In a reaction between sodium and oxygen to make sodium oxide. How many
liters of oxygen is needed to make 5.50 moles of sodium oxide? Write the
numerical answer only. *
Your answer
check your chemical reactions

The empirical formula for sulfur and oxygen will be SO₃.

Steps to writing empirical formula,

Step 1: write the symbol of each element.

Step 2: write their percentage composition

Step 3: divide by atomic mass in percentage composition of each element.

step 4: divide all values obtained in the above step by the smallest value obtained in the above step.

steps 5: The ratio of the number of atoms obtained in the above step will represent the empirical formula of the compound. The empirical formula represents the simplest ratio of atoms.

Now percentage composition of \($s=\frac{\text { mass of } s}{\text { total mass }} \times 100$\)

\(\begin{aligned}&=\frac{16.03}{16.03+24} \times 100 \\&=40 \%\end{aligned}\)

percentage composition of O\($=\frac{\text { mass of } O}{\text { tofalmass }} \times 100$\)

\(\begin{aligned}&=\frac{24}{16.03+24} \times 100 \\&=60 \%\end{aligned}\)

Step 1:         S                   O

Step 2:       40                  60

Step 3:       40/32=1.25    60/16 =3.75

Step 4:       1.25/1.25         3.75/1.25

Step 5:         1                     3

Thus the ratio of atoms of s & 0 is 1: 3.

So the empirical formula will be \($\mathrm{SO}_{3}$\)

What is the Empirical formula?

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Answer:

Approximately \(0.6003\; \rm mol\) formula units.

Explanation:

Look up the relative atomic mass data for \(\rm K\), \(\rm Cl\), and \(\rm O\) on a modern periodic table:

The relative atomic mass of an element is numerically equal to the mass (in grams) of one mole of its atoms. For example, the relative atomic mass of \(\rm K\) is \(39.908\). Therefore, the mass of one mole of \(\rm K\!\) atoms should be \(39.908\; \rm g\).

Each \(\rm KClO_3\) "formula" unit includes one \(\rm K\) atom, one \(\rm Cl\) atom, and three \(\rm O\) atoms. Therefore, one mole of \(\rm KClO_3\!\) formula units would include:

From the relative atomic mass of these three elements:

Combining these three parts should give the mass of one mole of \(\rm KClO_3\) formula units:

\(\begin{aligned}& M(\mathrm{KClO_3}) \\ &= 39.908 + 35.45 + 3 \times 15.999 \\ &= 122.545\; \rm g \cdot mol^{-1}\end{aligned}\).

The formula mass of \(\rm KClO_3\) is \(M(\mathrm{KClO_3}) = 122.545\; \rm g \cdot mol^{-1}\), meaning that the mass of one mole of \(\rm KClO_3\!\) formula units would be \(122.545\; \rm g\!\).

The mass of this \(\rm KClO_3\!\!\) sample is \(m(\mathrm{KClO_3}) = 73.56\; \rm g\). The number of moles of formula \(\rm KClO_3\!\) units in this sample would be:

\(\begin{aligned}n(\mathrm{KClO_3}) &= \frac{m(\mathrm{KClO_3})}{M(\mathrm{KClO_3})} \\ &= \frac{73.56\; \rm g}{122.545\; \rm g \cdot mol^{-1}} \approx 0.6003\; \rm mol\end{aligned}\).

To know the exact number of mole of potassium (K) in 73.56 g of potassium chlorate (v), KClO₃ do the following:

Determination of the number of mole in 73.56 g of potassium chlorate (v), KClO₃

Mass of KClO₃ = 73.56 g

Molar mass of KClO₃ = 39 + 35.5 + (16×3)

= 39 + 35.5 + 48

= 122.5 g/mol

\(Mole =\frac{mass}{molar mass}\\\\Mol KClO_{3} = \frac{73.56}{122.5}\)

Determination of the number of mole of potassium, K in 0.6 mole (i.e 73.56 g) of KClO₃

Considering the molecular formula of potassium chlorate (v), KClO₃, we can see that:

1 mole of KClO₃ contains 1 mole of K.

Therefore, 0.6 mole of KClO₃ will also contain 0.6 mole of K.

Therefore, we can conclude that 73.56 g of KClO₃ contains 0.6 mole of potassium, K.

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Answer:

You can separate flour and rice using a sieve, but you won't be able to separate all of the flour from the rice since the flour is too small to see.

Explanation:

.

Answer:

lose; positive

Explanation:

Answer:

True

Explanation:

Answer:

Crystals form in nature when molecules gather to stabilize when liquid starts to cool and harden. This process is called crystallization and can happen when magma hardens or when water evaporates from a natural mixture too. Many crystals start small but as more atoms join and create a uniform and repetitive pattern, the crystal grows. This is how crystals are formed in nature.

Explanation:

When placed at the same temperature, the entropy of 10 mole of Ar(g) at 10.0 atm and the 10 mole of Ar(g) at 0.5 atm. The system has a higher entropy is 10 mole of Ar(g) at 0.5 atm.

The entropy is the measure the randomness of the of the system.  the measure of the system's thermal energy per unit the temperature that is not available for doing the useful work.

The Entropy will increases with temperature at the constant pressure. The  pressure increases leads to the higher degree of the order in the molecular arrangement. so, the entropy decreases with the increasing pressure.

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Answer:

The three compounds are different compounds

Explanation:

The mass of Nitrogen that combines with 1 gram of Oxygen in  Compound A = 1.750 g

The mass of Nitrogen that combines with 1 gram of Oxygen in  Compound B  = 0.8750 g

The mass of Nitrogen that combines with 1 gram of Oxygen in  Compound C  = 0.4375 g

According to the law of multiple proportions, when atoms of two different elements react to form compounds, the masses of one of the elements that combines with a fixed mass of the other element are in small whole number ratios.

The ratio of the masses are;

Mass of Nitrogen in Compound B/(Mass of Nitrogen in Compound C =  0.8750/0.4375 = 2

Mass of Nitrogen in Compound A/(Mass of Nitrogen in Compound C =  1.750/0.4375= 4

Mass of Nitrogen in Compound A/(Mass of Nitrogen in Compound B =  1.750/0.8750= 2

Given that the masses of Nitrogen in the three compounds are in small whole number ratios, the three compounds, Compound A, Compound B, and Compound C are different compounds.

Step 1

The reaction must be completed and balanced as follows:

C3H8 + 5 O2 => 3 CO2 + 4 H2O

-------------

Step 2

Information provided:

20.0 g of C3H8

10.0 g of O2

----

Information needed:

1 mole of C3H8 = 44.1 g

1 mole of O2 = 32.0 g

(use your periodic table please)

-------------

Step 3

By stoichiometry,

C3H8 + 5 O2 => 3 CO2 + 4 H2O

44.1 g C3H8 ---------- 5 x 32.0 g O2

20.0 g C3H8 ---------- X

X = 20.0 g C3H8 x 5 x 32.0 g O2/44.1 g C3H8

X = 72.6 g O2

For 20.0 g of C3H8, 72.6 g of O2 is needed, but there is only 10.0 g of O2.

Therefore,

Answer:

The limiting reactant = O2

The excess = C3H8

I don't know

Explanation:

because it does not give an question

Answer:

I don't have a paper right now so I am attaching images for b(i), (ii) and c(i)

Explanation:

c) Ionic bond is the result of strong electrostatic force of attraction between positively charged metal ion and negatively charged metal ion.

Answer:

Hope the above picture might help you :)

Answer:

Community health is a branch of public health which focuses on people and their role as determinants of their own

The pH of a solution with a hydronium ion concentration of 3.4x10⁻² M is approximately 1.5.

pH is a logarithmic scale that measures the acidity or basicity of a solution. It is defined as the negative logarithm (base 10) of the hydronium ion concentration (H₃O⁺). The pH scale ranges from 0 to 14, where values below 7 indicate acidic solutions, values above 7 indicate basic solutions, and a pH of 7 represents a neutral solution.

To calculate the pH of a solution with a hydronium ion concentration of 3.4x10⁻² M, you can follow these steps:

Step 1: Take the negative logarithm (base 10) of the hydronium ion concentration:

pH = -log10(3.4x10⁻²)

Step 2: Simplify the logarithm expression:

pH = -log10(3.4) + log10(10⁻²)

Step 3: Evaluate the logarithm of 3.4 using a calculator:

pH ≈ -0.531 + log10(10⁻²)

Step 4: Since log10(10⁻²) equals -2, simplify further:

pH ≈ -0.531 - 2

Step 5: Add the numbers to get the final result:

pH ≈ -2.531

Therefore, the estimated pH of the solution with a hydronium ion concentration of 3.4x10⁻² M is approximately 2.53. Note that this is an estimation, and the actual pH may vary slightly depending on the precise calculation and rounding.

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Answer:

It has a high frequency

Explanation:

The percent by mass of styrene in ABS plastic is 73.55%.

The percent by mass of styrene in the polymer is calculated as follows:.

moles of Br2 used:

Moles of Br₂ = mass of Br₂ used / molar mass of Br₂

Moles of Br₂ = 1.56 g / 159.80 g/mol

Moles of Br₂ = 0.00977 mol

moles of butadiene:

Moles of butadiene = Moles of Br₂

Moles of butadiene = 0.00977 mol

The mass of butadiene:

Mass of butadiene = Moles of butadiene × molar mass of butadiene

Mass of butadiene = 0.00977 mol × 54.10 g/mol

Mass of butadiene = 0.529 g

The mass of styrene:

Mass of styrene = Total mass of ABS plastic - Mass of butadiene

Mass of ABS plastic = 2.00 g

Mass of styrene = 2.00 g - 0.529 g

Mass of styrene = 1.471 g

The percent by mass of styrene:

The percent by mass of styrene = (Mass of styrene / Total mass of ABS plastic) × 100

Percent by mass of styrene = (1.471 g / 2.00 g) × 100

Percent by mass of styrene = 73.55%

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Using  hypothetical scenario, the Separation of  the Pennie’s are given below

Pennies dated after 1982 are lighter and thinner because zinc is less dense than copper. However, they have a similar diameter of 19.05mm to pennies dated before 1982. The difference in composition between the two groups is important because copper is a valuable metal, and the cost of producing a penny exceeded its value. By reducing the amount of copper in pennies, the U.S. Mint was able to save money on production costs.

Pennies dated before 1982 are made of 95% copper and 5% zinc and weigh 3.11 grams. They have a diameter of 19.05mm and a thickness of 1.55mm. Pennies dated after 1982 are made of 97.5% zinc and 2.5% copper and weigh 2.5 grams. They have a diameter of 19.05mm and a thickness of 1.52mm.

Therefore, the main difference between the two groups is their composition, weight, and thickness. The pennies dated before 1982 are larger, heavier, and thicker than those dated after 1982.

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This is a perfect answer

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The concentration of cyclopropane after 234 s is 3.70M, using formula of half life.

As indicated by units of k, this is a first order reaction.

We can use the integrated rate law \([A] = [A]_{0} e^{-kt}\)or we can use half life.

First order half life = 0.693/k = 0.693/6.7x10-4 s-1

1034s = \(t\frac{1}{2}\)

number of half lives elapsed =234sec x 1 half life/1034 sec = 0.226 half lives elapsed

Fraction remaining = \(0.5^{n}\)

where n is half lives elapsed

Fraction remaining = \(0.5^{0.226}\)

Fraction remaining = 0.855

Concentration remaining = 4.33 M x 0.855 = 3.70 M

Therefore, concentration of cyclopropane after 234 s is 3.70M, using formula of half life.

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They tell us that the pressure of the gas is constant and the temperature and volume vary. If we assume that the gas behaves like an ideal gas, we can apply Charles's law, which tells us:

where,

V1 is the initial volume, 3.62L

T1 is the initial temperature, 21.6°C=294.75K

V2 is the final volume, 3.45L

T2 is the final temperature, in Kelvin

Now, we clear T2 and replace the known data:

The temperature at which the volume of the gas is 3.45 L will be 281K

Answer. b) 281K

Answer:

i think its A but im not sure. Hope this helps

The nonrenewable energy source among the options provided is fossil fuel energy, option C is correct.

Fossil fuels, such as coal, oil, and natural gas, are derived from ancient organic matter that has been buried and transformed over millions of years. These resources are finite and cannot be replenished within a human lifespan. Additionally, their combustion releases carbon dioxide and other greenhouse gases, contributing to climate change and air pollution.

Solar energy, wind energy, tidal energy, and geothermal energy are renewable sources of energy. They rely on naturally replenishing resources like sunlight, wind, tides, and heat from the Earth's core, making them sustainable and environmentally friendly alternatives to fossil fuels, option C is correct.

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The complete question is:

Which of the following energy sources is considered nonrenewable?

A. solar energy

B. wind energy

C. fossil fuel energy

D. tidal energy

E. geothermal energy

The given chemical equation is, 2KOH(aq) + H2SO4(aq) → K2SO4 + 2H2O(aq) + nrIt is necessary to write the given chemical equation in the molecular form to get the main answer. The complete balanced molecular chemical equation for the given reaction is;2KOH(aq) + H2SO4(aq) → K2SO4 + 2H2O(aq)In order to obtain the net ionic equation, first, we need to find the state of each element given in the chemical equation.

The given chemical equation is,2KOH(aq) + H2SO4(aq) → K2SO4 + 2H2O(aq)KOH(aq) and H2SO4(aq) are both strong electrolytes, which means that they are completely ionized in the aqueous solution. Now, let's write the dissociation reaction for KOH(aq) and H2SO4(aq).KOH (aq) → K+(aq) + OH-(aq)H2SO4 (aq) → 2H+(aq) + SO4-2(aq)The reaction shows that KOH dissociates into potassium ions, K+(aq), and hydroxide ions, OH-(aq), while H2SO4 dissociates into hydrogen ions, H+(aq), and sulfate ions,

SO4-2(aq).Now, we need to balance the ionic equation by following the rules given below:(i) Cancel out the spectator ions which are present on both sides of the equation.(ii) Write the remaining ions separately as a product.In the given reaction, K+(aq) and SO4-2(aq) are the spectator ions as they are present on both sides of the equation. Therefore, they are canceled out. The balanced net ionic equation is:H+ (aq) + OH- (aq) → H2O(l)OH-(aq) and HSO4-(aq) are the reactants in the net ionic equation.The net ionic equation is 2H+ (aq) + SO4-2(aq) + 2OH- (aq) → 2H2O(l)The answer is "2H+ (aq) + SO4-2(aq) + 2OH- (aq) → 2H2O(l)".

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Answer:

Gas Pressure

Explanation:

Gas pressure is caused by the force exerted by gas molecules colliding with the surfaces of objects (Figure 5.2. 1). Although the force of each collision is very small, any surface of appreciable area experiences a large number of collisions in a short time, which can result in a high pressure.

Answer:

Collisions

Explanation:

It says that it was the answer.

Answer:

The EF of the compound is CH2O and the MF is C6H12O6.

Explanation:

To find the empirical formula (EF) of the compound, we need to determine the simplest whole number ratio of the atoms in the compound. We can assume we have 100 g of the compound, which means we have:

40 g of carbon

6.67 g of hydrogen

53.33 g of oxygen (since the rest of the compound is oxygen)

Next, we can convert the masses to moles:

Moles of carbon = 40 g / 12.01 g/mol = 3.33 mol

Moles of hydrogen = 6.67 g / 1.01 g/mol = 6.61 mol

Moles of oxygen = 53.33 g / 16.00 g/mol = 3.33 mol

We then divide each of the mole values by the smallest number of moles, which is 3.33, to get the simplest whole number ratio:

Carbon: 3.33 / 3.33 = 1

Hydrogen: 6.61 / 3.33 = 1.98 (rounded to 2)

Oxygen: 3.33 / 3.33 = 1

So the EF of the compound is CH2O.

To find the molecular formula (MF), we need to know the molecular mass of the EF. The empirical formula mass (EFM) of CH2O is:

EFM = (1 x 12.01 g/mol) + (2 x 1.01 g/mol) + (1 x 16.00 g/mol) = 30.03 g/mol

We can then calculate the molecular formula mass (MFM) by dividing the given molecular mass (180 g/mol) by the EFM:

MFM = 180 g/mol / 30.03 g/mol = 6

This means the MF is 6 times the EF, or C6H12O6. Therefore

Answer:       H

               H- C- H

                    H

Explanation:

Lewis structures are the structures which represent the valence electrons of the element around the chemical symbol of the element.

Carbon is an element which belong to group 14. Atomic number of carbon is 6 that means it contains 6 electrons, Thus the electronic configuration is represented as: \(1s^22s^22p^2\) . Thus the valence electrons are 4.

Hydrogen is an element which belong to group 1. Atomic number of hydrogen is 1 that means it contains 1 electron, Thus the electronic configuration is represented as: \(1s^1\) . Thus the valence electron are 1.

The four valence electrons of carbon are shared with one valence electron of hydrogen each.

Answer:

An impure substance

Explanation:

Substance means: hard surface example: salt,corals,coal.

Answer:

silicon

Explanation:

Carbon and silicon BOTH come from Group 14 of the Periodic Table , i.e. both formally have the same number of valence electrons, 4 such electrons

Answer:

silicon

Explanation:

Carbon and silicon both come from Group 14 of the Periodic Table

Answer: 2,090J

The equation to find the specific heat is determined by the equation q = mcΔT, where q = total heat, m=mass, c = specific heat, and ∆T change in temperature.

Recall that the specific heat capacity for water is 4.18J/gºC

So, plug this along with your specific values into the equation.

q = 100g * (4.18J/gºC) * (20.0ºC-15.0ºC)
q = 2090J