The model of the solar system by the student would contain an error if he did not use different ball sizes which are in proportion to the size of each planet.
What is the solar system?The solar system is the system of the Sun and it's nine planets.
The Sun is the main star and source of energy in the solar system.
The planets in the solar system are of different sizes and orbit at various distances around the Sun.
This a student modelling the solar system should use different ball sizes in proportion to the size of each planet.
Therefore, the model of the student would contain an error if he did not use different ball sizes which are in proportion to the size of each planet.
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4 NO(g) + 2 O2(g) = 2 N20468)
Answer:
The equilibrium concentrations are [N₂O] = 1.00 mol/L; [O₂] = 0.50 mol/L; [NO] = 1.00 mol/L. Kc = 2.0.
Explanation:
First, write the balanced chemical equation with an ICE table.2N₂O + O₂ ⇌ 4NOI/mol·L⁻¹: 0; 0; 3.00C/mol·L⁻¹: +2x; +x; -4xE/mol·L⁻¹: 2x; x; 3.00 - 4xAt equilibrium, [N₂O] = 2x mol/L= 1.00 mol/L.So x = 0.50Then [O₂] = x mol/L = 0.50 mol/Land [NO] = (3.00 - 4x) mol/L = (3.00 – 4×0.50) mol/L = 1.00 mol/LKc=[NO]4[N2O]2[O₂]=1.0041.002×0.50 = 2.0
If 40 grams of NaCl was dissolved in 100 grams of water at 100 degrees Celsius, the solution would be.
a. ) saturated
b. )unsaturated
c. )supersaturated
d. )saturated with excess
Answer:
saturated solution
Explanation:
Identify the lewis acid in this balanced equation: upper a g superscript plus, plus 2 upper n upper h subscript 3 right arrow upper a g (upper n upper h subscript 3) subscript 2 superscript plus. ag nh3 ag(nh3)2
The equation that has been the representation of the net ionic equation has been Upper H superscript plus, plus upper O upper H superscript minus right arrow upper H subscript 2 upper O.
What is the balanced equation?
A balanced equation is an equation for a chemical reaction in which the number of atoms for each element in the reaction and the total charge is the same for both the reactants and the products.
The balanced chemical equation for the reaction has been:
[tex]\rm Mg(OH)_2+2HNO_3-- > Mg(NO_3)_2+H_2O[/tex]
The net ionic equation has been given as the ionic form of the reactants and product that has been formed in the reaction. The ions same on the product and reactant side of the equation has been eliminated in the net ionic equation.
The net ionic equation for the given chemical reaction has been:
[tex]\rm Mg^{2+}+OH^++2H^++2NO^{-}_3-- > Mg^{2+}+NO^{-}_3+2H_2O\\\\OH^{-}+2H^+-- > 2H_2O[/tex]
The equation that has been the representation of the net ionic equation has been Upper H superscript plus, plus upper O upper H superscript minus right arrow upper H subscript 2 upper O. Thus, option A is correct.
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Answer:
A on edge
Explanation:
Just trust
how to calculate amount of copper obtained from a reaction
Answer:
22g of copper?
Explanation:
Please help me on this question
If 4.5 moles of nitric acid falls into 8000 L of pure water, what will be the change of the pH of the solution? Show all of your work for full credit. (Note that nitric acid dissociates completely and puts in one hydrogen ion for each molecule of nitric acid).
*due soon*
Answer:
3.24
Explanation:
It is known that nitric acid is a strong acid, so it will dissociate completely, resulting in [tex]H^+[/tex] and [tex]NO_3^-[/tex] ions being present in solution. We also know that pure water has a neutral pH due to the chemical equilibrium of [tex]H_2O(l)[/tex] ⇄ [tex]H^+(aq) + OH^-(aq)[/tex] signifying equal parts of hydrogen and hydroxide ions.
Now, we must convert from 4.5 moles of nitric acid to moles of hydrogen. This can be accomplished using unit conversions and the chemical dissociation equation [tex]HNO_3(s) - > H^+(aq) + NO_3^-(aq)[/tex]
[tex]4.5molHNO_3 * \frac{1 mol H}{1 mol HNO_3} = 4.5molH+[/tex]
Then, using the pH equation [tex]-log[H+] = pH[/tex] and the formula for molarity [tex]M = \frac{g}{L}[/tex], we can find the value of [tex][H^+][/tex] and in turn the pH of the resulting solution. Keep in mind that both answers for grams of the hydrogen ion and molarity of the hydrogenion should have two significant figures.
[tex]4.5mol H^+ * \frac{1.01gH^+}{1 mol H^+} = 4.6g H^+\\\frac{4.6gH^+}{8000L sol} = 5.8*10^{-4} M H^+[/tex]
Now the pH equation may be used.
[tex]-log(5.8*10^{-4}) = 3.24[/tex]
Note that logarithmic significant figures dictate that the logarithm of a number with x significant figures will result in a value with x digits after the decimal point, meaning that this answer will have two digits after the decimal point and three significant figures.
Which species can act as an acid?
A. S0₂
B.
NH4+
C. CO2
D.
PO43-
Which of the following is the correct balanced equation for the breakdown of carbonic acid (H2CO3) into water and carbon dioxide? A. H2CO3 H20 + 3CO2 B. H2CO3 → H2O + CO2 C. 2H2CO3 + H2O + 3C02 D. 2H2CO3 - 2H20 + 3C02
When discussing distances between objects in the solar system, which term do you use?
Actual distance
Apparent brightness
Relative brightness
Relative distance
Answer: (D) Relative Distance
Explanation:
.
Describe what the Sim evidence shows you about attraction. Remember to use the words attraction, freedom of movement, kinetic energy, and overcome in your response
During change of phase, the molecules of a substance acquire enough kinetic energy to overcome the forces of attraction between its molecules.
What is change of phase?Change of phase occurs when a substance acquires enough energy to overcome the forces of attraction between its molecules to transition from one state of matter to another.
During a change of phase, kinetic energy of the molecules of the substance increases due to the application of heat, and the freedom of movement of the molecules increases.
Change of phase can occur as follows;
from solid to liquid and vice versafrom solid to gas and vice versafrom liquid to gas and vice versaTherefore, during change of phase, the molecules of a substance acquires enough kinetic energy to overcome the forces of attraction between its molecules leading to increased freedom of movement of the molecules.
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Answer:During change of phase, the molecules of a substance acquire enough kinetic energy to overcome the forces of attraction between its molecules.
What is change of phase?
Change of phase occurs when a substance acquires enough energy to overcome the forces of attraction between its molecules to transition from one state of matter to another.
During a change of phase, kinetic energy of the molecules of the substance increases due to the application of heat, and the freedom of movement of the molecules increases.
Change of phase can occur as follows;
from solid to liquid and vice versa
from solid to gas and vice versa
from liquid to gas and vice versa
Therefore, during change of phase, the molecules of a substance acquires enough kinetic energy to overcome the forces of attraction between its molecules leading to increased freedom of movement of the molecules.
Explanation:
Look at the reaction below. upper h subscript 2 upper s upper o subscript 4 (a q) plus upper c a (upper o upper h) subscript 2 (a q) right arrow upper c a upper s upper o subscript 4 (a q) plus 2 upper h subscript 2 upper o (l). which substance is the base in the reaction? 2h2o (l) h2so4 (aq) caso4 (aq) ca(oh)2 (aq)
In the given reaction, the substance that is the base of the reaction is [tex]CaSO_4[/tex]. The correct option is C.
What is a base?The base is a slippery liquid that is bitter and turns red litmus paper to blue.
Bases react with acids to form salts.
Then bases have pH above 7.
Examples of bases are calcium carbonate, sodium hydroxide, etc.
Thus, the correct option is C.
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Answer:
D. Ca(OH)2 (aq)
Explanation:
Correct on Edge 2022!!!
Good luck everyone, you got this! Have a great day!
50 points Acids & Bases
please help me children
Answer:
See below ↓↓↓↓
Explanation:
1)
a)
HCl + NaOH → NaCl + H₂Ob)
HNO₃ + KOH → KNO₃ + H₂Oc)
Mg(OH)₂ + H₂CO₃ → MgCO₃ + 2H₂Od)
Al(OH)₃ + 3HCl → AlCl₃ + 3H₂OWhat is the molar mass of NaCl? If you need to add 0.2 moles of NaCl to 500 mL of water, how many grams of NaCl do you need to add?
Answer:
321 g
Explanation
All you need to know here is that the molarity of a solution tells you the number of moles of solute present in exactly
1 L
of the solution.
In your case, a
2.20-M
sodium chloride solution will contain
2.20
moles of sodium chloride, the solute, for every
1 L
of the solution.
So if every
1 L
of this solution must contain
2.20
moles of sodium chloride in order for the solution to have a molarity of
2.20 M
, it means that
2.50 L
of this solution must contain
2.50
L solution
⋅
2.20 moles NaCl
1
L solution
=
5.50 moles NaCl
To convert the number of moles of sodium chloride to grams, use the molar mass of the compound.
5.50
moles NaCl
⋅
58.4 g
1
mole NaCl
=
321 g
−−−−−
The answer is rounded to three sig figs.
Covalent compounds are prevalent in nature and are the primary structure of most organisms. Based on the periodic table, which pair of elements would most likely form a covalent bond?
boron (B) and carbon (C)
aluminum (Al) and silicon (Si)
carbon (C) and oxygen (O)
magnesium (Mg) and sulfur (S)
Based on the periodic table and due to their nonmetallic nature, carbon (C) and oxygen (O) form covalent bonds.
What is a covalent bond?A covalent bond is a type of chemical bond in which elements share electrons. It is formed between nonmetals.
Based on the periodic table, which pair of elements would most likely form a covalent bond?
boron (B) and carbon (C). B is a metalloid and C a nonmetal, so they don't form covalent bonds.aluminum (Al) and silicon (Si). Al is a metal and Si a metalloid, so they don't form covalent bonds.carbon (C) and oxygen (O). Both C and O are nonmetals, so they do form covalent bonds.magnesium (Mg) and sulfur (S). Mg is a metal and S a nonmetal, so they don't form covalent bonds.Based on the periodic table and due to their nonmetallic nature, carbon (C) and oxygen (O) form covalent bonds.
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What is the mass defect?
A. It is seen as an increase in the masses of daughter elements.
B. It is identified as a missing line on an absorption spectrum.
O C. It is the difference between measured mass and average isotope
mass.
D. It is the difference between nuclear mass and the mass of its
components.
SUB
Mass defect is define as the difference between nuclear mass and the mass of its components.
What is mass defect?As the name suggested that defect in mass of any substance given idea about the mass defect and it will be define as the difference between the atomic mass of an atom and sum of the masses of all constitute particles present inside the nucleus.
Mass of daughter nuclei will take in consideration when only nuclear reaction takes place.Missing line of absorption is not related to the mass, else it is related to the concentration.Difference between measured mass and average isotope is not considered in mass defect because it is calculated for the individual atom not for all isotopes of that atom.Hence it is the difference between nuclear mass and the mass of its
components.
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#SPJ1
Define the term oxide
Answer: is the chemical compound that contains one oxygen atom and one other element in it chemical formular
Explanation:
Oxide - is a binary compound of oxygen with a more electropositive element or group
Hope this helps :))
What is the best definition of
nucleus?
A. The nucleus is the outer shell of the atom.
B. The nucleus is the center of the atom.
C. The nucleus is the combination of several
Answer:
usually round part of most cells that is enclosed in a double membrane, controls the activities of the cell, and contains the chromosomes. 2 : the central part of an atom that comprises nearly all of the atomic mass and that consists of protons and neutrons.
Explanation:
please consider as brainlest if i helped you
usually round part of most cells that is enclosed in a double membrane, controls the activities of the cell, and contains the chromosomes. 2 : the central part of an atom that comprises nearly all of the atomic mass and that consists of protons and neutrons.
Consider the balanced reaction
below:
P2O3 + 3H2O → 2H3PO3
How many grams of diphosphorus
trioxide, P203, are required to
produce 10.2 moles of phosphorous
acid, H3PO3?
Answer:
561 [gr.].
Explanation:
try the option suggested in the attached picture. The answer is underlined with orange colour.
can heat energy be converted into chemical energy
Please help me answer this question about fullerenes. 30 points available and brainliest.
Answer: B.
Hope this helps! :)
Mark me brainliest please.
Answer:
Large hollow-shaped molecules of hexagonal carbon rings
Explanation:
looks like a soccer ball
wikipedia
19. What is the new volume of a solution that is created when 4. 2 mL of a 9. 1 M NaOH stock solution is diluted to a concentration of 2. 8 M? (M1V1 = M2V2 )
A) 6. 0 mL
B) 7. 38 mL
C) 10. 1 mL
D) 13. 65 mL
Answer:
A 6.0
Explanation:
Science question, Giving brainiest!
Answer:
im not 100% sure but i think it is :A
Explanation:
A volatile liquid is one that choose. Quickly so it transitions easily into the choose. Phase.
A volatile liquid is one that reacts quickly so it transitions easily into the ground energy state phase.
Ground energy state refers to the state in which is achieved by something burning all of it's potential energy, so that it is in equilibrium. As an example, an apple falling to the ground from a tree . this is because until it hits the ground, it has potential or otherwise some form of energy to burn, disturbing it's equilibrium.
What is the pressure, in atmospheres, of 14.3 moles of a gas at a temperature of 485 K in a 187 liter container?
P
V
=
n
R
T
R = 0.0821
a
t
m
⋅
L
m
o
l
⋅
K
Answer:
3.04 atm
Explanation:
First note r is in l*atm/mole*K
PV=nRT
P = nRT/V = 14.3(.0821)(485)/187 = 3.04 atm
Chloroplasts and mitochondria are both involved in energy conversion in eukaryotic cells and share many similarities. Differentiate between chloroplasts and mitochondria. Choose ALL of the characteristics that apply ONLY to mitochondria.
A) Mitochondria need water and oxygen.
B) Mitochondria are only found in animal cells.
C) Mitochondria convert glucose into ATP energy.
D) Mitochondria have a double membrane and their own DNA.
E) Mitochondria require oxygen and release carbon dioxide.
Answer:
The answer is C and E
Explanation:
I just had that question
Answer:
c and e
Explanation:
If 45.0 mL of a 4.00 M sodium sulfate (Na2SO4) solution is used for a reaction, how many moles of solute were present in the solution?
____ moles
2. How many moles of carbon dioxide, CO2, are in a 22 gram sample of the compound?
How many liters do you need to make a 1.2 M solution using 54.4 grams of copper (II) fluoride?
Answer:
Our differences make us special.
Explanation:
Which is NOT a blood type?
A
B
C
O
there is no answer to your question because all of the options ARE blood types so there is no telling.
What is the difference between saturated fat and trans fat?
Answer:
The main difference between trans fat and saturated fat is that trans fat raises low-density lipoprotein (LDL) levels and drops high-density lipoprotein (HDL) levels in the blood whereas saturated fat raises both LDL and HDL levels in the blood.
Explanation:
Stay safe fam :)