Answer:
The correct answer will be option-It is the best explanation because it supports the beliefs and opinions of most scientists.
Explanation:
Albert Einstein is known for his theory of relativity which states that energy is a converted form of mass to the square of the speed of light which is constant.
Albert Einstein was a theoretical physicist who used the facts and data from the papers of the previous physicist. Although he used the facts his theory became one of the important theory in the physics world as it explained the path of the light and the form in which it travels.
This theory is well accepted today as it was supported by the experiments and observation of the other works of different scientist. This led to the acceptance of the theory worldwide.
Thus, the selected option is the correct answer.
c. Mg, magnesium
b. Al, aluminum
d. Cl, chlorine
Explanation:
Most of the carbon compound are convalent in nature and all of the electrons participates in bond formation as such there is no free electrons left to conduct electricity. Moreover carbon compound doesn't readily dissociates to form ions, which conduct electricity. Hence carbon compound are poor conductor of electricity.
Answer:
It is because all the valence electrons are used to form covalent bonds. So, there will be no electrons left to flow the electric current through them.
Explanation:
hope it helps
Answer:
the beat way i use is to have someone quiz you on what your studying for, and anything you het wrong you work on more.
two atoms have the same number of electrons
an atom’s outer energy level is filled to capacity
an atom’s outer energy level doesn’t have the maximum number of electrons
Answer:
The answer to your question is the last option
Explanation:
an atom’s nucleus has the same number of protons as it does neutrons to have the same number of protons and neutrons does not affect the ability of an atom to form bonds, so this option is wrong.
two atoms have the same number of electrons some atoms have that have the same number of electrons can form bonds, but most of the atoms that form bonds do not have the same number of electrons. This option is wrong.
an atom’s outer energy level is filled to capacity this option is wrong because noble gases have the outermost energy level filled to capacity and are unreactive.
an atom’s outer energy level doesn’t have the maximum number of electrons an atom with the characteristics described are reactive, so this is the correct answer.
(2) double covalent bond that has 4 shared electrons
(3) triple covalent bond that has 6 shared electrons
(4) triple covalent bond that has 4 shared electrons
Answer: Option (2) is the correct answer.
Explanation:
An alkene is a molecule that contains a hydrocarbon chain with atleast one double bond.
For example, is a 1-butene molecule and it contains one double bond that consists of four shared electrons.
On the other hand, a molecule of hydrocabon that contains a triple bond is known as an alkyne. Whereas a hydrocarbon that contains only single bonds is known as an alkane.
Thus, we can conclude that the multiple covalent bond in a molecule of 1-butene is a double covalent bond that has 4 shared electrons.
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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