Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Therefore, cobalt has larger atomic radius than nickel.
What is element?Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.
On going down the group of periodic table size increases due to increase in number of shells, on going from left to right in a period the size decreases because of increase in effective nuclear charge. Cobalt or nickel comes in the same period, cobalt comes first to nickel. Cobalt has larger atomic radius than nickel. Ni and Co belongs to d block.
Therefore, cobalt has larger atomic radius than nickel.
To know more about element, here:
https://brainly.com/question/8460633
#SPJ2
What is the molar mass of Pb(ClO )4 ?
Answer:
605.0024
The molar mass and molecular weight of Pb(ClO4)4 is 605.0024.
Explanation:
How many moles are in 45.5 g of P2O5 ?
Answer:
0.327214 mol
Explanation:
45.5/278.106=0.163607
Then, 0.163607x2= 0.327214
The Kₐ of carbonic acid is 4.3 x10⁻⁷ . H₂CO₃ ⇄ H⁺ + HCO₃ ⁻ This means that H₂CO₃ is a
A) Good hydrogen-ion acceptor.
B) Poor hydrogen-ion acceptor.
C) Good hydrogen-ion donor.
D) Poor hydrogen-ion donor.
Answer:
A good hydrogen ion acceptor
1. Which group of elements does not get an electronegativity value
because they do not form compounds? *
Alkali Metals
Alkaline Earth Metals
Boron Group
Carbon Group
Nitrogen Group
Oxygen Group
Answer:
noble gases from what i learnt
Which of the following best describes the difference between a mixture and a pure substance? A. A mixture has different properties throughout; a pure substance has the same properties throughout. B. A mixture is made up of more than one type of atom; a pure substance is made up of only one type of atom. C. A mixture is made up of only one type of atom; a pure substance is made up of more than one type of atom. D. A mixture has the same properties throughout; a pure substance has the different properties throughout.
Answer:d
Explanation:
Answer:
A mixture has different properties throughout; a pure substance has the same properties throughout.
Explanation:
8. What is the [H+] of a solution with a pH of 4.78
Answer:
7.01 is the answer of the [H+] of a solution with a pH of 4.78
5.08 moles of an ideal gas are contained in a 3000-mL container at a temperature of 25 °C. What pressure does the gas exert, in mm Hg, on the container?
Answer:
eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeiiiiiieeeeeemmmmmmmmiemeeeeeiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiimiiiimmmmmmmmmmmmmmmmmmmiimmiimiiiiiiiimiiiiiimmii
Explanation:
If a chemical reaction occurs, the properties of substances before and after the substances interact must be
Answer:
different
Explanation:
A chemical reaction may be defined as the process or method by which a substance undergo a change in their structure chemically when reacting with some other substance and acquiring the property of both or sometimes forms a new substance. It leads to the chemical transformation of the chemical substance to some another substance.
The properties of the new substance formed is different form the parent substance before the reaction.
Thus, when chemical reaction occurs, the properties of the substances before the reaction and after the reaction takes place is different.
PLS PLS HELP FAST When a pure substance is heated from 35.0°C to 50.0°C, it absorbs 5,200 J of energy. (50 g) What is the specific heat of the substance? You must show your work for full credit.
Answer:
6.93 J/g C
Explanation:
5200=50 g (15 C)x
5200=750x
Also I just took the test
Which of these layers is found directly above the Earth's core?
Group of answer choices
Outer core
Mantle
Inner core
Crust
Answer: Mantle
Explanation:
there are 3 layers of the earth- core, mantle and crust. The layer found directly above the earth's core is the mantle.
Answer:
The answer depends on what you are taking about: the outer core or the inner core?
Answer: Mantle
Explanation:
If you find a picture of the Earth's layers, you can see that the inner core is the bottommost layer. However, if you combine the Inner Core and Outer Core, that could be determined as the Earth's core.
I would chose the Mantle because if the two cores are combined, the layer directly above them is the Mantle.
What is the mass of 8.98 x 10^24 particles of CaCl2?
Answer:
1656.12grams
Explanation:
To calculate the mass of a substance in a particle, we need to calculate the number of moles (n).
n = nA × 6.02 × 10^23
nA = 8.98 x 10^24 particles
number of moles = 8.98 x 10^24 ÷ 6.02 × 10^23
n = 8.98/6.02 × 10^ (24 - 23)
n = 1.492 × 10^1
n = 14.92moles of CaCl2
Molar Mass of CaCl2 where Ca = 40g/mol, Cl = 35.5g/mol
CaCl2 = 40 + 35.5(2)
= 40 + 71
= 111g/mol
Using mole = mass/molar mass
mass = molar mass × mole
mass = 111 × 14.92
mass = 1656.12grams.
What geologic process could have formed the channel on Mars?
Answer:
How can we decide which geologic process formed the channel on Mars? Students figure out: The channel on Mars was probably formed by water. The rover Curiosity found rocks near the channel that were made up of many smaller rocks.
Explanation:
Hope it helps! Correct me if I am wrong :>
Can you please mark me as brainlest?
Answer:Water
Explanation:
Water could have formed the channel on Mars because some of the rocks that scientists studied from the earth looks similar to the rocks on Mars.
How do scientists know a reaction in dynamic equilibrium hasn't just stopped?
Answer:
any reaction will be in dynamic equilibrium if it's reversible and the rates of the forward and reverse reactions are equal.
Explanation:
say that you prepare a solution that is saturated with an aqueous solution of NaCl
HELP ME PLEASE I NEED THE ANDEER NOW
what does this graph represent?
A. speed
B. velocity
C. acceleration
D. momentum?
Thermal energy would naturally flow between objects at which temperatures?
O A. from 5°C to -5°C
OB. from 15°C to 15°C
OC. from 35°C to 45°C
OD. from -15°C to 15°C
Answer:
i think the answer is letter C. From 35°c to 45°c
Explanation:
sorry if it is wrong
Would the primary consumers, secondary consumers, or tertiary consumers have more total mass?
Answer:
primary
Explanation:
1. A student predicted the reaction between hydrogen and oxygen gas would yield 125
mL of water. However, after measuring the water formed in the reaction, the
student determined that only 110mL of water was actually formed. What is the
percent yield of this reaction?
Answer:
88%
Explanation:
percent yield is the actual yield divided by the theoretical (predicted) yield, then multiplied by 100 to get a percentage.
110/125 = 0.88
0.88 x 100 = 88%
Complete the Replication and Transcription of the following DNA Sequence:
GGAGTTACAGTTAGTA
Replication (DNA to DNA):
Transcription (DNA to RNA):
Answer:
CCUCAAUGUCAAUCAU or you could try CCTCAACGTCAATCAT i could be wrong so sorry im not the best
Answer:
Replicated DNA: CCT-CAA-TGT-CAA-TCA-T
Transcription sequence (mRNA): CCU-CAA-UGU-CAA-UCA-U
Explanation:
There are two suspects in a shooting investigation. Bullets are recovered from the crime scene. Both suspects own guns, and these guns have been seized by the police. How will the investigators check to see if one of these guns fired the found bullets?
Answer:
They can check if one of the bullets is gone if the gun was fully loaded or they can see if there is any particles of gun powder on the gun. I may be wrong.
553.5 mL ?:cm^3
how do i get my answer? and what is the answer?
Answer:
553.5 cm3
Reason:
1 mL = 1 cm3
Can somebody give me some backup for this question?
Match the items to use the analogy of time to the vocabulary of chemistry.
Answer:
1 year- 1 mole
time in general- amount of matter
1 second- 1 atom/ particle
Answer:
1 Year => 1 Mole
Time in General => Amount of Matter
1 Second => 1 Atom/Particle
Explanation:
These pairs make the most sense.
Hope it helps!!!
1. Convert 1.5 moles to molecules 2. Convert 1.204x10^24 molecules to moles 3. Convert 1.5x10^20 molecules to moles 4.Convert 0.35 moles to molecules 5. Convert 15 moles H2O to atoms 6.Convert 0.75 moles CaSO4 to atoms
Answer:
Explanation:
1.5 moles to molecules
1 mole = 6.02 x 10²³ molecules
1.5 moles = 6.02 x 1.5 x 10²³ molecules
= 9.03 x 10²³ molecules
2 )
Convert 1.204x10²⁴ molecules to moles
6.02 x 10²³ molecules = 1 mole
1.204x10²⁴ molecules = 1.204x10²⁴ / 6.02 x 10²³ moles
= 2 moles
3 ) Convert 1.5x10^20 molecules to moles
6.02 x 10²³ molecules = 1 mole
1.5x10²⁰ molecules = 1.5x10²⁰ / 6.02 x 10²³ moles
= .25 x 10⁻³ moles
= 2.5 x 10⁻⁴ moles .
4 )
Convert 0.35 moles to molecules
1 moles = 6.02 x 10²³ molecules
.35 mole = 6.02 x .35 x 10²³ molecules
= 2.1 x 10²³ molecules.
5 )
Convert 15 moles H₂O to atoms
1 moles = 6.02 x 10²³ molecules
15 moles = 15 x 6.02 x 10²³ molecules
= 90.3 x 10²³ molecules of water
1 molecule of water has 3 atoms in total
90.3 x 10²³ molecules of water = 90.3 x 3 x 10²³ atoms
= 270.9 x 10²³ atoms .
6 )
0.75 moles CaSO₄ to atoms
1 moles = 6.02 x 10²³ molecules
.75 moles = .75 x 6.02 x 10²³ molecules of CaSO₄
= 4.515 x 10²³ molecules of CaSO₄
1 molecule of CaSO₄ = 6 atoms
4.515 x 10²³ molecules of CaSO₄ = 6 x 4.515 x 10²³ atoms
= 27.09 x 10²³ atoms .
SOMEONE SMART HELP PLS!!
HELPPPPPPPPPPPPPP
If 300 rats are each given an LD50 dose of 3 000mg, what do you expect to happen
Answer:
LD50 is the amount of a material, given all at once, which causes the death of 50% ... LD100 Lethal dose for 100% of the animal test population ... Researchers can do the test with any animal species but they use rats or mice ... quoted as parts per million (ppm) or milligrams per cubic metre
Explanation: hope this helps :)
how many grams will be produced??
Explanation:
b is correct. 30.6 g H2O is produced.
If the volume is 500 mL, the mass of air is 60g (molar mass of air= 29g/mol), and the temperature is 0 C, what is the pressure inside the bottle?
Answer:
The pressure inside the bottle is 92.678 atm.
Explanation:
An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of the gases:
P * V = n * R * T
In this case:
P= ?V= 500 mL= 0.500 Ln= 60 g* [tex]\frac{1 mole}{29 g}[/tex] = 2.07 molesR= 0.082 [tex]\frac{atm*L}{mol*K}[/tex]T= 0 C= 273 KReplacing:
P* 0.500 L= 2.07 moles* 0.082 [tex]\frac{atm*L}{mol*K}[/tex] * 273 K
Solving:
[tex]P=\frac{2.07 moles* 0.082 \frac{atm*L}{mol*K} * 273 K}{0.500 L}[/tex]
P= 92.678 atm
The pressure inside the bottle is 92.678 atm.
How many atoms are there in 0.655 moles of C6H14?
Answer: 3.94 x 10^23 molecules
Explanation: hope this helps!
What type of reaction is the following:
2 Na + Cl2 -> 2 NaCl
decomposition
double replacement
single replacement
synthesis
Answer:
Synthesis :)
Explanation: