Answer:
equilateral (B)
Explanation:
it is the only word which relates to triangles and their shape - plus, its logical and makes sense.
Answer:
its b
Explanation:
What are two ways nitrogen fixation occurs
Explanation:
natural process
biological fixation
An object has a mass of 35.00 grams. On Luixandras balance it weighs 33.95 grams. What is the percent error in this balance?
Answer:
The answer is 3 %Explanation:
The percentage error of a certain measurement can be found by using the formula
[tex]P(\%) = \frac{error}{actual \: \: number} \times 100\% \\ [/tex]
From the question
actual mass = 35 g
error = 35 - 33.95 = 1.05
We have
[tex]p(\%) = \frac{1.05}{35} \times 100 \\ [/tex]
We have the final answer as
3 %Hope this helps you
The closeness of particles of gas and their low speeds allow intermolecular forces to become important at certain
pressures and temperatures. Which best describes this statement?
Answer:
This is a limitation of the kinetic-molecular theory.
Explanation:
Question 2
1 pts
Which compound would you predict to be most soluble in water and why: NH,Br or NHACI?
Assume Br is larger than CI.
O NH Br because the distance between the lons is shorter
O NH Br because the distance between the lons is longer
These are equally soluble because their lons have the same charge
O NH CI because the distance between the lons is longer
O NHACI because the distance between the lons is shorter
liqued in which a substance dissolve
Answer: Water as its the universal solvent
Which of the following items would improve the experiment? Add more types of plants Test one plant with no fertilizer Use different soils for each plant Expose all six plants to green light
Answer:
Um, I'd say add more types of plants cause different plants react differently to things, I guess?
3. Where are gastropods found? Choose all the correct answers.
A) on land
OB) in salt water
OC) in fresh water
OD) all of the above
O E Maastropods are extinct
Save
Answer:
OD
Explanation:
they live in every habitat on Earth. Marine habitats, ocean basins, freshwater habitats, and inland equatic habitats including salt lakes.
the valency of nitrogen is 3 why
Answer:
The nitrogen atom has 5 electrons in the outermost shell, so it can accept 3 electrons to fulfil the octet structure. Therefore the valency of nitrogen is 3.
Which statement best explains why gases are poor conductors of thermal energy?
Answer:
Thermal Insulators
That's because air, like other gases, is a poor conductor of thermal energy. The particles of gases are relatively far apart, so they don't bump into each other or into other things as often as the more closely spaced particles of liquids or solids
Explanation:
Whose measurements are more precise?20.3 cm and 21.0cm
Answer:
will i think the 21.0cm
Here is a more complex redox reaction involving the permanganate ion in acidic solution
In the redox reaction involving the permanganate ion in acidic solution, permanganate ion is reduced to manganese (ii) ion while iron (ii) ion is oxidized to iron(iii) ion.
What is a redox reaction?A redox reaction is a reaction in which reduction and oxidation occurs at the same time and to the same extent.
An example of a redox reaction is the reaction involving the permanganate ion and tetraoxosulphate (vi) ion in acidic solution.
The equation of the reaction is given below:
[tex]MnO_{4}^{ - } (aq) + 5Fe^{2+}(aq) + 8H^{+} \rightarrow Mn^{2+}(aq)+ 5Fe^{3+}(aq) +4H_{2}O(l) \\ [/tex]
Therefore, in the redox reaction involving the permanganate ion in acidic solution, permanganate ion is reduced to manganese (ii) ion while iron (ii) ion is oxidized to iron(iii) ion.
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Do you agree in the Big Bang theory? Reasoning
do it if u trust urself
Which statement provides the complete explanation of how renewable and nonrenewable resources differ?
They differ in the amount they are found in nature.
They differ in the rate they are replaced.
They differ in the available amount and rate they are used and replaced.
They differ in the rate they are used.
Answer:
They differ in the available amount and rate they are used and replaced.
Explanation:
If one material is replaceable, then it's renewable. If it's not replaceable, then it's non-renewable.
The statement 'they differ in the available amount and rate they are used/replaced' provides an explanation of how renewable and nonrenewable resources differ.
What are renewable resources?Renewable resources can be defined can natural resources that can be renowned in nature in a given period of time.
These renewable resources include biomass and different types of energies (geothermal, wind, solar, etc). Conversely, non-renewable resources are specific resources from nature that cannot be replaced (e.g., coal).In conclusion, the statement 'they differ in the available amount and rate they are used/replaced' provides an explanation of how renewable and nonrenewable resources differ.
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do people cause melting glaciers
Answer:
Human activities are at the root of this phenomenon.
Explanation:
Was the periodic table of elements created at once by one scientist yes or no
Answer:
Yes
Explanation:
It was Dmitri Mendeleev, a Russian chemist and teacher.
Answer:
No, it wasn't. On Feb.17 in 1869, a very intelligent Russian professor of chemistry, Dimitri Ivanovich Mendeleev created his first part of the periodic table. I hope that helps you.
Explanation:
What functional group is present in the following compound?
Determine the number of liters in a 355 milliliter can of soda.
Ans: 0.355 L
Calculate the energy of a wave given a frequency of
9.43 x 1011 Hz.
Answer:
The answer is
[tex]4.92 \times {10}^{ - 22} \: J[/tex]
Explanation:
In order to find the energy of the wave we use the formula
e = hfwhere
e is the energy
f is the frequency
h is the Planck's constant which is
6.626 × 10-³⁴ Js
From the question
f = 9.43 × 10¹¹ Hz
We have
[tex]e = 9.43 \times {10}^{11} \times 6.626 \times {10}^{ - 34} \\ [/tex]
We have the final answer as
[tex]4.92 \times {10}^{ - 22} \:J[/tex]
Hope this helps you
Which of the following describes a chemical change?
A. a suspension of corn starch and water
B. formation of a precipitate
C. formation of a solution
D. filtration of a solid from a liquid
Answer:
C
Explanation:
Have a nice day
what makes an element reactive
Answer:
The number of electrons in the outermost shell of an atom determines its reactivity.
Explanation:
Answer:
The number of electrons in the outermost shell of an atom determines its reactivity. Noble gases have low reactivity because they have full electron shells. Halogens are highly reactive because they readily gain an electron to fill their outermost shell.
Explanation:
3. Describe the trends in atomic size, ionization energy, and electronegativity from left to right across a period in
the periodic table.
Answer:
Atomic size increase with increasing atomic number within a group.
Atomic size decrease with increasing atomic number across a period.
The statement, that describe the trends in atomic size, ionization energy, and electronegativity is "that atomic size decreases, ionization energy and electronegativity increases."
What is atomic size?Atomic size seems to be the space between an atom's nucleus and its outermost shell.
What is ionization energy?The energy necessary to remove the highest-energy electron from a neutral atom is known as ionization energy (IE).
What is electronegativity?Electronegativity is a chemical property that describes an atom's or functional group's inclination to draw electrons toward itself. Across a period of elements, atomic size falls steadily from left to right. This is because all electrons within a period or family of elements are added to the same shell. Ionization energy generally increases across a period and declines down a group.
Electronegativity normally increases as you move from left to right across a period and decreases as you move down a group on the periodic table.
Hence the correct answer is atomic size decreases, ionization energy and electronegativity increases.
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What makes metals, in particular, good conductors of electricity?
A.
the ability of electrons to flow throughout the metal
OB.
the absence of charged particles
O c.
the high temperatures required to break metallic bonds
D.
the presence of positive and negative ions
Answer: I believe the answer is A
) If 1 vitamin C tablet weighs 475 mg how much vitamin C is in that 1 tablet based on your
calculations?
Answer:
Amount = 0.0027 mol
Explanation:
The molecular formula of vitamin C is: C₆H₈O₆. Therefore, its molar mass will be:
Molar Mass = 6(Mass of carbon) + 8(Mass of Hydrogen) + 6 (Mass of Oxygen)
Molar Mass = 6(12 g/mol) + 8(1 g/mol) + 6(16 g/mol)
Molar Mass = 176 g/mol
Molar Mass = 176000 mg/mol
Now, for the amount of Vitamin C in 1 tablet
Amount = Mass of Tablet/Molar Mass
Amount = (475 mg)/(176000 mg/mol)
Amount = 0.0027 mol
are
Why the elements of d-block elements
called transition element?
Answer:
O nome "transição" vem da posição dos elementos na tabela, representando a transição do grupo 2 ao 13, pela sucessiva adição de elétrons ao orbital d. Elementos de transição externa (ou somente elementos de transição):
What is cheese made of is it like a piece of moon ?!
Answer:
It's made from dairy.
Explanation:
which surface events are examples of weathering
Answer:Weathering Erosion & Deposition
Changes in shape, size, and texture of land-forms (i.e. mountains, riverbeds, and beaches)
Landslides.
Buildings, statues, and roads wearing away.
Soil formation.
Washes soil, pollutants, harmful sediments into waterways.
Causes metals to rust.
Reduces beaches, shorelines.
Delta formation.
Explanation:
If the heat of fusion for water is 334 j/g, how many Jules are needed to melt 45.0 g of ice at 0.0°c?
Given parameters:
Heat of fusion of water = 334j/g
Mass of ice = 45g
Temperature of ice = 0.0°c
Unknown:
Amount of heat needed to melt = ?
Solution:
This is simply a phase change and a latent heat is required in this process.
To solve this problem; use the mathematical expression below;
H = mL
where m is the mass
L is the heat of fusion of water;
H = 45 x 334 = 15030J
1. 500 grams of sugar occupies a volume of 315 ml. What is the density of the sugar in g/mL? Show
your work.
Answer:
The answer is 1.59 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass = 500 g
volume = 315 mL
We have
[tex]density = \frac{500}{315} = \frac{100}{63} \\ = 1.587301...[/tex]
We have the final answer as
1.59 g/mLHope this helps you
Define energy transformation.
Answer:
Enery transformation is when a forn of energy changes into another.
Explanation:
An example of this would be a lamp. The lamp gets its energy through electricity. This electricity is later turned into light energy. Electrical energy to light evegy.
Calculate the density of the following material: 500 kg gold with a volume of 0.026 m³.
Answer:
The answer is 19230.8 kg/m³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass = 500 kg
volume = 0.026 m³
We have
[tex]density = \frac{500}{0.026} \\ = 19230.769230...[/tex]
We have the final answer as
19230.8 kg/m³Hope this helps you
