Two students are working together on an experiment that measures the effect of different liquid fertilizers on the thickness of plants’ stems. Which is most likely to result in the greatest amount of error in their scientific experiment?

Answers

Answer 1

Answer: Since you don't have any choices presented for the question, I'll just proceed on discussing possible errors that would be made in this scientific experiment.

The errors could root from:
-measurement of the thickness incosistently (at different times of the day)
-the instrument used is different in each measurement
-no regard of significant figures
-standard deviation from the mean is not calculated and not propagated

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Order the density of the layers of the Earth from lowest density to highest= inner core
= outer core
= asthenosphere
= oceanic crust
= continental crust

Answers

The layers of the Earth, from lowest to highest density, are the Continental crust, Oceanic crust, Asthenosphere, Outer core, and Inner core.

The layers of the Earth can be ordered by density from lowest to highest as follows: Continental crust, Oceanic crust, Asthenosphere, Outer core, and Inner core.

The Continental crust being the top-most layer, has the lowest density, ranging between 2.2 to 2.9 g/cm³. Below that, the Oceanic crust has a slightly greater density at about 3.0 g/cm³.

Below these crust layers is the Asthenosphere, part of the upper mantle, with a density ranging between 3.2 and 3.3 g/cm³.

The denser Outer core lies beneath with a density ranging from 9.9 to 12.2 g/cm³. At the core of the Earth, the inner core has the highest density, ranging from 12.6 to 13.0 g/cm³.

For more such questions on density, click on:

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Answer:

the first is the inner core second is outer core third oceanic cruat fourth contenental crust fifth asthenosphere

How is the charge of an atom determined?
how is the amount of neutrons determined?

Answers

Atoms have positively charged protons and negatively charged electrons, the number of each tells you the charge.
The ionic charge is the number of protons subtracted by the number of electrons. They usually have the same charge, but with opposite signs, Electrons ( -) and protons ( +)
To find the neutron number,subtract the proton number from the atomic mass. It will give you the neutron number.
Hope this helps.

Compared with saturated hydrocarbons, an unsaturated carbon has _____ ratio of hydrogen atoms to carbon atoms.

Answers

carbon has lower ratio of hydrogen atoms to carbon atoms

37 Which general trends in first ionization energy and electronegativity values are demonstrated by Group 15 elements as they are considered in order from top to bottom?(1) The first ionization energy decreases and the electronegativity decreases.(2) The first ionization energy increases and the electronegativity increases.
(3) The first ionization energy decreases and the electronegativity increases.
(4) The first ionization energy increases and the electronegativity decreases.

Answers

Correct answer: The first ionization energy decreases and the electronegativity decreases.

Reason:
As we move from top to bottom in a periodic table, atomic radius increases. Also, effective nuclear charge decreases. Due to this, energy required to remove the electron form valance shell decreases. Hence, ionization energy decreases from top to bottom.

In addition to this, metallic character increases from top to bottom. Metals have low electronegativity as compared to non-metals. Hence, electronegativilty value decreases from top to bottom.

The correct statement regarding the first ionization energy and electronegativity values in group 15 is as follows:

$\boxed{\left( 1 \right){\text{ The first ionization energy decreases and the electronegativity decreases}}}$

Further Explanation:

The amount of energy needed for the removal of the most loosely bound electron from a neutral isolated gaseous atom is termed as ionization energy, represented by IE. It depends on the ease of electron removal from the neutral atoms. If the electrons are removed easily, ionization energy will be less and vice-versa.

Ionization energy is called the first ionization energy when the first electron is removed from the atom. It is shown by $\left( {{\text{I}}{{\text{E}}_{\text{1}}}} \right)$ . Similarly, if the second electron is removed, ionization energy becomes the second ionization energy $\left( {{\text{I}}{{\text{E}}_{\text{2}}}} \right)$ .

The tendency of any element for electron attraction towards itself in a chemical bond is known as electronegativity. More the attracting tendency of the atom for electron, higher will be its electronegativity and vice-versa.

Atomic number and number of shells increase while going down group 15. Due to this, atomic size increases in the group from top to bottom. This increase in size results in weaker attractions between the outermost electrons and the atomic nucleus. So electrons are removed easily and therefore the first ionization energy decreases down this group.

Since atomic size increases from top to bottom of group 15, the attraction between the atomic nucleus and the electrons decreases. Therefore electronegativity also decreases down this group.

Therefore both the first ionization energy and electronegativity decrease down group 15.

Learn more:

Rank the elements according to first ionization energy: brainly.com/question/1550767
Arrange the following elements from greatest to least tendency to accept an electron: brainly.com/question/2107660

Answer details:

Grade: Senior School

Chapter: Periodic classification of elements

Subject: Chemistry

Keywords: ionization energy, first ionization energy, electronegativity, attraction, group 15, decrease.

Which of the following is not one of the three largest sources of materials needed to form carbon compounds?natural gas
petroleum
coal
wood

Answers

Answer:

The correct answer is option D, wood

Explanation:

The three major source of carbon on earth are – coal , petroleum and natural gas

Several carbon based products are formed from these three source after processing. For example – coke and charcoal are produced from coal, like wise ink and paints also have coal as one of the constituents substance. Carbon black is also extracted from coal. Similarly, from petroleum all lubricating oils and wax are derived using distill filtration.

WOOD is not one of the three largest sources of materials needed to form carbon compounds. So the answer is wood.

Hope this helps :)

What is represented by the dots in a Lewis electron-dot diagram ofan atom of an element in Period 2 of the Periodic Table?(1) the number of neutrons in the atom(2) the number of protons in the atom(3) the number of valence electrons in the atom(4) the total number of electrons in the atom

Answers

The number of Valence electrons are shown so that one can clearly see the electron transfer or sharing that may take place between the atoms.

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