Of the three types of plate boundaries, which type is most likely to be associated
with pulling or tension forces?
transform
convergent
divergent
1. What is a chemical reaction
a process that involves rearrangement of the molecular or ionic structure of a substance, as distinct from a change in physical form or a nuclear reaction.
Answer:
Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products. ... A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products
Explanation:
State and explain each law of motion.
Answer:In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass times its acceleration. In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction
Explanation:
Answer:
EEEEEeeEEeEEEEEEEeEEEEEEEEEE
Explanation:
e
Question 10 (1 point)
What is the name for MnO?
manganese oxide
manganese (II) oxide
manganese (IV) oxide
manganese (VI) oxide
Answer:
D it is D
Explanation:
an object moving with a speed of 5m/s has a kinetic energy of 100J what is the mass of the object
Answer:
k. e. = 1/2 mv^2
100 = 1/2 * m * 5^2
100 = 1/2 * m * 25
m = 100 *2/25
m = 8 kg
hope it helps you
Some fruits and vegetables are preserved by pickling them. Nandini got confused
with the various steps to be taken to preserve mangoes. Can you help her to
arrange them in the correct order?
1. Cut the mangoes into pieces.
2. Keep the pieces in the sun.
3. Add salt to the pieces.
4. Store it in a dry jar.
5. Wash and dry them
Answer:
ye
Explanation:
ye
How many moles are in 43 grams of lithium (LI)?
Answer:
6.19507275608684
Explanation:
What are the rows of the periodic table called?
O A. Atoms
O B. Groups
O C. Elements
O D. Periods
Answer:
B. Groups
Explanation:
What can help overcome a positive enthalpy of solution and allow a solid
solute to dissolve in water?
A. A decrease in entropy
B. A large amount of energy released
C. A large amount of energy absorbed
D. An increase in entropy
Answer: D. An increase in entropy
Explanation:
Entropy is the measure of randomness or disorder of a system. If a system moves from an disordered arrangement to an ordered arrangement, the entropy is said to increase and vice versa.
For a reaction to be spontaneous, the enthalpy of the solution must decrease and the entropy must increase.
To overcome a positive enthalpy of solution and allow a solid solute to dissolve in water, an increase in entropy would make the reaction spontaneous as the system would move to a more disordered state.
how many grams of sodium carbonate must react with 222 g of calcium chloride to make 233 grams of sodium chloride and 201 grams of calcium carbonate?
Answer: 212 g of sodium carbonate must react
Explanation:
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products formed must be equal to the mass of reactants taken.
In order to get the same mass on both sides, the atoms of each element must be balanced on both sides of the chemical equation.
The balanced chemical equation is:
[tex]Na_2CO_3+CaCl_2\rightarrow 2NaCl+CaCO_3[/tex]
Mass of products = mass of sodium chloride + mass of calcium carbonate = 233 g+ 201 g= 434 g
Mass of reactants= mass of sodium carbonate + mass of calcium chloride =x + 222 g
As the mass of reactants should be equal to mass of products
434 = x + 222 g
x = 212 g
Thus 212 g of sodium carbonate must react with 222 g of calcium chloride to make 233 grams of sodium chloride and 201 grams of calcium carbonate
5. CaCO, - CaO+CO,
Reaction Type
Answer:
(a) Decomposition: A substance breaks down to smaller species. [e.g. CaCO3(s) → CaO(s) + CO2(g) Decomposition of limestone to calcium oxide (quicklime) and carbon dioxide on heating.]
If you find a chemical in the lab and are unsure of
its identity, what is the best way to find out what it
is?
Answer:
C. read the label on the container
Explanation:
What information is found in an SDS? Check all that apply.
A. the identification of the chemical
C. the chemical and physical properties of the substance
D. the first-aid measures to take if an accident occurs involving the chemical
Answer:
C
Explanation:
just did it
5. __HCl + __NaOH-> __NaCl + __H2O
6. __FeS + __HCl-> __H2S + __FeCl2
7. __C2H4 + __O2-> __CO2 + __H2O
What are the balanced equations?
Answer:
5. balanced (1,1,1,1)(double replacement)
6. 1,2,1,1 (double replacement)
7. 1,3,2,2 (combustion)
Explanation:
please make me brailiest
Pick out the metals which can react with magnesium sulphate solution. Justify the answer.
calcium, aluminium, mercury, sodium, platinum, copper
Answer: aluminium, mercury , platinum and copper.
Explanation:
A single replacement reaction is one in which a more reactive element displaces a less reactive element from its salt solution. Thus one element should be different from another element.
A general single displacement reaction can be represented as :
[tex]XY+Z\rightarrow XZ+Y[/tex]
Thus the metals which are more reactive than magnesium will react with magnesium sulphate solution.
The metals which are more reactive than magnesium are aluminium, mercury , platinum and copper.
Who can help ? For BRAINLIST ( 6th grade work btw ) please help me
Answer:
Im not 100% sure but i think its option two or 1
Explanation:
14 steps decay series
Look at the picture. If one of the lightbulbs breaks or is removed, what will happen to the other lightbulb?
2 bulbs and a battery in a single loop of wire.
Question 2 options:
It will stay on
It will go off
It will change colors
It will burn out
HERES ANOTHER FOR YOU GUYS! :)
Answer:
It will go off.
Explanation:
Since the two bulbs are connected in series with the battery, when one bulb breaks breaks the circuit hence flow of current is stopped from moving to the other bulb
How is chemical bonding useful to our lives?
Answer:
Three types of chemical bonds are important in human physiology, because they hold together substances that are used by the body for critical aspects of homeostasis, signaling, and energy production, to name just a few important processes. These are ionic bonds, covalent bonds, and hydrogen bonds.
Explanation:
Why is there a leap year every four years?
Answer:
Because we are not perfect
Explanation:
This day is added to the calendar as a corrective measure, because the Earth does not orbit the sun in precisely 365 days.
When something heats up it moves faster when something close down it moves slower
Answer:
Yes
Explanation:
Answer:
THATS WHAT SHE SAID
Explanation:
How many moles are present in 5.24 x 1023 molecules of CH4?
Answer:
0.807 moles
Explanation:
No of molecules = No of mole × Avogadro's number
No of mole = No of molecules / Avogadro's number
No of mole = 5.24×10^23/6.02×10^23
0.870 moles
What happens to valence electrons in ionic bonding?
Answer:
they are either donated to or taken by another atom to achieve octet arrangement
Explanation:
for example Na+ and Cl- .. they both have one extra and one less electron .
so they donate and receive one electron to/from each other to achieve the octet arrangement ..
Which of the following is a layer of the solid Earth?
Answer:
The inner core is solid. But the mantle is solid/plastic
Explanation:
I completed the class Earth science
Answer:
The answer on study island in the LITHOSPHERE.
Explanation:
What is period? A group?
Hotter objects have _______________________ particles, while cooler objects have _______________________ particles.
Hope this helps
Hotter objects have faster particles, and cooler objects have slower particles.
Which type of climate does Florida have due to its latitude?
Please actually help me.
Thank you!
Answer:
I say 20 is ur best option
determine the theoretical yield.
aluminum metal reacts with aqueous nickel II sulfate to produce aqueous aluminum sulfate and nickel as a precipitate. in this reaction 108 grams of aluminum were combined with 464 grams of nickel II sulfate to produce 274 grams of aluminum sulfate.
The question is incomplete, the complete question is;
In this stoichiometry problem, determine the percentage yield:
Excess aluminum metal reacts with aqueous nickel(II) sulfate to produce aqueous aluminum sulfate and nickel as a precipitate. In this reaction 108 g of aluminum were combined with 464 g of nickel(II) sulfate to produce 274 g of aluminum sulfate.
Answer:
80%
Explanation:
The correct equation for this reaction is;
2Al(s) + 3NiSO4(aq) --------> Al2(SO4)3 + 3Ni(s)
We already know that Al is in excess then NiSO4 is the limiting reactant.
Hence, Number of moles in 464 g of NiSO4 = mass/ molar mass
Molar mass of NiSO4 = 155 g/mol
Number of moles = 464g/155g/mol = 2.99 moles
Number of moles of Al2(SO4)3 = mass/molar mass
molar mass = 342 g/mol
So, Number of moles = 274g/342g/mol = 0.8 moles
Given the stoichiometric reaction equation;
3 moles of NiSO4 yields 1 mole of Al2(SO4)3
2.99 moles of NiSO4 yields 2.99 * 1/3 = 1 mole of Al2(SO4)3
percentage yield is given by; actual yield/ theoretical yield * 100/1
actual yield = 0.8 moles of Al2(SO4)3
Theoretical yield = 1 mole of Al2(SO4)3
Hence;
% yield = 0.8/1 * 100 = 80%
An object has a density of 40 g/cm3 and a mass of 240 g what is it’s volume
Answer:
6cm^3
Explanation:
240/40=6
6 cm^3
Sodium Chloride is an ionic compound. Its molar mass is 58.44g. One formula unit of NaCl consists of one____, whose chemical symbol is___ and one___whose chemical symbol is___. Please help me to fill in the gaps :)
Answer: One formula unit of NaCl consists of one cation, whose chemical symbol is [tex]Na^+[/tex] and one anion whose chemical symbol is [tex]Cl^-[/tex]
Explanation:
For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.
The cation is formed by the metal sodium which forms [tex]Na^+[/tex] and the anion is formed by non metal chlorine which forms [tex]Cl^-[/tex].
For a formula unit of sodium chloride, the charges have to be balanced , thus the valencies of ions are exchanged and the neutral compound result. Thus
[tex]Na^+[/tex] and [tex]Cl^-[/tex] combine to form neutral [tex]NaCl[/tex]
