I actually do not know the answer can I help tommorow if you are fine with it tooo sleeeepy have 14 exams tommorow have to prepare.
Sorry:(
Why is it important for a community to have many different organism living together?
Answer:
Individual organisms live together in an ecosystem and depend on one another. In fact, they have many different types of interactions with each other, and many of these interactions are critical for their survival. ... One category of interactions describes the different ways organisms obtain their food and energy.
how many moles of hydrogen are in 4.70 moles of C12H22O11
Answer:
103.4 moles of hydrogen
Explanation:
Given data:
Moles of C₁₂H₂₂O₁₁ = 4.70 mol
Number of moles of hydrogen present = ?
Solution:
one mole of C₁₂H₂₂O₁₁ contain 22 moles of hydrogen. Thus in order to determine total number of moles in 4.70 moles of C₁₂H₂₂O₁₁ we will multiply the 22 moles of hydrogen with 4.70 moles of C₁₂H₂₂O₁₁.
1 mole of C₁₂H₂₂O₁₁ = 22 moles of Hydrogen
4.70 × 22 moles
103.4 moles of hydrogen
Which of the following notations is the correct noble gas configuration for Li
Noble gas configuration for Li : [He]2s¹
Further explanationIn an atom, there are levels of energy in the shell and sub-shell
This energy level is expressed in the form of electron configurations.
Lithium with atomic number 3, then the electron configuration:
1s²2s¹
And for noble gas configuration or it can be called Condensed electron configurations :
[He]2s¹
Answer:
[He]2s¹
Explanation:
How many positively charged nucleons are in an atom of ^50 24Cr?
Answer:
positively charged nucleons are 24
Explanation:
Given element:
₂₄⁵⁰ Cr
The superscript before the symbol of the atoms is mass number
The subscript before the symbol is the atomic number
Cr is the symbol of the atom
Now,
Atomic number is the number of protons in an atom.
The protons are the positively charged particles in an atom.
For this specie, the positively charged nucleons are 24
Jaime calculates the density of a slab of aluminum (Al) metal.
What information does Jaime need to evaluate the accuracy of his calculation?
the accepted value for the density of aluminum
the dimensions of the slab of aluminum that he used
a bar graph that shows the densities of different slabs of aluminum
a line graph that shows how the density of aluminum varies with temperature
Answer: the accepted value for the density of aluminum
Explanation:
took the test
Covalent bonds form through:
a. a combination of transfer of electrons and sharing electrons such that each atom attains an octet.
b. complete transfer of electrons to form cations and anions.
c. sharing of electrons such that each atom attains an octet.
d. sharing of electrons such that each atom attains a total of 10 ve.
Answer:
Sharing of electrons such that each atom attains an octet
Rank these elements from smallest to largest atomic radii: zinc, calcium, radium, and bromine.
Select one:
O a. calcium, radium, zinc, bromine
O b. calcium, zinc, bromine, radium
c. bromine, zinc, calcium, radium
d. bromine, zinc, radium, calcium
Answer:
The correct option is;
c. Bromine, zinc, calcium, radium
Explanation:
The atomic radii of the elements as arranged in the periodic table decreases across the period and increases down the groups
The location of each of the elements are;
Zinc: Period 4, Group 12
Calcium: Period 4, Group 2
Radium: Period 7, Group 2
Bromine: Period 4, Group 17
Therefore, the element with the largest atomic radius = Radium
The element with the smallest atomic radius = Bromine
Calcium comes before zinc on period 4, therefore, the atomic radius of calcium is larger than that of zinc
The rank of the elements from smallest to largest atomic radius is therefore;
Bromine, zinc, calcium, radium.
how many electrons in an atom with the electron configuration of 1s2 2s2 2p6 3s1
Taking into account the definition of electronic configuration and the Aufbau principle, in an atom with the electron configuration of 1s²2s²2p⁶3s¹, there are 11 electrons.
Electronic configurationThe electronic configuration of elements is the arrangement of all the electrons of an element in energy levels and sublevels (orbitals).
There are 7 energy levels, numbered from 1 to 7, and in which the electrons are distributed, logically, in order according to their energy level. Electrons with less energy will spin at level 1.
Each level is divided into sublevels. These sublevels into which each level is divided can be up to 4. These 4 sublevels are called: s, p, d, f.
In the s sublevel there can only be a maximum of 2 electrons, in p there can be a maximum of 6 electrons, in the d sublevel 10 electrons and finally in the f sublevel there can be a maximum of 14 electrons.
At level 1 there is only one sublevel, which will be the s. In level 2 there are 2 sublevels, the s and the p. At level 3 there are 3 sublevels s, p and d. And in level 4 there are 4 sublevels, the s, the p, the d and the f.
Aufbau's principleThe Aufbau principle is a principle of atomic physics, which explains how electrons arrange themselves in their orbits around the nucleus of the atom.
This principle states that the filling of these orbitals occurs in order of increasing energy, that is, from orbitals of lower energy to those of higher energy.
The simplest of the sublevels is 1. If you fill the 1s, you can start filling the 2s. Once the 2s sublevel is satisfied, the 2p can start filling, and so on.
Amount of electronsIn this case, in an atom with the electron configuration of 1s²2s²2p⁶3s¹, there are 2+2+6+1= 11 electrons.
Learn more about an electronic configuration of an atom:
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what is the half life?
HELP BRAINLIEST
Answer:
the time taken for the radioactivity of a specified isotope to fall to half its original value.
1 of 20
0 0%
In what form (solid, liquid or gas) is crude
oil found?
Enter your answer
Answer:
Gas
Explanation:
Because Crude oil can usually be found in the ground as a liquid and in the air is gas can be kerosene.
Someone please help will mark as brainliest
Answer: no you need a balance skall to make it the correct balance that you want. yes the hypothesis is correct because you change the balance with your balance scale so obviously it's going to make your hypothesis higher.
Explanation: I HOPE THAT HELPED.
This committee, known as the International Union of Chemistry (IUC), developed a specific set of rules for
chemists to follow. What were these rules called?
O
The nomenclature rules
O
The IUC rules
The Geneva rules
The Paris rules
Answer:
Nomenclature Rules
Explanation:
Answer: Its actually the geneva rules
Explanation:
a024
Object
Yepop (yp)
copper wire
132 yp
copper spoon 240 yp
glass jar
wooden spoon 240 yp
89 yp
1 point
8. A student believes she has measured a new property of matter that she
did not learn about in class. She calls her new property "Yepop". Above is a
table of Yepop measurements for different objects: Based on her results,
do you think "Yepop" is a property of matter?
A. No, because the copper objects have different measurements.
B. No, because the same substances have the same measurements.
C. Yes, because the spoons have the same measurements.
A precipitate is formed when the two solutions, barium nitrate, Ba(NO3)2, and phosphoric acid, H3PO4, are
mixed. Identify the correct products for this reaction.
A)
BaHa & NPO4
B)
BazN2 & HNO3
Baz(PO4)2 & NO2
D)
Baz(PO4)2 & HNO3
d. Ba₃(PO₄)₂(s)+6HNO₃(aq)
Further explanationDouble-Replacement reactions. Happens if there is an ion exchange between two ion compounds in the reactant to form two new ion compounds in the product
To predict whether this reaction can occur or not is one of them, the precipitation reaction. A precipitation reaction occurs if two ionic compounds which are dissolved reacted to produce one of the products of the ion compound does not dissolve. Formation of these precipitating compounds that cause reactions can occur
Because A precipitate is formed, then compounds of CO₃²⁻ and PO₄³⁻ except for Compounds of Li +, Na +, K +, Rb +, Cs +, and NH₄ + are generally included in the insoluble compound
So the reaction :
3Ba(NO₃)₂(aq)+2H₃PO₄(aq)⇒Ba₃(PO₄)₂(s)+6HNO₃(aq)
A precipitate is formed ⇒ Ba₃(PO₄)₂
What are the types of ions found in an ionic bond? (Check all that apply) * 2 points
cations
anions
prions
quarks
The right options is a cation and an anion !
When you add so much solute that no more dissolves you have a(n)
Answer:
When you add so much solute that no more dissolves you have a SATURATED SOLUTION.
Answer:
iIt is called as point of saturation or saturated solution
Water is clear and odorless. Is it chemical or physical change?
Answer:
Physical
Explanation:
Water is the only known substance on Earth that exists naturally in three states: solid, liquid, and gas. To change between these states, water must undergo physical changes.. Hydrogen and oxygen are gases at standard temperature and pressure, whereas water is a colorless, odorless liquid
Which of the following Best describes how a compound naturally occurs
Answer:for my ap3x test the answer was the molecular formula
Explanation:
Ap3x
Answer:
the molecular formula
a p e x
When two balls collide, the momentum of the balls after the collision is explained by?
Answer:
(m1+m2)v
Explanation:
where m1 is the mass of the first body
m2 is the mass of the second body
v is the velocity
What volume of oxygen will react with 50cm^3 of nitrogen monoxide?
Answer:
GIVE BRAINLIEST PLEASE!!! Answer - 50cm^3 of oxygen
Explanation:
They need (almost) equal amounts of substance to react
hope this helps <3
How many moles of oxygen are needed to burn 2.7 moles of methyl
alcohol (CH3OH)?
2CH2OH + 302 -→ 2CO2 + 4H2O
please show how you got it
Answer:
3.38 moles of O2.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
4CH2OH + 5O2 → 4CO2 + 6H2O
From the balanced equation above,
4 moles of CH2OH required 5 moles of O2 for complete combustion.
Finally, we shall determine the number of mole of O2 needed to react with 2.7 moles of CH2OH. This can be obtained as follow:
From the balanced equation above,
4 moles of CH2OH required 5 moles of O2 for complete combustion.
Therefore, 2.7 moles of CH2OH will require = (2.7 × 5)/4 = 3.38 moles of O2 for complete combustion.
Thus, 3.38 moles of O2 is required.
What are the trends for atomic size and ionization? Explain why for each trend. Tell me the direction- up or down a group and across a period for each trend. Use the lecture, the video at the end of the lecture, or the guide for periodic trends to respond to this prompt.
Answer:
See explanation
Explanation:
Atomic size increases down the group due to the addition of more shells.
As more shells are added and repulsion of inner electrons become more significant, atomic size increases down the group. However, across the period, atomic size decreases due to increase in effective nuclear charge without any increase in the number of shells. This causes increased attraction between the nucleus and the outermost shell thereby decreasing the size of the atom.
Ionization energy decreases down the group because the outermost electron is more shielded by inner electrons making it easier for this outermost electron to be lost. Across the period, ionization energy increases due to increase in effective nuclear charge which makes it more difficult to remove the outermost electron due to increased nuclear attraction.
A wooden block has a mass of 562 g and a volume of 72 cm3. What is the density rounded to the nearest tenth!
Answer:
The answer is 7.81 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question we have
[tex]density = \frac{562}{72} \\ = 7.80555555...[/tex]
We have the final answer as
7.81 g/cm³Hope this helps you
Answer:
r
Explanation:
how are compounds Similar to elements and how are they different
Answer:
A compound contains atoms of different elements chemically combined together in a fixed ratio. An element is a pure chemical substance made of same type of atom. Compounds contain different elements in a fixed ratio arranged in a defined manner through chemical bonds. They contain only one type of molecule.
Complete each of these
How many moles of tungsten atoms are in 4.8x10^23 atoms of tungsten?
A. 1.3 x 10^-1 moles
B. 8.0 x 10^2 moles
C. 1.3 x 10^-2 moles
D. 8.0 x 10^1 moles
Explanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\ [/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{4.8 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{4.8}{6.02} \\ = 0.797342192 \\ [/tex]
We have the final answer as
8.0 × 10-¹ molesHope this helps you
Answer: D. 8.0 x 10^-1 moles
Explanation:
why estuaries are an important habitat for many marine organisms in comparison to the open ocean?
Answer:
There are more nutrients available in estuaries. There are more nutrients available in estuaries.
Explanation:
Calculate the new volume if in a container there is a mass of gas that occupies a volume of 1.3L at a temperature of 280K. Calculate the volume when reaching a temperature of 303K.
Answer:
1.4 L
Explanation:
From the question given above, the following data were obtained:
Initial volume (V1) = 1.3 L
Initial temperature (T1) = 280 K
Final temperature (T2) = 303 K
Final volume (V2) =?
With the above data, we can obtain the new volume of the gas by using the Charles' law equation as shown below:
V1 /T1 = V2 /T2
1.3/280 = V2 /303
Cross multiply
280 × V2 = 1.3 × 303
280 × V2 = 393.9
Divide both side by 280
V2 = 393.9/280
V2 = 1.4 L
Thus, the new volume of the gas is 1.4 L
Is this tinder like my guy
When electricity is passed through a common salt solution. Sodium hydroxide is
produced along with the liberation of the two gases X and Y. X burns with pop
sound whereas Y is used for disinfecting drinking water.
a) Identify X and Y
b) Give the chemical equation for the reaction stated above
c) State the reaction of Y with dry slaked lime,
Answer:
a)oxygen and chlorine
b) H20+NaCl= NaOH + O+ Cl
c) Cl2+ Ca(OH)2=CaOCl2+CaCl2 +HCL
Explanation:
electricity splits up the molecules for water and hydrogen displaces chlorine because its is more reactive.
