After solving the equation the Molecular mass is 254 s is the answer.
What is Molecular mass?
Molecular mass is the sum of the atomic masses of all the atoms present in a molecule. It is an important property of molecules that is used in determining the chemical and physical properties of the molecule. Molecular mass is usually expressed in units of atomic mass units (amu) or daltons (Da). It is important to note that the molecular mass of a compound is not necessarily equal to the sum of the atomic masses of its constituent atoms, as the atoms in a molecule may be bound together by covalent bonds, which can alter their individual masses. Molecular mass can be calculated by adding the masses of the individual atoms present in the molecule. This value can be used to determine the identity of the molecule and its properties. Additionally, the molecular mass of a compound can be used to calculate the molar mass of the compound, which can be used to calculate the amount of a substance present in a given volume.
First we calculate,
Molecular mass of propane C3H8
= 3 x 12 + 1 x 8
= 44 gm/ml
Now, calculate amount of propane, c3h8, to effuse through the same orifice under the same conditions:-
[tex]t_{N2}[/tex]/[tex]t_{C3H8}[/tex] = [tex]\sqrt{28 gm/ml/ 44gm/ml}[/tex]
= 0.49
[tex]t_{C3H8}[/tex] = 125 s/0.49
= 254 s is the answer.
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There
are
approximately
317,000,000
people
in
the
U.S.,
and
the
area
of
the
U.S.
is
about
4,000,000
square
miles.
If
the
people
were
spread
out
evenly,
about
how
many
people
are
there
per
square
Answer:
yesddgfhzxhcvnjxkcncjzdkccchjjbxbxbbk
Based on Reference Table F, describe the solubility of zinc sulfide in water.
Answer:
negligible
Explanation:
negligible meaning its not very soluble in water at all
(wikipedia)
What is the half life of this element?
A. 80 days B. 40 days C. 5 days D. 10 days
Answer:
c. 5days
Explanation:
there is no question but if it's a graph
the answer is 5days
number 1 ............
Answer:
I am guessing it is B. Non-metal, metals, metalloids
moreee help science plsssssssssssssssss helpp
HELP HELP HELP !!!!!!!!!!!!!!
Answer:
approximately 83.33
Explanation:
The formula for the area of a right square pyramid is:
V= a^2(h/3)
a= base edge
h= height
The height is 10 inches, and the base edge is 5 inches. Plug it in to the formula:
V= 5^2 (10/3)
V= 25 (10/3)
V= 83.33 in^3
If we have 0.072 g of FeCl3 then how many moles are there?
Answer:
~0.0004
Explanation:
[tex]n=\frac{m}{M}[/tex]
n=0.072/(56+(35.5*3))=0.072/162.5~~0.004
Of the following elements ____ can form a rare +4 ion *
a) Aluminum
b) Lead
c) Krypton
d) Uranium
Answer:
d is the answer.........
Write the complete balanced equation for Manganese & sulfuric acid --> Manganese (II) sulfate & water & sulfur dioxide
no spaces
no subscripts
no 1's for coefficients
WILL GIVE BRAINLIEST!
Answer:
I kinda forgot. I'm sorry if I didn't answer your question.
Explanation:
If you want to change the mass of your atom by 1 or more mass units, you can ether
(2 RIGHT CHOICES)
add a proton
add a neutron
add an electron
If you want to change the mass of your atom by 1 or more mass units, you can either? Add a proton and Add a neutron.
Explanation:
Option A and Option B is your answers.
To change the mass of your atom by more mass units ; you can add a proton or add a neutron ( A and B )
The nucleus of an atom is composed of a neutron and a proton while the outer shell of an atom comprises of the electrons.
The mass of an atom is dependent on the mass of the nucleus of the atom therefore to increase the mass of the atom by any number of mass units you can either add a proton or a neutron to the nucleus of the cell.
Hence we can conclude that to change the mass of your atom you can add a proton or add a neutron to the nucleus of the atom
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Are the following equations balanced or unbalanced?
1. SnO2 + 2H2 → Sn + 2 H2O
2. 4NH3 + 5O2 → 4NO + 6H2O
3. 2B2Br6 + 5HNO3 2 B(NO3)3 + HBr
4. 2KNO3 + 1H2CO3 → 1K2CO3 + 2HNO3
HELP ME!!!! What is the gravitational potential energy stored in a church bell with a mass of 60 Kg hanging in a church steeple that is 20 m high?
A. 1200 J
B. 1960 J
C. 235,200 J
D. 11, 760 J
Answer:
A
Explanation:
1 How do I make a girl blush?
2 How do I know if I girl might like me by looking at her body language?
Answer:
1. Make Her Smile with You. Your smile is something which can turn the tables for you, if you possess a nice smile then it is no doubt a plus point for you or flirt with her.
2. She tilts her head while looking at you.
She constantly 'fixes' her hair, makeup, or clothing.
She returns your physical touches.
She stares or looks over at you a lot.
She blushes around you.
Explanation:
What cloud does cirrus and cumulus make???
Answer:
They're sometimes called 'mackerel skies' because they can sometimes have a grayish color which makes the clouds look a bit like fish scales. Cirrocumulus clouds exhibit features from both cumulus and cirrus clouds but should not be confused with altocumulus clouds.Explanation:
How many moles of ammonia are produced due to the reaction with two moles of nitrogen?
Answer:
17.03052 mutiple by 2
34.06104grams
Calculate the pH for a 1.0 x 10-5 M solution of OH at 25°C.
pH = -log[H*), pOH = -log[OH-]
14 = pH + POH
0 pH = 11.00
0 pH = 9.00
0 pH = 6.00
0 pH = 3.00
Answer:
ph=9.00
Explanation:
Given 1.0x10^-15M of OH at 25c
first find Poh from Poh=-log[OH]
then Poh=-log[1.0x10^-5]
from above Ph=5
then find Ph from ph+poh =pw
where pw=14
so
ph+5=14
ph=9.00
The pH for a 1.0 x 10-5 M solution of OH at 25°C is 9.
What is pH?pH is a measure of acidity and basicity of aqueous solution. The range of pH goes from 0 - 14, with 7 being neutral. pH of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base.pH is the measure of the relative amount of free hydrogen and hydroxyl ions in aqueous or other solutions.In water pH + pOH=14
pH = 14 - pOH = 14 - 5 = 9
From definition, pOH = - log₁₀ [OH⁻]
Thus pOH = -log₁₀ (1 x 10⁻⁵)
= - (-5) = 5
pH + pOH = 14
pH = 14 - pOH
= 14 - 5 = 9
pH = 9
Hence, pH = 9 is the correct answer.
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An alpha particle is identical to a:
helium nucleus
hydrogen nucleus
high energy electron
radium nucleus
Answer: helium nucleus
Iron (III) nitrate (Fe(NO3)3) solution reacts with sodium hydroxide (NaOH) solution to form a
brown precipitate of iron (III) hydroxide (Fe(OH)3). Sodium nitrate (NaNO3) remains in solution as
it is a soluble compound.
Write the word equation and the balanced formula equation for this reaction.
Answer:
Fe(NO3)3 + 3 NaOH ===》Fe(OH)3 + 3 NaNO3
A football is moving upwards towards its peak after having been booted by the punter.
Answer:
draw a square with an errow pointing down
Explanation:
1. What is the symbol for atomic mass? What are the units of atomic mass in terms of atoms? 2. What is the symbol for molar mass? What are the units of molar mass? 3. What is the atomic mass of iron, with units? 4. What is the molar mass of iron, with units? 5. What is formula mass? What are the units of formula mass? 6. What is the formula mass of sodium bicarbonate, with units? 7. What is the molar mass of sodium bicarbonate with units? 8. What is the molar mass of water? 9. What is the molar mass of ammonia, NH3? 10. What is the molar mass of lithium oxide? 11. What is the molar mass magnesium bicarbonate? 12. What is the molar mass of cobalt(III) carbonate?
i am NOT gonna read all of that
PLEASE Answer asap! Compare two periodic families below. You must include at least two facts about each family. You may use any description of properties or periodic trends to help you.
Answer:
The alkali metals/group 1 are recognized as a group and family of elements. These elements are metals. Sodium and potassium are examples of elements in this family. Hydrogen is not considered an alkali metal because the gas does not exhibit the typical properties of the group. The largest family of elements consists of transition metals/group 3-12/group 3a. The center of the periodic table contains the transition metals, plus the two rows below the body of the table (lanthanides and actinides) are special transition metals. Even though both are metals, transition metals have higher melting points; they have higher density; they are less reactive with water; they react and form ions with different charges, but Group 1 metals only form 1+ ions. (Hope the is helpful! You can reword it if you want...)
What do greenhouse gases (CO2) do to the atmosphere?
Answer:
they causes climate change by trapping heat and also they contribute to respiratory diseases from smog and air pollution
Answer:
They add C02 to our atmosphere which can give plants and soils more CO2. It can also make our earths temperature change a ton!
Explanation:
Greenhouse gases produce an increase in the average surface temperature of the earth over time.
what is the order in which types of elements are found as you move from left to right across a period? metals, nonmetals, and metalloids?
Answer:
metals, metalloids, nonmetals
Explanation:
a p e x, just took the quiz
The order is metals, metalloids, non metals in which elements are found as you move from left to right across a period.
MetalsWhen we move from left to right across a period Metals are located on the left hand side of the periodic table. Metals have high thermal conductivity.
MetalloidsWhen we move from left to right across a period Metalloids are located between metals and nonmetals. Metalloids are present p-block elements. Metalloids have good thermal conductivity.
NonmetalsWhen we move from left to right across a period Nonmetals are located on the right hand side of the periodic table. Non metals have low melting point and boiling point. Non metals have low thermal conductivity.
Thus, from conclusion we can say that the order is metals, metalloids, non metals in which elements are found as you move from left to right across a period.
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Which molecule is butyne?
H,C CH,
ОА. С=С
н Н
В.
н нннн
| | | | |
Ос. Н-с-с-с-с-с-н
1 І
Н Н Hн Н
Hн
| |
OD. н-c=C-с-с-н
ТІ
Hн
Answer:
H,C CH,
Explanation:
explain why copper 2 oxide is a base although it does not turn litmus paper to blue
Answer:
See explanation
Explanation:
Copper II oxide is a base but not an alkali. An alkali is a soluble base. Since Copper II oxide is not soluble in water then it is not an alkali.
Let us recall that the change of colour of litmus with an alkali requires the presence of water. In the absence of water, solid Copper II oxide does not turn red litmus paper blue.
The ability to turn red litmus paper blue is commonly observed with alkalis and Copper II oxide is not an alkali.
Also recall that since Copper II oxide is not soluble, hydroxide ions are absent hence Copper II oxide does not turn red litmus paper blue.
What is the volume of a balloon that contains 3.7 moles of helium at 75°C
and 5.1 atm?
Answer: your question is easy 21 L
By using ideal gas law the amount of volume will be 21 L.
What is ideal gas law?
The general gas equation, commonly known as the ideal gas law, is the state equation of a hypothetical ideal gas.
Calculation of volume by using ideal gas law.
Given data:
P = 5.1 atm
n = 3.7 moles
T = 75°C (273 + 75) = 348 K
V = ?
Put the given data in ideal gas law.
PV = nRT
V = nRT / P
V = 3.7 × 8.31 × 348 / 5.1
V = 2098
V = 21 L
Therefore, By using ideal gas law the amount of volume will be 21 L.
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How many grams is 2.393 x 10^24 atoms of O?
70.45 g O
140.9 g O
63.58 mole O
63.58 g O
Answer:
63.58 g O
Explanation:
To calculate the mass of O atoms, the number of moles of O atoms are needed and can be calculated as follows:
n (no. of moles) = nA ÷ 6.02 × 10^23
n = 2.393 x 10^24 ÷ 6.02 × 10^23
n = 0.398 × 10^ (24-23)
n = 0.398 × 10^1
n = 3.98moles.
To calculate the mass of Oxygen, we use the following formula:
moles = mass/molar mass
Molar mass of O = 16.
3.98 = m/16
m = 3.98 × 16
m = 63.68grams of Oxygen.
Answer:
Solution given:
[tex]1 mole \:of O=6.023×10^{23} atoms[/tex]
1 mole of O =16g
we have
[tex] 6.023×10^{23} atoms\: of O=16g[/tex]
now
[tex] 2.393 × 10^{24} atoms\: of \:O\\=16/6.023×10^{23}*2.393 x 10^{24}g\\=63.57g[/tex]
63.57g is a required mass of O.
Which of the following is an indication that a substance has undergone a chemical change?
A.
No new product has been formed.
B.
The color of the substance has not changed.
C.
The original constitute has not changed.
D.
The molecular structure has changed.
Answer:
D.
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9. In a laboratory experiment, two groups of rats are fed two different fatty acids as their sole source of carbon for a month. The first group gets heptanoic acid (7:0), and the second gets octanoic acid (8:0). After the experiment, a striking difference is seen between the two groups. Those in the first group are healthy and have gained weight, whereas those in the second group are weak and have lost weight as a result of losing muscle mass. What is the biochemical basis for this difference
Answer:
Beta oxidation of the odd chain heptanoic acid will produce propionyl CoA, which can be converted in several steps to oxaloacetate. Oxaloacetate is the starting material for the process of gluconeogenesis (producing glucose from noncarbohydrate precursors). This gives extra glucose to the first group, so they will be healthier and gain weight. Beta oxidation of the even chain will entirely be oxidized to acetyl Co-A (one of the precursors of the TCA cycle). This will lead to a large excess of ketone bodies instead of glucose for energy, which will lead to the second group being weak and losing weight.
Explanation:
The difference is seen in having an odd chain and an even chain of fatty acids and how they are broken down and used in the body.
The shape of the directly sunlit portion of the Moon as viewed from
Earth
your answer:
lunar phases