As we move left to right across Period 3 from Sc to Zn, the energy needed to remove an electron from an atom generally increases.
What is Periodic Table?Periodic table is the arrangement of chemical elements according to their atomic number in the tabular form. It is arranged from the lowest atomic number to highest atomic number i.e. the total number of protons in the atomic nucleus are in the increasing order.
In this type of recurring pattern which is called as periodic law in their properties in which elements in the same column (group) have similar properties.
The horizontal rows which goes from left to right is called as periods (7 in numbers) where the vertical columns which goes from up to down are called groups (18 in numbers). There is a square for each element includes a number and letters. These letter are the chemical name for the element like Hydrogen is H but for silver it is Ag. The number present is the atomic number. There are total 118 elements but only 94 is naturally exist on Earth.
So, as we move left to right across Period 3 from Sc to Zn, the energy needed to remove an electron from an atom generally increases.
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How can flame color identify an unknown metal?
How can a spectrum positively identify an element?
How can astronomers tell which elements a star contains without a sample of it?
which of the following affect the discharge of ions in electrolysis
Answer:
Discharge of ions during electrolysis is affected by, current apllied, the time of electrolysis, electrode type, posiiton of metal in electrochemical.
Explanation:
What volume is occupied by 22.1 g of O2 at 52°C and a pressure of 1.63 atm?
How many liters of SO2 will be produced from 26.9L O2?
Answer:
8 litres of SO2 will produced from 26.9L o2
Plz help me well mark brainliest if you are correct!
Answer:
c: heat and erosine
Explanation:
What is the smallest unit of cellular organization? O organ system O cell 0 tissue O organ
Answer:
B. The cells.
call
Cells are considered the basic units of life in part because they come in discrete and easily recognizable packages. That's because all cells are surrounded by a structure called the cell membrane — which, much like the walls of a house, serves as a clear boundary between the cell's internal and external environments.
Arctic foxes grow new fur with different seasons. They grow brown fur in the summer and white fur in the winter. These changes are examples of which survival characteristic?
adaptation
hibernation
metamorphosis
migration
Answer:
Adaptation.
Explanation:
The survival characteristic adopted by Arctic foxes during different seasons is called adaptation.
The term adaptation is used to define any behavioral or physical characteristics adopted by animals to help them survive their environment. The survival characteristics in the animal can be categorized into three domains: body parts, body coverings, and behaviors. In Arctic foxes, we see body coverings survival characteristics.
Therefore, option A is correct.
A student performed an experiment in which 10 mL of a strong acid was placed on a sample of limestone. Bubbles formed where the acid touched the limestone. After 20 minutes, the bubbling stopped and the surface of the limestone appeared unchanged. What is an observation that suggests a chemical reaction did in fact take place between the acid and the limestone?
a) The limestone appeared to be unchanged.
b) The acid had to be prepared beforehand.
c) Bubbles formed where the acid and limestone touched.
d) None of the above
Answer:
Answer is D, None of the above :)
Explanation:
What is the molarity of a 250ml KCl solution made by diluting 175mL of a 3.00 M solution?
Answer:
2.1 M
Explanation:
The dilution equation is [tex]M_{s} V_{s} = M_{d} V_{d}[/tex].
[tex]M_{s}[/tex] = the molarity of the sock solution
[tex]V_{s}[/tex] = the volume of the sock solution
[tex]M_{d}[/tex] = the molarity of the diluted solution
[tex]V_{d}[/tex] = the volume of the diluted solution
The stock solution would be what is doing the diluting, so "175 mL of a 3.00 M solution". So [tex]M_{s}[/tex] = 3.00 M. Then: Converting 175 mL to liters: [tex]175 mL * \frac{1 L}{1000mL} = 0.175 L[/tex] (This is [tex]V_{s}[/tex])
And converting 250 mL KCl to liters: [tex]250 mL * \frac{1 L}{1000mL} = 0.250 L[/tex] (This will be [tex]V_{d}[/tex])
Then, we plug in our given into the dilution equation, resulting in:
[tex]3.00 M * 0.175 L = M_{d} * 0.250 L[/tex] (divide both sides by 0.250 L, in order to get [tex]M_{d}[/tex] by itself)
[tex]\frac{3.00 M * 0.175 L}{0.250 L} = M_{d}[/tex]
[tex]M_{d} = 2.1 M[/tex]
So, the molarity of 250 mL KCl made by diluting 175 mL of a 3.0 M solution would be 2.1 M (mol/L).
Hopefully this helped you understand the topic a little bit better. I just finished molarity and dilutions in Chemistry last week. Good luck!
how many energy levels are known about Bohr's atomic model?
Which compound contains a bond with the least ionic character? A. CO B. CaO C. K2O D. Li2O
Answer:
A. CO
Explanation:
This is the answer I believe based on that it has the least amount of elements leading me to think that it would have the least ionic character.
The compound that contains a bond with the least ionic character is CO.
Ionic bonding involves transfer of valency electrons. Usually from a metal to a non metal.
The ionic character or nature of a bond is determined by the relative
electronegativity of the atoms involved.
So, the bigger the difference between the electronegativity of two atoms, the more likely it is to be ionic.
This simply implies that if the electronegativity differences of the atoms
involved are smaller, the ionic character will be small.
Therefore, the compound that contain a bond with the least ionic character is CO.
The difference in negativity of the carbon and oxygen atoms are small, this is
why the compound CO among the options possess the least ionic character.
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4. Charles' law describes the relationship between which two quantities?
A.pressure and volume
B.miles and pressure
C. Volume and temperature
D.temperature and moles
Answer:
C i think im so sorry if is wrong
Charles' law describes the relationship between volume and temperature.
What is charles law?
Charles's law, a statement that the volume occupied by a fixed amount of gas is directly proportional to its absolute temperature.
Charles's law, a statement that the volume occupied by a fixed amount of gas is directly proportional to its absolute temperature, if the pressure remains constant
Hence,option C is correct.
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A 50.0 mL sample of an aqueous H2SO4 solution is titrated with a 0.375 M NaOH solution. The equivalence point is reached with 62.5 mL of the base. The concentration of H2SO4 is ________ M. A 50.0 mL sample of an aqueous H2SO4 solution is titrated with a 0.375 M NaOH solution. The equivalence point is reached with 62.5 mL of the base. The concentration of H2SO4 is ________ M. 0.150 0.234 0.300 0.469 0.938
Answer: The concentration of [tex]H_2SO_4[/tex] is 0.234 M
Explanation:
According to the neutralization law,
[tex]n_1M_1V_1=n_2M_2V_2[/tex]
where,
[tex]n_1[/tex] = basicity [tex]H_2SO_4[/tex] = 2
[tex]M_1[/tex] = molarity of [tex]H_2SO_4[/tex] solution = ?
[tex]V_1[/tex] = volume of [tex]H_2SO_4[/tex] solution = 50.0 ml
[tex]n_2[/tex] = acidity of [tex]NaOH[/tex] = 1
[tex]M_1[/tex] = molarity of [tex]NaOH[/tex] solution = 0.375 M
[tex]V_1[/tex] = volume of [tex]NaOH[/tex] solution = 62.5 ml
Putting in the values we get:
[tex]2\times M_1\times 50.0=1\times 0.375\times 62.5[/tex]
[tex]M_1=0.234M[/tex]
Therefore concentration of [tex]H_2SO_4[/tex] is 0.234 M
3) During the day at 27°C a cylinder with a sliding top contains 20.0 liters
of air. At night it only holds 19 liters. What is the temperature at night?
Answer:
[tex]T_2=12\°C[/tex]
Explanation:
Hello there!
In this case, according to the Charles' law equation which help us to understand the directly proportional relationship between volume and temperature:
[tex]\frac{T_2}{V_2}=\frac{T_1}{V_1}[/tex]
Thus, by solving for the final temperature, T2, and making sure we use the temperatures in Kelvin, we can calculate the final temperature as shown below:
[tex]T_2=\frac{T_1V_2}{V_1} \\\\T_2=\frac{(27+273)K*19L}{20.0L}\\\\T_2=285-273\\\\T_2=12\°C[/tex]
Best regards!
Best regards!
During the day at 27°C a cylinder with a sliding top contains 20.0 liters
of air. At night it only holds 19 liters and at that time temperature will be 12 °C.
What is Charles' law?Charles's law, a statement that the volume occupied by a fixed amount of gas is directly proportional to its absolute temperature, if the pressure remains constant.
According to Charles's law:
[tex]\frac{T_2}{V_2} = \frac{T_1}{V_1}[/tex]
Thus, by solving for the final temperature, [tex]T_2[/tex], and making sure we use the temperatures in Kelvin, we can calculate the final temperature as shown below:
[tex]T_2}= \frac{T_1 X\;V_2}{V_1}[/tex]
[tex]T_2}= \frac{(27 + 273)\; X\;19 liters}{20.0 liters}[/tex]
[tex]T_2= 12[/tex] °C
12 °C is the temperature at night.
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Balance the single replacement chemical reaction.
Explanation:
B) 3CuCl2+2AL..….2AlCl3+3Cu
hope it helps.
Balanced Equation:
3CuCl₂ + 2Al = 2AlCl₃ + 3Cu
can someone help me???
Answer:
Waning Crescent
Explanation:
Hope iT Help
Brainliest please
What is the name of the structure formed when fertilization occurs?
Answer:
zygote
Explanation:
I got this online
Answer:
ᘔYᘜOTᗴ:=> In human fertilization, a released ovum (a haploid secondary oocyte with replicate chromosome copies) and a haploid sperm cell (male gamete)—combine to form a single 2n diploid cell called the zygote.
ʰᵒᵖᵉ ⁱᵗ ʰᵉˡᵖˢ
[tex] \infty \infty [/tex]
24. A wave has a speed of 50 m/sec. If its frequency is 100 Hz,
what is its wavelength?
Answer:
I guess
Wave speed= Frequency x Wavelength
-> Wavelength= Wave speed divide Frequency
-> 50m/s divide 100Hz= 0.5m
I hope it help! :)
Answer that pls will give brainlist
Answer:
1. went on the first manned launch during the Apollo mission
2. responsible for all spacecraft systems
3. 4500 hour
4. published All-American Boys
5. Joined back in space organization as a consultant to inspire next generation for mars
A buffer solution is 0.439 M in CH3COOH and 0.311 M in CH3COONa . If K_a for CH2COOH is 1.8x10^-5, what is the pH of this
buffer solution?
Please no link answers!
Answer:
whats CH3COOH please tell me so I can answer!
After balancing this equation, how many oxygen atoms are present on the product side of the following equation:
C3H8 + 02 --> CO2 + H20
A.10
B.42
C.2
D.3
Answer:
B
Explanation:
POINTSSS AND BRAINLIEST IF YOU ANSWER CORRECTLY!!! Write about the law of conservation of energy and where light energy goes. thank you :)
Answer:
The law of conservation of energy states that the total energy is constant in any process. Energy may change in form or be transferred from one system to another, but the total remains the same.
Could you please help me with the two most recent questions of mine on my page? I will give u brainliest and 20 points! :))) X
if a sample is 0.5g but has an impurity of 70% what is the real mass of the sample(pure)?
Answer:
0.15
Explanation:
0.5 is100% of the total mass if 70% is impure .find the mass of 70%
which is 0.35g take 0.5 -0.35 =0.15
0.15 is the mass of the pure sample
Which of these is most likely made of pieces of rock that are weathered by water and wind?
O A diamonds
OB sand
OC grass
OD vegetables
Answer:
The answer would be sand.
Explanation:
Sand is weathered down tiny pieces of rock. Sand flows down rivers to shores and slowly builds up to form beaches.
Answer:
The Answer is gonna be B sand
How is the molar mass of an element determined?
O A. The atomic mass unit times Avogadro's number is the molar
mass.
B. The number of moles in grams is the molar mass of the element.
C. The atomic mass in g/mol is the molar mass of the element.
D. The atomic number in g/mol is the molar mass of the element.
(2pts) Post-lab Questions (1pts) 1. Do you expect the solubility of Borax to increase or decrease as temperature increases? Select the option that best explains why. Solubility will increase, because as T increases the − Δ H ∘ R T −ΔH∘RT term becomes smaller therefore K will get larger. Solubility will increase, because as T increases the − Δ H ∘ R T −ΔH∘RT term becomes smaller therefore K will get smaller. Solubility will decrease, because as T increases the − Δ H ∘ R T −ΔH∘RT term becomes smaller therefore K will get smaller. Solubility will decrease, because as T increases the − Δ H ∘ R T −ΔH∘RT term becomes smaller therefore K will get larger. Choose... (1pts) 2. Why was it necessary to make sure that some solid was present in the main solution before taking the samples to measure Ksp? Select the option that best explains why. To make sure no more sodium borate would dissolve in solution. To ensure the dissolution process was at equilibrium. To make sure the solution was saturated with sodium and borate ions. All of the above
Answer:
1. Solubility will increase, because as T increases the − Δ H ∘ R T −ΔH∘RT term becomes smaller therefore K will get larger.
2. To ensure the dissolution process was at equilibrium.
Explanation:
Given that;
ΔG°= -RTlnK
and
ΔG° = ΔH° - TΔS°
So;
-RTlnK = ΔH° - TΔS°
lnK = ΔH°/-RT - TΔS°/-RT
lnK = -(ΔH°/RT) + ΔS°/R
K = e^-(ΔH°/RT) + ΔS°/R
Hence, Solubility will increase, because as T increases the − Δ H ∘ R T −ΔH∘RT term becomes smaller therefore K will get larger.
2.
Since solubility is an equilibrium process, it means that some undissolved solute must be present in order to determine the solubility product correctly.
Solubility is the ability of the solute to dissolve in the solution. As temperature increases, the solubility increases, and the presence of solid ensure dissolution.
What is Gibbs energy?The Gibbs free energy is the change in the energy of a system from the energy present in the reactant towards the product formation.
It is given as,
[tex]\rm \Delta G^{\circ}= \rm -RTlnK \\\\\rm \Delta G ^{\circ} = \Delta H ^{\circ} - T\Delta S ^{\circ}[/tex]
Equating both equations we get:
[tex]\begin{aligned} \rm -RTlnK &= \rm \Delta H ^{\circ} - T\Delta S ^{\circ}\\\\\rm lnK &=\rm -(\dfrac{\Delta H ^{\circ}}{RT}) + \dfrac{\Delta S ^{\circ}}{R}\\\\\rm K &=\rm e^{-(\frac{\Delta H ^{\circ}}{RT}) + \frac{\Delta S ^{\circ}}{R}}\end{aligned}[/tex]
Thus, the solubility of the substance increases with an increase in temperature.
The solubility product is estimated correctly by the equilibrium process that ensures the presence of the undissolved solute particles.
Therefore, 1. option A. solubility increases and 2. option B. to ensure the equilibrium process are the correct options.
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Which of these affects the motion of an object
A. the position of nearby objects
B. the force acting on the object
C the object's length
D. the age of the object
Answer:
B
Explanation:
If an object is acted upon by another force this will cause it to change the direction and velocity of where it is going.
A wave travels at 22 m/s and has a wavelength of 11 m. What is its frequency
The answer is 2Hz
To calculate frequency, divide the number of times the event occurs by the length of time.
What is the most likely effect of people logging a forest faster than it can grow back?
The forest will eventually disappear and no longer provide any resources.
The forest will eventually reach a smaller population size and remain at that size.
The forest will gradually grow faster to keep up with increased demand.
The forest will keep its current population size and continue to provide resources.
Answer:
D
Explanation:
A growing body of scientific evidence shows that the felling of tropical forests creates optimal conditions for the spread of mosquito-borne scourges, including malaria and dengue. Primates and other animals are also spreading disease from cleared forests to people.
1.Calculate the percentage of the components of the compounds resulting from the following reactions
(A) 222.6g N combined fully with 77.4g of O.
(B) Decomposition of table salt which yields 2.62g of Na and 4.04g of Cl.
Answer:
Explanation:
I believe its A
