How many grams of N2O, nitrous oxide, are contained in 500. mL of the
gas at STP?

Answer:430 mg/L = 0.43g/L 

Explanation:

Answer:

( The atomic bonds)

the chemical formal indicates the atomic bonds of its constituent ions .

The structural formula which represents a nonpolar symmetrical molecule is CH₄ (methane). Option 2 is correct.

Methane is a tetrahedral molecule with four hydrogen atoms surrounding a central carbon atom. Each hydrogen atom is bonded to the carbon atom by a single covalent bond, and all four hydrogen atoms are arranged symmetrically around the carbon atom, resulting in a nonpolar molecule.

On the other hand, NH₄ (ammonium ion) and H₂O (water) are polar molecules. NH₄ has a positive charge on the nitrogen atom, and the hydrogen atoms are arranged tetrahedrally around it, making it a polar molecule. H₂O has a bent or V-shaped molecular geometry with two lone pairs of electrons on the oxygen atom, resulting in an uneven distribution of charge and making it a polar molecule as well.

Hence, 2. is the correct option.

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Answer:

14.9 mol

Explanation:

To find the number of moles in a given mass of a sample of sodium chloride (NaCl), we can multiply the number of grams in the sample by the molar mass of sodium chloride, which is 58.44 g/mol.

871 g × (1 mol / 58.44 g)

= 871/58.44 mol

≈ 14.9 mol

Note that we rounded to 3 significant figures in the final answer because that is how many significant figures were given in the mass measurement of the sodium chloride sample.

Answer:

solution

Explanation:

Answer:

The additional concentration of nitrogen in the river water due to the farmer's fertilizer is 0.0629 milligrams per liter

Explanation:

The mass of the fertilizer the farmer applies = 1705 kg

The percentage of nitrogen contained in the fertilizer = 10%

Therefore;

The mass of nitrogen contained in the fertilizer = 10% of 1705 kg = 10/100 × 1705 kg

The mass of nitrogen contained in the fertilizer = 10/100 × 1705 kg = 170.5 kg

The percentage of the fertilizer that washes into the river that runs through the farm = 15.0%

The mass of the fertilizer that washes into the river = 15/100 × 170.5 = 25.575 kg = 25575 g = 25575000 mg

The volume of water that flows through the farm = 0.455 cubic feet per second

The volume of water that flows through the farm in a year = 0.455 ft³ × 60 × 60 × 24 × 365 = 14348880 ft³ = 406,315.03 m³ = 406,315,034 l

The number of moles of nitrogen = Mass of nitrogen/(Molar mass of nitrogen)

Molar mass of nitrogen =14.0067 g/mol

Therefore;

The number of moles of nitrogen = 25575 kg/(14.0067 g/mol) = 1.825.912 moles

The additional concentration of the nitrogen in moles = 1.825.912 moles/(406,315,034 l) = 4.49 ×   10⁻⁶ mol/liter

The additional concentration of the nitrogen in milligrams of nitrogen per liter of water = 25575000/406,315,034 = 0.0629 milligrams of nitrogen per liter.

Therefore, the additional concentration of nitrogen in the river water due to the farmer's fertilizer = 0.0629 milligrams per liter

Answer: Kilograms

Explanation: Milliliters and Kilometers are the wrong unit of measurement, and Milligrams are too small. Kilograms would be most appropriate to measure the weight of a heavy animal.

3 MnO\(_4\)⁻ + 2N\(_2\)O\(_3\)  + 2H\(_2\)O → 3Mn²⁺ + 2 NO\(_3\)⁻ + 6 OH⁻ is the balanced redox reaction in the basic condition.

Any chemical process in which a participating chemical species' oxidation number changes is known as an oxidation-reduction reaction, often known as a redox reaction. The phrase refers to a broad range of processes. Numerous oxidation-reduction processes are as frequent and well-known as fire, metal corrosion and disintegration, fruit browning, respiration, and photosynthesis—basic life processes.

3 MnO\(_4\)⁻ + 2  N\(_2\)O\(_3\) + 6 H⁺ + 6 OH⁻ → 3Mn²⁺ + 2 NO\(_3\)⁻  + 4 H\(_2\)O + 6 OH⁻

3 MnO\(_4\)⁻+ 2 N\(_2\)O\(_3\) + 6 H\(_2\)O → 3 Mn²⁺ + 2 NO\(_3\)⁻  + 4 H2O + 6OH⁻

3 MnO\(_4\)⁻ + 2N\(_2\)O\(_3\)  + 2H\(_2\)O → 3Mn²⁺ + 2 NO\(_3\)⁻ + 6 OH⁻

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Answer:

Black and Textured

Explanation:

Dark colors absorb more energy than light colors, and reflect less energy than light colors.

Rough surfaces absorb more energy than smooth surfaces, and reflect less energy than smooth surfaces.

The kind of material that would best accomplish the aforementioned task of warmth is: A. black and textured.

Radiation can be defined as the transfer of energy in the form of waves particles through a material medium or space. Thus, radiation is typically a type of heat transfer which causes a person residing on planet Earth and sitting under the Sun (solar energy) to feel warm.

In this scenario, the kind of material that would best accomplish the task of warming the house by maximizing the absorption of solar energy is a  black and textured material because it absorb more energy while reflecting less energy than bright and smooth materials.

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A hypothesis is a proposed explanation or prediction based on limited evidence or observations, which can be tested through further investigation or experimentation. It should be specific, testable, and based on existing knowledge.

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Answer:

b.Rearrange the two equations to make each variable the focus (you will end up with three variations for each equation).

Answer:

one from each parent

Explanation:

The concentration of LiOH in the reaction is 0.103 M

This is a neutralization reaction and the equation of the reaction is written as; H2SO4(aq) + 2LiOH(aq) ---->Li2SO4(aq) + H2O(l)

The average volume of acid used is obtained from;

8.54 + 8.51 + 8.68/ 3 = 8.58 mL

CA = 0.150 M

VA = 8.58 mL

CB = ?

VB= 25.0 mL

NA = 1

NB = 2

CAVA/CBVB = NA/NB

CAVANB = CBVBNA

CB = CAVANB/VBNA

CB = 0.150 * 8.58 * 2/25.0 * 1

CB = 0.103 M

The concentration of LiOH in the reaction is 0.103 M

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The order of a reaction is determined experimentally and describes the relationship between the rate of a reaction and the concentration of reactants, whereas the molecularity of a reaction is a theoretical concept that describes the number of molecules that participate in the rate-determining step of a reaction.

The order of a reaction is the mathematical representation of the relationship between the rate of a reaction and the concentration of reactants. It describes how the rate of a reaction changes with respect to the change in concentration of reactants.

The order of a reaction is determined experimentally by observing how the rate of a reaction changes as the concentration of reactants is varied while keeping the concentration of other reactants and conditions constant. The order of a reaction can be 0, 1, 2, or even a fraction.

The molecularity of a reaction ​is the number of reactant molecules that collide in a single step to form the product. The molecularity of a reaction can be unimolecular (1), bimolecular (2), or termolecular (3). It is important to note that not all reactions have a molecularity, as some reactions have multiple steps and multiple reactants involved.

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i think its B ........

Answer:

Combustion

Explanation: Because a reactant is reacting with O2.

To determine the empirical formula, we need to find the simplest whole number ratio of the atoms in the compound. Assuming we have a 100 g sample of the compound, we have 58.8 g C, 9.8 g H, and 31.4 g S.

We can then convert these masses into moles by dividing by their respective atomic masses:

58.8 g C / 12.01 g/mol = 4.9 mol C

9.8 g H / 1.01 g/mol = 9.7 mol H

31.4 g S / 32.06 g/mol = 1.0 mol S

Next, we need to find the simplest whole number ratio of these moles. We can do this by dividing each value by the smallest one:

4.9 mol C / 1.0 mol S = 4.9

9.7 mol H / 1.0 mol S = 9.7

1.0 mol S / 1.0 mol S = 1.0

The ratios are approximately 5:10:1, which can be simplified to 1:2:1. Therefore, the empirical formula for the compound is CH2S.

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Answer

mass of CO2 required = 60.5 g

Explanation

Given:

Molar mass of CO2 = 44 g/mol

Molar mass of O2 = 32 g/mol

Mass of O2 = 22 g

Required: Mass of CO2 needed to produce O2

Solution:

Step 1: Calculate the moles of O2

n = m/M where n is the moles, m is the mass and M is the molar mass

n = 22g/32g/mol

n = 0.6875 mol

Step 2: Find the moles of CO2 using stoichiometry

Molar ratio between CO2 and O2 is 2:1

Therefore moles of CO2 = 0.6875 mol x 2 = 1.375 mol

Step 3: Covert the moles of CO2 to mass

m = n x M

m = 1.375 mol x 44 g/mol

m = 60.5 g

Answer:0.0303495251

Explanation:

I know the answer looks weird.

If the answer is wrong then the formula for density is mass divided by volume.

Answer:

a) 2 (H+) ions

b) 1 (SO3²-) ions

c) 1.36 × 10^-22 grams.

Explanation:

According to this question, sulfurous acid has a chemical formula; H2SO3. It is made up of hydrogen and sulfite ion. Hydrogen ion (H+) is the cation while sulfite ion (SO32-) is the anion.

Based on the chemical formula, there are 2 moles of hydrogen ions that reacts with 1 mole of sulfite ion as follows:

2H+ + SO3²- → H2SO3

Hence;

- there are 2 hydrogen ions (2H+) present in H2SO3.

- there is 1 sulfite ion (SO3²-) present in H2SO3.

c) The mass of one formula unit of H2SO3 is calculated thus:

= 1.008 (2) + 32.065 + 15.999(3)

= 2.016 + 32.065 + 47.997

= 82.08 a.m.u

Since, 1 gram is = 6.02 x 10^23 a.m.u

82.08 a.m.u = 82.08/6.02 × 10^-23

= 13.6 × 10^-23

= 1.36 × 10^-22 grams.

The tire pressure (dependent variable) increases as the temperature increases (independent variable).

The two most important variables in a science experiment are independent and dependent variables.

The variable that the experimenter controls are the independent variable. The variable that adapts to the independent variable is known as the dependent variable. The two factors could be connected through cause and effect.

In an experiment, the dependent variable depends on the changes that occur in the independent variable.

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Answer:

the element air is the most similar to oxygen in chemical. and physical properties

Answer:

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

\(a = \frac{f}{m} \\ \)

f is the force

m is the mass

From the question we have

\(a = \frac{500}{50} = \frac{50}{5} = 10 \\ \)

We have the final answer as

Hope this helps you

The factor that  doesn’t change the resistance of a wire is pressure. option A.

Resistance is a conductor's capacity to thwart the passage of current. It is controlled by the interplay of the applied voltage and the electric current passing through it. The amount of opposition any object applies to the flow of electric current is referred to as resistance.

The ohm, a unit of measurement for resistance, is represented by the Greek letter omega. According to Ohm's law, the voltage across two places is precisely proportional to the current flowing through a conductor between them.

Hence option A is correct.

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missing part;

The pressure

The length of the resistor.

The thickness of the resistor.

The temperature of the conductor.

To find the density of the unknown piece of metal, we can use the formula:

Density = mass / volume.

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