Answer: 30mL
Explanation:
A 20-milliliter sample of a gas is at 546 K and has a pressure of 6.0 atmospheres. If the temperature is changed to 273 K and the pressure to 2.0 atmospheres, the new volume of the gas is 30mL.
What is volume?Because gases occupy their containers, overall volume is identical to the container's internal volume. Liquids are typically measured using containers in which the volume or internal form of the container is indicated.
The volume of typical solid forms may be calculated using formulae. Another way to calculate the capacity of a solid would be to calculate how so much liquid something displaces.
P₁×V₁/T₁=P₂×V₂/T₂
substituting all the given values in the above equation, we get
6.0×20/ 546=2.0×V₂/ 273
V₂= 30mL
Therefore, 30mL is the final volume.
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What are the 4 limiting factors
It’s in the image~
Answer:
I'm pretty sure you have it correct
How do you obtain oxide from a mixture?
By direct heating of an element with oxygen : many metals and non-. metals burn rapidly when heated in oxygen or air producing their oxides e.g.
the cl-cl bond will react more readily, because it has a
The Cl-Cl bond will react more readily because it has a lower bond energy than the C- H bond.
What is bond energy?The bond energy refers to the energy required to break the bonds that links two atoms together in a molecule. It is equal to the energy that is evolved when the bond is formed.
In comparing the Cl-Cl bond with the C-H bond, we will find out that the Cl-Cl bond will react more readily because it has a lower bond energy than the C- H bond.
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Predict the products
Answer:
1. No reaction.
2. ZnCl₂ + H₂
3. CaCl₂ + H₂
Explanation:
1. Cu + HCl —> ___
From the reactivity series of metals, H is higher that Cu in the series and so, Cu can not displace H from solution.
Therefore, no reaction will occur.
2. Zn + HCl —> ___
Zn is higher than H in the activity series so, it will displace H from acid solution to produce hydrogen gas, H₂.
The balanced equation is given below:
Zn + 2HCl —> ZnCl₂ + H₂
3. Ca + HCl —> ___
Ca is higher than H in the activity series so, it will displace H from acid solution to produce hydrogen gas, H₂.
The balanced equation is given below:
Ca + 2HCl —> CaCl₂ + H₂
What mass of oxygen is required to react completely with the burning of 25.0 g of hexane?
Answer:
88.2
Explanation:
*
The prevailing weather patterns of a region
Answer:
noun. the composite or generally prevailing weather conditions of a region, as temperature, air pressure, humidity, precipitation, sunshine, cloudiness, and winds, throughout the year, averaged over a series of years. a region or area characterized by a given climate: to move to a warm climate.
Explanation:
due in a bit! please help tysm btw!
Answer:
Unbalanced
Explanation:
please answer as soon as possible if you can
Answer:
Second one
Explanation:
How many moles are in 120.g of ar?
Answer:
3 moles of Argon
Explanation:
The molar mass for argon is 39.948 g/mol
[tex]\frac{120g}{39.948g/mol} = 3.004molesAr[/tex]
what are 5 functions of proteins
if a gas is pumped from a smaller container to a container that is twice size, what happens to the pressure of the gas?
8. A sample of 16.0g of a metal oxide, MO, is reduced to 12.8g of the metal, M.
What is the relative atomic mass, Ar, of M?
A 32 B 64 C 80 D 128
Answer:
B 64
Explanation:
i think b 64 is right answer.......
The relative atomic mass is 64g and the metal is copper(Cu).
What is relative atomic mass?The weighted average of the masses of an element’s isotopes in comparison to the mass of a carbon-12 atom is known as relative atomic mass (Ar).The ratio of the average mass of atoms of a chemical element in a given sample to the atomic mass constant is defined as relative atomic mass (Ar) or atomic weight.The mole ratio for M and O in the compound MO is 1:1.
The mass of oxygen in the 16g compound is 16.0 - 12.8 = 3.2g.
The relative atomic mass of O is 16g. The number of moles of O in the 3.2g is 3.2/16 = 0.2.
Since the M and O gave the same number of moles in the MO, that is their mole ratio is 1:1, then the number of moles of the M in the MO is also 0.2.
Therefore, if 0.2 mole if M weighs 12.8g, then 1 mole of M will weigh 1 x 12.8/0.2 = 64g/mole.
The mole of an element is its relative atomic mass.
Therefore, the relative atomic mass of M is 64g.
Hence, option B is the correct answer.
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2 H2 + O2 -> 2 H20
if 32 grams of oxygen reacts with sufficient hydrogen to make 36 grams of water, how many grams of hydrogen will be needed?
Answer:
8
Explanation:
since both hydrogen and water has the same numbers of mole. then as we know that mole = mass/molar mass, 2=mass/2 therefore mass= 4g
Identify the mystery metal using the formula for density (Density = Mass/Volume). The object has
a mass of 95 g and a volume of 4.9 cm3.
O Silver 10.5 g/cm3
O Mercury 13.5 g/cm3
O Gold 19.3 g/cm3
O Copper 9.0 g/cm3
ASAP
Which best describes water?
A- an element
B- a compound
C- a homogeneous mixture
Answer:its B
Explanation:
You welcome
How many moles of O are there in 41.8 grams of O?
Answer:
[tex]\boxed {\boxed {\sf 2.61 \ mol \ O}}[/tex]
Explanation:
To convert from grams to moles, the molar mass is used. This number tells us the grams per mole of a substance. It can be found on the Periodic Table. Look for oxygen.
Oxygen (O): 15.999 g/molUse this number as a ratio.
[tex]\frac {15.999 \ g \ O }{ 1 \ mol \ O }[/tex]
Multiply by the given number of moles.
[tex]41.8 \ g \ O *\frac {15.999 \ g \ O }{ 1 \ mol \ O }[/tex]
Flip the fraction so the grams of oxygen cancel.
[tex]41.8 \ g \ O *\frac { 1 \ mol \ O }{ 15.999 \ g \ O}[/tex]
[tex]41.8 *\frac { 1 \ mol \ O }{ 15.999 }[/tex]
[tex]\frac { 41.8 \ mol \ O }{ 15.999 }= 2.61266329146 \ mol \ O[/tex]
The original measurement of grams has 3 significant figures (4, 1, and 8). Our answer must have the same. For the number we calculated, that is the hundredth place. The 2 in the thousandth place tells us to leave the 1.
[tex]2.61 \ mol \ O[/tex]
41.8 grams of O has 2.61 moles of oxygen.
Classify the following as a chemical or
physical property:
Aluminum is a shiny, silver color.
chemical
physical
Answer:
physical
Explanation:
19 What is the "skin" of the cell?
Answer:
d cell membrane:)
Explanation:
I’ll really appreciate it if you help me out on this one .
Answer:
i'd say D
Explanation:
the dependent variable is the change that happens
what is the equivalent weight of sodium trioxocarbonate (IV) in the reaction between Hydrochloric acid and sodium trioxocarbonate (IV)?
Correct answer gets brainliest. This is urgent.
Answer:
Standard acid-base reaction in two stages:
Na2CO3 + HCl → NaHCO3 +NaCl
NaHCO3 + HCl → NaCl + CO2 + H2O
If only a small quantity of acid is added (and the overall solution remains above pH 7), the reaction would stop at stage 1 and you’d be left with an aqueous solution of sodium chloride and sodium bicarbonate. Adding more acid would lead to the bicarbonate being converted to carbon dioxide and water, with the CO2 coming out of solution as a gas and more sodium chloride being produced.
to which grop and period do the following elements belong carbon,neon,aluminium,potassium ,calcium,sulphur
Answer:
C:4A second period Ne:8A second period Al:3A third period K:1A fourth period Ca:2A fourth S:6A third period
Explanation:
There are various kind of elements that are present in periodic table. Some elements are harmful, some are radioactive, some are noble gases. Therefore, with the help of periodic table we can locate the element's position.
What is periodic table?Periodic table is a table in which we find elements with properties like metals, non metals, metalloids and radioactive element arranges in increasing atomic number.
Periodic table help a scientist to know what are the different types of elements are present in periodic table so that they can discover the new elements that are not being discovered yet.
carbon belongs to period 2 and group 14
neon belongs to period 2 and group 18
aluminium belongs to period 3 and group 13
potassium belongs to period 4 and group 1
calcium belongs to period 4 and group 2
sulfur belongs to period 3 and group 16
Therefore, with the help of periodic table we can locate the element's position.
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which has the strongest intermolecular forces
Answer:
I think it is B
Explanation:
Answers: A
Explanation: just took the quiz on usatestprep
Gopher tortoises live on dry land. They live in large holes that they dig in the soil. Which statement gives the best explanation of how this behavior aids in soil formation?
A. It hardens the soil, allowing less water to reach the rocks underground.
B. It causes weathering of the rocks, as the tortoise breaks the rocks into smaller pieces.
C. It causes weathering of the rocks, as the tortoise breaks the rocks into smaller pieces.
D. It loosens and mixes the soil, increasing air in the soil and the ability to drain water.
Answer:
It moves rocks above ground, where they are exposed to more water and wind.
How do you calculate the volume of air displaced by a balloon? Is there a formula? also, how do you calculate the mass of air displaced by balloon?
Score of 0.500 M solution of a weak acid,[H+] was measured as 4.02× 10 to the -3rdM, what is the dissociation constant?
Answer:
Explanation:
1.0
⋅
10
−
7
Explanation:
Start by writing a balanced chemical equation for the partial ionization of the acid
HA
(aq]
+
H
2
O
(l]
⇌
A
−
(aq]
+
H
3
O
+
(aq]
Notice that you have
1
:
1
mole ratios across the board. For every mole of acid that ionizes in aqueous solution, you get one mole of its conjugate base and one mole of hydronium ions,
H
3
O
+
.
In other words, the equation produces equal concentrations of conjugate base and hydronium ions.
Now, you can use the pH of the solution to calculate the equilibrium concentration of the hydronium ions.
pH
=
−
log
(
[
H
3
O
+
]
)
⇒
[
H
3
O
+
]
=
10
−
pH
In your case, the pH of the solution is equal to
4
, which means that you'll have
[
H
3
O
+
]
=
10
−
4
M
By definition, the acid dissociation constant,
K
a
, will be equal to
K
a
=
[
A
−
]
⋅
[
H
3
O
+
]
[
HA
]
The expression for the acid dissociation constant is written using equilibrium concentrations. So, if the reaction produced a concentration of hydronium ions equal to
10
−
4
M
, it follows that it also produced a concentration of conjugate base equal to
10
−
4
M
.
Because the initial concentration of the acid is considerably higher than the concentrations of the conjugate base and hydronium ions, you can approximate it to be constant.
This means that the acid dissociation constant for this acid will be
K
a
=
10
−
4
⋅
10
−
4
0.100
=
1.0
⋅
10
−
7
This is the underlying concept behind an ICE table
HA
(aq]
+
H
2
O
(l]
⇌
A
−
(aq]
+
H
3
O
+
(aq]
I
0.100
0
0
C
(
−
x
)
(
+
x
)
(
+
x
)
E
0.100
−
x
x
x
Here
x
represents the equilibrium concentration for the conjugate acid and hydronium ions. Since you know that
x
=
10
−
4
, you will have
K
a
=
10
−
4
⋅
10
−
4
0.100
−
10
−
4
Once again, you can use
0.100
−
10
−
4
=
0.0999
≈
0.100
to get
K
a
=
10
−
8
0.100
=
1.0
⋅
10
−
7
1)Where are irons in our body ?
2) Is there some difference in the way metals and non– metals react with acid ?
Answer:
iron is found in the red blood cells of your blood called hemoglobin and in muscle cells called myoglobin. Hemoglobin is essential for transferring oxygen in your blood from the lungs to the tissues.
2( non- metals generally do not react with acids but metals react with acids and produce hydrogen gas that burns with a 'pop' sound. You must have noticed that copper does not react with dilute hydrochloric acid even on heating but it reacts with sulphuric
Explain why vigorous exercise causes the heart rate to increase and you to also breathe faster.
Answer:
When you are exercising, your muscles need extra oxygen—some three times as much as resting muscles. This need means that your heart starts pumping faster, which makes for a quicker pulse. Meanwhile, your lungs are also taking in more air, hence the harder breathing.
Explanation:
Help which one will it be
Answer:
D
Explanation:
Answer:
the answer is D I did that one in 5th grade
Find the mass of a single one of the molecules or ionic compounds listed below. You must show your work in the correct format and include units in your answer to receive credit. Round your final answer to the nearest 0.1.
(YOU DONT HAVE TO CIRCLE WETHER ITS MM OR FM)
how many atoms are in 0.25 moles of nitrogen
Answer:
0.25 mole of NO2 contains 0.25 mole 'N'
one mole contains 6.023 x 10 ^23 atoms
0.25 mole II------------------------------>?
= 0.25 x 6.023 x10^23 = 1.5 x 10^23 atoms
Explanation: