperature (T₂) =?

P₁/T₁ = P₂/T₂

1.5 / 298 = 1 / T₂

Cross multiply

1.5 × T₂ = 298

Divide both side by 1.5

T₂ = 298 / 1.5

T₂ = 199 K

Converting 199 K to °C, we have:

T(°C) = T(K) – 273

T₂ = 199 – 173

T₂ = –74 °C

Finally, we shall determine change in temperature. This can be obtained:

Initial temperature (T₁) = 25 °C

Final temperature (T₂) = –74 °C

Change in temperature (ΔT) =?

ΔT = T₂ – T₁

ΔT = –74 – 25

ΔT = –99 °C

Thus, the change in the temperature is –99 °C

Answer:

16.85mol

Explanation:

The number of moles of a substance can be calculated by dividing the mass of that substance by its molecular mass. That is;

number of moles (n) = mass (m) /molar mass (MM)

Molar mass of lithium = 6.9g/mol

Hence,

number of moles = 116.3 ÷ 6.9

Moles = 16.85mol

Therefore, 16.85moles is present in 116.3g of Li.

Answer:

!dk bestie i tried to do it but i cant maybe someone else can figure it or they already did :( anyway i hope you have a amazing day luv <3

Answer:

Kinetic Energy

Explanation:

Temperature and Kinetic Energy are directly proportional.

Answer:

8.334×10^-6 moles

Explanation:

a mole is 6.023×10^23

5.02×10^18 ÷ 6.023×10^23=8.33×10^-6

so there are 8.33×10^-6 moles of water in 5.02x10^18 molecules of water

The number of moles of water in which 5.02 × 10¹⁸ molecules of water is present is 8.33 × 10⁻⁶.

Moles is a unit which is used to tells about the quantity of any substance, in one moles of any substance 6.023 × 10²³ number of atoms of that substances are present.

In 1 mole of water = 6.023 × 10²³ number of molecules of water is present

So, number of 5.02 × 10¹⁸ molecules of water present in how many moles will be calculated as:
Required moles = 5.02 × 10¹⁸ / 6.023 × 10²³ = 8.33 × 10⁻⁶

Hence, required moles is 8.33 × 10⁻⁶.

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Explanation:

The tidal forces of the Moon are much stronger than the Sun's because it is so much closer to our planet, causing a much greater variation in the gravitational force from one location to another. The Sun's gravitational force, on the other hand, varies much less because the Sun is so far.

Answer:

possibly because of the malleability of metals

Explanation:

In metallic bonding, electrons are delocalized and move freely among nuclei. When a force is exerted n the metal, the nuclei shift, but the bonds do not break, giving metals their characteristic malleability.

Answer:

B) Oxygen atoms

Explanation:

When metals react oxygen atom then they tend to form metal oxides which are basic in nature. This is because when metal oxides are added in water then it results in the formation of metal hydroxides which are alkaline in nature

Answer:C

Explanation: I learnet it too but more time ago hope its good

Answer:

Heat is a specific spectrum of the temperature scale while temperature is a lot broader

Explanation:

Answer:

750 g of CO₂

Explanation:

The balanced equation for the reaction is given below:

C₃H₈ + 5O₂ —> 3CO₂ + 4H₂O

Next, we shall determine the mass of C₃H₈ that reacted and the mass of CO₂ produced from the balanced equation. This can be obtained as follow:

Molar mass of C₃H₈ = (12×3) + (8×1)

= 36 + 8 = 44 g/mol

Mass of C₃H₈ from the balanced equation = 1 × 44 = 44 g

Molar mass of CO₂ = 12 + (16×2)

= 12 + 32 = 44 g/mol

Mass of CO₂ = 3 × 44 = 132 g

SUMMARY:

From the balanced equation above,

44 g of C₃H₈ reacted to produce 132 g of CO₂.

Finally, we shall determine the mass of CO₂ produced by the reaction of 250 g of C₃H₈. This can be obtained as follow:

From the balanced equation above,

44 g of C₃H₈ reacted to produce 132 g of CO₂.

Therefore, 250 g of C₃H₈ will react to produce = (250 × 132)/44 = 750 g of CO₂.

Thus, 750 g of CO₂ were obtained from the reaction.

The number of grams of carbon dioxide should be 750 grams.

Since

The balanced equation for the reaction is

C₃H₈ + 5O₂ —> 3CO₂ + 4H₂O

Now

Molar mass of C₃H₈ = (12×3) + (8×1)

= 36 + 8 = 44 g/mol

Hence, Mass of C₃H₈ from the balanced equation = 1 × 44 = 44 g

Now

Molar mass of CO₂ = 12 + (16×2)

= 12 + 32 = 44 g/mol

Hence, Mass of CO₂ = 3 × 44 = 132 g

Now the no of grams should be

= (250 × 132)/44

= 750 g of CO₂.

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Answer:

Conclusion.....hope this helps

Answer:

conclusion

Explanation:

Answer:

Kinetic energy!

Explanation:

It measures the average kinetic energy of the molecules of a substance in degrees Fahrenheit (F) or Celsius (C).

Have a good day!!

Answer:

They're sometimes called 'mackerel skies' because they can sometimes have a grayish color which makes the clouds look a bit like fish scales. Cirrocumulus clouds exhibit features from both cumulus and cirrus clouds but should not be confused with altocumulus clouds.Explanation:

Answer:

Explanation:

How best to demonstrate the equivalence of hydrogens in  

H 2 C = C H 2 ?

1 H NM R spectroscopy would be the best way to show this. The 4 hydrogens give the one signal.

Explanation:

Answer:

See explanation

Explanation:

1 mole of Ne occupies 22.4 L

x moles of Ne occupies 18.6 L

x = 1 mole *  18.6 L/22.4 L

x = 0.83 moles

1 mole contains 6.02 * 10^23 atoms

0.83 moles occupies  0.83 moles *  6.02 * 10^23 atoms/1 mole

= 4.9966 * 10^23 atoms = 5.0  * 10^23 atoms

the coefficient of the scientific notation answer =5.0

the exponent of the scientific notation answer = 23

significant figures are there in the answer = 5

the right most significant figure in the answer = 1

Answer:

Because the Earth's gravity acts on the atmosphere and holds it down, just as it does all other objects. The weight of the atmosphere is estimated to be about 5.75 quadrillion (5,750,000,000,000,000) tons. Air pressure is the "push" of the atmosphere on the Earth's surface.

Answer:

F=ma where F = force in N, m = mass in g and a = acceleration in [tex]m/s^{2}[/tex]

Answer:

1/375

Explanation:

Primero se debe calcular el factor de dilución para cada dilución seriada. Para ello, se divide el volumen de muestra entre el volumen final de la solución diluida.

1) 1 mL  en 1 mL + 4 mL = 5 mL

D1 = 1 mL/5 mL = 1/5

2) 0,5 mL en 5 mL

D2 = 0,5 mL/5 mL = 1/10

3) 0,2 mL en 0,2 mL + 1,3 mL = 1,5 mL

D3 = 0,2 mL/1,5 mL = 2/15

La dilución total se calcula como el producto de las diluciones seriadas realizadas:

DT = D1 x D2 x D3 = 1/5 x 1/10 x 2/15 = 1/375

Answer:

C2H6 has the greatest amount of atoms.

Explanation:

Answer:

600mL

Explanation:

Molarity of a solution (M) = number of moles (n) ÷ volume (V)

number of moles = mass/molar mass

Molar mass of NaOH = 23 + 16 + 1

= 40g/mol

mole = 30/40

n of NaOH = 0.75mol

Using Molarity = n/V

V = number of moles ÷ molarity

V = 0.75 ÷ 1.25

V = 0.6L

In milliliters (mL), the volume of NaOH will be 0.6 × 1000

= 600mL

Answer:

pOH = 1.3, pH = 12.7

Explanation:

Since NaOH is a strong base, it will completely ionize; further, since it completely ionizes, our hydroxide concentration (a product of the ionization) will be the same as the given concentration of NaOH.

NaOH -> Na⁺ + OH⁻, [OH⁻] = 5.0 x 10^-2 M

pOH is the negative log of the hydroxide concentration, so plug our hydroxide concentration in:

pOH = -log[OH⁻] = -log[5.0 x 10^-2 M] = 1.3

Since pH + pOH = 14, we can plug in pOH and solve for pH:

pH + 1.3 = 14

pH = 14 - 1.3 = 12.7

Thus, our pOH = 1.3 and pH = 12.7.

Answer:

gamma rays

Explanation:

gamma Ray's have the highest frequency

Answer:

true

Explanation: