Both containers have the same number of molecules= 5.62 x 10²³
Further explanationGiven
22.4 L of hydrogen gas
22.4 L of oxygen gas
25°C and 1 atm.
Required
true statement
Solution
Conditions at T 25 ° C and P 1 atm are stated by RTP (Room Temperature and Pressure). Vm in this condition = 24 liters / mol
and from Avogadro's Law :
At the same temperature and pressure, the ratio of gas volume will be equal to the ratio of gas moles
So two gas have the same molecules
1 mol = 6.02 x 10²³ molecules
24 L = 1 mol, so for 22.4 L :
[tex]\tt \dfrac{22.4~L}{24~L}\times 6.02\times 10^{23}~molecules=5.62\times 10^{23}~molecules[/tex]
What is the result of cellular respiration? (A) Energy for cell processes is released. (B) Oxygen is released for photosynthesis. (C) Cells undergo decomposition. (D) Nutrients are excreted to prevent the buildup of body fat.
Answer:
A Energy for cell processes is released
A ____ is the remains of a once-living organism found in layers of rocks, ice, or amber
Answer:
fossil
Explanation:
the dead organism is called a fossil i think
Answer:
A fossil is the remains of a once-living organism found in layers of rocks, ice, or amber
Suppose you were writing a summary of the article. Which of these will be most important to put in the summary?
(05 06 MC) The theoretical yields of Cl2 from certain starting amounts of MnO2 and HCl were calculated as 65.36 g and 68.08 g, respectively.
If the percentage yield of Cl2 is 70%, what is its actual yield?
42.25g
45.65g
46.33g
47.66g
Actual yield : 45.752 g ⇒no option
Further explanationGiven
The theoretical yields of Cl₂ : 65.35 g and 68.08 g
Required
The actual yield
Solution
Reaction
4 HCl (aq) + MnO₂ (s) → MnCl₂ (aq) + Cl₂ (g) + 2H₂O (l)
Because there are two theoretical yields, then we can choose the smallest one because the value is usually determined from the limiting reactant (in this reaction the limiting reactant is MnO₂)
So 65.36 g is The theoretical yields of Cl₂
Then the actual yield :
[tex]\tt \%yield=\dfrac{actual}{theoretical}\times 100\%\\\\actual=\%yield\times theoretical\\\\actual=70\%\times 65.36=45.752[/tex]
toms of elements at the top of a group on the periodic table are smaller than the atoms of elements at the bottom of the group. How does this help explain the difference in the reactivity of metals within a group?
Answer:
Atoms of elements at the top of a group on the periodic table are smaller than the atoms of elements at the bottom of the group. ... The valence electrons of the larger atoms are farther from the nucleus and are easier to remove, so the metals near the bottom are more reactive than those at the top.
PLZ HELP!
What would happen to work and power if the mass of the person walking was increased or decreased? EXPLAIN.
Answer:
it would decrease / increase with the mass
Explanation:
How would decreasing the pressure affect the equilibrium of this reaction? Hat 12 32H1 O A. The reaction would remain in equilibrium B. HI would react to produce more H2 and 12 more quickly. O C. H2 and 12 would react to produce HI more quickly. D. All of the molecules would react more slowly.
A. The reaction would remain in equilibrium
Further explanationGiven
Reaction
H₂ + I₂ ⇔ 2HI
Required
the effect of pressure changes
Solution
In the equilibrium system :
Reaction = - action
⇒shift the reaction to the right or left.
The pressure usually affects the gas equilibrium system(only count the number of moles of gases)
The addition of pressure, the reaction will shift towards a smaller reaction coefficient ((the fewest moles of gas )
Reaction
H₂ + I₂ ⇔ 2HI
The reactant side of the equation has 2 moles of a gas(1 mole H₂ and 1 mole I₂) ; the product side has 2 moles HI
So the total number of moles from both sides is the same(2 moles) so that the change in volume (pressure) does not change the direction of equilibrium⇒No shift will occur
Answer:
A. The reaction would remain in equilibrium
Explanation:
Explain the formation of an ionic compound between a metal and a non- metal by transfer of electrons with Mg as the metal and chlorine as the non metal to illustrate your answer. Give the reaction that occurs.
Answer: MgCl2
Explanation:
There will be two Chlorine atoms, and one Magnesium atom. The Mg atom will transfer one valence electron to each Chlorine atom to make them stable. I don't know the reaction that happens, I'm Sorryy. But yeah... have a nice day! :)
I
3. In words, explain what occurs in terms of electrons when
beryllium reacts with oxygen
Explanation:
On the whole, the metals burn in oxygen to form a simple metal oxide. Beryllium is reluctant to burn unless it is in the form of dust or powder. Beryllium has a very strong (but very thin) layer of beryllium oxide on its surface, and this prevents any new oxygen getting at the underlying beryllium to react with it
What is an example of heating water until it boils?
What's the molar mass of Cr(Cr2O7)3
700 g/mol
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableExplanation:Step 1: Define
Cr(Cr₂O₇)₃
Step 2: Identify
Molar Mass of Cr - 52.00 g/mol
Molar Mass of O - 16.00 g/mol
Step 3: Find MM
Molar Mass of Cr(Cr₂O₇)₃ - 52.00 + 6(52.00) + 21(16.00) = 700 g/mol
Table Salt or NaCl is composed of sodium and chlorine. While the individual elements of sodium and chlorine are very reactive, together they form a popular cooking and baking ingredient. In order to form a salt, an electron must be transferred from one element to the other. Which element (Na or Cl) is more likely to steal an outer electron from the other? Why?
Answer:
Chlorine is more likely to steal a valence electron from sodium.
Explanation:
Sodium is number 11 on the periodic table with one valence electron. Belonging to the first group, it's one of the alkali metal, which are known to be highly reactive. Chlorine is number 17 with seven valence electrons, and it's in the second-to-last group of halogens--also very reactive.
Considering that elements with one valence electron are just about 100% likely to give up electrons to reach a stable state, sodium would be the element that is more likely to lose its valence electron to chlorine. In other words, chlorine would be the electron thief.
calculate the mass of one atom of helium.
Answer:
One atom lf helium has a mass of 4 u
Know that 1 u =1.66. 10-24g
Geologists apply various methods to study the layers of the earth. Which if the following is a method used to study the deaths layers
Answer: ???
Explanation:???
Red light has a wavelength of 700 nm and a frequency of 4.3 x 10^14 s^-1. What is the energy of a single photon of red light?
A. 2.85 x 10^-20
B. 2.85 x 10^19
C. 2.85 x 10^-34
D. 2.85 x 10^-19
Answer:
E = 2.85×10⁻¹⁹ J
Explanation:
Given data:
Wavelength of light = 700 nm
Frequency of light = 4.3×10¹⁴ s⁻¹
What is the energy of light = ?
Solution:
Formula:
E = h × f
h = plancks constant = 6.63×10⁻³⁴ Js
by putting values,
E = 6.63×10⁻³⁴ Js × 4.3×10¹⁴ s⁻¹
E = 28.5×10⁻²⁰ J
E = 2.85×10⁻¹⁹ J
Which change will decrease the electric force between two positively charged objects? moving them closer together moving them farther apart adding neutrons removing electrons
Answer:
Moving them farther apart
Explanation:
One can try to change the distance between the two positive charges in such a way that it increases the distance and decreased the electric force.
Answer:
moving them farther apart
Explanation:
aka B.
How much of the electromagnetic spectrum is visible to us
A. all of it
B. None of it
C. Most of it
D. A small part of it
Which element has the same number of energy levels as aluminum (Al) and the same number of valence electrons as calcium (Ca)
Answer:
magnesium (Mg)
Explanation:
Answer:
Be (Beryllium)
Explanation:
12. Which of these elements is most likely to attract electrons from another atom during chemical bonding?
O 1) Fe
2) C
3) AI
4) Cs
I think the correct answer of these qusion is 2
Why krypton and noble gas are not used in airships using the periodic table?
Answer:
Since the noble gases are unreactive or inert, they are safe to use. Helium is used to fill balloons and airships, because it is much lighter that air and it will not catch fire. Neon is used in advertising signs. It will give red glow, but the color can be changes by mixing it with other gases.
Explanation:
Vertical columns on the periodic table are known as
and horizontal rows are called
O periods, groups
groups, periods
O metals, nonmetals
O metalloids, metals
Answer:
groups and periods
Explanation:
Giselle is working with a chemical substance in a laboratory. She observes that when the chemical is heated, it gives off a gas. She assumes that the gas is oxygen but decides to test this assumption to verify it. Which type of scientific knowledge is Giselle’s assumption?
The question is incomplete, the complete question is;
Giselle is working with a chemical substance in a laboratory. She observes that when the chemical is heated, it gives off a gas. She assumes that the gas is oxygen but decides to test this assumption to verify it. Which type of scientific knowledge is Giselle’s assumption?
A.
fact
B.
hypothesis
C.
law
D.
observation
E.
theory
Answer:
B.
hypothesis
Explanation:
A hypothesis is an intelligent guess put forward to explain an experimental observation. It is a tentative explanation for a scientific observation which must be subjected to careful verification.
Giselle’s assumption that the gas evolved is oxygen is a hypothesis. It must now be tested carefully in order to verify if the hypothesis is true.
what is amphoteric oxide please also give eg
Answer:
An amphoteric oxide is an oxide that can act as either an acid or base in a reaction to produce a salt and water. Amphoterism depends on the oxidation states available to a chemical species. Because metals have multiple oxidation states, they form amphoteric oxides and hydroxides.Many metals (such as zinc, tin, lead, aluminium, and beryllium) form amphoteric oxides or hydroxides. Amphoterism depends on the oxidation states of the oxide. Al2O3 is an example of an amphoteric oxide. Amphoteric oxides also include Lead (II) oxide, and zinc (II) oxide, among many others.[2]
Explanation:
hope this will help you
Answer:
Amphoteric oxides react with both acids and alkalis to form salt and water. Examples of amphoteric oxides are zinc oxide and aluminium oxide.
Explanation:
hope it helps....
Would a tighter or a looser cover heat the oven faster? How about no covering at all?
What is the electron configuration of chlorine (CI)?
O 1s?2s?2p°3s?3p³
O 1s2s?2p3s?3p5
O 1s2s22p3s?4s?3p3
O 1s?2s?2p3s?3p²3d
Hello! :)
[tex]\large\boxed{1s^{2}2s^{2}2p^{6}3s^{2}3p^{5}}[/tex]
Chlorine is a halogen located in group 7A and period 3 of the periodic table.
We can write the electron configuration of this element. Since it is in period 3, the highest configuration level will be at 3.
Chlorine is also located in the p block (nonmetal) section of the table, so the final part of the written configuration will involve "3p".
Recall that:
S block: up to 2 electrons
P block: up to 6 electrons
Chlorine has 17 electrons
Fill in the order of s block to p block. The first level only goes up to an s block. The configuration should sum up to 17 total electrons in total.
We can write the configuration as:
[tex]1s^{2}2s^{2}2p^{6}3s^{2}3p^{5}[/tex]
How many grams are in 1.76 x 10^23 atoms of iodine
Answer:
[tex]\boxed {\boxed {\sf About \ 37.1 \ grams \ of \ iodine }}[/tex]
Explanation:
To convert from atoms to grams, you must first convert atoms to moles, then moles to grams.
1. Convert Atoms to Moles
To convert atoms to grams, Avogadro's number must be used.
[tex]6.022*10^{23}[/tex]
This number tells us the number of particles (atoms, molecules, ions, etc.) in 1 mole. In this case, the particles are atoms of iodine.
[tex]\frac{6.022*10^{23} \ atoms \ I }{1 \ mol \ I}[/tex]
Multiply the given number of atoms by Avogadro's number.
[tex]1.76*10^{23} \ atoms \ I*\frac{6.022*10^{23} \ atoms \ I }{1 \ mol \ I}[/tex]
Flip the fraction so the atoms of iodine will cancel out.
[tex]1.76*10^{23} \ atoms \ I*\frac{ 1 \ mol \ I}{6.022*10^{23} \ atoms \ I}[/tex]
[tex]1.76*10^{23}* \frac{1 \ mol \ I}{6.022*10^{23} }[/tex]
Multiply so the problem condenses into 1 fraction.
[tex]\frac{1.76*10^{23} \ mol \ I}{6.022*10^{23} }[/tex]
[tex]0.2922617071 \ mol \ I[/tex]
2. Convert Moles to Grams
Now we must use the molar mass of iodine, which is found on the Periodic Table.
Iodine Molar Mass: 126.9045 g/molUse this mass as a fraction.
[tex]\frac{ 126.9045 \ g\ I }{ 1 \ mol \ I}[/tex]
Multiply this fraction by the number of moles found above.
[tex]0.2922617071 \ mol \ I*\frac{ 126.9045 \ g\ I }{ 1 \ mol \ I}[/tex]
Multiply. The moles of iodine will cancel.
[tex]0.2922617071 *\frac{ 126.9045 \ g\ I }{ 1 }[/tex]
The 1 as a denominator is insignificant.
[tex]0.2922617071 *{ 126.9045 \ g\ I }[/tex]
[tex]37.08932581 \ g \ I[/tex]
3. Round
The original measurement of 1.76*10^23 has 3 significant figures (1, 7, and 6). Therefore we must round our answer to 3 sig figs. For this answer, that is the tenths place.
[tex]37.08932581 \ g \ I[/tex]
The 8 in the hundredth place tells us to round the 0 up to a 1.
[tex]\approx 37.1\ g \ I[/tex]
There is about 37.1 grams of iodine in 1.76*10^23 atoms.
PLEASE HELP this is due today the picture is below
Answer:
Explanation:
Ok so the first one would be Electrical energy and Radiated energy
Then the 2 question it would be not electrical but the other 3 for the 3 question it would be it would be Electrical and the radiated energy
And for the last one it would be the last 3
Can someone help me with a Rocks Presentation that is worth 90 points?
Answer:
Sure!!! Is there a g-mail so I can get a hold of you?
Explanation:
What type of thermal energy transfer best describes how the surface of the earth is?
Answer:
Convection
Explanation:
Convection is a form of thermal energy that rotates like, hot air goes up and cool air goes down. This happens in the squishy part of the Earth surface, that's why ppl say the more you dig the hotter it gets :)
SHOW WORK
How many drops are in a 2-L bottle of Pepsi?
Answer:
The number of drops depends upon the size of the drops. So, basically, 1 ml has a drops of 20
so 2000 mo will have a 40k drops