Which group of elements are the peaks on the graph?
A. alkali metals
B. alkaline earth metals
C. transition metals
D. halogens
E. inner transition metals
F. noble gases
Answers
Bc it takes the most amount of energy to create and ion
Or remove or add an electron
Noble gases are stable bc they have a full valence shell so it requires a huge amount of energy to remove or add electrons to make an ion
Related Questions
Jennifer checked the pressure in her bike tires before school and they had a pressure of 0.890 atm. She checked the tire pressure again after school and they had a pressure of 1.01 atm. Why was there an increase in pressure? Check all that apply.
The temperature increased outside.
The temperature decreased outside.
The air molecules in the tire moved around more rapidly later in the day and collided with the tire
walls with more force.
There was a hole in the tire.
Answers
The reasons why there was an increase in pressure after school in Jennifer's bike's tires were:
The temperature increased outside.The air molecules in the tire moved around more rapidly later in the day and collided with the tire walls with more force.Why was there an increase in pressure?As a result of the temperature increasing outside the tires on account of there being more heat during the day time, the air molecules in the tire became heated up and gained more kinetic energy.
This allowed them to move more rapidly and collide with the walls of the tire which much more force so that when Jennifer checked the pressure again, it had increased.
In conclusion, options A and C are correct.
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Which of the following molecules is nonpolar?
O A. CO2
O B. NO
ос. со
O D. SO2
Answers
What is the momentum of a stationary truck with a mass of 2000 kg? Need help ASAP
Answers
Answer:
0 its stationary it has no momentum
Explanation:
How many moles are in a mass of 800.0 g of magnesium?
Answers
Answer:
32.92 moles of Mg
Explanation:
To convert grams to moles (Or vice versa) of any chemical compound we need to use the molar mass of the substance (That is, how many grams weighs 1 mole of the chemical).
The magnesium, Mg, has a molar mass of 24.305g/mol. That means in 800.0g of Mg you have:
800.0g * (1mol / 24.305g) =
32.92 moles of Mg1st law, 2nd law, 3rd law?
Answers
Answer:
2nd law
Explanation:
newtons second law states that the force F acting on a body is equal to the mass m of the body multiplied by the acceleration a of its center of mass.
What is the acceleration of a ball with a mass of 0.40 kg is hit with a
force of 16N?
A. 0.4 m/s2
C. 400 m/s2
B. 40 m/s2
D. 4000 m/s
What is the external force od
Answers
Egyptian papyrus with 63% of its original carbon-14 atoms what is the age year
Answers
Answer:
help me
Explanation:
plz
Solids and liquids are virtually incompressible whereas gases are compressed all the time. Describe why this is true – what special properties of a gas allow this?
Answers
Solids and liquids are virtually incompressible whereas gases are compressed all the time, This is true because of their properties of shape volume properties where, Solids have a definite shape and volume, no definite shape and volume.
What are the properties of gas and solids?Generally, Gases are widely dispersed and are not strongly held together atomically.
Therefore, the space occupied can be comprised from one area to another
While Solids are hardly compressible because
They are strongly held and will rather break on tryingBecause their atoms are tightly held there is little or no space to compress to.Read more about volume
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What makes an amoeba different from a cougar?
Answers
Answer:
They are single celled organisms and they are microscopic
Explanation:
Which source of power can reduce emission of carbon dioxide?.
Answers
Answer:
Applying smart electric grid technologies can potentially reduce CO 2 emissions. Electric grid comprises three major sectors: generation, transmission and distribution grid, and consumption. Smart generation includes the use of renewable energy sources (wind, solar, or hydropower).
Explanation:
hope this helps
PLEASE HELP FILL IN TABLE
Answers
In order to determine the concentration of this basic solution (NaOH), you should titrate it with an acid solution of known concentration (HCl)
What is titration?Titration is also referred to as volumetric analysis or titrimetry and it can be defined as a chemical process in which a solution of known concentration (titrant) is slowly added to a solution of unknown concentration, in order to determine the concentration or quantity of the analyte (solution of an unknown concentration)
In this experiment, a titration would be done to determine the concentration of a basic solution (NaOH) by titrating it with an acid solution of known concentration (HCl) that neutralizes the basic sodium hydroxide (NaOH) solution.
At an equivalence point during a titration, the number of moles of acid are equal to the number of moles of base. Thus, we can derive a mathematical expression (molarity) for the analyte and titrant as follows:
[tex]Molarity = \frac{moles\;of\;soute}{Volume\;in\;liters} \\\\Moles\;of\;soute=M \times V\\\\M_AV_A=M_BV_B[/tex]
In conclusion, you'll have to conduct an experiment to determine the unknown parameters and then substitute them into the formula given above.
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What model would represent individual atoms of different types that repeat to form a crystal
Answers
Answer:
Although atoms are the smallest units that can be found in all matter, these atoms have a complex structure when experimentally analyzed. In order to understand almost all concepts in chemistry, it is essential to clearly understand the basic structure of an atom. Crystals are solid compounds made out of a number of atoms or molecules. There are particular arrangements in crystals. These arrangements are called crystal structures. Examining the crystal structure is very important in determine
Explanation:
Answer:
Although atoms are the smallest units that can be found in all matter, these atoms have a complex structure when experimentally analyzed. In order to understand almost all concepts in chemistry, it is essential to clearly understand the basic structure of an atom. Crystals are solid compounds made out of a number of atoms or molecules. There are particular arrangements in crystals. These arrangements are called crystal structures
Explanation:
which Souce energy are commonly
used in our Bhutan?
Answers
Answer:
Wind
Explanation:
Because, The strong wind can be used to turn turbine to generate electricity to light the houses in Bhutan.
What is the density of an object with a mass of 120g and a volume of 60mL?
Answers
Answer:
density = 2g/ml
Explanation:
density = mass/volume
mass = 120gh
volume = 60ml
density = 120g/60ml
density = 2g/ml
Juan Carlos placed 35 grams of ke into a dry, 200-gram container. The top of the container was attached tightly. When the ice was completely melted, the student
A.35
B.165
C.200
D.235
20 POINTS!!
Answers
Juan Carlos placed 35 grams of ke into a dry, 200-gram container. The top of the container was attached tightly. The mass of liquid water in the container is the same as ice. Therefore, the option A is correct.
What do you mean by mass ?The amount of matter in a particle or object is represented by mass (symbolized m), which is a dimensionless quantity. The kilogram is the International System (SIstandard )'s unit of mass (kg).
Mass is a quantitative measure of inertia and a fundamental property of matter. It is the resistance that a body of matter offers to change in speed or position when force is applied. The smaller the change produced by an applied force, the greater the mass of the body.
Because the number of particles does not change during a change of state, mass does not change. It makes no difference whether a substance freezes, boils, melts, or sublimates.
Thus, option A is correct.
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In terms of acids and bases, what does neutralization mean?.
Answers
Answer:
Neutralization is when the pH (power of hydrogen ions) of a solution is at 7 (considered neutral in the pH scale). This means it's neither acidic nor basic and is neutral. In order to neutralize an acidic solution, you pour in the same amount of a strong base. And in order to neutralize a basic solution, you pour in the same amount of a strong base.
A neutralization reaction will give you salt and water. A common neutralization reaction could be:
HCl (strong acid) + NaOH (strong base) ----> NaCl (Salt) + H2O (water)
what liquid has the density of 900g/L
Answers
Answer:
Oil, lubricating
Explanation:
What is the kinetic energy of a toy truck with a mass of 0.75 kg and a velocity of 4 m/s
Answers
Answer:
The answer is 6 JExplanation:
The kinetic energy of an object can be found by using the formula
[tex]KE = \frac{1}{2} m {v}^{2} \\ [/tex]
where
m is the mass
v is the velocity
From the question we have
[tex]KE = \frac{1}{2} \times 0.75 \times {4}^{2} \\ = \frac{1}{2} \times 0.75 \times 16 \\ = 0.75 \times 8[/tex]
We have the final answer as
6 JHope this helps you
How many moles of kno3 are in 500.0 ml of 2.0 m kno3? mol kno3
Answers
Answer:
1mole
Explanation:
The concentration of a substance is the amount of the solute present in a given quantity of solution. It is the number of moles of the solute in 1 L of the solution. Here the number of moles is 4.
What is a mole?One mole of a substance is defined as that quantity of it which contains as many entities as there are atoms exactly in 12 g of carbon - 12. The formula used to calculate the number of moles is:
Number of moles = Given mass / Molar mass
The equation connecting concentration, volume and the number of moles is:
n = C / V
n = Number of moles
C = Concentration
V = Volume
1L = 1000 mL
500 mL = 0.5 L
n = 2.0 / 0.5 = 4
Thus the number of moles is 4.
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A cup of hot chocolate that has been stirred with a spoon.
Which statement describes how heat flows from the coffee to the part of the spoon in the coffee?
Heat flows from the coffee to the spoon through radiation.
Heat flows from the coffee to the spoon through convection.
Heat flows from the coffee to the spoon through conduction.
Heat flows from the coffee to the spoon through radiation, convection, and conduction.
Answers
Answer: Heat flows from the coffee to the spoon through conduction.
each atom contains a equal number of
Answers
When an atom has an equal number of electrons and protons, it has an equal number of negative electric charges (the electrons) and positive electric charges (the protons). The total electric charge of the atom is therefore zero and the atom is said to be neutral.
Answer:
molecules
Explanation:
Each atom contains a equal number of molecules
2. As the concentration of a solution increases how does the amount of light absorbed vary?.
Answers
Answer:
Absorbance increases.
Explanation:
Recall that absorbance is directly proportional to concentration as illustrated by Beer's Law:
[tex]\displaystyle A = \epsilon bC[/tex]
Where A is the absorbance and C is the concentration of the solution.
Therefore, as the concentration of a solution increases, the amount of light absorbed (absorbance) likewise increases.
What is a periodic trend?
O A. An older version of the periodic table
O B. A pattern that appears on the periodic table
C. Any characteristic of the noble gases
O D. A numbering system for the periodic table
Answers
Answer:
b
Explanation:
I need help on this question
Answers
Answer:
brain HSHSHSHSHHSSHSHS
Acid rain continues to ba a global problem. Acid rain is the generic name given to precipitation that has bee
Answers
Answer:
acid rain is the acidification of the clouds and rain due to the pollution in the air
"Acid rain is the generic name given to precipitation that has bee" lol
What volume will 2.0 moles of nitrogen occupy at 720 torr and 20.0°c? formula: pv = nrt (r = 62.396 l•torr/mol•k) 3.5 l 6.6 l 48 l 51 l
Answers
The ideal gas law is the state equation of a hypothetical ideal gas. The volume of the nitrogen gas is 51 I.
What is the ideal gas equation?The general gas equation, commonly known as the ideal gas law, is the state equation of a hypothetical ideal gas. The ideal gas equation is formulated as:
PV = nRT
In this equation, P refers to the pressure of the ideal gas, V is the volume of the ideal gas, n is the total amount of ideal gas that is measured in terms of moles, R is the universal gas constant, and T is the temperature.
As it is given that the pressure on the nitrogen is 720 torr, the temperature of the gas is 20°C(293 k), and the moles of nitrogen are 2.0 moles. Therefore, using the ideal gas equation the volume of the nitrogen can be written as,
[tex]pv=nRT\\\\v = \dfrac{nRT}{p}\\\\v = \dfrac{2 \times 62.396 \times 293}{720}\\\\v = 50.7834 \approx 51[/tex]
Thus, the volume of the nitrogen gas is 51 I.
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Answer:
answer in picture
Explanation:
What pattern is there with regard to valence electrons, oxygen bonding ratio and electron configuration
Answers
The elements that have the highest valence electrons, oxygen bonding ratio and electron configuration are found towards the bottom right corner of the periodic table.
What is the periodic table?The periodic table is an arrangement of elements in groups and periods. The groups are vertical while the periods are horizontal and all the elements belong to one group or the other.
The pattern that exists in the periodic table regarding valence electrons, oxygen bonding ratio and electron configuration is that the elements that have the highest valence electrons, oxygen bonding ratio and electron configuration are found towards the bottom right corner of the periodic table.
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Answer:
The further down and to the right one goes, the higher the number of valence electrons, oxygen bonding ratio, and electron configuration.
Explanation:
Chem 101
Calculate the mass, in grams, of 2.95 mol of argon, Ar.
mass of Ar:
Calculate the mass, in grams, of 0.627 mol of nitrogen dioxide, NOZ.
mass of NO2:
Answers
Answer:
118 g of Ar; 28.8 g of [tex]NO_{2}[/tex]
Explanation:
To convert from moles to grams, you simply multiply by the atomic mass. So the conversion table looks as follows:
[tex]\frac{2.95 mol}{1} *\frac{39.95 g}{1 mol}[/tex]
The mol units cancel, and you are left with 118 g of Argon (117.8525 without sig-figs).
As for the next part of our problem, the first thing we need to do is find the molar mass of [tex]NO_{2}[/tex]. e can do this by adding the weight of all the atoms within the compound:
N + 2(O) = (14.01) + 2(16) = 46.01 g
Then, we repeat the above process, except we use the molar mass we just found instead of the atomic weight:
[tex]\frac{0.627 mol}{1}*\frac{46.01 g}{1 mol}[/tex]
Once again, the mol units cancel, and we are left with 28.8 g of [tex]NO_{2}[/tex] (28.84827 before sig-figs).
Which is the electron configuration for bromine?
A) 1s22s22p63s23p64s23d104p5
B) 1s22s22p63s23p64s23d104p6
C) 1s22s22p63s23p44s23d104p5
D) 1s22s22p63s23p64s23d94p5
Answers
Answer: A) 1s22s22p63s23p63d104s24p5
Answer:
A
Explanation:
right on edge
Which of the following covalent bonds is the most polar?
Select one:
оа. Н-Н
O b. H-N
O c. H-C
O d. H-O
Answers
Answer:
D.) H-O
Explanation:
Polarity is determined based on the difference in electronegativity of the atoms. The greater the difference, the more polar the bond. The general trend is that the atoms in the top-right corner of the periodic table are the most electronegative.
A.) is incorrect because H-H has no electronegativity difference, making it nonpolar.
B.) and C.) are incorrect because their electronegativity differences are not the greatest.
D.) is correct because the electronegativity difference between the H and O is the greatest.