Answer:
All of the elements in a period have the same number of atomic orbitals. For example, every element in the top row (the first period) has one orbital for its electrons. All of the elements in the second row (the second period) have two orbitals for their electrons.
Explanation:
What's the Matter?
Which statements correctly describe matter? Select all that apply.
A. Matter is made up of atoms.
B. Matter is a measure of the amount of material in an object.
C. Matter may exist as a solid, liquid, or gas.
D. Matter forms when particles chemically bond together.
E. Matter includes both elements and compounds.
Answer:
Matter is anything that takes up space and has mass. Mass is the stu that matter is made of, or the amount of particles in a substance or object. Matter has physical and chemical properties and can undergo physical and chemical changes
C. Matter may exist as a solid, liquid, or gas.
Explanation:
A car travels 76 km/hr for 11 hours. How far did the car travel in this time period (in kilometers)?
Answer:
836 km
Explanation:
76*11=836
Answer:
836km
Explanation:
76km/hr = 76×1000÷3600= 190/9 m/s
11hours =39600 s
Distance=speed×time
Distance=190/9 × 39600= 836,000m
So distance is 836,000m or 836 km.
This method is possible only if body is moving linearly and the velocity is constant.
If there is uniform acceleration use Newton's laws of motion.
If is acceleration is varying then use calculus methods.
which choice is an element? Air, oxygen, water, or sodium cholride
Answer:
Oxygen is an element.
Explanation:
Out of the choices listed, oxygen is the only element. The other choices are incorrect because air is a mixture of nitrogen, oxygen, carbon dioxide, water vapors, and some other gases; water is a compound of hydrogen and oxygen; and sodium chloride is a compound of sodium and chloride ions; meanwhile, oxygen is a pure element.
What is the balanced equation for the decomposition of calcium oxide?
An increase in which property would cause an electromagnetic wave's energy
to increase?
A. Wavelength
B. Mass
C. Frequency
D. Speed
SUBMIT
What is the empirical formula of a molecule containing 65.5% carbon, 5.5% hydrogen, and 29.0% oxygen
Write a 4-6 sentence paragraph using science vocabulary, full sentences, proper grammar, and details explaining the difference between plant cells and animal cells. Science...
Answer:
Plant cells and animal cells are both eukaryotic cells. They both have a nucleus, Golgi complex, endoplasmic reticulum, ribosomes, mitochondria, cytoskeleton and cell membrane. Only plants cells have a vacuole, cell wall and chloroplast, while animal cells have cilia, centrioles and lysosomes which plant cells don't usually have. Because of their cell walls plant cells are in rigid rectangular shapes while animal cells have looser round shapes. The main difference in their functions is that animals don't produce their own food while plan cells do.
Find the pOH for the following:
A 1.34 x 10^-4 M solution of hydrochloric acid.
A) 10.13
B) 3.87
C) 4
D) 10
Answer:
A) 10.13 is the answer
Explanation:
Since HCl is a strong acid, its pH can be found by simply plugging it into the equation:
pH = -log[H+]
*H+ is just the concentration you were given*
Now that you have the pH, you just subtract it from 14 to find the pOH
I have attatched my work below. Hope this helps! :^)
To find the pOH of a solution, you can use the formula: pOH = -log10[OH-]
What is pOH?pOH is a measure of the concentration of hydroxide ions (OH-) in a solution. It is the negative logarithm (base 10) of the hydroxide ion concentration.
In this case, since we have hydrochloric acid (HCl), we need to consider the concentration of hydroxide ions (OH-) produced when HCl dissociates in water.
HCl is a strong acid and completely dissociates, meaning it produces an equal concentration of hydrogen ions (H+) and chloride ions (Cl-) in water. Since there are no hydroxide ions produced, the concentration of hydroxide ions is 0.
Therefore, the pOH of a hydrochloric acid solution is 0, and none of the options provided (A, B, C, D) is the correct answer.
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what happens when phosphorus forms an ion?
Answer:
Phosphorus would form a -3 charge
Explanation:
Phosphorus has five outer electrons that can bind atoms. As a result, Phosphorus forms a ion has a charge of -3.
(Total for Question 3-5 marks)
Q4. Carbon monoxide and hydrogen are used in the manufacture of methanol (CH3OH)
The reaction is reversible and can reach a position of dynamic equilibrium.
CO(g) + 2H, (g) = CH OHg) AH = -91 kJ/mol
The reaction is carried out at a pressure of about 100 atmospheres and a temperature of 250°C.
(a) State two features of a reaction that is in dynamic equilibrium.
1
2
Page 9 of 11
Answer:
1. Forward and Backward reaction rate are equal
2. Concentration of reactants and products are the same.
what is the maximum wavelength of light that can ionize hydrogen in its ground state?
Answer: 123×10−7m.
Explanation:
An unknown substance was put in a container. The substance filled up the container from bottom up, taking half of the space in the container.
What is most likely the state of matter of the substance?
Gas
Liquid
Plasma
Solid
According to the forces of attraction, the most likely state of matter of the substance mentioned is liquid.
What is matter?
Matter in chemistry, is defined as any kind of substance that has mass and occupies space that means it has volume .Matter is composed up of atoms which may or not be of same type.
Atoms are further made up of sub atomic particles which are the protons ,neutrons and the electrons .The matter can exist in various states such as solids, liquids and gases depending on the conditions of temperature and pressure.
The states of matter are inter convertible into each other by changing the parameters of temperature and pressure.According to law of conservation of matter , matter can neither be created nor destroyed only its state changes .
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Answer:
liquid
Explanation: liquid conforms to the shape of the container which it is held in.
An atom has a charge of 1+. If the atom's nucleus contains 23 protons, the atom must have
A
25 electrons.
В.
23 electrons.
с.
22 electrons.
D.
24 electrons.
Howler and warnibers is answer
Answer:
22 electrons
Explanation:
correct answer correct answer correct answer
rutherford and JJ thompson both contributed to what we know about the structure of the atom. What experiments did they perform and how did it change what we know about the structure of the atom? Furthermore describe the structure of an atom using only two words
Answer:
J.J. Thomson's experiments with cathode-ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons. Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus. I would describe the structure of an atom as the plum pudding model.
how many valence electrons are there in an argon atom?
Answer:
There are 8 valence electrons in an argon atom.
Can anyone help meee
calculate the solubility product for the following solutions:
a) a saturated solution of cadmium sulfide, CdS (solubility = 1.46 • 10 ^ -11 mol / l
b) a saturated solution of calcium fluoride, CaF2, containing 0.0168g / l CaF2
Answer:
what is total amount of saturated solution
A metal ball has a mass of 6 kg and a volume of 42 cubic meters. What is its density
Answer:
0.143kg/m^3
Explanation:
density= mass / volume
Answer:
1/7 kg/cubic metres
Explanation:
Here, Density=mass /volume
=6/42
=1/7 kg/cubic metres.
Help me please! I’m
In my own breakout room doing this like the other kids NOW HELP!
Answer:
Sun
Explanation:
Answer:
earth
Explanation:
are diamonds and graphite made from the same element
Answer:
Graphite and diamond are two of the most interesting minerals. They are identical chemically – both are composed of carbon (C), but physically, they are very different. Minerals that have the same chemistry but different crystal structures are called polymorphs.
- Explain the relationship between electronic structure and the chemical
properties of an element.
Answer: There is a relationship between the electron configuration of an element and its resulting chemical/physical properties. Atoms of an element like to have a full octet of electrons in their valence shells. ... Other elements need to lose or gain electrons to obtain an octet.
:
the first organisms to convert solar energy into chemical energy were most likely
First organisms to convert solar energy to chemical energy were the organisms which are called as cyanobacteria.
What is chemical energy?
Energy which is stored in the chemical bonds of chemical compounds is called chemical energy.Chemical energy is released during the occurrence of chemical reaction.Reactions wherein energy is given out in the form of heat is called exothermic reactions.
Chemical energy can be converted to other forms of energy like electrical energy during the process of electrolysis and to thermal energy as in the case of thermal engines.
It can also be converted to kinetic energy during explosions . It is stored in batteries, coal, biomass, food, vehicle air bags,etc.During digestion chemical energy is converted to mechanical and thermal energy.
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3. What must you have when you pray?
Answer:
when you pray you will feel a peace and happiness in your heart
what is the molecular formula of linoleic acid?
Answer:
C18H32O2
Explanation:
This is it, i hope it helps Good luck.
during an earthquake, geologists use a machine called what
Answer:
sesimographs
Explanation:
Answer:
A seismometer
Explanation:
it measures seismic waves
What mass will 33.6 L of chlorine gas (Cl2) have at STP?
A.) 35 g
B.) 53 g
C.) 71 g
D.) 106 g
Are crystals of different soluble solids similar?
Crystals of different soluble solids are not similar because they are amorphous and therefore do not have definite crystals.
What are crystal solids?A crystalline solid is a homogeneous solid in which the constituent particles, atoms, ions or molecules are arranged in a definite repeating pattern.
Most of the solid substances are crystalline in nature. The arrangement of particles in a crystalline solid is such that the total intermolecular force of attraction is at maximum.
Factors in which solubility depends are temperature, pH, and ionic strength.
Crystals of different soluble solids are not similar as they do not have definite crystals.
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Which of the following shows a valid combustion reaction?
Answer:
May be third one because of the formation of H2(hydrogen)on the product side.
The equation that shows the valued combustion reaction is [tex]C_2H_4 + 3O_2 \rightarrow 2CO_2 + 2H_2O[/tex]
The following information should be considered:
For [tex]2Al + 2O_2 \rightarrow 2AlO + O_2[/tex] it should not Balanced Properly [tex]2Al + O_2 = 2AlO[/tex] For [tex]2CH_4 + O_2 \rightarrow 2CO + 4H_2[/tex] as CO should be [tex]CO_2[/tex] For [tex]Ca + O_2 \rightarrow CaOH[/tex] it should Not Balanced and No source for the H.Learn more: brainly.com/question/16911495
True or false? Simple molecular substances contain delocalised electrons.
Answer:false
Explanation:
All the organisms alive today arose from preexisting organisms.
O True
O False
Organisms often die with a little time. They make new oragnisms which then carry on their legacy.
as liquid or gases heat up, they ___________. Then as they___________ they fall, thus As liquid or gases heat up, they driving the motion the of convection.
A: Fall, Heat
B: Bubble, Overflow
C: Create Heat, Burn
D: Rise, Cool
Help please its okay if not <3
Answer:
so sorry but I need to randomly answer 2 questions