Answer:
the cycle of water and how it evaporates with energy from the sun and the droplets are stored in clouds which is condensation and when it rains or snows those are forms of precipitation
Explanation:
Answer:
it shows the continuous movement of water within the earth and atmosphere
Part 1. determine the molar mass of a 0.458-gram sample of gas having a volume of 1.20 l at 287 k and 0.980 atm. show your work.
part 2. if this sample was placed under extreme pressure, describe how the actual volume would compare to the predicted volume. explain your answer.
The molar mass of a substance can be calculated by first calculating the number of moles using ideal gas law equation:
PV = nRT
Where;
P = pressureV = volumeT = temperatureR = gas law constantn = no of moles0.98 × 1.2 = n × 0.0821 × 287
1.18 = 23.56n
n = 1.18/23.56
n = 0.05moles
mole = mass/molar mass
0.05 = 0.458/mm
molar mass = 0.458/0.05
molar mass = 9.15g/mol
Therefore, the molar mass of 0.458-gram sample of gas having a volume of 1.20 l at 287 k and 0.980 atm is 9.15g/molIf this sample was placed under extreme pressure, the volume of the sample will decrease.Learn more about gas law at: https://brainly.com/question/12667831
Why is carbon dioxide called a gas and not vapour?
Explanation:
CO2 is called as gas because it exist in single thermodynamics state i.e CO exist in gases state only at room temperature.
what are the properties of aluminium and their use
Answer: Answers are in bulleted lists.
Explanation: Aluminum...
has a low densityis non-toxichas a high thermal conductivityhas excellent corrosion resistancecan be easily cast, whether it's machined or formed.Uses:
Aeroplane PartsCansWindow framesBeer kegsFoils Kitchen utensilsHave a great day! :)
The number of protons and neutrons in an atom is that atoms __ number.
For 480. 0 mL m L of pure water, calculate the initial pH p H and the final pH p H after adding 2. 0×10−2 mol m o l of HCl H C l
Given that the volume of the pure water is 480 mL and the mole of HCl added to the water is 2×10¯² mole. Therefore, the Initial and final pH of the water are:
1. The initial pH of the pure water is 7
2. The final pH of the water is 1.38
What is pH ?This is simply a measure of the acidity / alkalinity of a solution.
The pH measures the hydrogen ion concentration while the pOH measures the hydroxide ion concentration
pH scaleThe pH scale is a scale that gives an understanding of the variation of the acidity / alkalinity of a solution.
The scale ranges from 0 to 14 indicating:
0 to 6 indicates acid 7 indicates neutral (pure water) 8 to 14 indicate basicHow to determine the molarity Volume = 480 mL = 480 / 1000 = 0.48 L Mole of HCl = 2×10¯² mole Molarity =?Molarity = mole / Volume
Molarity = 2×10¯² / 0.48
Molarity = 4.17×10¯² M
Dissociation equationHCl(aq) —> H⁺(aq) + Cl¯(aq)
From the balanced equation above,
1 mole of HCl contains 1 mole of H⁺
Therefore,
4.17×10¯² M HCl will also contain 4.17×10¯² M H⁺
How to determine the pH Hydrogen ion concentration [H⁺] = 4.17×10¯² MpH =?pH = –Log H⁺
pH = –Log 4.17×10¯²
pH = 1.38
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can someone pls help me
Answer:
the picture is blurd
Explanation:
Name two elements that are extracted from
their compounds by electrolysis.
Answer:
Hydrogen and oxygen
Explanation:
This is the most common compound water
When water goes through electrolysis it produces two elementsH_2 and O_2The reaction is given by
H_2O-->H_2+O_2Answer:
Hydrogen and helium is the answer
How many moles of O2 are required for the complete reaction of 1.60 moles of C2H4 to form CO2 and H2O? Use the balanced equation: C2H4 + 3O2 --> 2CO2 + 2H2O
113 mol
4.80 mol
48.0 mol
0.64 mol
Answer:
4.80 mol is the answer
Explanation:
please mark me as brainlist..
4.8 moles
Balanced equation: C₂H₄ + 3O₂ --> 2CO₂ + 2H₂O
C₂H₄ : 1.60 molesuse molar ratio:
3O₂ : C₂H₄
3 : 1
moles of O₂ : 3 * 1.6 = 4.8 moles
What's the volume of 0.2 mol of hydrogen at STP.
5.6 L
22.4 L
4.48 L
2.24 L
Answer:
22.4
Explanation:
Briefly explain the two ways Avogadro's number was calculated.
The value of Avogadro's number was obtained by dividing the charge of a mole of electrons by the charge of a single electron which is equal to 6.02214154 x 1023 particles per mole.
The most common used way is
n=Charge of one mole of atom /charge of one single atomThere can be another derived way
No of molecules=No of moles ×Avagadro noAvagadro no=No of molecules/No of molesA chemistry teacher adds 50. 0 mL of 1. 50 M H2SO4 solution to 200 mL of water. What is the concentration of the final solution? Use M subscript i V subscript i equals M subscript f V subscript f. 0. 300 M 0. 375 M 6. 00 M 7. 50 M.
The concentration of the final solution after mixing water into the H₂SO₄ is 0.375 M.
How do we calculate the concentration?Concentration in terms of molarity will be calculated by using the below formula as:
M₁V₁ = M₂V₂, where
M₁ = molarity of H₂SO₄ = 1.50 M
V₁ = volume of H₂SO₄ = 50 mL
M₂ = molarity of water = ?
V₂ = volume of water = 200 mL
On putting all values on the above equation, we get
M₂ = (1.50)(50) / (200) = 0.375 M
Hence option (2) is correct.
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Which mineral reacts readily with cool, dilute hydrochloric acid to produce visible bubbles of carbon dioxide gas?.
Answer:
The acid reacts with the mineral to release CO2 gas that is bound into the crystal as carbonate ion.
Explanation: i got it corrcet
Calculate the cell potential for the galvanic cell in which the reaction
Al(s)+Au3+(aq)↽−−⇀ Al3+(aq)+Au(s)
Al
(
s
)
+
Au
3
+
(
aq
)
↽
−
−
⇀
Al
3
+
(
aq
)
+
Au
(
s
)
occurs at 25 ∘C
25
∘
C
, given that [Al3+]=0. 00170 M
[
Al
3
+
]
=
0. 00170
M
and [Au3+]=0. 795 M
[
Au
3
+
]
=
0. 795
M
Explanation:
those to arrows between states which makes the chemical unstable right now so you need to change both those signs good luck!
Some bacteria live in the roots of plants like soybeans and peas.
Bacteria growing on plant roots.
What is the role of these bacteria in the nitrogen cycle?
to absorb nitrogen-containing compounds from the soil
to release free nitrogen into the atmosphere
to break down nitrogen-containing compounds in dead organisms
to convert free nitrogen into usable nitrogen
70 points!
Answer:
to release free nitrogen into the atmosphere. This is the answer.
Answer:
to convert free nitrogen into usable nitrogen
Explanation:
got it right on the test boi
Describe the patterns that can be observed for elements on a Periodic table.
Answer:
mark brainliestbrainliestbrainliest.
Explanation:
The periodic table is an arrangement of the elements in order of increasing atomic number. Elements that exhibit similar chemistry appear in vertical columns called groups (numbered 1–18 from left to right); the seven horizontal rows are called periods.
The rate of reaction between two gases increases when the temperature is increased and a catalyst is added. Which statements correctly describe the effect on the reaction?
I. Increasing temperature increases collision frequency
II. Increasing temperature decreases activation energy
III. Adding a catalyst increases the activation energy requirement
IV. Adding a catalyst decreases the activation energy requirement
Group of answer choices
I and III
II and IV
I and IV
II and III
Answer:
The answer is I and III :)
Have an amazing day!!
Please rate and mark brainliest!!
A monosaccharide is formed from a polysaccharide in what kind of reaction?.
Answer:
Catabolic reactions
Explanation:
Anabolic reactions combine monosaccharides to form polysaccharides, fatty acids to form triglycerides, amino acids to form proteins, and nucleotides to form nucleic acids. These processes require energy in the form of ATP molecules generated by catabolic reactions.
Which bonds are formed when elements share electrons and form molecules?.
Answer:
A covalent bond
Explanation:
the atoms bond by sharing electrons. Covalent bonds usually occur between nonmetals. For example, in water (H2O) each hydrogen (H) and oxygen (O) share a pair of electrons to make a molecule of two hydrogen atoms single bonded to a single oxygen atom.
Step 5: place the remaining hydroxy and hydrogen substituents. Review the previous steps to determine the position of the substituents on carbons 1 and 5
Based on the functional groups present in organic compounds, the compound formed from adding hydroxy and hydrogen substituents to carbon atoms is an alcohol.
What are alcohols?Alcohols are organic compounds whose functional group is the hydroxy radical.
The simplest alcohol is methanol whose molecular formula is CH3OH.
The hydroxy group in alcohols are responsible for their properties such as:
solubility- alcohols are soluble in waterhigh boiling points polarityTherefore, the compound formed from adding hydroxy and hydrogen substituents to carbon atoms is an alcohol.
HELP1!!!!!!!!!!!!!!!!!!!!!!!!!!!111
Answer:
I believe c
Explanation:
Sample data from titration lab:
Amount of analyte; (HCI): 19.54 mL
Amount of titrant: (NaOH): 12.33mL
Molar concentration of NaOH: 0.5 mol
The molarity of the HCl would be:
VM
The numbers I used are probably wrong
Based on the volumes of HCl and NaOH reacted, the molarity of HCl is 0.3 M
What a titration?A titration is a process in volumetric analysis in which the given volume of a substance of known concentration reacting with a volume another solution of unknown concentration is used to determine the unknown concentration of another solution
In the titration given, an unknown concentration of HCl reacts with 0.5 M NaOH solution.
The equation of the reaction is given below:
HCl + NaOH -----> NaCl + H2OAt equivalence point, 1 mole of HCl reacts with 1 moles of NaOH
moles of NaOH = 12.33 × 0.5 = 6.165 moles
moles of HCl = 19.54 × M
From above, moles of HCl = 6.165 moles
Molarity of HCl, M = 6.165/19.54
Molarity of HCl = 0.3 M
Therefore, the molarity of HCl is 0.3 M
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Answer:
0.317
Explanation:
right on edge
By titration, 13.5 mL of aqueous H2SO4 neutralized 21.8 mL of 0.0419 M LiOH solution. What was the molarity of the aqueous acid solution?
13.5 mL of 0.0339 M H₂SO₄ is titrated with 21.8 mL of 0.0419 M LiOH.
What is titration?Titration is a process of chemical analysis in which the quantity of some constituent of a sample is determined by adding to the measured sample an exactly known quantity of another substance with which the desired constituent reacts in a definite, known proportion.
Step 1: Write the balanced equation.H₂SO₄ + 2 LiOH ⇒ Li₂SO₄ + 2 H₂O
Step 2: Calculate the reacting moles of LiOH.0.0218 L × 0.0419 mol/L = 0.000913 mol
Step 3: Calculate the reacting moles of H₂SO₄.The molar ratio of H₂SO₄ to LiOH is 2:1.
0.000913 mol LiOH × (1 mol H₂SO₄/2 mol LiOH) = 0.000457 mol H₂SO₄
Step 4: Calculate the molarity of H₂SO₄.[H₂SO₄] = 0.000457 mol/0.0135 L= 0.0339 M
13.5 mL of 0.0339 M H₂SO₄ is titrated with 21.8 mL of 0.0419 M LiOH.
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When a 21.1 mL sample of a 0.321 M aqueous hydrofluoric acid solution is titrated with a 0.309 M aqueous barium hydroxide solution, what is the pH at the midpoint in the titration?
Answer:
formula of concentration ion.
Which step accurately describes how to measure the final burette volume? Locate the bottom of the meniscus and record volume to the nearest 0. 01 mL. Locate the bottom of the meniscus and record volume to the nearest 0. 1 mL. Locate the top of the meniscus and record volume to the nearest 0. 01 mL. Locate the top of the meniscus and record volume to the nearest 0. 1 mL.
Burette is the lab equipment used to estimate the volume of liquid during titration. The volume is measured by the bottom meniscus to the nearest 0.01 mL.
What is a burette?Burette is an instrument used in quantitative analysis like the volume of the sample in the titration methods and is made of a glass tube.
In the volumetric analysis, the final volume of the liquid is measured by locating the lower meniscus and is taken approximately near 0.01 ml as the burettes have markings of 0.1 mL.
Therefore, option a. locate the bottom meniscus and mark nearest to 0.01 mL.
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What three things does force cause?
Forces can cause objects to accelerate , decelerate , stop , start moving , change direction , change shape , or even turn
All of the following are true about scientific theories, except:
O A theory is an explanation of why
something happens.
O Theories must have been extensively
tested.
O A theory can be the result of one
scientific investigation.
O Theories are based on many
observations.
7.
Which substance, if added to a saturated solution of
NH4OH, would cause the pH of the solution to increase?
A. HCI
B. NH4C1
C. LiOH
D. CH3OH
Answer:
C LiOH
Explanation:
because it is an hydroxide as well as it is alkaline
Answer:
C. LiOH
Explanation:
LiOH is a strong base while the others are acids
How does the ice cube feel in your hand at first? Explain in terms of heat transfer.
In your own words.
Answer:
the ice cube feels cold
Explanation:
heat transfer is like how the sun gives us and the radiation of it put heat transfer but we dont have radiation
Which sphere is the troposphere a part of?
Select one:
the geosphere
the biosphere
the hydrosphere
the atmosphere
Answer:
The atmosphere is your answer
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The chemical equation below shows the formation of aluminum oxide (al2o3) from aluminum (al) and oxygen (o2). 4al 3o2 right arrow. 2al2o3 the molar mass of o2 is 32.0 g/mol. what mass, in grams, of o2 must react to form 3.80 mol of al2o3? 60.8 grams 81.1 grams 122 grams 182 grams
The mass of oxygen must react to form 3.80 mol of Al₂O₃ in the given reaction is 182 grams.
How do we calculate mass from moles?Mass of any substance will be calculated by using their moles as:
n = W/M, where
W = required mass
M = molar mass
Given chemical reaction is:
4Al + 3O₂ → 2Al₂O₃
From the stoichiometry of the reaction it is clear that,
2 moles of Al₂O₃ = obtained from 3 moles of O₂
3.80 moles of Al₂O₃ = obtained from 3/2×3.80=5.7 moles of O₂
Now we calculate the mass of oxygen of 5.7 moles as:
W = (5.7mol)(32g/mol) = 182.4 grams or 182g
Hence option (4) is correct.
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Answer: 182 grams
Explanation: