Considering the definition of percentage by mass, the correct answer is option D. the percent composition of carbon dioxide is 6.6%
Percentage by massThe percentage by mass expresses the concentration and indicates the amount of mass of solute present in 100 grams of solution.
In other words, the percentage by mass of a component of the solution 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, the result of which is multiplied by 100 to give a percentage. This is:
[tex]percentage by mass=\frac{mass of solute}{mass of solution} x100[/tex]
Percent composition of carbon dioxideIn this case, you know:
mass of solute= 0.30 moles × [tex]\frac{44.01 grams}{1 mole}[/tex]= 13.203 grams (being 44.01 [tex]\frac{grams}{mole}[/tex] the molar mass of carbon dioxide)mass of solution= 200 gramsReplacing in the definition of percentage by mass:
[tex]percentage by mass=\frac{13.203 grams}{200 grams} x100[/tex]
Solving:
percentage by mass= 6.60 %
Finally, the correct answer is option D. the percent composition of carbon dioxide is 6.6%
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how many molecules are in 2NaOH
Answer:
1 moles
I assume you are converting between moles 2NaOH and gram. You can view more details on each measurement unit: molecular weight of 2NaOH or grams The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles 2NaOH, or 41.99711 grams.
Explanation:
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Number of molecules are in 2NaOH are 12.044 × 10²³.
What is mole concept?Avogadro's number is the number of units in one mole of any substance and equals to 6.02214076 × 10²³. The units can be electrons, atoms, ions, or molecules.
No. of moles is defined as a particular no. of particles that we can calculate with the help of Avogadro’s number.
Mass of a particular product is also find out by stoichiometry of a reaction as per the no. of mole given in the reaction.
Given are 2 moles of NaOH.
one mole of any substance and equals to 6.02214076 × 10²³
Therefore, Number of molecules are in 2NaOH are 12.044 × 10²³.
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What trend in atomic radius occurs down a group on the periodic table? What causes the trend?
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Explanation:
the further down the group you go, the larger the radius becomes. its caused by the amount of electrons needed to equal out the charge of the nucleus
Atomic radius increases down the group in the periodic table and due to the increase in the number of shells.
Explanation:
The group in the periodic table is a vertical column running from top to bottom.There is a total of 18 groups in the modern periodic table.Elements in the same group have the same number of valence electrons and chemical and physical properties.When we move down in a group the atomic radii of the elements increases because the number shell increases which results in increase atomic radii of the elementsMetallic character increases on moving down Non-metallic character decreases on moving down Ionization energy decreases down the group as the atomic size increases the distance of valence electrons from the nucleus also increases which reduces the effective nuclear charge on the valence electrons.So, from this, we can conclude that atomic radius increases down a group in the periodic table and due to the increase in the number of shells.
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The specific heat of water is 4.2j/g ºC how much heat is required to raise the temperature of 100 g of water by 5 ºC
Answer:
116,823 J
Explanation:
formula : q=m C delta T
q = heat = unknown
mass = 100 g
C = specific heat = 4.2 J/K*g
delta T = temperture in Kelvins: 5 + 273.15 = 278.15 K
q = (100 g) ( 4.2 J/K*g) (278.15 K) = 116,823 J
can you explain how to convert 50psi to atm ?
Answer
50 Psi = 3.4023 atm
Which statement about the ocean is true?
1. No evaporation or precipitation in the water cycle occurs over the ocean.
2. Most evaporation and precipitation in the water cycle occur over the ocean.
3.All evaporation and precipitation in the water cycle occur over the ocean.
4.Evaporation, but not precipitation, in the water cycle occurs over the ocean.
Answer: The answer is probably B because most of the precipitation and evaporation in the water cycle happens over the oceans. Including, about 78 percent of the precipitation and 86 percent of evaporation.
The statement about the ocean is true is most evaporation and precipitation in the water cycle occur over the ocean. Therefore, option 2 is correct.
What is water cycle ?The continual movement of water on, above, and below the Earth's surface is referred to as the water cycle, also known as the hydrologic cycle or the hydrological cycle.
The water cycle is composed mostly of four processes: evaporation, convection, precipitation, and collection. When water in rivers, lakes, or the ocean is heated by the sun and turned into vapour or steam, this process is known as evaporation. The river, lake, or ocean releases water vapor or steam into the atmosphere.
The hydrologic cycle is crucial because it determines how water gets to people, plants, and other species. In addition to supplying water for people, animals, and plants, it also transports nutrients, diseases, and sediment into and out of aquatic habitats.
Thus, option 2 is correct.
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please help
please help
find molecular formula of a compound with a molar mass of 45.0 g/mol and an empirical formula of CH3
what is Pb+FeSO4-->PbSO4+Fe balanced and the type of reaction?
Answer:
It's simple substitution reaction and there is no balance for the equation. It's right written.
Explanation:
a force that resists motion when objects touch is what
A force that resists motion when objects touch is friction. Frictional force is the force that prevents an object from moving.
What is friction ?The term friction is defined as the force that opposes the motion of a solid object over another. There are four types of friction that are static friction, sliding friction, rolling friction, and fluid friction.
Three factors in particular determine the frictional force between two bodies: The adhesion between body surfaces, the surface roughness, and the deformation of bodies are all factors.
Frictional force is the force that prevents an object from moving. The imperfections on the two surfaces in contact are what produce friction. The type of surfaces in contact affects friction.
Thus, A force that resists motion when objects touch is friction.
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Helppp 88.0 grams of Boron, how many atoms of Boron (B) are present?
Answer:
There are no atoms becuase atoms are not in elements.
Explanation:
An atom absorbs radiation. Select the possible changes this could have on the atom:
*it can change the atomic mass
*it can cause the atom to lose an electron
*it can cause the atom to become and ion
*it cause the atom to change element
Answer:
*it can cause the atom to become and ion
Question 6
900 mL of water is added to 100 mL of a 0.1 M solution. What is the new concentration?
0.1M
0.0001M
0.001M
0.01M
Answer:
A. is the correct point.
Explanation:
This is true because no matter how many mL of water is added, the solution only gets more height; the concentration in everything else stays the same, and water doesn't have any concentration. Very confusing, I know. Good luck!
What is the ground state electron configuration for K
Explanation:
The ground state electron configuration of ground state gaseous neutral potassium is 4s1 and the term symbol is 2S1/2.
A tissue is a group of ____________ organized to perform a specific function.
рахмаат эже Айюб в бишкек и мы стали его называть как
Answer:
brainliest please
Explanation:
A tissue is an ensemble of similar cells and their extracellular matrix from the same origin that together carry out a specific function. Organs are then formed by the functional grouping together of multiple tissues.
Describe the function of each of the following types of neurons.
a. Sensory neurons
b. Motor neurons
c. Interneurons
Energy can be .................. From one form to another................. Can be burned to make heat or electricity.
Answer:
transferred
Energy
Explanation:
Energy is the ability to change the state of bringing about a work leading to movement or generating electromagnetic radiation. There are actually many forms of energy. So, kinetic energy is a form of energy related to the movement of a body. The combustion, in turn, retrieves the potential energy chemical contained in fuels. Solar panels capture light energy to transform it into electrical energy.
ome fire extinguishers contain liquid carbon dioxide Suggest how carbon dioxide
Answer:
The CO2 Extinguisher Cannisters contain carbon dioxide in liquid form, and when the extinguisher is let off the liquid is released into the air neutralising the oxygen that the fire is feeding on, disabling the fires ability to spread.
what is rainwater harvesting
Answer:
It is a technique of collection and storage of rain water
!!! would anyone be willing to double check this :00
If 5.0 moles of O2 and 3.0 moles of N2 are placed in a 30.0 L tank at a temperature of 25° C, what will the pressure of the resulting mixture of gases be?
25° C = 298°K
P (O2) = 5.0atm
P (N2) = 3.0atm
Ptotal = 6.5atm
Answer:
you got this
Explanation:
because it is confusing
For an experiment, Yolanda rubs a cloth against a balloon and places the balloon next to running water. What happens? The balloon breaks from the pressure of the water. The charged balloon repels the water. The uncharged water is attracted to the charged balloon. The water spills over the balloon, and the balloon gets wet.
Answer:
The uncharged water is attracted to the charged balloon.
Explanation:
Electrostatics is the study of charges at rest. Neutral bodies have equal and evenly distributed positive and negative charges. However, these neutral bodies can become either positively or negatively charged. These charges can be produced by either of friction, contact or electrostatic induction.
For example, when an ebonite rod is rubbed with fur, the ebonite rod acquires a charge by friction. The ebonite rod becomes negatively charged while the fur is left with positive charges.
Similarly, for the experiment performed by Yolanda, when she rubs a cloth against a balloon, the balloon becomes negatively charged . Water is neutral in that it is composed of equal positive and negative charged particles. When she brings the balloon near the water, the positive charged particles in the water will move the water towards the negatively charged balloon since positive and negative charges are attracted to each other.
6.The atomic mass represents the weighted average of an element’s
a.Ions
b.mass numbers
c.atomic numbers
d.isotopes
Answer:
a po
Explanation:
promise HAHAHAHHAHAHAH
Answer:
isotopes
Explanation:
trust me
5 human activities that cause pollution
Explanation:
1-burning fossil fuels.
Sulfur dioxide released by the burning of fossil fuels like coal, petroleum is the major cause of air pollution.
Gases emitted from vehicles including trucks, jeeps, cars, trains, aeroplanes cause an immense amount of pollution.
2-Agricultural activities
Use of insecticides, pesticides and fertilizers in agricultural activities release harmful chemicals into the air and can also cause water pollution.
3-Exhaust from factories and industries
Manufacturing industries release a large amount of carbon monoxide, hydrocarbons, organic compounds, and chemicals into the air thereby depleting the quality of air.
Petroleum refineries release hydrocarbons and various other chemicals that cause air pollution.
4-Mining operations:
Mining is a process wherein minerals below the earth are extracted.
During this process dust and chemicals are released in the air causing massive air pollution.
200cm3 of hydrogen diffused through a porous pot in 40secs. How long will it take 300cm3 of chlorine to diffuse the same pot?
A 1.00 L volume of dry air is sealed inside of a round flask and brought to a temperature of 50.0°C in
a hot water bath. If the pressure gauge reads 3.60 atm, how many moles of gas are in the sample of
air?
Answer:
0.136mol
Explanation:
Using the general gas law equation as follows:
PV = nRT
Where;
P = pressure (atm)
V = volume (Litres)
n = number of moles (mol)
R = gas constant (0.0821 Latm/mol K)
T = temperature (K)
K = °C + 273
K = 50°C + 273
K = 323K
According to this question, P = 3.6atm, T = 323K, V = 1.00L, R = 0.0821 Latm/mol K, n = ?
3.6 × 1 = n × 0.0821 × 323
3.6 = 26.52n
n = 3.6/25.52
n = 0.1357
n = 0.136mol
Atomic Radius________across (left to right) a period and______down a group.
Answer: Decreases across the period and increases down the group
Q11
1 point
4.8 g of Magnesium reacts with 3.2g of oxygen.
Choose the correct mass of oxygen that will react with 48g of Magnesium?
68g
18g
32g
36g
Answer:
Amount of oxygen react with 48 g of magnesium = 32 gram
Explanation:
Given:
Amount of oxygen react with 4.8 g of magnesium = 3.2 g
Find:
Amount of oxygen react with 48 g of magnesium
Computation:
Using Law of equal proportion;
Amount of oxygen react with 48 g of magnesium = 48(3.2/4.8)
Amount of oxygen react with 48 g of magnesium = 32 gram
A rock that falls off a cliff represents both potential and kinetic energy. Which statement best represents the energy transformation involved in this scenario? As the potential energy decreases, the kinetic energy decreases. As the potential energy decreases, the kinetic energy decreases. As the potential energy increases, the kinetic energy increases. As the potential energy increases, the kinetic energy increases. As the potential energy decreases, the kinetic energy increases. As the potential energy decreases, the kinetic energy increases. As the potential energy increases, the kinetic energy stays the same
Answer:
as the potential energy decrease the kinetic energy increases
Explanation:
at the cliff it possess maximum potential energy but as it falls it possess maximum Kinetic energy
When the rock is still stationary at a height, it possess all potential energy. As it begins to fall from the height, potential energy decreases and kinetic energy increases.
Energy transformations involve the change of energy from one form to another in accordance with the principle of energy conservation.
For a rock found at a height, all it has is potential energy. This potential energy decreases when the rock begins to fall and kinetic energy increases accordingly.
Hence, for a rock that falls off a cliff, as the potential energy increases, the kinetic energy increases.
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Small pools of water with ocean life.
One day, while walking along the coast, you encounter the area pictured here. You notice that most of the water is gone at low tide and that an abundance of life lives in this area.
To which ocean zone does this area belong?
Answer:
Intertidal zone (i think)
Explanation:
Answer:
A
Explanation:
What is a fuel ?....................................
Answer:
A fuel is a natural substance that, when burned, produces energy (usually thermal/heat energy)
Answer:
Fuel is something that can be used to make some actions happen. Fuel is something that can be made to react with some other substances so that it releases energy as heat energy or some other kind of energy
Please help if you can't see the awnsers there
A cytosine and Adenine
B adenine and deoxyribose
C cytosine and gallium
D phosphate and ribose
MAX TEN MINUTES PLZZZZZ HURRY
Essential Question:
How does the transfer of thermal energy become minimized or maximized?
explain you hypothisith
Answer:
when it reduces heat.
Explanation:
Thermal energy is transferred to material,the motion of its particles speeds up and it's temperature differences.Insulating materials are bad conductors and so this reduces the heat loss by conduction.The material also prevents air circulating inside the cavity,therefore reducing heat loss by convection.Heat loss through the roof can be reduced by laying loft insulation.