To discover the number of atoms in a piece, divide its importance in grams by the periodic table's amu atomic mass, then multiply the result by Avogadro's number: 6.02 x 1023.
What is atoms?An atom is a matter particle that defines a chemical element uniquely. An atom is made up of a central nucleus and one or more negatively charged electrons.The nucleus is positively charged and contains one or more heavy particles called protons and neutrons. An atom exists as an essential particle of value that contains at least one proton.Here are a few atom examples: neon (N) and hydrogen (H) (Ne). Because atoms were once thought to be the smallest things in the universe and could not be divided, the term "atom" comes from the Greek word for indivisible.
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Provide two functions of the sweat gland pore.
Answer:
regulate temperature and remove waste
Which of the following is true about two neutral atoms of the element gold? (1 point) a The nucleus is missing in both. b Each has a different mass. c Both have the same properties. d Each has a different number of electrons.
Answer: The nucleus is missing in both. Each has a different mass. Both have the same properties. Each has a different number of electrons.
Explanation: Thank me please! have a great day! :)
which components of the atom are found outside of the nucleus? responses electrons electrons neutrons neutrons all are found in the nucleus. all are found in the nucleus. protons
Electrons are the components of the atom that are found outside of the nucleus.
In contrast to protons and neutrons, which are found inside the atom's nucleus, electrons are found outside the nucleus. Negative electrons are drawn to the positive nucleus because their opposing electric charges attract one another. This force of attraction keeps electrons flowing continuously in the otherwise empty area surrounding the nucleus, this force of attraction keeps electrons flowing continuously.
Since they are so tiny, electrons. Since an electron's mass is only a tiny fraction of that of a proton or neutron (approximately 1/2000), it is almost entirely absent from the overall mass of an atom. Electrons have an electric charge of -1, which is equivalent to but in the opposite direction of the proton's electric charge of +1.
Since there are exactly as many electrons in an atom as there are protons, the positive and negative charges "balance out," leaving the atom electrically neutral.
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d is movement of molecules from high concentration to low concentration. an example is lemon essential oil used in one corner of the room but soon smelled in the opposite corner.
A substance diffuses when it moves from a region of high concentration to one of low concentration. Because the particles in liquids and gases travel randomly from one location to another, diffusion occurs in these media. For living things, diffusion is a crucial process because it governs the flow of materials into and out of cells.
A net migration of anything from a zone of higher concentration to a location of lower concentration can also be described as it, and a gradient in concentration is what's driving it.
Without spending the cell's energy, substance that crosses a cell membrane travels away from the region where it is concentrated.
Passive transport is the term for it.
It is the process by which substances migrate down the gradient of concentration without utilizing cellular energy.
Simple diffusion is another name for it.
Due to the difference in concentration from the perfume bottle to the outside environment, when a perfume bottle is opened, particles disseminate in the air.
While, active transport substances should move in the opposite direction of the concentration gradient, or toward the area of higher concentration.
Energy is needed for this procedure.
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In an experiment, a solution required 30. 05 g of nacl, 50. 0 g of , and 0. 4006 g of mgso4. Using the correct number of significant figures, what is the resulting mass?.
When the use of significant figures and rounding up is applied correctly the mass of the mixture will be 80.5 g.
In cases of addition or subtraction, only the last significant figure of every number is taken into account.
In 30.05, this is 5, in the hundredths. When we look at 50.0, the last significant figure is 0, and it is in the tenths. And in 0.4006, the last significant figure is 6, in the ten thousandths. Of these three, the 0 from 50.0 is in the leftmost position, which means that the last significant figure of the result needs to be in the same position (in the tenths).
Moving onto the actual algebraic operation:
30.05 g + 50.0 g + 0.4006 = 80.4506 g
As we established, the last significant figure should be in the tenths, and we will have to round up 4 to 5 (trailing numbers are greater than 0), which means that the resulting mass will be 80.5 g.
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a chemist makes 86.94 grams of a black powder by reacting 54.94 grams of manganese with 32.00 grams of oxygen. if a student breaks down 144.9 grams of that powder, what mass of manganese will be made? [mn]
Based on the data given, we can make a simple proportion to calculate that 91.57 grams of manganese would be produced by the decomposition of 144.9 grams of the powder.
The initial composition of the powder tells us that in 86.94 g of it there are 54.94 grams of manganese. We can make a simple proportion to calculate how many grams of manganese are produced by decomposing 144.9 grams of the powder:
86.94 grams of powder : 54.94 grams of Mn = 144.9 grams of powder : X
X = 54.94 grams of Mn * 144.9 grams of powder / 86.94 grams of powder
X = 91.57 grams of Mn
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4.2 g of lithium (Li) reacts with 2.8 g of nitrogen (N2). Find the simplest molar ratio in which lithium reacts with nitrogen.
The simplest molar ratio in which lithium reacts with nitrogen is 6 moles of lithium to 1 mol of nitrogen.
What is molar ratio?
A molar ratio examines the ratio that exist between two chemical compounds showing the amounts in moles of the compounds involved in a chemical reaction.
Molar ratio = amount of a constituent in moles ÷ total amount of all constituents in a mixture in moles
Given:
Mass of lithium (Li) = 4.2 g
Mass of nitrogen (N2) = 2.8 g
Total amount of mass = 7g
Moles = molecular weight ÷ mass of water
Moles of lithium (Li) = 4.2 ÷ 7 = 0.60 mol
Moles of nitrogen (N₂) = 2.8 ÷ 7 = 0.10 mol
Therefore, ratio Li : N₂ = 0.60 : 0.10 = 6 : 1
6 Li + N₂
The balanced equation between lithium and nitrogen, to form lithium nitride = 6 Li + N₂ → 2 Li₃N₆L i + N₂ → 2Li₃N
In summary, the simplest molar ratio in which lithium reacts with nitrogen is 6:1
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The motion of one particle of a gas is unaffected by the motion of other particles of the gas unless the particles _____.
that liquid pressure increases with the depth on the basis of the following points materials required
does anyone know the answer to this question?
Error Percent = (80.6 - 80.4)/ 80.6 X 100 (Option a is correct)
What is the formula for calculating percentage error?Use the following equation to determine the percentage of error: [(exact value - approximate value)/exact value] x 100. Start by deducting the exact value from the approximate value. After that, divide that number by the precise amount. To get the percentage inaccuracy, multiply your response by 100 after converting fractions to decimal form.The absolute error, which is just the difference between the observed and the real value, is used to calculate percentage error. The relative error is then multiplied by 100 to produce the percentage error after the absolute error has been divided by the real number.To learn more about : Absolute error
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