The empirical formula of the compound is NH₂, indicating one mole of nitrogen and two moles of hydrogen in the simplest whole number ratio.
Determining the empirical formula:
1. Set up the equations:
Let x be the mass of nitrogen (N) in the compound.
Let y be the mass of hydrogen (H) in the compound.
We know the total mass of the compound is 3.42 g: x + y = 3.42 g (Equation 1).
2. Balance the combustion reactions:
The combustion of nitrogen forms nitrogen dioxide (NO₂): N + O₂ → NO₂.
The combustion of hydrogen forms water (H₂O): 2 H + 1/2 O₂ → H₂O.
3. Use the combustion reactions to calculate the mass of nitrogen:
From the first combustion reaction, we can relate the mass of NO₂ to the mass of N:
9.82 g NO₂ * (1 mol NO₂ / 46 g NO₂) * (1 mol N / 1 mol NO₂) * (14 g N / mol) = x
This simplifies to x = 2.989 g N.
4. Calculate the mass of hydrogen:
Subtract the mass of nitrogen from the total mass to find the mass of hydrogen: y = 3.42 g - 2.989 g = 0.4313 g H.
5. Convert mass to moles:
Divide the mass of each element by its atomic mass to get the number of moles:
N: 2.989 g / 14 g/mol = 0.2135 mol
H: 0.4313 g / 1 g/mol = 0.4313 mol
6. Find the simplest whole number ratio of moles:
Divide both the number of moles by the smallest number of moles (0.2135 mol for nitrogen in this case):
N: 0.2135 mol / 0.2135 mol = 1
H: 0.4313 mol / 0.2135 mol ≈ 2
7. Write the empirical formula:
Based on the whole number ratio of moles, the empirical formula is NH₂.
Final answer:
The combustion analysis of a nitrogen and hydrogen compound resulted in 9.82g of NO₂ and 3.85g of H₂O, leading to the calculation of moles of N and H and determination of the empirical formula as NH₂.
Explanation:
To determine the empirical formula of the compound containing only nitrogen and hydrogen from the combustion results, we will follow a step-by-step process:
Calculate the moles of NO₂ and H₂O produced from the combustion.Deduce the moles of N and H in the original compound using the stoichiometry of the combustion reaction.Find the simplest whole number ratio of moles of N to H to determine the empirical formula.First, we convert the mass of NO₂ and H₂O to moles:
9.82 g NO₂ / 46.0055 g/mol (molar mass of NO₂) = ~0.2134 moles of NO₂.3.85 g H₂O / 18.01528 g/mol (molar mass of H₂O) = ~0.2138 moles of H₂O.Next, we use the moles of NO₂ to find moles of N (one N atom per molecule of NO₂) and the moles of H₂O to find moles of H (two H atoms per molecule of H₂O):
0.2134 moles NO₂ → 0.2134 moles of N.0.2138 moles H₂O → 2 * 0.2138 = 0.4276 moles of H.Finally, we compare the mole ratio of H to N, which gives roughly 2:1 ratio, indicating that the empirical formula of the compound is NH₂.
A block of aluminum occupies a volume of 15.0 mL and weighs 40.5 g. What is it’s density?
The density of a substance is calculated by dividing its mass by its volume. For the aluminum block in question, its density is calculated by dividing its mass (40.5 g) by its volume (15.0 mL), yielding a density of 2.7 g/mL.
Explanation:The subject of this question is density, which is a property of matter defined as mass per unit volume. In this case, you have been given the mass of the aluminum block (40.5 g) and its volume (15.0 mL). To find the density, we simply divide the mass by the volume.
The formula we use is: Density = Mass/Volume.
Therefore the density of the block is 40.5 g divided by 15.0 mL, which results in a density of 2.7 g/mL. So, the density of the aluminum block is 2.7 g/mL.
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how many elements in CuSO4
Franklin ordered 6 boxes of popsicles for a pool party. each box had 20 popsicles. there will be 50 guests at the party. which can we use to find the number of popsicles (p) each person can have if they are divided equally between the guests
Answer:
ok so the answer is 6×12÷24= THE Answer if u were look for this
Explanation:
SO IN KHAN I DID IT AND I GOT IT RIGHT
THX PERSON
Hydrocarbon with empirical formula c3h8
The hydrocarbon with the empirical formula C3H8 is Propane, a saturated hydrocarbon that belongs to the alkane family.
Explanation:The hydrocarbon with an empirical formula of C3H8 is Propane. The empirical formula provides the simplest, reduced ratio of elements within a compound. In the case of C3H8, this represents 3 carbon atoms to 8 hydrogen atoms, which is the formula for propane. Propane is a member of the alkane family of hydrocarbons, which are characterized by single bonds between the carbon and hydrogen atoms, therefore classified as saturated hydrocarbons.
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Sodium has more valence electrons than magnesium. True or False
Is the following chemical equation balanced? 2Na + 2H2O 2NaOH + H2
yes because you have 2 H 2Na 2O on both sides
Answer : Yes, the given chemical reaction is balanced equation.
Explanation :
Balanced chemical reaction : It is defined as the number of atoms of individual elements present on reactant side must be equal to the product side.
The given chemical reaction is,
[tex]2Na+2H_2O\rightarrow 2NaOH+H_2[/tex]
In this reaction, there are 2 atoms of sodium, 4 atoms of hydrogen and 2 atoms of oxygen are present on both side of the reaction. So,
This chemical reaction is a balanced reaction because in this reaction, the number of atoms of sodium, hydrogen and oxygen are balanced on the side of the reaction.
Hence, yes the given chemical reaction is balanced equation.
The sales tax rate is 8%. If Jim bought a new Buick and paid a sales tax of $1,920, what was the cost of the Buick before the tax?
Answer:
$24000
Explanation:
We are given that
Sales tax=8%
Sales tax amount=$1920
We have to find the cost of the Buick before the tax.
Let x be the cost of Buick before the tax.
According to question
8% of x=1920
[tex]\frac{8}{100}\times x=1920[/tex]
[tex]x=\frac{1920}\times \frac{100}{8}[/tex]
[tex]x=24000[/tex]
Hence, the cost of the Buick before the tax=$24000
what happens when an electron falls to a lower energy level?
When an electron falls to a lower energy level, a photon is emitted representing the energy difference between the higher and the lower state. This process is a fundamental aspect in atomic physics and basis of many light effects.
Explanation:When an electron falls to a lower energy level, energy is released. This energy transition is represented as an emitted photon, a packet of electromagnetic energy. Based on Bohr's model, a hydrogen atom is most stable in its ground state, when an electron is in its lowest energy orbit. An atom can absorb energy, causing an electron to shift to a higher energy level, or an excited state. However, an atom usually exists in the excited state for a brief period before the electron naturally transitions back to a lower energy level, or ground state. During this decline, a photon of specific wavelength is emitted, accounting for the energy difference between initial and final energy levels.
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What is the 3rd noble gas
give the number of protons, electrons, and neutrons in the following atoms a. 90Zr b. 202Hg c. 58Ni d.222Rn
Answer:
are those numbers the atomic mass?
Explanation:
The number of protons, neutrons, and electrons for the atoms Zr, Hg, Ni, and Rn correspond to their atomic numbers and mass numbers, with Zr having 40 of each proton and electron and 50 neutrons, Hg with 80 of each proton and electron and 122 neutrons, Ni with 28 of each proton and electron and 30 neutrons, and Rn with 86 of each proton and electron and 136 neutrons.
To determine the number of protons, neutrons, and electrons in an atom, you need to know its atomic number (which is the same as the number of protons and electrons in a neutral atom) and its atomic mass number (which is the sum of protons and neutrons). Here's how to calculate them for each of the given isotopes:
Zirconium (Zr), with an atomic number of 40 (90Zr), has 40 protons, 40 electrons, and 50 neutrons (90-40).
Mercury (Hg), with an atomic number of 80 (202Hg), has 80 protons, 80 electrons, and 122 neutrons (202-80).
Nickel (Ni), with an atomic number of 28 (58Ni), has 28 protons, 28 electrons, and 30 neutrons (58-28).
Radon (Rn), with an atomic number of 86 (222Rn), has 86 protons, 86 electrons, and 136 neutrons (222-86).
How high in meters must a column of glycerol be to exert a pressure equal to that of a 760-mm column of mercury? The density of glycerol is 1.26g/mL, whereas that of mercury is 13.6g/mL.
a substance that has a definite shape and volume is a
A solid
B liquid
C gas
D fluid
calculate the percentage of a solution formed by dissolving 10g of glucose in 240g of water
What is an astronomical unit? Why is this unit used to measure distances in the solar system?
Compounds may be represented by chemical formulas. In the chemical formula for water which is H20, the 2 which represents the number of hydrogen atoms is called_______?
A) the reactant.
B) the subscript.
C) the coefficient.
D) the atom factor.
what is the density of object with volume of 20 ml and a mass of 5 grams?
How many grams of O are in 585 g of Li2O
The amount of oxygen in 585 g of Li2O is calculated using the molar mass of Li2O and the proportion of oxygen's molar mass to Li2O's molar mass, then multiplied by the total mass of Li2O.
Explanation:To determine how many grams of oxygen are in 585 grams of Li2O, we use the molar mass of Li2O and the molar mass of oxygen. The molar mass of Li2O (lithium oxide) is the sum of the mass of two lithium atoms and one oxygen atom. One mole of Li2O weighs approximately 29.88 g/mol (2 x 6.94 + 16.00), and one mole of oxygen weighs 16.00 g/mol.
To find the mass of oxygen in Li2O:
First, find the moles of Li2O in 585 g: Moles of Li2O = 585 g / 29.88 g/molNext, find the grams of oxygen in that amount of Li2O moles using the molar mass of oxygen: 16.00 g/mol.Multiply the moles of Li2O by the molar mass of oxygen.Therefore, to calculate the exact grams of oxygen in 585 g of Li2O, you use the proportion of oxygen's molar mass to Li2O's molar mass, which is 16.00/29.88. Multiply this by the given mass of Li2O to find the mass of just the oxygen part:
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To determine the grams of oxygen in 585 g of Li₂O, first calculate the molar mass of Li₂O, find the number of moles in 585 g, and then convert the moles of oxygen to grams. The final result is 335.84 grams of oxygen.
To find the number of grams of oxygen in 585 g of Li₂O, we need to follow these steps:
Determine the molar mass of Li₂O by summing the atomic masses of its elements: Lithium (Li) has an atomic mass of 6.94 g/mol and Oxygen (O) has an atomic mass of 16.00 g/mol. Thus, the molar mass of Li₂O is: (2 * 6.94 g/mol) + 16.00 g/mol = 27.88 g/mol.Calculate the number of moles of Li₂O in 585 g: Number of moles = Mass / Molar Mass = 585 g / 27.88 g/mol = 20.99 moles of Li₂O.Since there is 1 mole of oxygen in each mole of Li₂O, there are 20.99 moles of O in 20.99 moles of Li₂O.Convert moles of O to grams by multiplying the number of moles by the atomic mass of O: Mass of O = Number of moles * Atomic Mass = 20.99 moles * 16.00 g/mol = 335.84 g.Therefore, there are 335.84 grams of oxygen in 585 grams of Li₂O.
how many total atoms are in CuSO4
Which description is not a property of an acid? A turns litmus paper red B bitter taste C corrosive D dissolve metals
Answer:
Bitter Taste
Explanation:
Acids have a sour taste and Bases have a Bitter taste. Acids turn litmus paper red because their pH level is less than 7. They are corrosive and can break down materials. They can also dissolve metals. Hope this helped ú⩊ù
In the following reaction, the sodium and chlorine are ____. 2NaCl->2Na + Cl^2
Answer : The sodium and chlorine are the products.
Explanation :
Balanced chemical reaction : It is defined as the reaction in which the number of atoms of individual elements present on the reactant side must be equal to the product side.
The given balanced chemical reaction is,
[tex]2NaCl\rightarrow 2Na+Cl_2[/tex]
In the balanced chemical reaction, the species present on the left side of the reaction is known as reactant and the species present on the right side of the reaction is known as product.
From this we conclude that, the sodium, [tex]Na[/tex] and chlorine, [tex]Cl_2[/tex] are the products and sodium chloride, [tex]NaCl[/tex] is the reactant.
Hence, the sodium and chlorine are the products.
Why is it important to dispose of wastes from nuclear power plants carefully? A) The wastes cause the greenhouse effect. B) The wastes are radioactive and could cause cancer. C) The wastes do not decompose and take up a lot of space. D) The wastes flow into ponds and lakes and cause algal bloom.
Which of the following techniques can be used to separate a homogeneous mixture into its component parts?
Sort by color
Sort by size
Separation by density
Use magnetism
The right is Separation by density .
Take the blood which is a good example of a heterogeneous mixture.
Blood is a vital liquid in our body, which transports oxygen from the air to our lungs so we can breathe. It is also used to eject wastes, such as carbon dioxide, to bring cells and molecules of the immune system to the tissues, and to spread hormones throughout the body. It corresponds to plasma, red blood cells, white blood cells, platelets and hemoglobins combined.
In medical tests centrifugal force is used to separate the different components of the blood.
In general, the centrifugation will allow to separate and analyze the different components of the blood, to know if the rate of white blood cells in the blood of a patient, for example, is normal, and therefore to know if his system Immune is integrity.
Under the action of centrifugal force, the solid components in the blood are drawn to the bottom of the tube in which the blood is contained. The centrifugal force then acts as an accelerated settling. It separates plasma from red blood cells and white blood cells.
Answer:
The answer is seperation by density! Hope this helped
Explanation:
science question down below
Why do organisms need to maintain homeostasis
Organisms maintain homeostasis to ensure the optimal functioning of cellular processes, enabling them to adapt to various environmental conditions and maintain internal stability necessary for survival.
Explanation:Organisms need to maintain homeostasis to ensure that their cellular processes occur under optimal conditions. Through homeostasis, organisms maintain internal equilibrium by adjusting biological processes, despite external environmental changes. This is vital for survival, as it enables cells to function correctly and supports overall health and stability.
For example, thermoregulation is a form of homeostasis that helps organisms regulate their body temperature. Polar bears have adapted to cold climates with features like fur and blubber to conserve heat, while in hot climates, humans perspire and dogs pant to release excess body heat.
Furthermore, organisms use feedback mechanisms to regulate growth, reproduction, and to maintain a dynamic homeostasis. These mechanisms provide a way to respond and adjust to changes, ensuring that internal conditions remain within a narrow, favorable range.
Why is the air warmer than the water in a pool on a hot sunny morning? due to surface tension because of water’s specific heat because of capillary action due to water’s solvent properties
The air is warmer than the pool water because water has a high specific heat, requiring more energy to increase its temperature than air does. Option B is correct.
Specific heat is the amount of energy required to raise the temperature of a substance. Water has a high specific heat, which means it takes more energy to increase its temperature compared to air. This property allows water to absorb a lot of heat without a significant rise in temperature, hence it often feels cooler than the air on a sunny day.
Furthermore, it's also worth noting that this high specific heat of water plays a crucial role in Earth's climate and helps to moderate temperatures.
Hence, B. is the correct option.
The complete question is:
Why is the air warmer than the water in a pool on a hot sunny morning?
A) due to surface tension
B) because of water’s specific heat
C) because of capillary action
D) due to water’s solvent properties
Matt did an experiment to study the solubility of two substances. He poured 100 mL of water at 20 °C into each of two beakers labeled A and B. He put 50 g of Substance A in the beaker labeled A and 50 g of Substance B in the beaker labeled B. The solution in both beakers was stirred for 1 minute. The amount of substance left undissolved in the beakers was weighed. The experiment was repeated for different temperatures of water and the observations were recorded as shown.
Experimental ObservationsSubstance Mass of Undissolved Substance at Different Temperatures (gram)
20 °C 40 °C 60 °C 80 °C
A 50 50 50 50
B 10 8 5 2
Part 1: Which, if any, substance is soluble in water?
Part 2: Explain how the data helped you determine solubility for both substances for temperatures 20 °C to 80 °C.
Part 1 : Answer is only B substance is soluble in water.
In this experiment undissolved mass of each substance was measured. According to the given data, undissolved mass of substance B at 20 °C is 10 g while A is 50 g. Since, the initial added mass of each substance is 50 g, we can see that substance A is not soluble in water since the undissolved mass is 50 g.
Part 2 : Substance A is not soluble in water and substance B is soluble in water.
According to the given data, the undissolved mass of substance A remains as same as initial added mass, 50 g throughout the temperature range from 20 ° to 80 °C. Hence, we can conclude that substance A is not soluble in water.
But, according to the data, undissolved mass of substance B at 20 °C is 10 g. That means, 40 g of substance B was dissolved in water. When the temperature increases the undissolved mass of substance B decreases. Hence, we can conclude that substance B is soluble in water and solubility increases with temperature.
what organelle is found in paramecia cell but not plant cells
Transport of glucose enters a liver cell through a protein Chanel
Josie bought a soda and 2 candy bars the soda cost $1.10 her bill was $2.40. how much was her candy bar?
WHAT ARE NEWTON'S 3 LAW'S
Final answer:
Newton's three laws of motion are fundamental principles in classical mechanics, explaining how objects behave under various forces. The first law, or law of inertia, says objects maintain their state of motion unless acted upon by an external force. The second law relates force, mass, and acceleration, while the third law states that every action has an equal and opposite reaction.
Explanation:
Isaac Newton's three fundamental laws of motion form the basis for classical mechanics, describing the relationship between a body and the forces acting upon it. The laws are integral to our understanding of interactions and forces in physics.
Newton's first law, also known as the law of inertia, asserts that an object at rest will stay at rest, and an object in motion will stay in motion at a constant velocity unless acted upon by an external force. Newton's second law advances this concept by stating that the acceleration of an object is directly proportional to the net force acting upon it and inversely proportional to its mass. Lastly, Newton's third law establishes that for every action, there is an equal and opposite reaction, meaning that forces between two interacting objects are equal in magnitude and opposite in direction.