Which sample of ocean water would be the most likely to have the highest salinity?
Ocean water taken from the surface of the ocean
The warmest sample of ocean water
The ocean water taken from an area near the polar ice caps
Ocean water taken from the bottom of the ocean
Answers
Answer:
Ocean water taken from the surface of the ocean
Explanation:
Attached is a plot of ocean salinity vs. depth. It shows the highest salinity ocean water is surface water. A world-wide map of ocean salinity shows the highest salinity to be in mid-latitude regions in the middle of the ocean. Water near the North Pole has lower salinity than that for lower latitudes.
Probably the main reason for higher salinity at the surface is the high evaporation rate of water there, leaving behind the salt.
Related Questions
What is the total number of moles of atoms contained in 1 mole of NH3? 1 mole, 2 moles, 3 moles, or 4 moles
Answers
Answer:
4 moles
Explanation:
N is 1 atom and H has a subscript of 3 meaning there are 3 hydrogen atoms. (3+1=4). We know that N is a separate element of H, because they are both uppercase.
Moles are defined as the smallest base unit that is equivalent to [tex]6 .02214 \times 10^{23}[/tex] units.
In the given molecule of NH[tex]_4[/tex], there will be 4 moles of each atom.
NH[tex]_4[/tex] consists of 1 mole of the Nitrogen atom and 3 moles of the Hydrogen atom, which is then equivalent to the 4 moles of each atom in the molecule of NH[tex]_4[/tex].
Moles are chemical entities, which are used to measure the mass or molecular mass of the compound, molecule, or atom. The moles are, for example can be explained as equal to the mass of the atom. For example, there is one mole in 12 grams of carbon.
Thus, the correct answer is Option D.
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How many grams of potassium iodide will produce 500 grams of silver iodide, when there is an excess of silver nitrate?Why?
A.235
B.707g
C.166g
D.301g
Answers
Answer:
None of the options are correct. The answer to the question is 353.2g
Explanation:
The equation for the reaction between is given below:
KI + AgNO3 —> KNO3 + AgI
Molar Mass of KI = 39 + 127 = 166g/mol
Molar Mass of AgI = 108 + 127 = 235g/mol
From the equation,
166g of KI produced 235g of AgI.
Therefore, Xg of KI will produce 500g of AgI i.e
Xg of KI = (166 x 500)/235 = 353.2g
A fountain pen, which has a total volume of 2.4 cm is half full with ink at ground level where the pressure is
780.0 mm Hg. It is put into the pocket of a pilot who flies to an altitude where the pressure is 520.0 mm Hg.
How much ink leaks out of the pen?
Answers
The amount of ink leaking out of the pen when the pressure decreases from 780 mm Hg to 520 mm Hg is 0.6 cm3, calculated using Boyle's Law.
Explanation:The question involves principles of physics, particularly the behavior of gases under changes in pressure, represented by Boyle's Law, which states that the volume of a gas is inversely proportional to its pressure. This means that when the pressure decreases, the volume of a gas (or ink in this case) increases. The fountain pen was filled at a pressure of 780.0 mm Hg, and the new pressure at the pilot's altitude is 520.0 mm Hg. We can use Boyle's Law to calculate the new volume of ink.
Here's how:
First, start with Boyle's Law equation: P1V1 = P2V2, where P1 is the initial pressure, V1 is the initial volume, P2 is the final pressure, and V2 is the final volume.Next, input your known values: (780 mm Hg)(1.2 cm3) = (520 mm Hg)(V2)Solve for V2, which comes out to be about 1.8 cm3.Since the pen can only hold 2.4 cm3, the excess volume of ink that is 1.8 cm3 - 2.4 cm3 = -0.6 cm3 will leak out. Note that the negative sign just implies leakage or reduction in volume.
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2. Define and describe a mixture using examples.
Answers
A mixture is a substance made by combining two or more different materials in such a way that no chemical reaction occurs.
A mixture can usually be separated back into its original components. Some examples of mixtures are a tossed salad, salt water and a mixed bag of M&M's candy.
The temperature at which a solid melts is not characteristic if a compound nor an element
Answers
Answer:
False
Explanation:
The temperature at which a solid melts, known as its melting point is highly characteristic of a compound and element.
The melting point of pure substances, compounds and elements is definite and not varied.
Melting point is an intensive property of matter. It does not depend on the amount of matter present. It is an innate or intrinsic property of every matter. For example, no matter the volume or mass of water, it will always boil at 100°C, all things being equal.Therefore, melting point of most solids is characteristic of compounds and elements.
Which of the following statements is correct in regards to density?
Temperature is directly proportional to density.
Temperature and pressure do not affect density.
Pressure is directly proportional to density.
Pressure is inversely proportional to density.
Answers
Answer:
Pressure is directly proportional to the density of a substance.
Explanation:
Pressure is a measure of force per unit area. Density is defined as mass per unit volume i.e the ratio of mass of a substance to it's volume.
Thus, it means that an increase in pressure results in an increase in density and vice-versa.
The melting point and freezing point of silver are 960 degrees celsius and 2162 degrees celsius, repectively. What is the freezing point?
Answers
Answer: 960 degrees celsius
Explanation:
The freezing point of silver is 960 degrees Celsius.
The melting point and freezing point of a pure substance are the same temperature, just described from different states of matter. When a substance transitions from solid to liquid, it is melting, and the temperature at which this occurs is called the melting point. Conversely, when a substance transitions from liquid to solid, it is freezing, and the temperature at which this occurs is called the freezing point. For silver, the temperature at which it melts (melting point) is 960 degrees Celsius, and this is also the temperature at which it freezes (freezing point). The value given for the freezing point in the question, 2162 degrees Celsius, is incorrect and is likely a typographical error. The correct freezing point of silver is 960 degrees Celsius.
6.0 moles of Na and 4.0 moles of Cl2 are mixed, how manu moles of NaCl in moles cane be made from this mixture
2 Na(s) + Cl2(g) —> 2 NaCl(s)
Answers
Answer:
Moles of NaCl formed is 6.0 moles
Explanation:
We are given the equation;
2 Na(s) + Cl₂(g) → 2 NaCl(s)
Moles of Na is 6.0 moles Moles of Cl₂ is 4.0 molesFrom the reaction;
2 moles of sodium reacts with 1 mole of chlorine gas to form 2 moles of NaCl
In this case;
6 moles of Na would require 3 moles of Cl₂, this means that chlorine gas is in excess.
Thus, the rate limiting reagent is sodium.
But, 2 moles of sodium reacts to form 2 moles of NaCl
Therefore;
Moles of NaCl = Moles of Na
= 6.0 moles
Thus, moles of sodium chloride produced is 6.0 moles
3. Use your knowledge of collision theory to explain the results of your experiments in this laboratory. PLEASE HELP ME.
Answers
Answer: I don’t have much of a clue as to what you did; I wasn’t there . In gas theories however, the heated gas into a balloon will expand, and gases when under pressure can liquify. It is easy to see which molecules were popped around the most! Read that chapter and work all of the problems.
Explanation:
Please help me with this: Create 20 bullet points specifically about energy exchanges in Earth's systems. Also, it doesn't have to be in 20 bullet points as long as it is about energy exchanges in Earth's systems in full paragraph that is fine too.
Answers
The below is about the energy exchanges in earth systems.
Explanation:
Energy exchanges in earth systems are of many types. The earth systems are atmosphere, geosphere, stratosphere, hydrosphere, and biosphere. All these earth systems exchange energy with each other.The earth gains energy reflected from the sky. It converts that energy back to space. That energy is equally given to all the planets in the sky.Each planet will absorb that energy and radiate heat. This heat is absorbed by all the places on the earth. So this is the energy exchange in the earth systems.Energy exchanges in Earth's system revolves around Earth's main energy outputs which are visible and infrared radiation, reflected light and thermal infrared radiation. ultraviolet radiation and visible radiation, gamma rays, X-rays and ultraviolet radiation.
Explanation:
Energy exchanges in Earth's system revolves around Earth's main energy outputs which are visible and infrared radiation, reflected light and thermal infrared radiation. ultraviolet radiation and visible radiation, gamma rays, X-rays and ultraviolet radiation.The Sun, which makes the external processes that occur in the atmosphere, hydrosphere, and at Earth's surface, The heat flowing from Earth's interior give power to the internal processes that produce volcanoes, earthquakes, and mountains.The Sun also radiates huge amounts of energy. Only a small portion of that energy hits the Earth, but it is enough to light our days, heat our air and land and it creates weather systems over the oceans and seas.When the Sun's energy moves around the space, it reaches Earth's atmosphere and finally to the surface.This heat energy is transferred throughout the planet's systems in three ways which are by radiation,by conduction, and by convection.The rate constant of the first-order reaction A→3B is 0.291 s−1. The concentration of A at t=5 seconds is 0.081 mol/L. What was the initial concentration of A?
Answers
To find the initial concentration of A in a first-order reaction, we can use the integrated rate law.
Explanation:In a first-order reaction, the rate of the reaction is directly proportional to the concentration of the reactant. The rate constant for the given first-order reaction is 0.291 s-1. To find the initial concentration of A, we can use the integrated rate law for first-order reactions:
[A]t = [A]0 * e-kt
Where [A]t is the concentration of A at time t, [A]0 is the initial concentration of A, k is the rate constant, and e is the base of natural logarithms. Putting in the given values, we get:
0.081 mol/L = [A]0 * e-(0.291 s-1)(5 s)
Solving for [A]0, we find that the initial concentration of A is approximately 0.232 mol/L.
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A 475mL sample of gas was collected at a temperature of -21.5 and a pressure of 756mmHg. Calculate the volume of a gas(in liters) if the conditions were altered to STP
Answers
The volume of gas under STP is 0.512 liters.
Explanation:
At STP (Standaed Temperature and Pressure)
T = 0°C
P = 1 atm = 760 mmHg
Given
P1 = 756 mmHg
T1 = -21.5°C = -21.5 + 273 = 251.5 K
V1 = 475 mL = 0.475 L
P2 = 760 mmHg
T1 = 0°C = 0 + 273 = 273 K
We know that
[tex]\frac{P1 \times V1}{T1} = \frac{P2 \times V2 }{T2}\\\\\frac{756 \times 0.475}{251.5} = \frac{760 \times V2}{273}\\[/tex]
[tex]V2 = \frac{273 \times 756 \times 0.475}{251.5 \times 760} \\V2 = \frac{98034.3}{191140}[/tex]
V2 = 0.512 L
What does nitrogen do to the soil
Answers
Answer:The chemical element will always get converted during the cycle as it enters different ecosystems. Nitrogen plays an important role as a nutrient in soils. It is needed for photosynthesis in plants. Nitrogen helps decomposers such as bacteria, worms
Explanation:
Answer Nitrogen is so vital because it is a major component of chlorophyll, the compound by which plants use sunlight energy to produce sugars from water and carbon dioxide (i.e., photosynthesis). It is also a major component of amino acids, the building blocks of proteins. Without proteins, plants wither and die.
Explanation:
Item 4
How do conditions change as the depth of the ocean water increases?
Temperature increases and pressure decreases.
Temperature increases and pressure increases.
Temperature decreases and pressure increases.
Temperature decreases and pressure decreases.
Answers
Answer:
c
Explanation:
Answer:
option 2
Explanation:
temperature decreases as you are further away from the sun and less thermak energy is reaching you. the pressure increases as more water is above you.
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What is the relationship between molecules and atoms?
Molecules are combinations of two or more atoms.
Molecules are the parts that make up atoms.
Molecules are the gaseous form of atoms.
Molecules are atoms that have a positive charge.
Answers
Molecules are combinations of two or more atoms.
The relationship between molecules and atoms is molecules are combination of two or more atoms (1st option)
How to determine the relation between atoms and molecules?
To obtain the relationship between atoms and molecules, we must know the definition of atom and molecule. This is given below:
Atoms are smallest particles of an element that can partake in a chemical reaction.
Molecules are combination of two or more atoms that can exist free in natural state
From the above definition, we can see that molecules contains atoms.
Thus, we can conclude that from the above definition that the correct answer to the question is molecules contains two or more atoms (1st option)
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Pure water can be consumed in a chemical reaction, resulting in the formation of a new
product. Refer to paragraph four. What type of change is this?
A. A physical change
B. A chemical change
C. A mixture change
D. A compound change
Answers
Answer: A chemical reaction is a process that leads to the chemical transformation of one set of chemical substances to another.[1] Classically, chemical reactions encompass changes that only involve the positions of electrons in the forming and breaking of chemical bonds between atoms, with no change to the nuclei (no change to the elements present), and can often be described by a chemical equation. Nuclear chemistry is a sub-discipline of chemistry that involves the chemical reactions of unstable and radioactive elements where both electronic and nuclear changes can occur.
The substance (or substances) initially involved in a chemical reaction are called reactants or reagents. Chemical reactions are usually characterized by a chemical change, and they yield one or more products, which usually have properties different from the reactants. Reactions often consist of a sequence of individual sub-steps, the so-called elementary reactions, and the information on the precise course of action is part of the reaction mechanism. Chemical reactions are described with chemical equations, which symbolically present the starting materials, end products, and sometimes intermediate products and reaction conditions.
Chemical reactions happen at a characteristic reaction rate at a given temperature and chemical concentration. Typically, reaction rates increase with increasing temperature because there is more thermal energy available to reach the activation energy necessary for breaking bonds between atoms.
Reactions may proceed in the forward or reverse direction until they go to completion or reach equilibrium. Reactions that proceed in the forward direction to approach equilibrium are often described as spontaneous, requiring no input of free energy to go forward. Non-spontaneous reactions require input of free energy to go forward (examples include charging a battery by applying an external electrical power source, or photosynthesis driven by absorption of electromagnetic radiation in the form of sunlight).
Different chemical reactions are used in combinations during chemical synthesis in order to obtain a desired product. In biochemistry, a consecutive series of chemical reactions (where the product of one reaction is the reactant of the next reaction) form metabolic pathways. These reactions are often catalyzed by protein enzymes. Enzymes increase the rates of biochemical reactions, so that metabolic syntheses and decompositions impossible under ordinary conditions can occur at the temperatures and concentrations present within a cell.
The general concept of a chemical reaction has been extended to reactions between entities smaller than atoms, including nuclear reactions, radioactive decays, and reactions between elementary particles, as described by quantum field theory.
When pure water is consumed in a chemical reaction, it undergoes a chemical change and forms new substances.
Explanation:The type of change that occurs when pure water is consumed in a chemical reaction, resulting in the formation of a new product, is B. A chemical change.
In a chemical change, the substances involved undergo a chemical reaction and form new substances with different properties. In this case, when water is consumed, it is chemically broken down and transformed into other compounds and molecules that are used by our bodies.
An example of a chemical change involving water is the process of digestion. When we consume food, it goes through various chemical reactions in our body, breaking down into smaller molecules that our cells can utilize.
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What volume of 0.05 mol/L HCl is required to react with 5.00g of manganese dioxide according to this equation?
4HCl(aq) + MnO2(s) → 2H2O(l) + MnCl2(aq) + Cl2(g)
Answers
217 ml of 0.05 M HCl will be required to react with 5 gm of MnO2 according to the equation given.
Explanation:
The balanced chemical equation is given as:
4HCl(aq) + MnO2(s) → 2H2O(l) + MnCl2(aq) + Cl2(g)
This shows that 4 moles of HCl reacts with 1 mole of MnO2
the mass of Manganese oxide is given as 5 grams
molar mass of MnO2 = 86.93 grams/mole
number of moles of MnO2 is given by
number of moles = [tex]\frac{mass}{atomic mass of one mole}[/tex]
number of moles= [tex]\frac{5}{86.93}[/tex]
= 0.0575 moles of MnO2
From the equation:
4 moles of HCl reacts with 1 mole of MnO2
x moles of HCl reacts with [tex]\frac{0.0575}{x}[/tex] moles of MnO2
[tex]\frac{1}{4}[/tex] = [tex]\frac{0.0575}{x}[/tex]
= 0.23 moles of HCl will react
atomic mass of HCl = 36.46 Grams/mole
mass = 0.23 x 36.46
= 8.3858 grams.of HCl
molarity of HCl = [tex]\frac{number of moles}{volume in liters}[/tex]
volume is 1 litre
so molarity is 0.23 M
Using the formula
M1V1 = M2V2
0.05 x 1 = 0.23 X x
x = 0.217 litre
so 217 ml of 0.05 M HCl will be required to react with 5 gm of MnO2.
Select one metal which will displace Sn from
a compound and form metallic tin (Sn).
Cu, Cr, Hg, Ag
Answers
Answer:
Cr
Explanation:
Cr will displace Sn from compound because Cr is higher than Sn in the electrochemical series of metals
Answer:
Cr
Explanation:
How many grams of CO2 or an 800 mL at 94.5 K PA at -10°C?
Answers
Answer:
1.52g
Explanation:
First, let us calculate the number of mole of CO2 present. This is illustrated below:
V = 800mL
Recall: 1000mL = 1L
800mL = 800/1000 = 0.8L
P = 94.5 KPa = 94500Pa
Recall: 101325Pa = 1atm
94500Pa = 94500/101325 = 0.93atm
T = -10°C = -10 + 273 = 263K
R = 0.082atm.L/Kmol
n =?
PV = nRT
n = PV/RT
n = (0.8x0.93)/(0.082x263)
n = 0.0345mol
Now, we can obtain the mass of CO2 as follows:
Molar Mass of CO2 = 12 + (2x16) = 12 + 32 = 44g/mol
Number of mole of CO2 = 0.0345mol
Mass of CO2 = number of mole x molar Mass
Mass of CO2 = 0.0345 x 44 = 1.52g
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The table below shows the depths at which an index fossil and three other fossils were found.
Fossil Data
Fossil Depth (meters)
A 294
B 365
C 375
Index fossil 460
Which statement is correct?
Fossil B is older than the index fossil.
The index fossil is younger than Fossil C.
Fossil A is younger than the index fossil.
The index fossil is the same age as Fossil C.
Answers
Answer:
The Correct Answer is C
Fossil A is younger than the index fossil.
Explanation:
Fossil A is younger than the index fossil is correct statement. Hence option 3 is correct.
What are fossils?Fossils are defined as an animal or plant relic, impression, or trace that has survived in the Earth's crust over time. A living object, such an animal or plant, dies and is quickly buried by debris, like mud, sand, or volcanic ash, which results in the creation of fossils. Important evidence for evolution and the environmental adaptation of plants and animals can be found in fossils.
Index fossils are fossils that are common yet were only present for a brief time. By comparing a rock layer to other rock layers, index fossils enable scientists to determine the relative age of a rock layer. Organisms that are still alive today yet have undergone little alteration over millions of years are known as living fossils.
Thus, fossil A is younger than the index fossil is correct statement. Hence option 3 is correct.
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Which scientific tool is most useful when trying to convert a known amount of grams of water to moles of water?
Answers
Answer:
The periodic table
Explanation:
The periodic table can show the atomic number and atomic mass of any atoms easily. To convert grams of water to moles of water, you need to know the atoms that made up water molecules then find out their molecular mass. Water is made of two hydrogens and one oxygen atoms. Then you can find the atomic mass of hydrogens is 1 while oxygen is 16. The molecular mass of water will be 2*1 + 16= 18g/mol.
Use the molecular weight of water as a conversion factor to convert grams to moles. Then, use the number of moles and the mass of solvent to determine the molality of the solution.
Explanation:The most useful scientific tool when trying to convert a known amount of grams of water to moles of water is the molecular weight of water, which is used as a conversion factor. The process involves converting from grams to moles using the molecular weight of water (18.01528 g/mol).
Step 1. Convert from grams to moles of water using the molecular weight of water in the conversion factor. Step 2. Determine the molality of the solution from the number of moles of the solvent and the mass of solvent, in kilograms.In general, a mole of any substance has a mass in grams numerically equal to its molecular mass. So the molecular weight is a very convenient conversion factor for such calculations.
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Question 2
For each of the following diagrams, calculate the net force on the object including the direction, and state if the forces are balanced or unbalanced
5 N
8N
Net Force
Balanced or Unbalanced:
Answers
The net force on the cube in Diagram A is 3 N to the right. The net force on the cube in Diagram B is 47 N downwards.
Diagram A
This diagram shows a cube with two forces acting on it: a 5 N force to the left and an 8 N force to the right. To calculate the net force, we need to subtract the smaller force from the larger force.
Net force = 8 N - 5 N = 3 N to the right
Diagram B
This diagram shows a cube with two forces acting on it: a 128 N force upwards and a 175 N force downwards. To calculate the net force, we need to subtract the smaller force from the larger force.
Net force = 175 N - 128 N = 47 N downwards
The net force on an object is the sum of all the forces acting on it. If the net force is zero, then the object is in equilibrium. If the net force is not zero, then the object will accelerate in the direction of the net force.
To calculate the net force on an object, we need to add up all the forces acting on it, taking into account their magnitudes and directions. We can use the following formula:
Net force = F1 + F2 + F3 + ...
Where F1, F2, F3, etc. are the magnitudes of the forces acting on the object.
In the case of Diagram A, we have two forces acting on the cube: a 5 N force to the left and an 8 N force to the right. To calculate the net force, we need to subtract the smaller force from the larger force:
Net force = 8 N - 5 N = 3 N to the right
This means that the cube will accelerate to the right.
In the case of Diagram B, we have two forces acting on the cube: a 128 N force upwards and a 175 N force downwards. To calculate the net force, we need to subtract the smaller force from the larger force:
Net force = 175 N - 128 N = 47 N downwards
This means that the cube will accelerate downwards.
A solution contains an unknown mass of dissolved barium ions. When sodium sulfate is added to the solution, a white precipitate is filtered and dried and found to have a mass of 258 mg. What mass of barium was in the original solution assume that all of the barium was precipitated out of the solution you the reaction.
Answers
Answer:
The mass of barium in the original solution was 152mg.Explanation:
The white precipiate that is formed when sodium sulfate, Na₂SO₄, reacts with barium ions in solution, Ba²⁺, is barium sulfate, BaSO₄.
The molar mass of BaSO₄ is 233.38 g/mol. Thus, the number of moles of BaSO₄ is:
#moles = mass in grams / molar mass#moles = 258mg × (1g/1,000mg) × (1mol/233.38g) = 0.00110549molSince 1 mole of BaSO₄ contains 1 mole of Ba, there are 0.00110549 mol of Ba²⁺ ions.
Use the atomic mass of Ba to calculate the mass in grams in the original solution:
mass = number of moles × atomic massmass = 0.00110549mol × 137.327g/mol = 0.1518g.mass = 151.8mg = 152mgThen, with 3 significant figures, there were 152mg of barium in the original solution.
What is the mass percent of a solution of 7.6 grams sucrose in 83.4 grams of water
Answers
Answer:
The mass percent of a solution of 7.6 grams sucrose in 83.4 grams of water is 8.351 %.
Explanation:
Given,
Mass of Sucrose = 7.6 grams
Mass of Water = 83.4 grams
In this solution, Sucrose is solute and water is the solvent.
Mass percent of a solution can be calculated using the formula,
Mass percent = (Mass of Solute/Mass of Solution)(100)
As sucrose is solute, mass of solute = 7.6 grams
As the solution contains both Sucrose and Water,
Mass of solution = 7.6 grams + 83.4 grams = 91 grams
Substituting the values, Mass percent = (7.6/91)(100) = 8.351 %.
Taking into account the definition of percentage by mass, the mass percent of a solution of 7.6 grams sucrose in 83.4 grams of water is 8.35 %.
The percentage by mass expresses the concentration and is defined as the ratio of the mass of the solute to the mass of the solution, expressed as a percentage.
The percentage by mass is calculated as the mass of the solute divided by the mass of the solution and multiplied by 100 to give a percentage. This is:
[tex]percent by mass= \frac{mass of solute}{mass of solution}x100[/tex]
In this case, you know:
mass of solute= 7.6 g mass of water= 83.4 g mass of solution= mass of solute + mass of water= 7.6 + 83.4 g= 91 gReplacing:
[tex]percent by mass= \frac{7.6 grams}{91 grams}x100[/tex]
Solving:
percent by mass= 0.0835
percent by mass= 8.35 %
Finally, the mass percent of a solution of 7.6 grams sucrose in 83.4 grams of water is 8.35 %.
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brainly.com/question/19168984?referrer=searchResults brainly.com/question/18646836?referrer=searchResultsThe gas that was released is carbon _____
Answers
Answer:
dioxide
Explanation:
the compound benzamide has the following percent composition. What is the empirical formula? C=69.40% H=5.825% O=13.21% N=11.57%
Answers
Answer:
C7H7NO
Explanation:
The following were obtained from the question:
C = 69.40%
H = 5.825%
N = 11.57%
O = 13.21%
The empirical formula can be obtained as illustrated in the attached file
If different atoms can come together to form all living and nonliving things, why is there a limit to different combinations we encounter around the universe?
Answers
Answer: gas dissolved in liquid
Explanation:
The different atoms lead to the formation of living and nonliving things then
Such as a brick is used to create a house that is nonliving but the formation of the brick needs many raw materials. The gas dissolved in liquids is one of the combinations that we have hence various atoms can come into the same universe.Learn more about why is there a limit to different combinations.
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Sugar water is a:
O Homogeneous mixture
Heterogeneous mixture
Answers
Answer:
It is a homogeneous mixture
What is the net ionic equation for Fe ( NO 3 ) 2 ( aq ) + Na 2 CO 3 ( aq ) ⟶ CaCO3 ( s ) + 2 NaNO 3 ( aq )
Answers
Answer:
Ca²⁺ (aq) + CO₃²⁻ (aq) ⟶ CaCO₃ (s)Explanation:
1. Write the balanced molecular equation(given):
Ca(NO₃)₂ (aq) + Na₂CO₃ (aq) ⟶ CaCO₃ (s) + 2NaNO₃ (aq)Notice that I replaced Fe(NO₃)₂ with Ca(NO₃)2 because Fe does not appear in the products.
2. Write the aqueous ionic compounds in form of ions:
Ca(NO₃)₂ (aq) ⟶ Ca²⁺ (aq) + 2NO₃⁻ (aq)Na₂CO₃ (aq) ⟶ 2Na⁺ + CO₃²⁻ (aq) 2NaNO₃ (aq) ⟶ 2Na⁺ (aq) + 2NO₃⁻ (aq)3. Write the overall ionic equation
In the balanced molecular molecular equation, substitute the ionic compounds with the corresponding ions:
Ca²⁺(aq) + 2NO₃⁻(aq) + 2Na⁺ (aq) + CO₃²⁻(aq) →
CaCO₃(s) + 2NO₃⁻(aq) + 2Na⁺(aq)
4. Write the net ionic equation
Remove the spectator ions (those that appear equal on both sides):
Ca²⁺ (aq) + CO₃²⁻ (aq) → CaCO₃ (s) ← answerwhat volume will 1.27 moles of helium gas occupy at stp
Answers
Answer:
28.45L
Explanation:
1mole of a gas occupy 22.4L at stp. This implies that 1mole of He also occupy 22.4L at stp.
Now if 1mole of He occupied 22.4L at stp, then, 1.27mol will occupy = 1.27x22.4 = 28.45L
Answer:
28.45L
Explanation: