Explanation:
Matter is defined as the substance that has mass and occupies space.
This means every matter will have mass and every matter will also have volume as it occupies space.
Every matter is made up of number of atoms as these atoms are the small sub-units that combine together and constitute a matter.
Hence, the statement atoms and compounds are made out of matter is not true.
As density is mass present in per unit volume. Therefore, every matter will vary in density.
Thus, we can conclude that characteristics that define matter are as follows.
Answer:
The answer to your question is: a, b and c
Explanation:
A.) Matter has mass. this option is correct, matter is formed by mass.
B.)Matter has volume (takes up space). this option is correct, matter takes up space.
C.)Atoms and compounds are made out of matter. This option is correct, all atomsand compounds are made out of matter.
D.) All matter has the same density. This optio is wrong, matter of different elements or compounds have different density.
b)hydrogen and chlorine
c)nitrogen and oxygen
d)sulfur and oxygen
Ionic compounds are formed between a metal and non-metal. An ionic compound can be formed between strontium and chlorine and the compound is called strontium chloride.
Ionic compounds are formed by losing an electron from an electropositive element to an electronegative element. Thus between a metal and non-metal.
Ionic bonds are the strongest bond and it creates partial charges in the compound since the bonded electrons are attractively pulled towards the more electronegative element in the bond and thus the metal ions gets a positive charge and nonmetal gets a negative charge.
Covalent bonds are formed by sharing electrons between two nonmetals. Hydrogen and chlorine forms the covalent compound HCl. Similarly, nitrogen and oxygen always forms covalent bonds.
Sulfur and oxygen are comparable in electronegativities and thus forms a covalent bond. Therefore, the elements which forms an ionic compound are strontium and chlorine forming strontium chloride. Hence, option A is correct.
To find more about ionic compounds, refer the link below:
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Answer:
strontium and chlorine
Explanation:
down?
A. Decrease in temperature - Ice melts and cools water - Cool.
dense water floats
O
B. Increase in temperature - Ice melts and cools water - Cool,
dense water sinks
O
C. Increase in temperature - Ice melts and freshens water -
Freshwater floats over denser salty water
O
D. Decrease in temperature - Ice melts and freshens water -
Freshwater floats over denser salty water
Answer:
Option A. Dense water floats.
Explanation:
Ocean circulation act as conveyor belt which transport warm water from the tropics towards poles from where cold water sinks to the deep ocean. It is also known as the thermohaline circulation because it is driven by salinity and temperature.
However, change in climate causing these ocean's thermohaline current to slow down because influx of cold and melting fresh water from the polar region is disrupting these circulation as influx of fresh water making the water less saline and less dense and hence it become harder to sink to deep ocean.
Answer:
C. Increase in temperature - Ice melts and freshens water - Freshwater floats over denser salty water
a. Reduction
b. Decomposition
Oxidation
d. Acid-Base Netralization
Answer:
The correct answer is reduction.
Explanation:
Nitrogen gas reacts with hydrogen gas and get reduced to form ammonia. In this reaction.This is important reaction of atmospheric nitrogen fixation.The reaction is carried out by many nitrogen fixing bacteria such as Azotobacter,Clostridium etc.
N2+3H2+6e- = 2NH3
The reaction N2 + 6e → 2N-3 represents reduction, where nitrogen gains electrons to form N-3 ions.
The reaction N2 + 6e → 2N-3 represents reduction. In this reaction, nitrogen (N2) gains electrons (e) to form N-3 ions. Reduction is a process in which an atom or ion gains electrons, resulting in a decrease in its oxidation state.
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Answer:
Explanation:
The chemical test for water includes the cobalt chloride paper test. If water is present it will change from blue to pink colour. Another test is the copper sulphate test. pure form of copper sulphate is white in colour.
Copper (II) sulphate is used to test for water. We use white anhydrous copper (II) sulphate, which contains no water. If water is present, the copper (II) sulphate turns blue. A positive test for the presence of water will mean the copper (II) sulphate turns blue.
Answer:
Virtual images.
Hope this helps.