Bubbles are released when nitric acid is added to a potassium carbonate solution.
What is the net ion
How are seasons different North & South of the equator
Answer:
seasons experienced by the northern and southern hemisphere always differ by six months when it is summer in the northern hemisphere, it is winter in the southern hemisphere
Explanation:
Answer:
ohhhhhhh she -he was having a point
Express the percent composition of each
element in C10H8.
Answer:
Element Symbol Mass percent
Carbon C 93.7088
Hydrogen H 6.2912
A screw decreases the amount of work done.
True
False
Answer:
tru
Explanation:
How many miles will a person run a 400 km race?
Answer:
248.548
Explanation:
Name 5 things that the periodic table includes about 1 atom for each element:
1.
2.
3.
4.
5.
Answer:
They are listed below
Explanation:
The 5 things that the periodic table includes are;
1. Name of the element
2. The symbol of the element
3. Atomic number of the element
4. Relative atomic mass
5. Electron configuration
16. Keesha performed a chemical reaction, and the products looked quite
different from the reactants. She knew the amount of matter had not
changed due to the law of conservation of mass. According to the law of
conservation of mass, what happens in a chemical reaction? *
Answer:
it's the third one
Explanation:
matter can't change, but mass can differ
4 points
9. Name the scientists that played a major role in the development of cell theory. *
The useful energy a light bulb gives out is
(a). kinetic energy (b) chemical energy (c) light energy
science subject
Answer:
Light bulb gives light energy which is usefull
Answer:
(c) light energy
Explanation:
As bulb is used for giving light and hence the energy that it gives is light energy.
50 pts! Please help, much appreciated (:
2. Consider the table of boiling points and structural isomers. Note that butane has two possible isomers but that decane has 75 possible isomers. Why does the number of possible isomers go up with an increasing number of carbon atoms?
Answer:
because the number of constitutional confirmation , and geometric isomers goes up with each carbon atom added there are many more possible configurations and connectivities possible with decane , a 10 carbon chain , than with butane, a 4 carbon chain
"The number of possible isomers go up with an increasing number of carbon atoms because as the number of carbon atoms increases the tendency to form branching with other carbon atom increases as well."
What is isomer?
Isomers are molecules or polyatomic ions that have the same molecular formulas that is, the identical number of atoms of each element but different atomic configurations in space. Isomerism refers to the existence or potential of isomers. Isomers don't have to have the same chemical or physical properties.
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What is the amount of aluminum chloride produced from 40 moles of chlorine and excess aluminum?
Answer: Molar mass of Al = 26.98 g/mol
mass of Al = 12 g
mol of Al = (mass)/(molar mass)
= 12/26.98
= 0.4448 mol
According to balanced equation
mol of AlCl3 formed = moles of Al
= 0.4448 mol
Answer: 0.445 mol
hope this help boo❤️❤️❤️
Explanation:
9.
Which element is most likely to conduct heat and electricity?
A. Na B. Ca C.P D. Ne
Answer:
A. Na
Explanation:
Sodium is a good conductor of electricity and heat because it has only one electron in its valence shell.
i hope this helps :)
Answer:
C.) P
Explanation:
I believe this is correct, lmk if it's not.
how many grams of H2O are in 3.00 moles of H2O?
Answer:
mole=mass/molarmass
Explanation:
molar mass of h2o=18
as the train rushes down the hill the kinetic energy of the train _____ and the gravitational potential stored between the train and earth ________
FOR 40 points!!!! I need the whole page finish !!!!!! Pleaseeeeee!!!!!!! I will five u brainlist !!!!!!
An effective treatment for some cancerous tumors involves irradiation with "fast" neutrons. The neutrons from one treatment source have an average velocity of 3.5×107 m/s. If the velocities of individual neutrons are known to within 2.0% of this value, what is the uncertainty in the position of one of them?
Answer:
4.54 * 10^-14 m
Explanation:
From Heisenberg's uncertainty principle, we can write;
Δp.Δx ≥ h/4π
Given that;
Δp =Δmv
So;
Δmv.Δx ≥h/4π
Δmv =2/100(3.5×10^7 m/s * 1.66 * 10^-27)
Δmv =1.162 * 10^-21 Kgms-1
Δx ≥6.63 * 10^-34 /4 * 3.142 * 1.162 * 10^-21
Δx ≥4.54 * 10^-14 m
Most chemical reactions have what
Answer:
The first one
Explanation:
Hope it helps
Answer:
I think it would be: have starting substances that collide with each other
Explanation:
Two or more reactants interact to create different substances called products.
2 X(9) + Y (9) = 2XY (9)
A reversible reaction is represented by the equation above. The amounts of reactants and products at time 1 are shown in the particle diagram on the left. The particle diagram on the right shows the
amounts of reactants and products at time 2. Based on the diagrams, what can be inferred about the relative rates of the forward and reverse reactions between time 1 and time 2?
a. nothing can be inferred because the total number of X and Y atoms is the same
each diagram
b. Nothing can be inferred because the temperature of the system may have been changed
c. The rate of the reverse reaction is greater than the rate of the forward reaction
d. The rate of the forward reaction is greater than the rate of the reverse reaction.
Answer:
The answer is D. The rate of the forward reaction is greater than the rate of the reverse reaction.
Explanation:
The forward reaction rate was greater than the reverse reaction rate because more product is present at time 2. This is the answer from ap classroom.
The given reaction has been inferred the increased rate of forward reaction than reverse reaction. Thus, option D is correct.
The chemical reaction has been given by the combination of reactants for the formation of product. The reactants combine in the fixed proportion to form the product.
The rate of reaction has been defined as the rate of formation of product or the disappearance of reactants.
Rate of reactionThe forward reaction has been given as the rate of formation of product. The reverse reaction has been given as the rate of dissociation of product.
In the given condition, the number of reactant at time 1 are more than the reactant at time 2. This states that there has been increased formation of the product at time 2.
Thus, the given reaction has been inferred the increased rate of forward reaction than reverse reaction. Thus, option D is correct.
Learn more about reverse reaction, here:
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PPPPPPPPLLLLLLLLLSSSSSS HHHHHHEEEEEELLLLPPPPP!!!!!!!!!!!!!!
Answer:
B
Explanation:
The student is not able to move the box in D --> 55N, 0N. Since the net force is 0, it means that no force is being applied. So you will choose answer B from your options.
Hope this helps, thank you !!
Which family group on the peirodic table has the most elements
a. metals
b. nonmetals
c. trainsiton elements
d. metalloids
Answer:
C. Transition metals
Explanation:
Out of the answers transition metals have the most elements on the periodic table.
As you climb through the upper stratosphere, the temperature: increases decreases in constant
Answer:
It increases.
Explanation:
I hope this helps.
Answer:
Increases
Explanation:
Hope this helps :)
When developing a product such as cookware specific heat well as health cost and ease of use our important factors to consider one of the materials tested which is the best suited for cookware and why explain based on safety/health cost specific heat and ease of use
Answer:
In short, the thermal conductivity of a material is how readily that material absorbs and transmits (releases) energy. When the fire or heating element of a range comes in contact to a pan, the energy from the heat source is transmitted to the pan. This increases the internal kinetic energy of the pan (commonly called "heating up"). The heated material then transmits the energy to nearby materials that are at a lower average molecular kinetic energy level (at a lower temperature than the material). The higher the thermal conductivity of the material, the faster it will heat up and also, the faster the heated area will spread to unheated areas of the same piece of material.
For example, if we placed a large sheet of stainless steel (fairly low thermal conductivity as cooking materials go) on a burner and turned on the burner, the area directly under the burner would get hot while the rest of the sheet slowly heats up. The burner imparts heat quickly only to the region of steel directly over it. The rest of the pan heats up from the conduction of the heat from that spot. When the outer edges of the sheet have reached a hot temperature, the spot directly over the burner would be extremely hot. The figure below shows an example of the temperature of the sheet of steel over a gas burner. The hottest parts are shown in white, hot is red and cool is blue.
Explanation:
No explanation hope i'm not wrong
blance: Mg + HNO2 → Mg(NO2)2 + H2
Explanation:
Mg + 2HNO2 → Mg(NO2)2 + H2
Answer:
Mg + 2HNO2 → Mg(NO2)2 + H2
Explanation:
I need help with question 4!!!!!!!
*Please choose correctly*
Thank youuuu
Answer:
hshzjndbejkxn. znkskakannamzm msk
Chemistry question on enthalpy HELP!!!!
Answer: The enthalpy change for this reaction is, -803 kJ
Explanation:
The balanced chemical reaction is,
[tex]CH_4(g)+2O_2(g)\rightarrow CO_2(g)+2H_2O(g)[/tex]
The expression for enthalpy change is,
[tex]\Delta H=\sum [n\times \Delta H_f(product)]-\sum [n\times \Delta H_f(reactant)][/tex]
[tex]\Delta H=[(n_{CO_2}\times \Delta H_{CO_2})+(n_{H_2O}\times \Delta H_{H_2O})]-[(n_{O_2}\times \Delta H_{O_2})+(n_{CH_4}\times \Delta H_{CH_4})][/tex]
where,
n = number of moles
Now put all the given values in this expression, we get
[tex]\Delta H=[(1\times -394)+(2\times -242]-[(2\times 0)+(1\times -75)][/tex]
[tex]\Delta H=-803kJ[/tex]
Therefore, the enthalpy change for combustion of methane is, -803 kJ
need points & are good at science?
Answer:
A
Explanation:
I believe the Correct answer would be A
PLEASE HELPPPP!!! IM BEING TIMED
Based on Map 1, which statement describes the main cause of the
weather pattern known as the Arizona monsoon?
A)Much of the southwestern United States is desert.
B)Ocean water to the south of Arizona is warm.
C)Winds at this latitude tend to blow from west to east.
D)Land masses heat up more quickly than oceans.
Answer:
B)
Explanation:
This should be the correct answer, lmk if it's not
As in the given image, the weather pattern known as Arizona monsoon is caused by the winds at this latitude tend to blow from west to east. Thus, option C is correct.
What is Arizona monsoon?The Arizona Monsoon is a well-defined meteorological phenomenon that affects the southwest region of North America during the summer. It is scientifically referred to as a meteorological "singularity."
Arizona experiences its strongest wind flow during the winter months from the west or northwest, coming from California and Nevada. The winds change to a southerly or southeasterly direction as the summer months approach.
From the Pacific Ocean and the Gulf of Mexico, moisture moves northward. Statewide moisture conditions are drastically altered as a result of this alteration.
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Hello can someone pls help me with this question! (Please explain why)
QUESTION: How is an increase in surface area achieved?
A. increasing the size of the reactant particles
B. decreasing the size of the reactant particles
Answer:
letter A.
Explanation:
the rate of a chemical reaction can be raised by increasing the surface area of a solid reactant. this is done by cutting the substance into small pieces, or by grinding it into a powder.if the surface area of a reactant is inceased: more particles are exposed to the other reactant.
HOPE IT HELPS(◍•ᴗ•◍)❤
Hold the slides for observation
Question 13 (3 points)
.Which one of the following is not a scientific variable?
independent
statement
O control
dependent