The most abundant element in the earth core is oxygen the most essential and precious gas. Second most abundant element is silicon.
Elements are the basic things in the universe. Everything in the world is made of elements. Elements combines to form molecules, molecules then forms compounds and compounds makes the macrothings.
There are various kinds of elements such as metals, gases, metalloids. etc. These all elements shows their characteristic physical and chemicals behaviours. Based on their electronic properties all the elements are classified into various groups in periodic table.
Oxygen is the most abundant element in the earth core that we all are used to intake for respiration. Oxygen s 8th element in periodic table and it is in P-block.
Silicon is the second most abundant element in the earth core. Silicon is a metalloids in 14th group of p-block and it is 14th element in periodic table. It is used in many electronic devises.
To find more about silicon, refer the link below:
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Answer:
HNO3 ->NO3²- + H+
Concentration of H+ ions= 0.0032M
pH = - log[ H+]
= - log (0.0032)
= 2.49
pH + pOH = 14
pOH = 14 - pH
= 14 - 2.49
= 11.51
pH = 2.49 and pOH = 11.51
Hope this helps.
Figure 11 shows the results
time taken for amylase to produce glucose (s)
Test 4
120
125
110
115
Figure 11
() Calculate the rate of amylase enzyme activity for the 10% starch solution.
Answer:
Phenolphthalein is an indicator. It is pink in alkaline solutions and turns colourless as the pH decreases.
It can be used to measure the activity of the enzyme lipase on the breakdown of lipids.
Samples of milk containing phenolphthalein were incubated with lipase at different temperatures.
The time taken for the phenolphthalein to turn colourless was recorded and used to calculate the rate of enzyme activity.
Figure 10 shows these results.
Picture
(a) (i) Explain why phenolphthalein turns colourless when lipase breaks down the lipids in milk. (2)
(ii) Describe the effect of temperature on the activity of lipase, as shown in Figure 10. (2)
(iii) Explain why the activity of lipase changes above a temperature of 40°C. (2)
(b) A student investigated the time taken for amylase to breakdown a 10% starch solution into glucose at 37°C. The student repeated the investigation five times.
To calculate the rate of amylase enzyme activity for the 10% starch solution, divide the time taken for amylase to produce glucose by the total time elapsed. For each test, this rate can be expressed as the number of glucose molecules produced per unit of time.
The rate of amylase enzyme activity for the 10% starch solution can be calculated by determining the time taken for amylase to produce glucose. In this investigation, the time taken for amylase to break down the starch solution into glucose was recorded in seconds. To find the rate, divide the amount of glucose produced (in this case, the time taken) by the total time elapsed. For example, for Test 4, the time taken was 120 seconds. The rate of amylase enzyme activity can then be expressed as 1 glucose molecule produced per 120 seconds.
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Answer:
A branch of science
Explanation:
CHemistry is the investigation and studying substances and their reaction with other elements
Answer:
chemistry :-
A branch of science in which we. . study about chemical
in the chemistry we studied about. elements and compounds and their
composition and reaction
Answer:
The energy required to remove the the electrons from gaseous atom is called ionization energy.
Explanation:
Ionization energy:
The amount of energy required to remove the electron from gaseous atom is called ionization energy.
Trend of ionization energy in periodic table:
Along period:
The atomic size tend to decrease in same period of periodic table with increase of atomic number because the electrons are added with in the same shell. When the electron are added, at the same time protons are also added in the nucleus. The positive charge is going to increase and this charge is greater in effect than the charge of electrons. This effect lead to the greater nuclear attraction. The electrons are pull towards the nucleus and valance shell get closer to the nucleus. As a result of this greater nuclear attraction atomic radius decreases and ionization energy increases because it is very difficult to remove the electron from atom and more energy is required.
Along group:
Atomic size increases with increase of atomic number from top to bottom. The nuclear attraction on valance shell became weaker and thus it becomes easy to remove an electron from valance shell and this can be done with less amount of energy. That's why ionization energy decreases from top to bottom.
The energy required to remove an electron from an atom in the gaseous state is called the ionization energy.
Ionization energy, also known as ionization potential, refers to the minimum amount of energy required to remove an electron from an atom or ion in its gaseous state, resulting in the formation of a positively charged ion.
The ionization energy can vary depending on the specific electron being removed (valence electron or inner shell electron) and the atom or ion involved. Generally, it requires more energy to remove electrons from atoms with higher nuclear charges or tighter electron configurations.
Read moter on ionization energy. here brainly.com/question/30831422
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cold water with no salt
B.
warm water with no salt
C.
warm, salty water
D.
cold, salty water