Answer:
A
Explanation:
Florine F and Bromine Br these two elements have same physical and chemical properties. Hence option A is correct.
What is Atom ?Atom is smallest entity of a body. Body is made up of atoms. it is basic building block of a body. An atom consist of electrons, protons and neutrons as sub atomic particle. whole mass of the atom is concentrated at the center of the atom which we call it as nucleus, nucleus consist of proton and neutron. Electron revolve around the nucleus at determined(fixed) orbit. Total number of protons in the atom decides the atomic number and the elements in the periodic table.
The electrons which are completely filled orbitals are called as core shell electrons and which are not filled completely are called as valence electron. valence electrons are responsible for physical and chemical properties of the element. Elements which are on same column in periodic table have same number of valence electrons . Hence they have same properties.
Chlorine, Florine and bromine comes in halogen group. it require only one electron to complete its Octet rule. chemical and physical properties are decided by the valence electron of the element. As Florine and Bromine has same valence electron as chlorine. their properties also likely to be same.
Hence option A is correct.
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According to VSEPR theory, what is the bond angle of CCl4?
a. 90
b. 109.5
c. 120
d. 180
The muscular system and the skeletal system work together so the body can do what?
move
pump blood
get oxygen
digest food
Answer:
Move
Explanation:
Balance equation Co2(CO3)3(s)=Co2O3(s)+CoO2(g)
Answer:
answer
Explanation:
explination
I need help on this question
Answer:
When a front passes over an area, it means a change in the weather. Many fronts cause weather events such as rain, thunderstorms, gusty winds, and tornadoes. At a cold front, there may be dramatic thunderstorms. At a warm front, there may be low stratus clouds. Usually, the skies clear once the front has passed.
Explanation:
Plz make me brainliest :)
Have a nice day
Answer:
Email your teacher they will give you the answers try it yourself
Explanation:
Which of the following reactions is NOT properly classified?
(A) Synthesis - MgO + CO2 → MgCO3
(8) Decomposition - 2 Fe(OH)3 → Fe2O3 + 3 H2O
(c) Combustion - CO2 + 2 H2O → CH4 + 2 02
(D) Synthesis – 2 Na + Cl2 → 2 NaCl
Help please!!!!!!!!!
Answer:
D. Element
Explanation:
Fe is an element. It isn't more than one element chemically combined (compound), it isn't a charged particle (ion), and it isn't the smallest possible unit of multiple atoms combined together (molecule).
HELP!! URGENT!! WILL GIVE BRAINIEST
Answer:
11. Mn (CH 3 CO 2) 2. (H 2 O) n where n = 0, 2, 4.
12. Au2O
Explanation:
Hope this helps
Substance P is carbon.
Suggest what substances Q and R could be. Give their names.
substance Q .......................................................................................
substance R .......................................................................................
Explanation:
substance Q could be oxygen (O2)
substance R could be carbon dioxide (CO2)
Substance Q could be oxygen ([tex]O_2[/tex])
Substance R could be carbon dioxide ([tex]CO_2[/tex])
What are molecules?The smallest particle of a substance that has all of the physical and chemical properties of that substance.
There are 2 oxygen atoms in 1 molecule of oxygen. It is a di-atomic gas.
Carbon dioxide is a chemical compound composed two oxygen atoms covalently bonded to one carbon atom.
Hence, substance Q could be oxygen ([tex]O_2[/tex]). substance R could be carbon dioxide ([tex]CO_2[/tex])
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NH3+
H2(SO4) =
(NH4)2(SO4)
Balance
Answer:
2 NH3 + H2SO4 = (NH4)2SO4
Explanation:
The reaction type is synthesis
How many molecules are in 6.25 grams of N2O5?
Answer:
0.0578647982046175
Explanation:
Nitrogen is an element. What is the smallest particle of nitrogen that has all the properties of nitrogen?
Answer:
The structure of the atom.
Explanation:
The correct answer is - The structure of the atom.
Reason -
An atom is the smallest unit of matter that retains all of the chemical properties of an element.
Which of the following describes an animal that is contributing to the cycling of water in the hydrologic cycle?
OA. A monkey is cooled as sweat evaporates from its skin.
ОВ. A sea anemone lives in a habitat of seawater.
OC. A fish swims upstream in a flowing river.
OD.
A butterfly hides under tall grass during precipitation.
HELPP!!
Answer:
OA.
Explanation:
hydrologic cycle invloves evaporation which the wonkey is doing and when t hat condenses it is turned into water which we drink. So if you think very hard about it every time you drink a glass of water, you could be drinking monkey sweat :)
3.) Plants make food through photosynthesis, and photosynthesis takes place mostly in plant in plant leave, but when plants lose their leaves in winter, they don’t die.
This is evidence that
A. Someone gives the plant food everyday.
B. Plants store food later use.
C. Plants can use heat in the ground to make food.
Answer:
B
Explanation:
Write the product for each synthesis reaction . Balance the chemical equation . a) Be+O 2 Li+Cl 2 c) Mg+N 2 d) Al+Br 2 K+O 2
Answer:
j,
Explanation:
what are cells
1. the smallest things that can carry out life processes
2. parts of a molecule
3. parts of an atom
1.the smallest things that can carry out life proccess
What causes the differences in physical characteristics like hair color among people?
ООО
different versions of genes
O variations in DNA length
different numbers of chromosomes
variations in cell nucleus size
Answer:
The answer is a
Explanation:
PLEASE ANSWER ALL QUESTIONS WILL MARK BRAINLY
1. Calculate the density for the following cube if it’s mass is 1.25 g and each side has a measurement of 3 cm.
2. Would the cube in question 1 float or sink in water? ( Calculate the density for the following cube if it’s mass is 1.25 g and each side has a measurement of 3 cm.)
3. If an irregular-shaped piece of gold is placed into a graduated cylinder and it displaces 15 ml of water, what is the volume of the object?
4.How many elements are in the particle with the chemical formula C2H7N3?
5.How many atoms are in the particle with the chemical formula C2H7N3
Answer:
1. 2.89
2. Will it float in fresh water? Yeah, sure it will!
3. 5g/ml
4. 3 because the letters represent the elements
5. 12
Explanation:
Birds' feet change slowly over time, depending on their habitat. Ptarmigans live in snowy areas and eat pine needles, twigs, and insects. Roadrunners live in deserts and plains and eat anything they can catch. Peregrine falcons live on high perches and use their talons for grasping their prey. Mallards live near water and swim and dive for food.
What is an inherited behavior or physical change that helps an organism survive and reproduce in its environment?
A. adaptation
B. variation
C. evolution
D. species
Answer:
A
Explanation:
hello, do you think you know the order of this?
Answer:
1. A
2. B
3. D
4. C
Explanation:
Just trust me. Good luck on your test! (I go to K12 as well.)
A student bends a paperclip rapidly back and forth. When he touches the point where he was
bending the paperclip, he finds that its temperature has increased. This indicates that the
atoms in that part of the paperclip have increased in what kind of energy
Answer:
conservation .
Explanation:
Waves are caused by blank and tides are caused by blank
Answer:
Waves are most commonly caused by wind. Wind-driven waves, or surface waves, are created by the friction between wind and surface water. As wind blows across the surface of the ocean or a lake, the continual disturbance creates a wave crest. ... The gravitational pull of the sun and moon on the earth also causes waves.
Gravity is one major force that creates tides. In 1687, Sir Isaac Newton explained that ocean tides result from the gravitational attraction of the sun and moon on the oceans of the earth (Sumich, J.L., 1996). ... Tidal forces are based on the gravitational attractive force.
If the Tides is working then out “ High and low tides are caused by the Moon. The Moon's gravitational pull generates something called the tidal force. The tidal force causes Earth—and its water—to bulge out on the side closest to the Moon and the side farthest from the Moon. These bulges of water are high tides“.
The element which has atomic number 17 is considered from... A. Metals B. Non-metals C. Noble gas D. No correct answer Please explain with your answer.
Answer:
B. Non-metals
Explanation:
The element with the atomic number of 17 is Cl.
Chlorine belongs to the group 7 in the periodic table. It is a non metal.
Correct option: B. Non-metals
How hot is magma?
27 points
Answer:
2200 degrees Fahrenheit
Explanation:
700°C to 1300C where's my points at
if you were to slowly add 0.3 M NaOH to 35 ml if 0.23M HCl how many ml of NaOH solution would be needed to reach the equivalence point??
M1V1 = M2V2
M1 = 0.23 M HCl
V1 = 35 mL
M2 = 0.3 M NaOH
V2 = ?
(0.23 M)(35 mL) = (0.3 M)V2 —> V2 = 27 mL NaOH
How many milliliters are in a 30 gallon drum?
Answer:
113562 milliliters are in a 30 gallon drum
Explanation:
because you have to convert gallons into milliliters
could you put my answer as the brainist!!!!!!!
This resource produces the most energy for the smallest amount of resources.
Which one of these is it?
Coal
Oil
Natural Gas
Biomass
Wind
Geothermal
Hydroelectric
Nuclear
Solar
Tidal
Answer:
wind
pollution free no use of resources
Wind resource produces the most energy for the smallest amount of resources. Hence option 5 is correct.
What are resources?Resources are defined as a type of physical substance, like land, air, or water, that people value and require. A resource can be classified as renewable or nonrenewable based on whether it can replace itself at the rate it is used up or whether it has a finite supply. When people cherish natural resources, they become resources themselves.
Renewable energy sources like sun and wind don't consume fuel and emit no greenhouse gases. They are much more efficient at converting energy into electricity, producing less waste and cost-saving results. With 83% of the world's electricity coming from renewable sources, hydroelectric energy is by far the most common.
Thus, wind resource produces the most energy for the smallest amount of resources. Hence option 5 is correct.
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1929 cm3 of gas is how many L of gas
Answer:
1.929 Liters of gas
Explanation:
what is the chemical name for Li2CO2
Answer:
Lithium Carbonite
Explanation:
Answer:
Lithium
Explanation:
What is the molar ratio between carbon dioxide to water?
2 C4H10 + 13 O2 = 8 CO2 + 10 H2O
Answer:
8:10
Explanation:
The coefficients of a balanced chemical equation give us the mole ratios. The coefficient of carbon dioxide here is 8 and water is 10.
Please help!!!
Which statement about the manufacture of aluminium by electrolysis is correct?
А Aluminium ions are oxidised to aluminium by gaining electrons.
B Aluminium is extracted from its ore hematite. .
с Molten cryolite is used to dissolve the aluminium oxide.
D Oxygen is formed at the negative electrode.
Molten cryolite is used to dissolve the aluminum oxide is correct.
What is electrolysis?
Electrolysis is a process used to split molecules by passing an electric current through a solution containing ions. It works because the ions in the solution are attracted to the opposite charge of the electrodes in the electrolysis cell. The ions travel towards the electrodes and are either removed from the solution (oxidation) or released into it (reduction). This process is used in a variety of industries, such as metals refining, wastewater treatment, and electroplating.
The process of extracting aluminum from its ore, usually bauxite, involves electrolysis. In this process, the ore is dissolved in molten cryolite and an electric current is passed through it, leading to the oxidation of aluminum ions at the anode and the reduction of oxygen at the cathode. The aluminum is then extracted as a molten metal.
Therefore, option C is the correct answer.
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