As the scuba diver ascends rapidly to the surface at the given pressure, the volume of the nitrogen bubble at the surface becomes 0.021mL.
Boyle's lawBoyle's law states that the volume V of a given quantity of gas is inversely proportional to its pressure P as long as temperature remains constant.
Boyle's law is expressed as;
P₁V₁ = P₂V₂
Where P₁ is Initial Pressure, V₁ is Initial volume, P₂ is Final Pressure and V₂ is Final volume.
Given the data in the question;
Initial volume; V₁ = 0.005mL = 5.0 × 10⁻⁶LInitial pressure; P₁ = 4.1atmFinal pressure; P₂ = 1.0atm Final volume; V₂ = ?We substitute our given values into the expression above to find the final volume.
P₁V₁ = P₂V₂
[tex]V_2 = \frac{P_1V_1}{P_2} \\\\V_2 = \frac{4.1atm \ *\ 5.0*10^{-6}L}{1.0atm}\\ \\V_2 = \frac{4.1 \ *\ 5.0*10^{-6}L}{1.0}\\\\V_2 = 2.05*10^{-6}L\\\\V_2 = 0.021mL[/tex]
Therefore, as the scuba diver ascends rapidly to the surface at the given pressure, the volume of the nitrogen bubble at the surface becomes 0.021mL.
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C + 2H2
CH4
For the reaction shown here, predict how many moles of methane can be produced from 72 grams of carbon in the presence of excess hydrogen gas.
A) 1
B) 2
C) 4
D) 6
Answer:
D
Explanation:
12g of carbon produces....... 1 mole of methane
72g of carbon will produce..1÷12 × 72 = 6moles
How many atoms of N are in 137. 0 grams of N2O3? A. 1. 085 × 1023 B. 1. 802 × 1023 C. 5. 985 × 1023 D. 2. 171 × 1024 E. 3. 604 × 1024.
The number of atoms of nitrogen present in 137 grams of N₂O₃ in 2.1 × 10²⁴.
What is Avogadro's number?Avogadro's number is that number which tells about the number of atoms or entities of any substance present in one mole of any substance, i.e. 1 mole = 6.022 × 10²³
First we have to convert mass of N₂O₃ to moles by using the below formula:
n = W/M, where
W = given mass = 137g
M = molar mass = 76g/mol
Moles of N₂O₃ = 137 / 76 = 1.8mol
From the stoichiometry of the mass and formula it is clear that:
In 76g of N₂O₃ = 2 moles of Nitrogens are present
In 137g of N₂O₃ = 2/76×137=3.6 moles of Nitrogens are present
No. of N atoms in 3.6 moles = 3.6 × 6.022 × 10²³ = 2.1 × 10²⁴
Hence option (D) is correct.
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During this chemical reaction energy is absorbed. In the chemistry lab, this would be indicated by a decrease in temperature or if
the reaction took place in a test tube, the test tube would feel colder to the touch. Reactions like this one absorb energy because
A) the reaction requires activation energy.
B) the reactants have less potential energy than the products.
C)the reactants have more potential energy than the products.
D)the mass of the products is greater than the mass of the reactants.
Reactions like this one absorb energy because the reactants have less potential energy than the products.
What is an Endothermic reaction?This is the type of reaction in which the reactants absorb heat energy from the surroundings to form products.
This brings about a decrease in the temperature as a result of the reactants having less potential energy than the products thereby making option B the most appropriate choice.
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Methane from ohio's rose valley coal mine has successfully been used to power fuel cells. since the fuel used in these cells is not burned, using methane from this mine will help to
a.increase public awareness of global warming issues
b.increase the concentration of atmospheric ozone
c.reduce public demand for alternative fuel souces
d.reduce pollutants commonly associated with fossil fuel combustion
Methane in fuel cells are not burned and therefore, help to reduce pollutants commonly associated with fossil fuel combustion.
What are fossil fuels?Fossils fuels are fuels wgich are produced from fossils which have decomposed under intense heat and pressure over a long period of time.
Fossils fuels include:
methanepetrolkerosenediesel oilcoalFossils fuels combustion release pollutants into the atmosphere and have greatly contributed to global warming.
Since methane in fuel cells are not burned, it will help to reduce pollutants commonly associated with fossil fuel combustion.
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HELPSPEPEP ILL BRAINLIST!!!
Explain the scale of recycling that is currently present in Australia and predict how traditional industries could be affected by an increase in recycling in Australia.
make it short and simple pls. ty.
Answer:
Negative impacts include: noise, air and odour pollution from collection and reprocessing facilities; costs to set up recycling infrastructure and education materials for new areas; and costs associated with innovations and technologies, which are likely to be passed on to end consumers in product prices.
Explanation:
What does a pH of 13.8 mean
Question 8 options:
The solution is acidic
Impossible to tell from the information provided.
The solution is a strong base
The solution is basic
A solution with a pH of 13.8 means that the solution is a strong base.
What is pH?pH refers to power of hydrogen. The pH is a scale used to measure the degree of acidity or alkalinity of a solution.
pH scale ranges from 0 - 14
Where;
0 -6.9 indicates acidic7.1 - 14 indicates basicHowever, the closer the pH value is to 1, the more the acidity and vice versa while the closer it is to 14, the more the alkalinity and vice versa.
Therefore, a solution with a pH of 13.8 means that the solution is a strong base.
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what is The relationship between a carnivore and an herbivore can be stated as
A
parasite and host
B
predator and prey
C
prey and predator
D
scavenger and parasite
What is the hydroxide ion concentration of an aqueous solution with a ph of 3. 45
the solution is an alkali
The hydroxide ion concentration of an aqueous solution with a ph of 3. 45 is 10⁻³·⁴⁵
What is pH?PH is potential hydrogen. It helps in to determine the acidity and basicity of any solution.
To get the hydroxide ion concentration of an aqueous solution, the following formula will be used.
[tex]pH = -log^[^H^+^]\\pH=-log^[^H^3^O^+^]\\\\-log [^H^3^O^+^] - pH\\ 10 ^-pH = [H3O^+] \\\\H3O^+ = 10^-^3^.^4^5[/tex]
Thus, the hydroxide ion concentration is 10⁻³·⁴⁵
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It's sunny in New York, but it is cool. Where would you expect to find this lizard during the day? Question 16 options: Under a rock In a damp stream bed Basking in a sunny spot In a hole in the ground.
It's sunny in new york, but it is cool, we will expect to find lizard under a rock or in a hole in the ground, where temperature is more than outside.
Why lizards are not comfortable in cold?Lizards are not easily survive in the winter season as they are cold blooded animal, so their body will not active in the winter season.
During the winter season or in the cold weather, lizards will go to the places where they feel less cooling. And these places be like inside the rocks, under a hole, under the ground, in the trunks of trees, etc. due to high temperature.
Hence, options (1) and (4) are correct.
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The chemical equation below shows the photosynthesis reaction. 6co2 6h2o right arrow. c6h12o6 6o2 the molar mass of carbon dioxide (co2) is 44.01 g/mol. the molar mass of water (h2o) is 18.02 g/mol. a reaction uses 528 g of co2. how many moles of water are used in this reaction? 12.0 moles 72.0 moles 216 moles 528 moles
The moles of water are used in the given reaction between CO₂ & H₂O is 12 moles.
How do we calculate mass from moles?Mass of any substance will be calculated by using their moles as:
n = W/M , where
W = given or required mass
M = molar mass
Given chemical reaction is:
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
Moles of 528 g of CO₂ = 528g / 44.01g/mol = 11.99 moles
From the stoichiometry of the reaction, it is clear that:
6 moles of CO₂ = reacts with 6 moles of H₂O
So, 11.99 moles of CO₂ = reacts with 11.99 = 12 moles of H₂O
Hence option (a)is correct i.e. 12 moles.
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Answer:
A
Explanation:
What units are appropriate to express specific heat?.
Answer:
joules per gram per degree (J/goC) or calories per gram per degree (cal/goC).
Explanation:
Answer:
Joules, Kelvin, or calories
Explanation:
Which of these has an oxidation number of zero (0)? Cal2, Ca CaS, Ca3N2
Ca is the correct answer. Maybe
When hydrogen is used in a fuel cell, the only waste product is/are __________
Answer:
water
Explanation:
The only by-products from combining hydrogen and oxygen in a fuel cell are water and heat, so hydrogen fuel cells do not emit greenhouse gases or other air pollutants as engines that use fossil fuels do.
If an element has no electrons to share and is stable, what family is it
found in?
A alkali metals
B. noble gases
c. halogens
Why do we balance chemichal reactions
Answer:
We balance chemical equations due to the law of conservation of mass, which states that mass can neither be created or destroyed. Therefore, in a chemical reaction, the total mass of the reactants must be equal to the total mass of the products. Balancing equations accounts for the total mass of the reactants and the total mass of the products.
Explanation:
We balance chemical equations due to the law of conservation of mass, which states that mass can neither be created or destroyed. Therefore, in a chemical reaction, the total mass of the reactants must be equal to the total mass of the products. Balancing equations accounts for the total mass of the reactants and the total mass of the products.
Answer:
to satisfy the law of conservation of matter.
the law of conservation states that matter can not be created nor destroyed.
1. What is the percent increase in carbon dioxide in the atmosphere between 2015 and 2020? Between 1960 and 2020? SHOW YOUR WORK!!!!
Answer:An accompanying WMO report on greenhouse gas concentrations shows that 2015-2019 has seen a continued increase in carbon dioxide (CO2) levels and other key greenhouse gases in the atmosphere to new records, with CO2 growth rates nearly 20% higher than the previous five years.
Explanation:That's because the annual growth rate of atmospheric carbon dioxide has roughly tripled, from 0.6 ppm per year in the early 1960s to an average 2.1 ppm during the past 10 years. At Mauna Loa, carbon dioxide concentrations in 2015 jumped by 3.05 ppm
balance the equation
___NaBr + ___ Ca(OH)2 -----> ___CaBr2 + ___NaOH
Answer:
2NaBr + Ca(OH)2 ––> CaBr2 + 2NaOH
An aqueous solution turns litmus red. The ph of this solution could be
If an aqueous solution turns litmus red, the pH of the solution could be the range of 1 - 6.
What is an acid?An acid is a substance that is capable of producing only hydrogen ions (H+) when dissolved in water.
An acid posseses other unique characteristics and are as follows:
Acids are corrosive in their concentrated formAcids turn blue litmus redAcids are sour to tasteThe pH range of an acidic substance is between 1-6.
Therefore, if an aqueous solution turns litmus red, the pH of the solution could be the range of 1 - 6.
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The molar mass of sucrose (C12H22O11) is 342. 3 g/mol. A chemist has a 0. 500-mol sample of sucrose. What is the mass, in grams, of this sample? 171 grams 342 grams 500 grams 684 grams.
Mass is the weight of the compound or the molecule in a sample that is given in grams. The mass of sucrose in the sample is 171 gms.
What is mass?The mass of the compound is the product of the molar mass of the compound and the number of moles of the compound in a sample.
Given,
The molar mass (m.w.t) of sucrose = 342.3 g/mol
Number of moles (n) of sucrose = 0.500 moles
The mass of sucrose is calculated as:
[tex]\begin{aligned} \rm mass &= \rm molar\; mass \times moles \\\\&= 342.3 \times 0.500\\\\&= 171.15 \;\rm gm\end{aligned}[/tex]
Therefore. the mass of sucrose in the sample is option A. 171 gms.
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Select the correct answer below that correctly describes what a Arrhenius Acid Base reaction is.
Question 1 options:
An acid base reaction where one compound increases the amount of H+ or OH- in solution.
An acid base reaction where one compound is donating an H+ and one atom is accepting an H+
An acid base reaction where one compound is donating electrons and another compound is accepting electrons.
An acid base reaction where one compound is donating an OH- and one atom is accepting an OH-.
From the options, the statement ththat describes an acid - base reaction in the Arrhenius sense is; "an acid base reaction where one compound is donating an H+ and one atom is accepting an H+."
What is the Arrhenius definition?The Arrhenius definition of a base is that a base is a substance that releases hydroxide ions as its only negative ions in solution. An acid is a substance that produces hydrogen ions as its only positive ions in solution.
If we look at the definitions shown here, the only one that accurately depicts acid - base reaction in the Arrhenius sense is "an acid base reaction where one compound is donating an H+ and one atom is accepting an H+."
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Under which set of conditions do real gases deviate the most from the ideal gas law?
Answer:
In summary, a real gas deviates most from an ideal gas at low temperatures and high pressures. Gases are most ideal at high temperature and low pressure. What factors attributes to the deviation of gas law from the ideal gas theory?
Explanation:
Real gases deviate the most from the ideal gas law under low temperature and high pressure.
What is the ideal gas law?
Ideal gas laws say about hypothetical gases, the collision between the molecules of an ideal gas would be perfectly elastic.
There are three variables of an ideal gas, absolute temperature, pressure, and volume.
PV = nRT
Thus, real gases deviate the most from the ideal gas law under low temperature and high pressure.
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What is the effect Coriolis effect
The Coriolis effect is a natural phenomenon in which objects appear to be deflected as they travel around and above the Earth. The Earth is always rotating, or spinning, from west to east. It completes a full rotation every 24 hours. The Coriolis effect is caused by this rotation.
Please calculate the mass percent of water in the formula: NiSO4.3 H2O
Please help me raise my grade up and I’ll give you brainliest!
Answer:
208.8018 g/Mol you conver the answer by weight and moles
How does the buffer maintain the ph of the solution when an acid is added to it?.
Answer: By reacting with the hydrogen ions.
Explanation:
A 56kg skydiver jumps from the helicopter at
1524m from the ground. What is the jumper's potential energy?
The jumper's potential energy at a height of 1524 meters above the ground is equal to 836,371.2Joules.
Given the following data:
Mass of ball = 56 kilograms.Height = 1524 meters.Acceleration due to gravity = 9.8 [tex]m/s^2[/tex]How to calculate potential energy.Mathematically, potential energy is given by this formula:
[tex]P.E = mgh[/tex]
Where:
m is the mass.h is the height.g is acceleration due to gravity.Substituting the given parameters into the formula, we have;
[tex]P.E = 56 \times 9.8 \times 1524[/tex]
P.E = 836,371.2Joules.
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what may cause some short term environmental changes how would organisms respond to these changes
Answer:
Refer to explanation
Explanation:
Weather is the main cause behind most short term environmental changes
For example, a period of heavy rain may lead to a pond overflowing, and flooding the nearby shrubbery
Animals in the area would adapt to this by trying to keep away from the flooded area until it dries out, once the rain ends
Which of the following radioactive emissions is the least penetrating?
alpha particles
gamma rays
beta particles
Answer:
alpha particles
Explanation:
alpha particles the least penetrating but potentially most damaging and gamma rays the most penetrating. A beta particle, also called beta ray or beta radiation, is a high-energy, high-speed electron or positron emitted by the radioactive decay of an atomic nucleus during the process of beta decay.
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A 112g sample of co(g) is combined with a 32g sample of o2(g) and the reaction represented proceeds as completely as possible.which two of the following statements are correct? *
a. co(g) is the limiting reactant.
b. o2(g) is the limiting reactant.
c. 4mol of co(g) reacts.
d. 2mol of co(g) remains unreacted.
e. 144g of co2(g) is produced.
Based in the equation of the reaction, oxygen gas, O2 is the limiting reactant and 2 moles of CO remain unreacted
What is the equation of reaction between CO and O2?The reaction of carbon(ii) oxide, CO and oxygen, O2 is a redox reaction which produces carbon (iv) oxide, CO2.
The equation of the reaction. is given below:
2 CO + O2 ----> 2 CO2From the equation of the reaction, 2 moles of CO are required to react with 1 mole of O2 to produce 2 moles of CO2
The moles of the reacting substances is calculated using the formula:
moles = mass/molar massMolar mass of CO = 28 g
Moles of CO = 112/28 = 4 moles
Molar mass of 02 = 32 g
Moles of O2 = 32/32 = 1 mole
Therefore, oxygen gas, O2 is the limiting reactant and 2 moles of CO remain unreacted.
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1. Given the following equation:
_____ K2PtCl4 + _____ NH3 --------> _____ Pt(NH3)2Cl2 + _____ KCl
a) Balance the equation.
b) Determine the theoretical yield of KCl if you start with 34.5 grams of NH3.
c) Starting with 34.5 g of NH3, and you isolate 76.4 g of Pt(NH3)2Cl2, what is the percent yield?
2. Given the following equation:
H3PO4 + 3 KOH ------> K3PO4 + 3 H2O
a) If 49.0 g of H3PO4 is reacted with excess KOH, determine the percent yield of K3PO4 if you isolate 49.0 g of K3PO4.
3. Given the following equation:
Al2(SO3)3 + 6 NaOH ------> 3 Na2SO3 + 2 Al(OH)3
a) If you start with 389.4 g of Al2(SO3)3 and you isolate 212.4 g of Na2SO3, what is your percent yield for this reaction?
4. Given the following equation:
Al(OH)3(s) + 3 HCl(aq) -------> AlCl3(aq) + 3 H2O(l)
a) If you start with 50.3 g of Al(OH)3 and you isolate 39.5 g of AlCl3, what is the percent yield?
5. Given the following equation:
K2CO3 + HCl --------> H2O + CO2 + KCl
a) Balance the equation.
b) Determine the theoretical yield of KCl if you start with 34.5 g of K2CO3.
c) Starting with 34.5 g of K2CO3, and you isolate 3.4 g of H2O, what is the percent yield?
The percent yield obtained from the stoichiometry of the reaction when the moles of the reactants and products are known.
What is stoichiometry?Stochiometry gives the relationship between the mass and mole or moles and volume in a reaction.
Q1)
K2PtCl4 + 2NH3 ----> Pt(NH3)2Cl2 +2KCl
Number of moles of NH3 = 34.5 g/17 g/mol = 2.03 moles
2 moles of NH3 yields 2 moles of KCl
2.03 moles of NH3 yields 2.03 moles of KCl
Theoretical yield of KCl = 2.03 moles * 75 g/mol = 154 g
Again,
2moles of NH3 yields 1 mole of Pt(NH3)2Cl2
2.03 moles of NH3 yields 2.03 moles * 1/2 = 1.015 moles
Mass of Pt(NH3)2Cl2 = 1.015 moles * 301 g/mol = 306 g
% yield = 76.4 g/306 g * 100/1 = 25%
Q2)
H3PO4 + 3 KOH ------> K3PO4 + 3 H2O
Number of moles of H3PO4 = 49.0 g/98 g/mol = 0.5 moles
If mole of H3PO4 yield 1 mole of K3PO4
0.5 moles of H3PO4 yield 0.5 moles of K3PO4
Mass of K3PO4 = 212 g/mol * 0.5 moles = 106 g
Percent yield = 49.0 g/106 g * 100 = 46%
Q3)
Al2(SO3)3 + 6 NaOH ------> 3 Na2SO3 + 2 Al(OH)3
Number of moles of Al2(SO3)3 = 389.4 g/294 g/mol = 1.32 moles
If 1 mole of Al2(SO3)3 yields 3 moles of Na2SO3
1.32 moles of Al2(SO3)3 yields 1.32 moles * 3 moles/1 mole = 3.96 moles
Mass of Na2SO3 = 3.96 moles * 126 g/mol = 498.96 g
Percent yield = 212.4 g/498.96 g * 100/1 = 43%
Q4)
Al(OH)3(s) + 3 HCl(aq) -------> AlCl3(aq) + 3 H2O(l)
Number of moles of Al(OH)3 = 50.3 g/78 g/mol = 0.64 moles
If 1 mole of Al(OH)3 yields 1 mole of AlCl3
0.64 moles of Al(OH)3 yields 0.64 moles of AlCl3
Mass of AlCl3 = 133 g/mol * 0.64 moles = 85 g
Percent yield = 39.5 g/85 g * 100 = 46%
Q5) K2CO3 + 2HCl --------> H2O + CO2 + 2KCl
Number of moles of K2CO3 = 34.5 g/138 g/mol = 0.25 moles
1 mole of K2CO3 produces 2 moles of KCl
0.25 moles of K2CO3 produces 0.25 moles * 2 moles/1 mole = 0.5 moles
Mass of KCl = 0.5 moles * 75 g/mol = 37.5 g
If 1 mole of K2CO3 yields 1 mole of H2O
0.25 moles of K2CO3 yields 0.25 moles of H2O
Mass of H2O = 0.25 moles * 18 g/mol = 4.5 g
Percent yield = 3.4 g/4.5 g *100 = 76%
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what mass of sulfurous acid is produced when 245g of sulfur dioxide is reacted with water?
H₂O + SO₃ = H₂SO₃
The mass of sulfurous acid produced when 245g of sulfur dioxide is reacted with water is 313.8 g
StoichiometryFrom the question, we are to determine the mass of sulfurous acid produced
First, we will write the balaced chemical equation for the reaction
H₂O + SO₂ → H₂SO₃
This means 1 mole of H₂O reacts with 1 mole of sulfur dioxide (SO₂) to produce 1 mole of sulfurous acid (H₂SO₃)
Now, we will determine the number of moles of sulfur dioxide present
Mass of sulfur dioxide present = 245 g
Molar mass of sulfur dioxide = 64.066 g/mol
Using the formula,
[tex]Number \ of \ moles = \frac{Mass}{Molar\ mass}[/tex]
Then,
Number of moles of SO₂ present = [tex]\frac{245}{64.066}[/tex]
Number of moles of SO₂ present = 3.824 moles
This is the number of moles of SO₂ present
From balanced chemical equation
1 mole of H₂O reacts with 1 mole of sulfur dioxide (SO₂) to produce 1 mole of sulfurous acid (H₂SO₃)
Then,
Water (H₂O) will react with the 3.824 moles of sulfur dioxide (SO₂) to produce 3.824 moles of sulfurous acid (H₂SO₃)
∴ The number of moles of sulfurous acid produced is 3.824 moles
Now, for the mass of sulfurous acid produced
Molar mass of sulfurous acid = 82.07 g/mole
Using the formula,
Mass = Number of moles × Molar mass
Mass of sulfurous acid produced = 3.824 × 82.07
Mass of sulfurous acid produced = 313.8 g
Hence, the mass of sulfurous acid produced is 313.8 g
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