When the pressure is 1.22 atm, a sample of hydrogen gas has a volume of 1.88L. What is its volume if the pressure is increased to 1.45 atm?
Answer:
1.58 L
Explanation:
Use Boyle's law, which is defined as
p1v1 = p2v2
In this case we're solving for V2 because the rest of the variables are given.
p1 = 1.22 atm
v1 = 1.88L
p2 = 1.45 atm
v2 = ?
p1v1 = p2v2
(1.22 atm)(1.88L) = (1.45 atm)(v2)
v2 = (1.22 atm)(1.88L) ÷ (1.45 atm) = 1.58 L
What is the process when enzymes (chemicals) in your saliva help breaks down food while chewing?
A. Mechanical digestion
B. Chemical digestion
C. Both
D. None of the above
Answer:
B. Chemical Digestion
Explanation:
As food travels from your mouth into your digestive system, it's broken down by digestive enzymes that turn it into smaller nutrients that your body can easily absorb.
A _ is a substance with a pH greater than 7
BASIC
bc here:
1,2,3,4,5,6. 7. 8,9,10
The ones in bold are acids.
7 is neutral.
The ones in italic are basic.
How much 0.05 M HCl solution can be made by diluting 2L of 10 M HCl?
Answer:
400 L
Explanation:
As this problem deals with a dilution process, we can use the following formula:
C₁V₁=C₂V₂Where subscript 1 stands for the concentrated concentration and volume, while 2 stands for the diluted values. Meaning that in this case:
C₁ = 10 MV₁ = 2 LC₂ = 0.05 MV₂ = ?We input the data:
10 M * 2 L = 0.05 M * V₂And solve for V₂:
V₂ = 400 LCan someone give me an example of a synthesis reaction that is NOT a redox reaction? Pls don't send links. Thanks
Well an example is how hydrogen and oxygen react to form water, you could use that. We know that when two nonmetals react more than one product is possible. Sulfur and oxygen react to form sulfur dioxide or sulfur trioxide.
Hope this helps.
Which equation represents a neutralization reaction?
A. NaOH + HCl → NaCl + H2O
B. 2 Na + 2 H2O → 2 NaOH + H2
C. AgNO3 + NaCl → AgCl + NaNO3
D. Fe + CuSO4 → FeSO4 + Cu
The equation represents a neutralization reaction is : -
A. NaOH + HCl → NaCl + H2O
In neutralization reaction acid and base reacts to form salt and water,
here,
acid - HCLbase - NaOH Salt - NaClwater - H2OThe equation NaOH + HCl → NaCl + H2O represents neutralization reaction.
What is neutralization reaction?The process usually happens when an acid combines with just a base to create water and salt is known as neutralization. Solid acids, solid bases, solid salts, and water all have net ionic equations in neutralization reactions.
The given equation is NaOH + HCl → NaCl + H2O.
Here, NaOH = Base, HCl = acid and NaCl = salt.
Therefore, the given equation is neutralization reaction.
To know more about neutralization reaction.
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Determine the mass of MgCl2 needed to create a 100. ml solution with a concentration of 3.00 M.
Explanation:
[tex]1000ml \: contain \: 3 \: moles \\ 100 \: ml \: will \: contain \: ( \frac{100 \times 3}{1000} ) \: moles \\ = 0.3 \: moles \\ RFM = 95 \\ 1 \: mole \: weighs \: 95 \: g \\ 0.3 \: moles \: weigh \: ( \frac{(0.3 \times 95)}{1} \: g \\ = 28.5 \: g \: of \: magnesium \: chloride[/tex]
Which is an
example of a renewable energy resource?
Answer:
Wind power
Explanation:
What does the VSEPR theory predict?
A. Valence electrons will pair up with electrons from another atom.
B. Valence electron pairs are transferred from a central atom to bonding atoms.
C. Valence electron pairs will move as far apart from each other as possible.
D. Valence electrons around a nucleus will pair up whenever possible.
I believe it's (C). Valence electron pairs will move as far apart from each other as possible.
Explanation:
The formal definition that is the basis for VSEPR is as follows:
Pairs of electrons in the valence shell of a central atom of a molecule repel each other and take up positions as far apart as possible.
A 50.5 L flask contains 3.25 mol of an unknown gas at 288.6 K, what is the pressure of
this gas?
Answer:
1.52atm is the pressure of the gas
Explanation:
To solve this question we must use the general gas law:
PV = nRT
Where P is pressure in atm = Our incognite
V is volume = 50.5L
n are moles of gas = 3.25moles
R is gas constat = 0.082atmL/molK
And T is absolute temperature = 288.6K
To solve pressure:
P = nRT / V
P = 3.25mol*0.082atmL/molK*288.6K / 50.5L
P = 1.52atm is the pressure of the gas
how long ago did the Atlantic Ocean separate Canada from Ireland....plz answer I have no idea lol
Answer:
Around 150 million years ago
Explanation:
The Atlantic ocean was formed during the Jurassic period
Answer:
200 millon years ago
Explanation: please give me brainliest
need help on dis plz that would be big help
Identify the base in this acid-base reaction: 2 upper H upper C subscript 2 upper H subscript 3 upper O subscript 2 plus upper M g (upper O upper H) subscript 2 right arrow upper M g (upper C subscript 2 upper H subscript 3 upper O subscript 2) subscript 2 plus 2 upper H subscript 2 upper O. HC2H3O2 Mg(OH)2 Mg(C2H3O2)2 H2O
Answer:
Mg(OH)2
Explanation:
Magnesium hydroxide is the base since it has hydroxyl ions.
Mg(OH)₂ is the base in this acid-base reaction.
What is a Base?This can be defined as a chemical substance which donates electrons, accepts protons, or releases hydroxide (OH-) ions in aqueous solution.
Mg(OH)₂ has the presence of hydroxide (OH-) ions in its compound which was why it was chosen as the most appropriate choice.
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you had a 5 gram sample , how much of the original substance would remain after 1 half- life?
what is the half life though?
Which wave has the highest frequency?
1
2
3
4
no link or i will report
Answer:
4
Explanation:
because number 4 moves continuous
2 Na + Cl ---> 2NaCl
how many grams of NaCl can be produced if 33 grams of Na reacts with excess Cl2 and STP?
a. 170 g
b. 120 g
c. 84 g
d. 72 g
If 65 grams is ACTUALLY produced, what is the percent yield of NaCl in the above problem?
a. 54.2%
b. 38.2%
c. 77.4%
d. 90.3%
Answer:
1. d. 84g
2. c. 77.4%
Explanation:
1. Based on the reaction 2 moles of Na produce 2 moles of NaCl.
The moles of Na (22.99g/mol) in 33g are:
33g * (1mol / 22.99g) = 1.435 moles Na = 1.435 moles NaCl must be produced.
The mass of NaCl is (Molar mass: 58.44g/mol):
1.435moles * (58.44g / mol) = 84g
d. 84g
2. Percent yield is defined as 100 times the ratio between actual yield (65g) and theoretical yield (84g). The percent yield is:
65g / 84g * 100 =
c. 77.4%
Which of the following is a pure substance?
A) Soda
B) Trail Mix
C) Gold
D) Milk
Answer:Gold
Explanation: it is a pure element on the periodic table
~enjoy the rest of your day
Use the following periodic table to identify the letter(s) that match each of the statements below.
(Each element may be used once, more than once or not at all)
Answer:
l and t
Explanation:
because they are in group one
Answer:
L & T
since are found in the same group.
How many atoms are in 1.204x10^22 moles of arsenic?
Answer:
0.02 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
We have
[tex]n = \frac{1.204 \times {10}^{22} }{6.02 \times {10}^{23} } \\ = 0.02[/tex]
We have the final answer as
0.02 molesHope this helps you
.
Determine the temperature of .084 moles of CO2 gas at 790 mmHg
which occupies a volume of 2.1L
Answer:
Explanation:
Molar volume at STP = 22.4L
So 0.084 mole of CO2 at STP has volume of 22.4*0.084 = 1.882L
Combined Gas Law: P1V1/T1 = P2V2/T2
760*1.882/273 = 790*2.1/Temperature
Temperature = 790*2.1*273/760/1.882
= 316.6K
Carbon is often called "the building block of life". If your body is 18% carbon, what mass
of this element is present in your body?
Answer:
oxygen
Explanation:
I am pretty sure it is that but you should still check
Determine the mass of 2.75 moles of CaSO4. Record your work and your answer.
Explanation:
[tex]RFM \: = 160 \: g \\ 1 \: mole \: weighs \: 160 \: g \\ 2.75 \: moles \: weighs \: \frac{2.75 \times 160}{1} g \\ = 440 \: g[/tex]
Ice that contains a small amount of dissolved air is an example of what type of solution?
Answer:
a gas dissolved in a solid
Explanation:
The ice that comprise of small amount of dissolved air represent the type of soluton that have a solid dissolved in a gas.
What is gas?Gas could be considered as the one of the four fundamental states of matter.
A pure gas should be made of individual atoms, elemental molecules that consist from one type of atom, or compound molecules that consist of a variety of atoms.
A gas mixture could be in the form of air that comprise a variety of pure gases.
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Claim, Evidence, Reasoning : It is said that early 20th-century Italian tenor Enrico Caruso could
shatter glass with his high notes.There is no evidence to confirm this claim,
but MythBusters' Jamie Hyneman and Adam Savage tested the physics
behind this claim and found that it was possible. Write a scientific
explanation that explains what happens to cause the glass to break.
Answer: It´s question of resonance
Explanation: I think in case of crystal glass it have
certain structure. There are certain frequencies crystal can vibrate.
High sound frequencies resonate, also give energy to structure vibrations and it vibrates more strongly until structure breaks up.
A sample of radon gas has a volume of 0.650 L at a temperature of -55.0 C. What volume will the gas occupy at 40.0 C, assuming constant pressure?
Answer:
0.933 L
Explanation:
Since the pressure is the same, we use the equation [tex]\frac{V_{1}}{T_{1} } = \frac{V_{2} }{T_{2} }[/tex]
V = Volume
T = Temperature
Since we are given the temperature in Celsius, we need to convert it to Kelvin by adding 273:
-55.0 + 273 = 218
40.0 + 273 = 313
[tex]\frac{0.650}{218} = \frac{x}{313}[/tex]
[tex]0.933 = x[/tex]
The gas will occupy a volume of 0.933 L.
(Side note - If the temperature increases, the gas will want to expand, leading to a higher volume.)
Structure of co2..................................
Answer:
Carbon dioxide (chemical formula CO 2) is an acidic colourless gas with a density about 53% higher than that of dry air. Carbon dioxide molecules consist of a carbon atom covalently double bonded to two oxygen atoms.
In CO2, the Carbon atom is in the central position as it is the least electronegative atom in the molecule. Two Oxygen atoms are located on the terminals where both these atoms share electrons and form bonds with the central Carbon atom.
Lewis structure of CO2 given in the attached image:
The intermolecular forces present between two molecules ofCH3-CH2-CH2-CH2-CH2-O-H are ________.
Answer:
Hydrogen Bonding!
This is because of two reasons:
1. Hydrogen is attatched to a very electronegative atom.
2. The electronegative atom it is attatched to has a lone pair.
Hope this helps!
I would really appreciate if you mark me brainliest as I have been trying to get there for a veryyy long time now :)
A ______ in medicine is a form of scientific argumentation in which evidence is used to rule out claims and support the best conclusion.
fill in the blank
Answer: Scientific reasoning
Explanation:
A scientific reasoning can be defined as the justification which connects the evidence with that of the claim and it rules out all those claims that are not supported by any evidence. It explains the fact that how evidence can support a claim and scientifically acceptable conclusion can be drawn. An argument is always based on one or more claims which can either be true or evidentially proved.
A 1.0 mol sample of which of the following compounds has the greatest mass?
A) NO
B) NO2
C) N2O
D) N2O5
Answer:
D) N2O5
Explanation:
The molar mass of a substance is defined as the mass of this substance in 1 mol. To solve this question we must find the molar mass of each option:
Molar mass NO:
1N = 14g/mol*1
1O = 16g/mol*1
14+16 = 30g/mol
Molar mass NO2:
1N = 14g/mol*1
2O = 16g/mol*2
14+32 = 46g/mol
Molar mass N2O:
2N = 14g/mol*2
1O = 16g/mol*1
28+16 = 44g/mol
Molar mass N2O5:
2N = 14g/mol*2
5O = 16g/mol*5
28+80 = 108g/mol
That means the compound with the greatest mass is:
D) N2O5Cyclohexane (C6H12) is one of the components of crude oil. Which shows the
balanced combustion reaction for cyclohexane?
Answer:
D. C6H12+9O2 -> 6CO2+6H2O+heat
Explanation:
got it right on ap ex
The combustion reaction is the reaction between reactants and oxygen. The balanced combustion reaction for cyclohexane is, C₆H₁₂ + 9O₂ → 6CO₂ + 6H₂O + heat. Thus, option D is correct.
What is a combustion reaction?A type of reaction that includes the release of energy and heat when the oxygen reacts chemically with the reactant. The presence of oxygen as one of the reactants is a characteristic property of the combustion reaction.
As a result of the reaction carbon dioxide and water is produced along with heat in the reaction. The balanced combustion reaction of cyclohexane (C₆H₁₂) is given as,
C₆H₁₂ + 9O₂ → 6CO₂ + 6H₂O + heat
Here, the number of carbon is six on both sides, twelve hydrogen on both sides, and eighteen oxygen on the left and right sides of the reaction.
Therefore, option D. C₆H₁₂ + 9O₂ → 6CO₂ + 6H₂O + heat is the balanced combustion reaction.
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i just need the answers!!!
Answer:
16:A
17:C
18:A
19B
Explanation: