Answer:
o multiply the mass of each isotope by the decimal fraction representing its abundance naturally, then add all these products together.
Explanation:
To find the average atomic mass of an atom, take the weighted average of all naturally occurring isotopes of an element and sum them together.
The average atomic mass is determined from the geonormal abundances of the isotopes.Average mass of all isotopes = summation of all the mass of isotopes of the element x abundance of the isotope.
The abundance of the isotope is usually taken as a decimal fraction.
Copper is an element that is used in electrical wires. What is the smallest unit of copper that maintains the characteristics of copper?
the atoms
O the proton
O the nucleus
O the electron
O the atoms
Answer:
I believe it is the last option: atoms
When a substance goes from a liquid to a gas, this process is considered a what
Answer:
Evaporation
Explanation:
Answer:
Boiling
Explanation:
The temperature at which a liquid begins to boil is called the boiling point (bp).
What is the relationship between the number of chromosomes in sperm/egg cells compared to regular cells?
A: sperm/egg cells and regular cells have the same number of chromosomes
B:sperm/egg cells have the twice the number of chromosomes as regular cells
C:sperm/egg cells have the half the number of chromosomes as regular cells
D:sperm/egg cells have the triple the number of chromosomes as regular cells
In a balanced equation, the number of each type of atom on the reactant side ____________ the number of each type of atom on the product side.
Doubles
Equals
Halves
Tripples
Answer:
Equals
Explanation:
What is the molar mass of (NH4)2CO3
Answer:
96.11 g/mol
General Formulas and Concepts:
Chemistry - Atomic Structure
Reading a Periodic TableExplanation:
Step 1: Define
(NH₄)₂CO₃
Step 2: Identify
Molar Mass of N - 14.01 g/mol
Molar Mass of H - 1.01 g/mol
Molar Mass of C - 12.01 g/mol
Molar Mass of O - 16.00 g/mol
Step 3: Find
Molar mass of (NH₄)₂CO₃ - 2(14.01) + 8(1.01) + 12.01 + 3(16.00) = 96.11 g/mol
Answer: 96 g is the molar mass of (Nh4)2CO3
Explanation:
Manny kicked a 2kg soccer ball at a rate of 5m/s. What is the KE of the ball???
Answer:
25
Explanation:
This questoin about physics but solution is there
Kinetic energy = 1/2 . m. V. V
m=weight
V=velocity
1/2 . 2. 25 = 25
How many moles of tin atoms are in a pure tin cup with a
mass of 38.1 g?
Answer:
0.32mole
Explanation:
Given parameters:
Mass of tin cup = 38.1g
Unknown:
Number of moles in the cup = ?
Solution:
To find the number of moles, use the expression below;
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Molar mass = 118.7g/mol
So;
Insert the parameters and solve;
Number of moles = [tex]\frac{38.1}{118.7}[/tex] = 0.32mole
I do need immediate answers, this is taking a bit of time for me to figure out
a shiny silver spoon became dull and black over time. What most likely happened to the spoon?
A. The metal mixture began to separate
B. The metal reacted with air to form a new substance
C. Dirt collected on the shiny metal
D. The metal dissolved into a black tarnish
Answer:
The Answer to your question is
A. the metal mixture began to separate
Explanation
Just took the quiz
Answer:
the answer is C in usatestprep 1,11,and 111
Explanation:
Which of these rules is applicable to subtracting two values that have different numbers of decimal places (for example, subtracting 2.1 from 2.15)? The answer is less accurate than either value. The answer is more precise than either value. The answer has the same number of decimal places as the least precise value. The answer has the same number of significant figures as the most precise value.
Answer:
The answer has the same number of decimal places as the least precise value.
Explanation:
i just took the test on edg or whatever its called but trust me i got 100.
These rules is applicable to subtracting two values that have different numbers of decimal places (for example, subtracting 2.1 from 2.15) will be "The answer has the same number of decimal places as the least precise value."
What is decimal?The accepted method for representing both integer but also non-integer numbers would be the decimal digit system.
What is numbers?A number is a numerical unit of measurement and labelling in mathematics.
These rules is applicable to subtracting two values that have different numbers of decimal places (for example, subtracting 2.1 from 2.15) will be "The answer has the same number of decimal places as the least precise value."
Therefore, the correct answer will be option (C).
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The density of pure solid copper is 8.94 g/mL. What volume does 34 g of copper occupy?
hey there ! :
Density = 8.94 g/mL
mass = 34 g
Volume = ??
Therefore:
D = m / V
8.94 = 34 / V
V = 34 / 8.94
V = 3.803 mL
Hope this helps!
What does mitochondrial exactly mean ?
mitochondrial is a disease that has long-term side effects that is often inherited. Due to this, your body may fail to produce energy effectively.
Help
How are nuclear reactions different from chemical reactions?
Answer:
Nuclear reactions involve a change in an atom's nucleus, usually producing a different element. Chemical changes involve only a rearrangement of electrons.
Explanation: Hope this helps
Brainliest?
Answer:
Chemical Reaction
Atoms are rearranged during a chemical change to create a new substance The new substance is formed during a chemical reaction cannot be changed back to its original state During a chemical reaction, the chemical bonds are broken and new chemical bonds form
Nuclear Reactions
Nuclear reactions are defined as the reaction in which there occurs change in the nucleus of an atom due to change in number of protons or neutrons of an atom.
Explanation:
identify the type of bond shown in the figure. explain your reasoning.
Answer:
could you please provide more info for the question you want an answer for?
Explanation:
true or false: some organisms reproduce by cell division
Answer:
True
Explanation:
Why do atoms with greater numbers of protons have greater electronegativity?
Answer:
the positivity charged protons in the nucleus attract the negatively charged elections.bas the number of protons in the nucleus increases, the electronegativity or attraction will increase
Why do some transition metals have multiple oxidation states?
Transition metals have multiple oxidation states because of their___
__ sublevel.
Answer:
Tbh I rlly don’t kno why
Explanation:
These ppl are waxk
Answer:
partially filled d sublevels
Explanation:
10 pts.
Please help me with my Chemistry question. :'(
plz.
Answer:
dang this hard I don't understand...
State the mass number and the atomic number of colbalt-60
two samples of water, 10 grams and 50 grams are in sperate cups which of the following properties is different for the two boiling point, color density or volumn
Answer:
volume
Explanation:
The volume of the two samples of water will be different because volume is the amount of space occupied by a body. It is dependent on the amount of materials it contains.
The 50g sample will have a higher volume compared to the 10g sample. The boiling point and density are intensive properties and do not depend on the amount of matter present. Since both samples are from the same source, they will have the same color.Answer:
its volume
Explanation:
What occurs during the recharge process? Why is recharging with a salt brine solution that
contains sodium chloride (NaCl) necessary?
(This question refers to hard water treatment)
Answer:
During the recharge process, the water infiltrates at the land's surface and flows through the unsaturated zone. It then crosses the water table and enters the groundwater system. Chloride (NaCl) is important and necessary because the sodium ions are held loosely and exchanged easily with calcium and magnesium ions.
Explanation:
C. What kind of charge do protons have?
What is the mass of a proton?
Answer:
Proton, stable subatomic particle that has a positive charge equal in magnitude to a unit of electron charge and a rest mass of 1.67262 × 10−27 kg, which is 1,836 times the mass of an electron.
Answer:
A proton has positive charge of 1
1.6726219 × 10^-27 kilograms
Explanation:
Methanol and ethanol are said to be miscible in one another. What does this tell you?
Answer:
That they are miscible in one another
Atomic #
Mass #
#p
#e
#n
charge
Symbol
1) 17
19
0
2)
180
71
109
3)
40
38
46
4) 92
238
86
206
5)
Pb4
82
6)
34
45
-2
7)
113
48
49
8) 21
42
0
31
9)
p.
15
10)
83
80
126
In the modern periodic table, the elements are listed in order of increasing atomic number. The atomic number is the number of protons in the nucleus of an atom. The number of protons define the identity of an element (i.e., an element with 6 protons is a carbon atom, no matter how many neutrons may be present).
plz ANSWER Energy exerted when a force of ____ N is applied over ____m of distance is called a__________
Answer:
1 newton over 1 meter is called a joule
Explanation:
i learned it before
Carbon can react with oxygen to form carbon dioxide. Which of the following statements about this chemical change is true?
Carbon can react with oxygen to form carbon dioxide. Which of the following statements about this chemical change is true? ... Carbon and oxygen atoms are destroyed as new atoms are formed. Carbon and oxygen atoms have the same properties as molecules of carbon dioxide.
How are
viscosity, the size and shape of particles
and internal friction related
Answer:
With the addition of heat, liquid particles move faster, decreasing viscosity. However, the addition of heat to gas particles causes them to collide with each other more often, increasing the viscosity. ... Particles with larger size and shape collide more often, increasing internal friction.
Explanation:
hope this helps you !!
As water moves through the water cycle, the total amount of water on Earth *
increases
decreases
stays the same
fluctuates with the seasons
Answer: Stays the same
Explanation:
The amount of water on the earth never leaves or runs out, so there will always be water. When water disappears, its just the process of evaporation. When water is evaporated into water vapor (gas state of matter), and the molecules are scattered through the air. Making the air humid, although you can not see the molecules, not even with a microscope.
Which best explains how the body maintains homeostasis? All systems work together to stabilize the body. Each system works independently to stabilize the body. All systems work together to match the external environment. Each system works independently to match the external environment.
Answer:
All systems work together to stabilize the body.
Explanation:
Homeostasis refers to the ability of the body to maintain a stable internal state despite the changes in the external environment. Among the options, option A, explains it bests.
Option B: This answer is partly correct in the sense that stability is achieved, however the systems work together and not independently.
Option C: This option is wrong. Stability is the goal and not matching the external environment.
Option D: This option is wrong. Stability is the goal and not matching the external environment.
The best explains how the body maintains homeostasis is all systems work together to stabilize the body.
What is homeostasis?Homeostasis is a condition in which a biological system changes its condition suitable to the environment. It is needed to survive and function properly.
Thus, the correct option is A.
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As Mia mixed two substances in a test tube, she noticed that the test tube became warm. She also noticed gas coming from the test tube. Based on Mia's observations, what was most likely occurring inside the test tube?
Answer:
This question lacks options. The options are:
A. The two substances underwent a physical change
B. The two substances were melting
C. A new substance was forming
D. A change in the mass of the two substances
The answer is C
Explanation:
Changes in chemistry can either be physical or chemical. A physical change as the name implies does not alter the chemical content of the susbtances involved. However, chemical changes affect the chemical composition of the substances, hence, new substances are produced.
A chemical change is also characterized with a color change, temperature change, gas evolution etc. In this question, Mia mixed two substances in a test tube and noticed that the test tube became warm, gas came out from the test tube. This implies a CHEMICAL CHANGE, LEADING TO THE FORMATION OF NEW SUBSTANCES.
How is the movement of the electrons different when the atoms are close?
Answer: The electrons move around between the two atoms. their positive nuclei repel each other. A covalent bond is an electric force of attraction between two atoms that share outer electrons.
Explanation: I hope that helps.
For better understanding let's explain what the statement means.
Always know that movement of the electrons often differs when the atoms are close because then electrons are said to be inclined or attracted to the other proton only when both protons are closer and the results of what happens if an individual moves the atoms very close to each other they will automatically repel or push away from each other because the same charge is present in themFrom the above we can therefore say that the answer the movement of the electrons different when the atoms are close because when two atoms are very close to each other, the electrons of each atom will then be attracted to both nuclii. If the atoms tries to get two close then the nuclii will repell each other is correct
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