How does the composition of a mixture of hydrogen and oxygen differ from the composition of a compound containing hydrogen and oxygen

Answers

Answer 1
Chemical compounds have chemically bonded molecules so that they exhibit different properties (i.e. chemical) compared to the individual molecules comprising the compound. Mixtures are simply the combinations of different molecules and compounds that are not chemically bonded together, and can therefore be separated by physical means. Mixtures usually retain the properties of its components. 

The hydrogen and oxygen molecules in a mixture do not form strong bonds between each other. The molecules of both gases are only contained in the same space or volume and the individual molecules retain their chemical properties. 

A compound containing hydrogen and oxygen molecules exhibit different chemical (and even physical) properties compared to the individual molecules themselves.

Water for example, is a compound with 2 hydrogen atoms and 1 oxygen atom, chemically-bonded together. Hydrogen gas is highly flammable, water is not. Oxygen gas is an essential reagent for combustion (or burning) reactions, water is not. 
 
Thus, throwing a lighted match to a gaseous mixture of hydrogen [tex] (H_{2}) [/tex] and oxygen [tex] (O_{2}) [/tex] would create fire, or even an explosion (since hydrogen is flammable and oxygen feeds the reaction). Throwing a match to water vapor [tex] (H_{2}O) [/tex] would not create fire. 

Related Questions

A 55.9 g sample of water at 99.2 °c is placed in a constant pressure calorimeter. then, 23.9 g of zinc metal at 21.1 °c is added to the water and the temperature drops to 96.9 °c. what is the specific heat capacity of the zinc metal measured in this experiment?

Answers

Heat capacity is the amount of heat required to raise the temperature of the system by 1 degree Celsius. Thus the specific heat capacity of zinc is 0.0071 calorie / (g °C).

What is Enthalpy?

Enthalpy term is basically used in thermodynamics to show the overall energy that a matter have. Mathematically, Enthalpy is directly proportional to specific heat capacity of a substances.

Mathematically,

Enthalpy=mass of solution ×specific heat capacity of solution ×Change in temperature.

Heat released by the water = 55.9 g × 1 calorie/ (°C g) ×(99.2 - 96.9 )°C

Heat absorbed by the zinc metal =  23.9 g ×specific heat ×(96.9 - 21.1) °C

Heat absorbed by zinc metal = heat released by water

23.9 × Specific heat of zinc metal ×75.8 = 55.9 ×1 ×2.3

specific heat of zinc metal = 128.57 ÷1811.62 = 0.0071 calorie / (g °C)

Thus the specific heat capacity of zinc is  0.0071 calorie / (g °C)

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What do all of the elements in a given horizontal row of the periodic table have in common?

Answers

They have the same number of energy levels.

The elements in a given period (horizontal row) have the same number of electron shells in their atoms.

What are periods in the periodic table?

The horizontal row in the modern periodic table is called period. All elements placed in a period have the same number of electron shells. Each next element in a period exceed one proton and so has less metallic character than its precursor.

The atomic number increases on moving left to right in a period that tells that number of electrons and protons increases in an atom. As in a period, elements have filled the same electron shells, but an increase in the number of electrons in the same shell causes an increase in the effective nuclear charge. Therefore, the atomic radius of an atom of the elements decreases in a period.

Therefore, the elements in the same period have the same number of electron shells. For example, all elements of the second period have only two electron shells.

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What effect would a decrease in ph have on the amount of potassium ion in the urine?

Answers

The effect would a decrease in pH have on the amount of potassium ion in the urine will be a decrease in the amount of potassium in the urine. There will be a decrease in the amount of potassium in the urine, it is the effect if there would be a decrease in pH on the amount of the potassium ion in the urine.

which sentence correctly describes the position of electrons within an atom?

A. Electrons exist outside the nucleus in indistinct electron clouds

B. electrons orbit the nucleus in distinct circular paths 

c. electrons are attatched to the outside of the nucleus

 d. electrons orbit the nucleus in uniform concentric circles

Answers

Answer: B. electrons orbit the nucleus in distinct circular paths

Explanation: Electrons are found in shells or orbitals that surround the nucleus of an atom.

In an electron-dot structure of an element, the dots are used to represent ________.

Answers

Dots are used to represent electrons.

Lewis electron dot diagrams represent valence electrons around atomic symbols, aiding in predicting bonding capabilities. Valence electrons' importance in chemical reactivity is highlighted through electron-dot symbols in Lewis diagrams.

Lewis electron dot diagrams use dots to represent valence electrons around an atomic symbol. These dots are arranged to the right and left, above, and below the symbol, indicating the valence electrons. For example, in the Lewis structure for hydrogen, it is represented by a single dot.

Valence electrons are crucial in determining an atom's reactivity and bonding capabilities. Electron-dot symbols help predict the number of bonds an element can form in a compound. In Lewis diagrams, dots represent the valence electrons, while lines denote bonds formed between atoms.

what tools should a scientist use to measure an object in milligrams

Answers

a scale is what a scientist would use

Hello, the answer is a pan balance. A pan balance is a measuring instrument for determining the weight or mass of an object.

In the presence of oxygen, the three-carbon compound pyruvate can be catabolized in the citric acid cycle. first, however, the pyruvate (1) loses a carbon, which is given off as a molecule of co2, (2) is oxidized to form a two-carbon compound called acetate, and (3) is bonded to coenzyme
a. why is coenzyme a, a sulfur-containing molecule derived from a b vitamin, added?

Answers

It would be added since it is to provide an unstable molecule which can bind to the oxaloacetate. This is due to it's acetyl portion.

An atom of rubidium has 37 protons and 48 neutrons. If the atom loses one electron what will be the charge on the ion that forms?

-36
+1
36
-1

Answers

An atom has three subatomic particles: (1) neutrons, (2) protons, and (3) electrons. Both neutron and proton stay inside the atom's nucleus and comprised mainly the mass of the atom. The electron however is a negatively charged subatomic particle and stays outside of the nucleus. In a neutral atom, the number of protons and electrons should be equal. However, if the atom is negatively charged, this means it contains more electrons than protons.

If the ion is positively charged, this means that it contains more proton than electrons. 

If an atom loses one if its electrons then, it becomes negatively charged. Since, only one electron is lost then the answer to this item is the second choice, +1. 

Answer:

+1

Explanation:

the most common source of copper (Cu) is the mineral chalcopyrite (CuFeS2). How many kilograms of chalcopyrite must be mined to obtain 475 g of pure Cu?

Answers

0.650 kg... I think, 
But what are the answer choices?

What unusual property of water is responsible for frost wedging?

Answers

The property of water that it expands and becomes less dense as it freezes. The property is unusual because it  is not the case in other liquids. 
 Ice wedging is a form of mechanical weathering or physical weathering in which cracks in rock or other surfaces fill with water, freeze and expand, causing the cracks to enlarge and eventually break.
1. The fact that water requires more volume when it solidifies (freezes). Most liquids will turn into a solid when they freeze and in the process of freezing, take a smaller volume. But water is unusual in that when it freezes, it increases its volume. And during that expansion, it can exert a LOT of force. If water is in an enclosed space, it can exert about 1000 times atmospheric pressure against its surroundings.

Granite is a ________ that contains the mineral quartz. a. mineral c. rock b. glass d. mica

Answers

i think it would be C

I’m pretty sure it is c my friend

What type of radiation is carbon emitting in the following equation? 14/6C - 0/-1 + 14/7N A. alpha particles B. beta particles C. gamma rays

Answers

i think the answer is C

Answer is: B. beta particles.

Nuclear reaction: ¹⁴C → ¹⁴N + e⁻ + νe (electron antineutrino).

In beta minus decay (atomic number Z is increased by one, from 6 in carbon to 7 in nitrogen) neutron is converted to a proton and an electron and an electron antineutrino.

Beta decay is radioactive decay in which a beta ray and a neutrino are emitted from an atomic nucleus.

What is the molar mass of a pure gaseous compound having a density of 2.95 g/l at 32⁰c and 860 mm hg? (1 atm = 760 mm hg)?

Answers

Given:
ρ = 2.95 g/L = 2.95 kg/m³, the density
T = 32°C = 32+273 K = 305 K, the temperature
p = 860 mm Hg = (860/760) atm = 1.1316 atm
   = 1.1316*101325 Pa
   = 1.14657 x 10⁵ Pa

The ideal gas law is
p = ρ*(R/M)*T
where
R = 8.314 J/(mol-K), the gas constant
M = molar mass, kg/mol

The molar mass is
[tex]M= \frac{\rho R T}{p} = \frac{(2.95 \, kg/m^{3})*(8.314 \, J/(mol-K)*(305 \, K)}{1.14657 \times 10^{5} \, Pa} =0.0652 \, kg/mol[/tex]
The molar mass is 0.0652 kg/mol = 65.2 g/mol

Answer: 65.2 g/mol

To find the molar mass of the gaseous compound, we used the Ideal Gas Law and calculated it to be approximately 65.65 g/mol.

The given conditions were converted and used properly to solve the problem.

This approach ensures an accurate determination of molar mass.To find the molar mass of the gaseous compound, we use the Ideal Gas Law equation: PV = nRT. First, we need to convert all given units to proper SI units and ensure consistency.

Given data:

Density (ρ) = 2.95 g/LTemperature (T) = 32°C = 305 K (since T(K) = T(°C) + 273.15)Pressure (P) = 860 mm Hg = 1.132 atm (since 1 atm = 760 mm Hg)

We know from the Ideal Gas Law:

PV = nRT

Rearranging to solve for molar mass (M):

M = (ρRT) / P

Substitute the values:

M = (2.95 g/L * 0.0821 L atm/mol K * 305 K) / 1.132 atm

Calculate the result:

M ≈ (2.95 * 25.041) / 1.132 ≈ 65.65 g/mol

Therefore, the molar mass of the compound is approximately 65.65 g/mol.

When hydrogens on an unsaturated fatty acid lie on the same side of the carbon-carbon double bond, a ____________ formation exists?

Answers

When hydrogen ................................... a CIS formation exist.
There are two types of formation which are possible in fatty acids, these are CIS and TRANS configurations.
A fat is described as a CIS fatty acid if its hydrogen atoms are lying on the same side of the carbon carbon double bonds. A fat is said to be a trans fatty acid, if the hydrogen atoms in its molecules are lying on the opposite sides of the carbon bonds.

Which block on the periodic table contains the actinide series of elements?

Answers

F BLOCK is the block on the period table that contains the actinide series of elements.

Actinide series of elements are two rows under the periodic table which include Lanthanide series and Actinide series. These are all radioactive elements and all of these are not not found in nature. All these are included in F block element.

Sound is not part of a electromagnetic spectrum because
A: Sound is not a type of energy wave
B: Sound is not a type of electromagnetic radiation
C: Sound does not have a wavelength
D: Sound does not have a frequency

Answers

Sound is not part of the electromagnetic spectrum because sound is not a type of energy wave sound is not a type of electromagnetic radiation sound does not have a wavelength sound does not have a frequency.
Your welcome.



Molecules can be either positively or negatively charged depending upon their elemental arrangement

Answers

They are positively or negatively charged based on their electrical configuration of electrons*
For example an electronic configuration of 2,8,3 would have a negative charge if +3 since it needs to lose 3 electrons to gain the electrical configuration of a noble gas
2,8,1 would have a charge of +1 for the same reason
2,8,6 would be -2 since it is easier to gain 2 electrons that lose 6 electrons

Hope this helped :))


Which equation represents the reaction of acetic (ethanoic) acid with water?


CH3COO- + H2O CH3COOH + OH-



CH3COOH + H2O CH3COO- + H3O+



CH3COO- + H2O CH3COO2- + H3O+



CH3COOH + H2O CH3COOH2+ + OH-



Answers

CH3COOH+H20 CH3COO-+H30+

Answer:

in shorter terms, the answer is B. CH3COOH + H2O CH3COO- + H3O+

Explanation:

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Calculate the volume, in ml. of the 1.0 m naoh stock solution needed to prepare 250 ml of 0.1 molar naoh.

Answers

By using the following formula we can calculate the volume;
C₁V₁ = C₂V₂
C₁ = concentration of starting solution = 1.0m
V₁ = volume of starting solution that is needed to make the dilution = ?
C₂ = Desired concentration of final solution = 0.1m
V₂ = desired volume of final solution = 250ml
Now putting the values in the formula;
1 x V₁ = 0.1 x 250
V₁ = 25ml
Thus, the answer is 25ml.

The equation represents the combustion of sucrose. C12H22O11 + 12O2 12CO2 + 11H2O If there are 10.0 g of sucrose and 8.0 g of oxygen, how many moles of sucrose are available for this reaction?

Answers

0.0292 moles of sucrose are available. First, lookup the atomic weights of all involved elements Atomic weight Carbon = 12.0107 Atomic weight Hydrogen = 1.00794 Atomic weight Oxygen = 15.999 Now calculate the molar mass of sucrose 12 * 12.0107 + 22 * 1.00794 + 11 * 15.999 = 342.29208 g/mol Divide the mass of sucrose by its molar mass 10.0 g / 342.29208 g/mol = 0.029214816 mol Finally, round the result to 3 significant figures, giving 0.0292 moles

Final answer:

To determine the moles of sucrose available, the molar mass of sucrose is calculated and used to convert the given mass of sucrose to moles, resulting in approximately 0.0292 moles.

Explanation:

To calculate the number of moles of sucrose available for the combustion reaction, first, we need to find the molar mass of sucrose (C₁₂H₂₂O₁₁). By adding the atomic masses of carbon (12 atoms × 12.01 g/mol), hydrogen (22 atoms × 1.008 g/mol), and oxygen (11 atoms × 16.00 g/mol), we can determine the molar mass of sucrose to be approximately 342.3 g/mol. Using the mass of sucrose given, we can calculate the number of moles of sucrose as follows:

Convert grams of sucrose to moles using the molar mass: 10.0 g of sucrose × (1 mol / 342.3 g) ≈ 0.0292 moles of sucrose.

Therefore, there are approximately 0.0292 moles of sucrose available for the reaction.

Which of the following laboratory instruments can be heated up with a Bunsen burner?
Erlenmeyer flask
Graduated cylinder
Plastic pipette 
Chromatography paper

Answers

A. Erlenmeyer Flask (not sure never took lab chem before, but I think that would be most logical.)
A. Erlenmeyer Flask....................

The first letter of a chemical symbol is capitalized.true or false

Answers

True because it has to be an capital letter because it’s scientific

Answer: True

Explanation: The Periodic Table is an orderly grouping chemical elements known to scientists. This table includes the name of each element, its symbol, atomic mass (weight), and electron distribution. The first letter of each chemical symbol is capitalized.

How is a hydrogen-1 atom different form a hydrogen-2 atom? How are they similar?

Answers

If you’re referring to H vs H2,

H is usually found in ion form as H+

H2 is the designation for pure hydrogen gas, as it is diatomic and can only exist on its own in nature if it’s bonded to another H atom.

In this case, H is an ion and H2 is hydrogen gas

The way you wrote them out, though, indicates that they could be something different. Maybe isotopes? In this case the 1 and 2 are indicative of the amount of neutrons that the atom has.

The smallest unit that can exist as an element and still have the properties of that element is a(n):
A.electron
B.proton
C.neutron
D.atom

Answers

Final answer:

The correct answer "atom". The smallest unit that can maintain the properties of an element is an atom. Atoms are composed of electrons, protons, and neutrons, with the number of protons determining the element type. Atoms are the key to understanding elemental properties.

Explanation:

The smallest unit that can exist as an element and still maintain the properties of that element is a(n) atom. An atom is the foundational building block of all matter, and it retains all the characteristics of the element. By definition, atoms are composed of subatomic particles: electrons (negative charge), protons (positive charge), and neutrons (neutral). These particles are what give the atom its properties. The number of protons in an atom’s nucleus specifically determines the type of element it is.

Atoms are extremely small, typically around 100 picometers in size, and their behavior is heavily influenced by quantum mechanics. This means that classical physics, which might treat particles like billiard balls, does not accurately predict atomic behavior. Atoms are the smallest units that maintain the properties of an element, making it the correct answer (D).

Magnesium has 12 protons. how many electrons are in its second energy level?

Answers

it has 8 electrons in its second shell.

If 0.35 m of ammonia solution has a ph of 9.15, what is the h+ concentration of the solution?

Answers

To find the H+ concentration of an ammonia solution with a pH of 9.15, we use the inverse logarithm of the negative pH value, which gives a H+ concentration of 7.08  imes 10^-10 M.

If the pH of a 0.35 M ammonia solution is 9.15, we can calculate the H+ concentration using the pH formula. The formula for pH is pH = -log[H+], where [H+] represents the concentration of hydrogen ions in moles per liter (M). To find [H+], we take the inverse logarithm (antilog) of the negative pH value:

[H+] = 10-pH

Plugging in the pH value given:

[H+] = 10-9.15 = 7.08  imes 10-10 M

Therefore, the concentration of H+ ions in the ammonia solution is 7.08  imes 10-10 M.

What mass of magnesium chloride is needed to make 100.0 mL of a solution that is 0.500 M in chloride ion?

Answers

M = n/V

.5M = n/.100 L

n = .1 L * .5M

n= .05 mols of MgCl2

mass of MgCl2 = .05 mols of MgCl2 * 95.211 grams/ 1 mol of MgCl2 

mass of MgCl2 = 4.76 grams

4.76 grams of MgCl2 is needed to make 100 ml of a solution that is .500M, in chloride ion. Bolded = confused

What element has a mass number of 16 and 8 neutrons

Answers

The element would be Oxygen.
Work:
Mass = atomic # + neutrons
(The atomic number is the same as the number of protons in an element)

To find the number of protons substitute x 
16 = x + 8
x = 8 protons
Oxygen has 8 protons

I hope this helps!
The answer is O (oxygen).

Does oxygen have a greater mass than chlorine

Answers

Atomic oxygen does not have a greater atomic mass than chlorine, nor does molecular oxygen.

Hope this help...


Final answer:

An oxygen molecule (O₂) has a mass of 32, whereas a chlorine molecule (Cl₂), taking into account the natural abundances of Cl-35 and Cl-37, has an average mass of approximately 70.9. Thus, chlorine has a greater mass than oxygen.

Explanation:

The student asked whether oxygen has a greater mass than chlorine. When comparing the masses of these elements, it's essential to consider the mass of their most common isotopes. Oxygen has a common isotope of oxygen-16 with a mass number of 16, while chlorine has two common isotopes, chlorine-35 with a mass number of 35 and chlorine-37 with a mass number of 37. Therefore, an oxygen molecule (O₂), which contains two oxygen atoms, has a mass of 32, while a chlorine molecule (Cl₂) would on average weigh approximately 35.5 times two due to the natural abundance of its isotopes, making it about 70.9.

This indicates that a molecule of chlorine has a greater mass than a molecule of oxygen. However, solubility of these gases in various solvents can also be related to molecular size and interactions, such as dispersion forces and dipole-dipole attractions. For example, oxygen's solubility in hexane is significantly greater than its solubility in water, illustrating the effect of these interactions on solubility.

what country was the element hydrogen discovered in

Answers

i believe it was discovered in france

Final answer:

Hydrogen was discovered in England by Henry Cavendish in 1766. While this discovery was unrelated to celestial observations as in the case of helium, hydrogen is the most abundant element in the universe and essential in the composition of stars.

Explanation:

The element hydrogen was discovered in England, not in the context of celestial observations but as an earthly element. The first recognized discovery of hydrogen is attributed to the English scientist Henry Cavendish in 1766. Cavendish identified hydrogen as a distinct species by performing experiments in which he reacted metals with strong acids to produce a gas. However, its importance and the role it plays in the universe were not completely understood at that time. Later discoveries, like that of helium in the sun's spectrum, showcased the extensive presence of elements like hydrogen in outer space, being central to the composition of stars like our Sun.

Although the student's question seems slightly mixed up with the discovery of helium, it provides a good opportunity to explore not only the terrestrial elements but also those found in the cosmic environment. Hydrogen is the most abundant element in the universe and plays a vital role in the constitution of stars and many compounds on Earth.

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