hydrogen gas reacts with oxygen gas to form water. At stp, how many liters of hydrogen gas react with 32.4L of oxygen ga
Answer:
64.8L of H2
Explanation:
We need to start with a balanced chemical equation. I arrive at the following:
O2 + 2H2 = 2H2O
This tells us that we'll get 2 moles of H2O for every 1 mole O2 consumed, and that we'll need 2 moles of H2 for every 1 mole of O2. For this question, the important ratio is 2 moles of H2 for every 1 mole of O2. We know we have 23.4 L of O2. Let's convert that into moles O2 by using a very useful conversion factor that works for ALL gases at STP (Standard Temperature and Pressure). The conversion is 22.4M/L. That means that at STP we'll have 1 mole of that gas if we have 22.4L of the gas. And that works for all gases. [1mole = 22.4L at SDTP for all gases].
So let's calculate the moles of oxygen gas present in 32.4L:
(32.4L)*(1 mole/22.4L)= 1.45 moles O2.
If all the oxygen reacts, we'll need twice the number of moles of H2, as per the balanced equation.
(1.45 moles O2)*(2) = 2.90 moles H2
Convert 2 moles H2 at STP into moles H2: (2.90 moles H2)*(22.4L/mole) = 64.8L of H2.
In scientific notation, the radius of the Sun is what?
Answer:
6.96 x 10^5 km (in 3sf)
Explanation:
Exact radius of the sun is 695,508 kilometers.
Hence, in scientific notation, it should be 6.95508 x 10^5 km
hence 6.96 x 10^5 km in 3sf.
Classify the C- Cl bond in CCl4 as ionic, polar covalent or non-polar covalent. (EN: C = 2.5, Cl =-3,0) O ionic O polar covalent O nonpolar covalent
The difference in the electronegativity of the bond shows that the bond is polar.
How do you know a polar bond?We can say that a bond is a polar bond when the difference in the electronegativity of the bond is large. Thus we have to lok at the values of the electronegativity of the atoms that have been given and then we would try to know how to be able to obtain the polarity.
Electronegativity of Carbon = 2.5
Electronegativity of chlorine = 3.0
Difference in electronegativity = 3.0 - 0.5 = 0.5
As such the bond is polar.
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Hydrogen peroxide does NOT make a good antiseptic for open wounds because __________.
a. catalase in human tissues neutralizes it
b. it evaporates too quickly
c. it is too toxic for human cells
d. it is too expensive for this type of use
Answer:
Hydrogen peroxide does not make a good antiseptic for open wounds because catalase in human tissues neutralizes it.
Explanation:
The neutralization of hydrogen peroxide by the enzyme catalase present in the cells of an open wound can cause damage to the cells and impede the healing process, making hydrogen peroxide not a good antiseptic for open wounds.
When it comes in contact with the living tissue, the enzyme catalase catalyzes the breakdown of the hydrogen peroxide into water and oxygen. This process can generate heat and cause damage to the cells in the area. Additionally, the breakdown of hydrogen peroxide can also generate free radicals, which can further damage the cells in the wound. Furthermore, the neutralization of hydrogen peroxide by catalase can cause the wound to dry out, making it more difficult for new cells to grow and the wound to heal.
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predict the δhrxn for the following reaction: rb(g) + na+(g) → rb+(g) + na(g)
ΔHrxn < 0 because the IE1 for Rb is less than the IE1 for Na
ΔHrxn > 0 because the IE1 for Rb is less than the IE1 for Na
ΔHrxn < 0 because the IE1 for Na is less than the IE1 for Rb
ΔHrxn < 0 because the IE1 for Na+ is less than the IE1 for Rb+
ΔHrxn > 0 because the IE1 for Na+ is less than the IE1 for Rb+
ΔHrxn < 0 because the Ionization Energy1 for Rb is less than the Ionization Energy1 for Na
Ionization energy can be simply stated as a measurement of an atom's or ion's inclination to give up an electron or of how challenging it is to remove an electron from them. An electron is often lost when a chemical species is in its ground state.
IE declines in a group from top to bottom.
IE1 for Rb is less than the IE1 for Na.
Rb----------> Rb+ + e- IE1 = 403 kJ/mol ----------- Eq (1)
Na----------> Na+ + e- IE1 = 496 kJ/mol ------------- Eq (2)
Given reaction,
Rb(g) + Na+(g) ? Rb+(g) + Na(g)
Take Eq(1) same as above
Rb---------> Rb+ + e- IE1 = 403 kJ/mol
Take reverse of Eq (2)
Na+ + e- ------------> Na IE1 = - 496 kJ/mol
Hence,
Rb---------> Rb+ + e- IE1 = 403 kJ/mol
Na+ + e- ------------> Na IE1 = - 496 kJ/mol
Add above two equations
Rb(g) + Na+(g) ? Rb+(g) + Na(g)
ΔHrxn = 403 kJ/mol - 496 kJ/mol = -93 kJ/mol
Therefore,
Ans is ΔHrxn < 0 because the IE1 for Rb is less than the IE1 for Na
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Draw the molecule
2,5-dimethyl-4-(2-methylpropyl)octane
The structural formula of 2,5-dimethyl-4-(2-methyl propyl)octane [tex]C_{14}H_30[/tex]
The arrangement of atoms and the chemical bonds that hold them together make up a molecule's chemical structure. There are 43 bonds altogether in the 2,5-dimethyl-4-(2-methyl propyl)octane molecule (s) There are 7 rotatable bonds and 13 non-H bonds (s).
2,5-dimethyl-4-(2-methyl propyl)octane's 2D chemical structure is also known as the skeletal formula, which is the accepted nomenclature for organic molecules. In the 2,5-dimethyl-4-(2-methyl propyl)octane chemical structure, the carbon atoms are implied to be at the corner(s) and hydrogen atoms coupled to carbon atoms are not shown; instead, it is assumed that each carbon atom is connected to enough hydrogen atoms to form four bonds.
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Complete and balance the following half-reaction in acidic solution NO3- (aq) → NO(9)
The complete balanced chemical reaction can be written from the half reaction in acidic solution is,
NO3- + 4H+ + 3e ----> NO + 2H2O.
The half reaction is the part of reaction which represents either an oxidation or a reduction. There are two half-reactions. one is oxidation and other is reduction. Both are necessary to completely describe a redox reaction.
NO3- ----> NO.
This reaction is not balanced and not completed.
NO3- + 4H+ + 3e----> NO + 2H2O.
This is a balanced chemical reaction. A balanced equation contains the same number of each type of atoms on both the left and right sides of the reaction arrow. To write a balanced equation, the reactants go on the left side of the arrow, while the products go on the right side of the arrow.
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1. Identify the four key components of all fireworks.
2. In a typical aerial burst, how many explosions take place? What happens in each explosion?
3. Which of the gas laws explains what happens when an aerial shell explodes?
4. The article describes two ways in which light can be produced. What are they?
5. Name two metal ions capable of producing red colors in fireworks.
The four keys of all fire works are fuel, colorant , oxidizing agent and binder. Up to three explosions will takes place in a typical aerial burst.
What is explosive reactions?Explosive reactions are exothermic reactions, which evolve heat energy to the surroundings. The four keys components of all fireworks are fuel, colorant , oxidizing agent and binder. Up to three explosions will takes place in a typical aerial burst.
The gas laws explains what happens when an aerial shell explodes is Charles's law. This law explains that when temperature increases, gas expands and eventually explodes.
Two ions which produce red colors in fire work are lithium and strontium.
The two ways by which light can be produced are oscillation and acceleration of charged particles.
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