Answer:
[tex]2H_2O\rightarrow 2H_2+O_2[/tex]
Explanation:
Hello there!
In this case, for the reaction by which water is decomposed to molecular hydrogen and oxygen:
[tex]H_2O\rightarrow H_2+O_2[/tex]
It is necessary to perform the inspection balance process since there is a dissimilar number of atoms of oxygen on both sides; therefore, by putting a 2 on water we balance oxygen:
[tex]2H_2O\rightarrow H_2+O_2[/tex]
But now, there are four hydrogens on the left; therefore, we put a 2 on hydrogen to finally balance it:
[tex]2H_2O\rightarrow 2H_2+O_2[/tex]
And obviously, the coefficient in oxygen is an unwritten 1.
Best regards!
What type of energy must you add to a substance to make the particles of the substance
move faster?
A. thermal
B. potential
C. mechanical
D. geothermal
Answer: thermal energy a}
Explanation:
Thermal energy (also called heat energy) is produced when a rise in temperature causes atoms and molecules to move faster and collide with each other. The energy that comes from the temperature of the heated substance is called thermal energy.
Complete the missing information in the reactions. Then, label the reaction one of the following:
Alpha Decay
Electron Capture
Beta Decay
Positron Emission
.
14
N +
0
Type:
238
92
234
90
Th +
Type:
15
0
15
N +
7
Type:
8
0
32
15
Type:
105
Ag +
47
105
Pd
46
Type:
40
Type:
20
I
244
94 Pu -
Type: :
9. Circle the atom in each pair that has the greater ionization energy.
A) Li or Be
B) Ca or Ba
C) Na or K
D) P or Ar
E) Cl or Si
F) Li or K
A) Be
B) Ca
C) Na
D) Ar
E) Cl
F) Li
This question simply deals with ionization energy trends across the periodic table or down the group.
Ionization energy is the energy that is needed to remove an electron from its orbital around an atom in such a manner that it will no longer be associated with that same atom.
Now, from studies, it has been found that Ionization energy decreases down a group but it tends to increase as we go from the left to right going across the periodic table.
A) Li(Lithium) and Be(Berrylium) belong to the same period which is period 2 on the periodic table. Berrylium comes after berrylium in that period and as such from the rule earlier, berrylium will have the greater ionization energy.
B) Ca(Calcium) and Ba(Barium) belong to the same group 2 in the periodic table with barium further down the group. Thus, from the trend, Ca(Calcium) will have the greater ionization energy.
C) Na(Sodium) and K(Potassium) belong to the same group 1 in the periodic table with potassium further down the group. Thus, from the trend, Na(Sodium) will have the greater ionization energy.
D) P(Phosphorus) and Ar(Argon) belong to the same period which is period 3 on the periodic table. Argon comes after Phosphorus in that period and as such from the rule earlier, argon will have the greater ionization energy.
E) Cl(Chlorine) and Si(Silicon) belong to the same period which is period 3 on the periodic table. Cl(Chlorine) comes after Si(Silicon) in that period and as such from the rule earlier, Cl(Chlorine) will have the greater ionization energy.
F) Li(Lithium) and K(Potassium) belong to the same group 1 in the periodic table with potassium further down the group. Thus, from the trend, Li(Lithium) will have the greater ionization energy.
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2 Na + Cl2 --> 2 NaCl
What is the mole ratio of chlorine to sodium chloride?
Answer:
1 : 2 ratio
Explanation:
Chlorine has a coefficient of 1, and sodium chloride has a coefficient of 2.
Complete the sentence:
The north pole of a magnet____ the north pole of another magnet.
-will attract
-may repel, attract, or not affect
-will not affect
-will repel
the north pole of the magnet will repel the north pole of another magnet
What is the average speed of a race car if it travelled a total of 500 miles in 3.5 hours
Answer:
speed = 142.8571 miles per hour OR 142.8571 mi/h
Explanation:
speed= [tex]\frac{distance}{time}[/tex]
distance = 500, time = 3.5hours or 210 minutes
speed= [tex]\frac{500}{210}[/tex] = 142.8571
hope this helps!!!!
which gas would diffuse rapidly at the same temperature and pressure UF6 or CL2
Answer:
UF6
Explanation:
please help im so bad at science
a.bond energy
c. endothermic reaction
d. exothermic reaction
f.exothermic
g.endothermic
define the term pure substance
Answer:
Pure substances are substances that are made up of only one kind of particles and has a fixed or constant structure. Pure substances are further classified as elements and compounds. An element is a substance that consists of only one type or kind of atom
Answer:
define the term pure substance :
A pure substance does not have to be of a single element or compound, This can either be one single element or one single compound, but every sample of this substance that you examine must contain exactly the same thing with a fixed, definite set of properties
Explanation:
What properties can be used to identify puree substances?
Explanation:
1 it easily won't break down using any chemical
2 it is difficult to extract it using chemical process
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chetana
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A reaction is first order with respect to reactant A and second order with respect to reactant B. Starting with [A] = 0.175 M and [B] = 0.00250 M, the reaction rate is 2.83 x 10−5 M.S−1. What is the rate constant k? Show your work.
Answer:
[tex]k=25.9M^{-2}s^{-1}[/tex]
Explanation:
Hello there!
In this case, since rate laws are written by considering the rate constant, concentration and specific orders of reaction of the concentration of the species contributing to the rate of reaction, we write:
[tex]r=k[A][B]^2[/tex]
Since it is first-order with respect to reactant A and second-order with respect to reactant B. In such a way, given the rate and concentrations of both A and B, the involved rate constant k turns out to be:
[tex]k=\frac{r}{[A][B]^2} \\\\k=\frac{2.83x10^{-5}M/s}{(0.175M)(0.00250M)^2}\\\\k=25.9M^{-2}s^{-1}[/tex]
Best regards!
PLZZZZZZZZ HELP PLZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ PLZ PLZ PLZZZZZZZ these are satellite images taken of the same area in 1986 and in 2020 what can these images be used to monitor
Answer:
I believe it is how land use changed over time
Explanation:
The images only show us the labels of communities and farm land/ forests. There is no evidence to support that this map would be monitoring water quality, pollution, etc. The only visible change is the change in land.
How may moles are in 88.4 grams of Al(OH)3?
Answer:
1.133mol Al(OH)3
Explanation:
88.4/78.003 = 1.133
__MgCl2 +
_Na3PO4 -->
NaCl
_Mg3(PO4)2 +
---
In the reaction above, how many moles of sodium chloride would be produced
if you started with 20 grams of magnesium chloride and excess sodium
phosphate? The equation is not balanced.
(If anyone can answer in depth if appreciate it )
Answer:
24.5 g of NaCl
Explanation:
We begin from the balanced reaction:
3MgCl₂ + 2Na₃PO₄ → 6NaCl + Mg₃(PO₄)₂
If the sodium phosphate is in excess, then the limting reagent is the magnessium chloride.
We convert mass to moles:
20 g . 1mol / 95.2g = 0.210 moles.
3 moles of MgCl₂ can produce 6 moles of NaCl
0.210 moles of salt, may produce (0.210 . 6) /3 = 0.420 moles
Ratio of reactant is twice the product
We convert the moles to mass:
0.420 mol . 58.45 g/mol = 24.5 g
URGENT!!! ANSWER ASAP!!!!
A student with the flu was given medication that tasted bitter. Other than taste, which other test would confirm which type of compound was in the medication? Chose the two statements that apply.
A. It feels slippery
B. It reacts with metal
C. It turns blue litmus red
D. It turns red litmus blue
HINT!!! it is not B and D.... one of them could be right. but the other is wrong. pls help meeeee!!!!
PLS HELP
Answer:
C
Explanation:
i hope i helped you and have a nice day...
I used a stick of (vegan) butter as our example of thinking about how temperature changes the properties of something when it is wamer or cooler.
1. What is something else you could use to describe how temperature affects the properties of when it is warmer or cooler? How does this change whether it is warm or cold. Describe it.
Determine the products when aqueous solutions of CoCl2 and Na3PO4are reacted together.
i need to write a brief paragraph on why this lab is important, please help!! here is the question!
How can the properties of acids and bases be used to classify solutions?
Answer:
Acids and bases aqueous solutions will conduct electricity because they contain dissolved ions. Therefore acids and bases are electrolytes. strong acids and bases will be electrolytes. weak acids and bases will be weak electrolytes.
Can I find the state of Ca3N2 using the solubility rules? If so how because there is no Nitride in the solubility tables, I don't understand.
Answer:
The day I was in the shower and I will be there at remove the day I was in the shower and I will be there at remove the day to see if you have any questions please feel free to contacts and the day I was in the shower and I will be there at remove the day I was in the shower and I will be there at remove the days of the week are you
Explanation:
because the calcium is combine with the nitride so the total solubility will change forming Ca3N2
What is the percent composition of water found in tin (IV) oxide octahydrate?
Answer:
tin (IV) oxide octahydrate contains 8 part water
What is the percent composition of water found in tin (IV) oxide octahydrate?
Why does the moon have a stronger gravitational effect on the earth then the sun?
Explanation:
The tidal forces of the Moon are much stronger than the Sun's because it is so much closer to our planet, causing a much greater variation in the gravitational force from one location to another. The Sun's gravitational force, on the other hand, varies much less because the Sun is so far.
Please mark me has brainliesthelp help like rn pls!!!!
Answer:
1.T
2.T
3.T
4.F
5.F
6.T
7.T
8.F
9.T
10.T
11.F
12.S
13.T
maaf kalo salah
3 of 12
Assessment: Force and Motion CBA
Four students recorded the time it took them to walk to school from their homes as shown in the table
below.
Student
1
2
3
Motion of Four Students
Distance (meters) Time (minutes)
1,100
20
1,026
19
848
16
795
15
4
Which student had the greatest average speed?
Student 1
Student 2
Student 3
Student 4
1
2
3
4
5
6
7
8
9
10
Next
6th grade science plz help Major grade Need help with 4,5, and 6
Which of the following is true of all stars? A) they produce energy and radiation B) they have about the same temperature c) they are generally the same size and color D) they produce energy for the same length of time
Answer:
A)
Explanation:
All stars produce some type of energy and radiation. But stars vary in temperature, size, color, and the length of energy they produce.
The pH of a solution is 9.67. Calculate [H+] for the solution
Answer:
2.14 x 10^-10 M
Explanation:
[H+] = 10^(-pH) = 10^-9.67 = 2.14 x 10^-10 M
WHAT CAN BE USED TO REPLACE OIL? help 30POINTS!!!!! ASAP
Answer:
Melted butter
Explanation:
Answer:
Look below
Explanation:
The following may be substituted cup for cup for vegetable oil in baked goods:
Applesauce, preferably unsweetened.
Banana, ripe and mashed.
Butter, melted.
Cauliflower – unseasoned, cooked, and pureed.
Ghee.
Margarine, melted.
Mayonnaise.
Pumpkin, cooked and pureed.
17. When you hold a soda can in your hand, you possess trillions and trillions of aluminum atoms. In one paragraph, using
your own words, explain how ions of aluminum atoms would generally interact based on their charges, and how that
interaction is overcome through metallic bonding to form the can that you hold.
PLEASE PUT REAL ANSWER OR I WILL REPORT YOU
MARKING BRAINLYEST TO FIRST PERSON
In the early 1900's, Paul Drüde came up with the "sea of electrons" metallic bonding theory by modeling metals as a mixture of atomic cores (atomic cores = positive nuclei + inner shell of electrons) and valence electrons. Metallic bonds occur among metal atoms. Whereas ionic bonds join metals to non-metals, metallic bonding joins a bulk of metal atoms. A sheet of aluminum foil and a copper wire are both places where you can see metallic bonding in action.
Metals tend to have high melting points and boiling points suggesting strong bonds between the atoms. Even a soft metal like sodium (melting point 97.8°C) melts at a considerably higher temperature than the element (neon) which precedes it in the Periodic Table. Sodium has the electronic structure 1s22s22p63s1. When sodium atoms come together, the electron in the 3s atomic orbital of one sodium atom shares space with the corresponding electron on a neighboring atom to form a molecular orbital - in much the same sort of way that a covalent bond is formed.
The difference, however, is that each sodium atom is being touched by eight other sodium atoms - and the sharing occurs between the central atom and the 3s orbitals on all of the eight other atoms. Each of these eight is in turn being touched by eight sodium atoms, which in turn are touched by eight atoms - and so on and so on, until you have taken in all the atoms in that lump of sodium. All of the 3s orbitals on all of the atoms overlap to give a vast number of molecular orbitals that extend over the whole piece of metal. There have to be huge numbers of molecular orbitals, of course, because any orbital can only hold two electrons.
The electrons can move freely within these molecular orbitals, and so each electron becomes detached from its parent atom. The electrons are said to be delocalized. The metal is held together by the strong forces of attraction between the positive nuclei and the delocalized electrons Hope this helped
How many molecules of water are there in 10 lbs of water?
55.556
Explanation:
or something like that