Answer:
plants
animals
Explanation:
From the given choices only plants and animals are biotic in nature. Biotic factors are factors that can be attributed to living organisms.
The other choices such as water, light and minerals are abiotic. They are do not originate from living organisms.
Both biotic and abiotic factors are present within the ecosystem. In fact, they influence the ecosystem to a very large extent.
Together, these factors shapes the ecosystem.
What happens to the charge if a nonmetal
takes two valence electrons?
Answer:
if a non-metal takes two valence electrons then it get negatively charged to form ion.
Answer:
The nonmetal will gain a negative charge of magnitude 2
Explanation:
X be the nonmetal
On gaining two electrons
X^2-
PLEASE HELP ASAP WILL GIVE Brainlist
Answer:
3 5 5 3
Explanation:
Not 100% sure on this question
Given the reaction below:
N2 (9)
+
(g) + N205 (9)
What is the oxidizing agent of the reaction?
The oxidizing agent of the reaction : O₂
Further explanationGiven
Reaction
N₂ + O₂ ⇒ N₂O₅
Required
The oxidizing agent
Solution
The balanced equation :
2N₂ + 5O₂ ⇒ 2N₂O₅
Oxidation is an increase in oxidation number, while reduction is a decrease in oxidation number.
In the redoxs reaction, it is also known :
The reducing agents : a substance that experience oxidation
The oxidizing agent : a substance that is reduced
2N₂ → 2N₂O₅ (oxidation of N)
0 to +5
5O₂ → 2N₂O₅ (reduction of O)
0 to -2
So N₂ reducing agent, O₂ an oxidizing agent.
i am so bad at chemistry please help if u know..!
Explanation:
try solving by using molecular formula.
you've asked this so many times
The radioisotope technetium-99 is often used as a radiotracer to detect disorders of the body. It has a half-life of 6.00 hours. If a patient received a 20.0 mg dose of this isotope during a medical procedure, how much would remain 24.0 hours after the dose was given?
Answer:
[tex]0.25\ \text{mg}[/tex]
Explanation:
[tex]t_{1/2}[/tex] = Half-life of technetium-99 = 6 hours
[tex]N_0[/tex] = Initial mass of sample = 20 mg
[tex]t[/tex] = Time elapsed = 24 hours
Amount of mass remaining is given by
[tex]N=N_0e^{-\dfrac{\ln 2}{t_{1/2}}t}\\\Rightarrow N=20e^{-\dfrac{\ln 2}{6}\times 24}\\\Rightarrow N=0.25\ \text{mg}[/tex]
The amount of the sample that would remain is [tex]0.25\ \text{mg}[/tex].
Describe the paper
chromatography in short.
Answer:
Paper chromatography, in analytical chemistry, technique for separating dissolved chemical substances by taking advantage of their different rates of migration across sheets of paper. It is an inexpensive but powerful analytical tool that requires very small quantities of material.
Explanation:
Hope it is helpful....
What happens to the energy when you heat the iron? Why is this happening?
Answer:
When iron is heated in air it reacts with oxygen to form the compound iron oxide. Iron is a solid and oxygen is a gas. 5 Draw diagrams to show how the atoms are arranged in iron, oxygen and iron oxide in the circles below their names. Use different colours for the iron atoms and the oxygen atoms.
Explanation:
1. Look up bromine on the periodic table. What is the most common isotope of bromine?
Answer:
The most common isotope is Bromine-79.
Explanation:
1. Electronegativities of the elements Be, Mg, Ca, and Sr follow a specific trend within their group. Based on this trend, the atoms of which element will have the least attraction for an electron?
A) Be.
B) Mg.
C) Ca.
D) Sr.
2. Which element has a larger atomic radius than sulfur?
A) Chlorine.
B) Cadmium.
C) Fluorine.
D) Oxygen.
3. Which ion was formed by providing the second ionization energy to remove an electron?
A) Ca2+.
B) N3–.
C) Fe3+.
D) S2–.
4. The most negative electron affinity is most likely associated with which type of atoms?
A) Large nonmetal atoms.
B) Small nonmetal atoms.
C) Large metal atoms.
D) Small metal atoms.
5. Selected properties of antimony (Sb) and iodine (I) are listed in the table below.
Element AtomRadius(pm) 1st IonEnergy(kJ/mol) ElectroAffinity(kJ/mol) Electronegative
Sb 145 ? –103 2.05
I 140 1008 –295 ?
Which predictions can most likely be made?
Sb has a lower ionization energy but a higher electronegativity than I.
Sb has a higher ionization energy but a lower electronegativity than I.
Sb has a lower ionization energy and a lower electronegativity than I.
Sb has a higher ionization energy and a higher electronegativity than I.
6. Which correctly summarizes the trend in electron affinity?
A) It tends to be very high for group 2.
B) It tends to be more negative across a period.
C) It tends to remain the same across periods.
D) It tends to be more negative down a group.
7. Which explains the change in ionization energy that occurs between removing the first and second electrons from an atom?
A) The ionization energy decreases because the ratio of the protons to electrons increases.
B) The ionization energy increases because the ratio of the protons to electrons increases.
C) The ionization energy decreases because the ratio of the protons to electrons decreases.
D) The ionization energy increases because the ratio of the protons to electrons decreases.
8. Which element would most likely have an electron affinity measuring closest to zero?
A) Na.
B) Al.
C) Rb.
D) Ar.
9. Electronegativities of the elements Na, Al, P, and Cl follow a specific trend across the period. Based on this trend, an electron will be most strongly attracted to
A) Na.
B) Al.
C) P.
D) Cl.
10. Which best describes ionization energy?
A) Energy needed to add an electron to a neutral atom in the gas phase.
B) Energy needed to add an electron to a neutral atom in the liquid phase.
C) Energy needed to remove an electron from an atom or ion in the gas phase.
D) Energy needed to remove an electron from an atom or ion in the liquid phase.
Answer:
1. D) Sr
2. B) Cadmium
3. A)Ca2+
4. B) Small nonmetal atoms
5. C) Sb has a lower ionization energy and a lower electronegativity than I.
6. B) It tends to be more negative across a period.
7. B) The ionization energy increases because the ratio of the protons to electrons increases.
8. D) Ar
9. D) Cl
10. A) Energy needed to add an electron to a neutral atom in the gas phase.
Explanation:
I usually explain things but there are too many things to go over so let me know if u need a further explanation!
If the arrows below indicate the path of a beam of light, which diagram shows an example of reflection?
Answer: bot sure
Explanation:
If a car traveling at 75 mph west, changes its direction to east, does its acceleration change?
yes or no (1pt)
and explain why you chose the answer
Answer:
No because it changes velocity, instead of accelerating
Explanation:
and yes, I am in K12 ツ
Answer:
no
Explanation:
it changes velocity, instead of accelerating
Identify the correct equilibrium constant expression for this equation:
2 upper N upper O (g) plus upper O subscript 2 (g) double-headed arrow 2 upper N upper O subscript 2 (g).
K subscript e q equals StartFraction StartBracket upper N upper O EndBracket superscript 2 StartBracket upper O subscript 2 EndBracket over StartBracket upper N upper O EndBracket superscript 2 EndFraction.
K subscript e q equals StartFraction StartBracket upper N upper O subscript 2 EndBracket superscript 2 over StartBracket upper N upper O EndBracket superscript 2 StartBracket upper O subscript 2 EndBracket EndFraction.
K subscript e q equals StartFraction StartBracket upper N upper O EndBracket over StartBracket upper N Upper O subscript 2 EndBracket StartBracket upper O subscript 2 EndBracket EndFraction.
Answer:
First Option: B)
Second Option: C)
The pictures below will show the answers. The first picture is the first option, and the second picture is the second option.
Answer:
Question 1 : B
Question 2: C
Explanation:
Hope this helps!
Edge 2022
WILL MARK BRAINLIEST
*please answer correctly*
I’ve been stuck on this question for a while so I’d appreciate it
Nucleus Nucleus Atom 1 Atorn 2 Nucleus Nucleus Atom 3 Atom 4 Which two atoms are of elements in the same group in the periodic table?
Explanation:
The atoms of elements on the same period on the periodic table typically have the same number of valence electrons.
They have the same electronic configuration.
Valence electrons are electrons in the outermost shell of an atom.
The number of electrons in an atom is a good indicator of elements that might potentially belong to the same group.
please help, will give brainliest
Answer:
Explanation:
chemical change is a change where mew substance is formed
How many moles are in 9.63 x 10^22 atoms of Ar?
Answer:
0.16 moles of Ar
Explanation:
One mole is equal to 6.022×10^23 atoms
9.63 x 10^22 atoms * 1 mol/6.022×10^23 atoms = 0.15991364995 moles
Areas near large bodies of water tend to have which type of climate
Answer:
mild
Explanation:
During the summer months, glaciers at the poles melt, delivering fresh water to the ocean. What does this do to salinity? (giving 17 points for this one)
Question 3 options:
lowers salinity
it does not change the salinity
raises salinity
Answer:
lowers salinity
Explanation: I did the quiz on k-12 hope this helps good luck
In an ecosystem with glaciers its melting lowers salinity of the ocean ,delivering fresh water to the ocean.
What is an ecosystem?Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
Learn more about ecosystem,here:
https://brainly.com/question/1673533
#SPJ6
What is the name of N2Br6?
Answer:
Dinitrogen hexabromine
PLS HELP!! it’s science how do waves travel through gas
By 'waves' do you mean sound waves? If so sound waves need to travel through things like solids, liquids and yup gases. When the waves travel they are vibrating the molecules in the matter. By doing this he molecules in solids are packed very tightly.
The amount of matter in a given amount of volume is referred to as
A. Weight
B. Mass
C. Density
D. Volume^2
Answer:
It would be Density because:
Density= mass/ volume
Density refers to the amount of matter or mass of a substance over a volume
A compound is known to contain 15% sulfur.
What mass of sulfur does this correspond to if there is a total of 200g of the compound containing sulfur?
Answer:
30g
Explanation:
According to this question, a sulfur-containing compound is said to contain 15 percent by mass of sulfur. This means that 15% of the total mass of the compound is the mass of sulfur in the compound.
The question further states that there is a total of 200g of the compound containing sulfur, this means that the mass of sulfur can be calculated this:
Mass of sulfur = 15% of 200g
15/100 × 200g
15 × 2
30g
Hence, there are 30g of sulfur in 200g of the sulfur containing compound.
what kinds of things could a magnet make another object or magnet do without touching it?
Answer:
Magnets can be used to make other magnets and things made of iron move without being touched. Something that has been electrically charged can make other things move without touching them.
Explanation:
(can someone help me with my question?)
Which statement best explains how the gases of the atmosphere affect the temperature of Earth?
A
The gases reflect all of the heat from the Sun, preventing it from reaching Earth's surface.
B
The gases absorb all of the heat from Earth's surface, preventing it from radiating into space.
С
The gases absorb some of the heat from the Sun, holding it to keep it warm near Earth's surface.
D
The gases reflect some of the heat from Earth's surface, holding it away from the surface in space.
Answer: The answer is c
Explanation:
The gases absorb some of the heat from the Sun, holding it to keep it warm near Earth's surface. Hence option C is correct.
What is atmosphere?Atmosphere is defined as a layer of gas that surrounds a planet and is kept there by the gravitational pull of the planetary body. The atmosphere of the earth shields its people by absorbing dangerous sun rays and preserving a constant temperature. It protects Earth from many space hazards and enables life there. As a result, it is crucial for regulating climate and a source of life on planet.
The majority of the infrared energy from the Sun is absorbed and re-emitted in all directions by greenhouse gas molecules and clouds, creating the greenhouse effect. This causes the lower atmosphere and the Earth's surface to warm.
Thus, the gases absorb some of the heat from the Sun, holding it to keep it warm near Earth's surface. Hence option C is correct.
To learn more about atmosphere, refer to the link below:
https://brainly.com/question/26767532
#SPJ2
In continuing to think about the rock cycle, we know the phases can take thousands, even millions of years to occur. Which stage in the cycle can happen in mere hours or days?
a. Lithification and Erosion
b. Heat and pressure
C. Compaction and weathering
d. Cooling & Crystallization
Answer:
d. Cooling & Crystallization
Explanation:
One of the stages of the rock cycle that can take place under mere hours or days is cooling and crystallization.
Cooling and crystallization of lava on the earth surface is a very rapid and fast process.
When magma from within the earth reaches the surface, it becomes lava. Due to the nature of the surface, it cools rapidly and very fast to form very fine grained igneous rocks.
I WILL GIVE YOU BRAINLY PLSS!!! :(
Budding is a form of ______________ reproduction in which a new ______________
develops from a bud or outgrowth due to _________ division. The new organism remains
attached as it grows, separating from the ___________________ only when it is mature.
3. Vegetative reproduction is a form of _____________ reproduction in ___________ .
It is a process by which new organisms are produced without _______________ or
_______________ . It can occur naturally or be induced by ______________________ .
Answer:
Budding is a type of asexual reproduction in which a new organism develops from an outgrowth or bud due to cell division at one particular site.
Explanation:
Answer:
Budding is a type of asexual reproduction in which a new organism develops from an outgrowth or bud due to cell division at one particular site.
Explanation:
Which of following is 3942.25 rounded to 3 significant figures?
Iwhich
of the following is an ionic compound?
a. HCl(aq)
b. KClaa
C. C103(g)
d. NCl3
Answer:
KCl is an Ionic compound
Explanation:
Which of the following IS NOT an ionic compound?
A) C2H5OH
B) KCI
C) Mg3N2
D) MnO2
To calculate acceleration you must know both the objects velocity and _______________ 1pt
Answer:
i think its speed
Explanation:
Answer:
Velocety and mass
Explanation: