Answer:
Explanation:
Energy can come in many different forms such as mechanical energy, sound energy, electromagnetic energy, thermal energy, chemical energy, and nuclear energy.
15 Energy is measured in units called __________
Which of the following is true of folded mountains, fault-block mountains, and volcanic mountains?
Form from the buildup of lava and ash
Form only at boundaries between two oceanic plates
Form only at boundaries between two continental plates
Form at both convergent and divergent plate boundaries
Answer:
Here are the following answers to the five questions:
(1) "Form only at boundaries between two continental plates."
(2) "A fault-block mountain"
(3) "Island arcs form when hot, fluid rock rises through thin spots in Earth's crust, whereas hotspot volcanoes form when two oceanic plate boundaries push against each other until subduction happens and the plates partially melt."
(4) "The fault plane runs from the top of the rock to the bottom of the rock at an angle greater than 45 degrees."
(5) "Segments of Earth's crust bent and doubled over, and moving wind and water gradually shaped the rock into gently sloping domes."
Explanation:
Water’s property of surface tension is due to _____.
A. capillary action
B. solubility
C. cohesion
D. adhesion
E. All of the above
Answer:
C. cohesion
Explanation:
The cohesive force between liquid molecules are responsible for the phenomenon known as surface tension
how many moles of O2 are needed to produce 3.95 moles of Fe2O3
Answer:
4Fe+3O2- 2Fe2O3
the ratio: 3:2
x:3.95
x=5.92 moles of O2
Why would solar power be the best energy option for our new high school?
Explain why!
Answer:
Energy costs are high for many school districts. Therefore, unlimited free power generated by the sun can deliver huge cost savings when compared to grid-generated power. With a modestly sized solar array, cost savings are alike modest.
Explanation:
seriously what do i put in the x and y table im stuck and need to move to the next assignment
Remember the relationship
P is indirectly proportional to VSo
The pairs are
(2,4)(1,8)(4,2)(12,2/3)(2/3,12)And so on
What information does the percent composition of an atom in a molecule give?
A. The total number of atoms of that element in a molecule
B. The total mass that element contributes to a molecule
C. The relative amount of mass an atom contributes to a molecule
D. The relative number of atoms one element contributes to a molecule
Answer:
C
Explanation:
The percent composition of an atom in a molecule gives information regarding the relative amount of mass an atom contributes to a molecule.
Which of the following statements is true? Select one: a. A solution is a pure substance. b. A solution is a mixture. c. The solvent is dissolved in the solute. d. A solution has the same properties as a colloid.
Answer:
B
Explanation:
19. For the reaction, 2S+ 30=2SO3, how many moles of so3 will be produced from 12.5 g 02 and excess S?
19. For the reaction, 2S+ 30=2SO3, how many moles of so3 will be produced from 12.5 g 02 and excess S?
:
For the reaction: 2S(s) + 3O2 -> 2SO2(g) How many moles of SO3 will be produced from 2.0 mol O2 and excess S?
Answer:
Explanation:
19. For the reaction, 2S+ 30=2SO3, how many moles of so3 will be produced from 12.5 g 02 and excess S?
Give the correct name for the structure in the image.
Answer:
2,5,6-trimethyloctane
Explanation:
1) Count the number of carbons in the longest chain. If the structure contains a functional group (e.g. double bond, -OH), they have to be part of the chain that you're counting.
• The straight chain is the longest chain, and it contains 8 carbons
• Without the additional 3 methyl (-CH₃) substituents, it would be called octane (since it is an alkane)
2) Assign location numbers for the substituents, ensuring that they are the lowest possible numbers
• From left to right, we could name it as 2,5,6-trimethyloctane
• From right to left of the parent chain, it would be called 3,4,7-trimethyloctane
• Assigning from left to right gives us the lowest location numbers as the sum of the numbers is 13 instead of 14
• Remember to add 'tri' since we have 3 methyl groups
30cm3 of NaOH is neutralised by 12.3cm3 of 0.2mol/l HCI. What is the concentration of the NaOH. 0.82 mol/l 0.082 mol/l 82 mol/l 0.49 mol/l
Lets see
C1V1=C2V230C1=0.2(12.3)30C1=2.46C1=2.46/30C1=0.082mol/LAnswer:
Step 1: Calculate the amount of sodium hydroxide in moles
Amount of solute in mol = concentration in mol/dm 3 × volume in dm 3Amount of sodium hydroxide = 0.100 × 0.0250.= 0.00250 mol.The balanced equation is: NaOH(aq) + HCl(aq) → NaCl(aq) + H 2O(l)So the mole ratio NaOH:HCl is 1:1.please explain this question
this is urgent thank u
Answer:
the answer is C which says 1 and 2
3. Which half-reaction equation represents reduction?
Answer:
Which half-reaction equation represents reduction?
answer is 2
Answer:
B CU2+ +2e- -> Cu
Explanation:
reduction means something opposite of the word
reduction means an electron is GAINED in the part before the arrow
it's the " + 2e- " part of the equation before the arrow or "->" part
oxidation is the LOSING of an electron so it would show up to the right of arrow or "->" of the equation as "+2e-"
both reduction & oxidation reactions are called "redox"
in a battery
anode is oxidation
cathode is reduction
anode is positive
cathode is negative electrode
decomposing compounds is electrolysis.
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Which reactant controls the amount of product formed?.
Answer:
limiting reactant gives ................
Answer:
Limiting Reagent or Limiting Reactant
Explanation:
The limiting reagent of a reaction is the reactant that runs out first. Once it is completely consumed, the reaction stops.The limiting reagent is the only chemical that is used to calculate the theoretical yield. It is used up first. After that, any excess reagent will not be able to produce more products.And to assess which reactant is which, we must usually have quantities of each reagent in a chemical reaction...and of course we should write a stoichiometric equation that is balanced with respect to mass and charge in order to assess the stoichiometric equivalence.
We could examine for instance, the combustion of methane gas, the which MAY have cooked your dinner … its combustion reaction is as shown...
[tex]CH_4(g) + 2O_2(g) rarr CO_2(g) + 2H_2O(g) + Delta[/tex]
And here conditions of COMPLETE combustion pertain; there is DIOXYGEN in excess, AND methane is the limiting reagent. A [tex]10*g[/tex] mass of methane represents a molar quantity of …
[tex](10.0*g)/(16.01*g*mol^-1)=0.623*mol[/tex]
And with respect to dioxygen we thus require...
[tex]0.623*mol*32.00*g*mol^-1=40*g[/tex]
...but this quantity (AND MORE) is available from the atmosphere....and the methane was the limiting reagent....
nuclear reactions take place where?
a) ring of electrons, b) the entire atom, c) nucleus, d) none of these
The most effective ways to increase the rate of a reaction are to
Answer:
Use a catalyst, use more reactants, have a larger reactant surface area, more pressure, higher temperature.
Explanation:
When auger is dissolved in heated water ___ is the solvent and ___ is the solute? A heat, water b water, heat c water, sugar d sugar, water
Answer C
Explanation: the solute will be sugar and the solvent will be water :)
How many grams of C8H18
is in 405,576.398 mL
[tex]Molarity X \frac{0.762 mol}{05.576398 L} = Mass[/tex] is the of [tex]C_8H_1_8[/tex] is in 405,576.398 mL.
What is molarity?Molarity (M) is the amount of a substance in a certain volume of solution. Molarity is defined as the moles of a solute per litres of a solution. Molarity is also known as the molar concentration of a solution.
Given data:
Molar mass of [tex]C_8H_1_8[/tex] = 0.762 mol
Volume of solution = 405,576.398 mL = 405,576.398 mL/1000 = 405.576398 L
Solution:
Step 1: Calculating moles of [tex]C_8H_1_8[/tex]
• Molarity =[tex]\frac{\;Moles \;of \;solute}{\;Volume \;of \;solution \;in \;litre}[/tex]
• Putting the value in the given formula
• Moles of solute C8H18 = [tex]\frac{\;Mass}{\;Molar \;molar \;mass}[/tex]
• Moles of solute C8H18 = [tex]\frac{\;Mass}{0.762 mol}[/tex]
Now,
Molarity =[tex]\frac{\;Moles \;of \;solute}{\;Volume \;of \;solution \;in \;litre}[/tex]
Molarity =[tex]\frac{\frac{\;Mass}{0.762 mol}}{\;Volume \;of \;solution \;in \;litre}[/tex]
Molarity =[tex]\frac{\frac{\;Mass}{0.762 mol}}{405.576398 L}[/tex]
[tex]Molarity X \frac{0.762 mol}{05.576398 L} = Mass[/tex]
Hence, [tex]Molarity X \frac{0.762 mol}{05.576398 L} = Mass[/tex] is the of [tex]C_8H_1_8[/tex] is in 405,576.398 mL.
Learn more about molarity here:
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4. Who has the most sensitive taste buds?
adults
babies
teenagers
the elderly
Answer:
Taste bufs
Explanation:
May be teenager or adult is the most probable answer because teenager and adult are fully developed species of human so they can have most sensitive taste bud
PLEASE MARK ME BRAINLIEST IF MY ANSWER IS CORRECT
Which statement describes what happens when somebody slaps their hand on a wall?
Answer:
B. Wall applies equal reaction force on hand
Explanation:
This is newton's third law. You push something, that something pushes you back with same force. The direction is opposite, so if I push a wall, the wall pushes me back with same force just in opposite direction (so wall towards me). This is why option A is incorrect b/c it says force in same direction as wall. C and D talk about unequal force which is incorrect.
Answer:Wall applies equal reaction force on hand
Explanation:
How many grams of BaCl2 are required to make 1.50L of a 0.60M solution?
Answer:
187.407g
Explanation:
Moles of solute = Molarity × Liters of solution
Multiply 0.60 M by 1.50L:
0.60 mol/ 1L×1.50L=0.9 mol
To obtain the mass of solute, we will need to the molar mass of BaCl2, which is 208.23g/mol:
Finally, multiply the number of moles by208.23g /mol
0.9mol×208.23g/1mol =187.407g
Boom, you have a mass of:
187.407g
Which equation shows a physical change?
A-Pb(NO3)2 (aq) + 2KI(aq) → 2KNO3(aq) + PbI2(s)
B-2H2O(l) → 2H2(g) + O2(g)
C-H2O(g) → H2O(s)
D-HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l)
Answer:
C
water has undergone a phase change and the composition of a substance was not changed
What will most likely happen when stress is applied to an equilibrium reaction?
A) The system will not respond to the stress.
B) The system will use catalysts to change its equilibrium.
C) The equilibrium position will shift to increase the applied stress.
D) The system will change its concentration to shift to a new equilibrium position.
Answer:
option D is the correct answer of this question.
When stress is applied to an equilibrium reaction then the system will change its concentration to shift to a new equilibrium position.
So, the correct option is D.
What is equilibrium ?The stage at which the rate of formation of reaction is equal to rate of backward reaction in an reversible reaction is called equilibrium.
The reaction in such stage occur is called equilibrium reaction.
Factors affecting equilibrium reaction.There are some factors which affects the equilibrium.
Pressure : On increasing pressure of the gas present in reactant side shift the reaction to forward direction.Concentration : As concentration of the reactant increases then the reaction shifts in forward direction and as concentration of product is increases then the reaction moves in backward directionTemperatureNumber of moles.learn about equilibrium
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What is the expansion for the chemical symbol of tungsten?.
What happens during stage 3 of cold water immersion.
Answer:
Stage 3 or long-term immersion hypothermia happens after 30 minutes or more. Cold water pulls heat from the body, and the body’s core temperature drops. This eventually leads to loss of consciousness and death.
Which shows an isomer of the molecule below?
The isomer of the molecule in the depicted image would be A.
What are isomers?Isomers are molecules with the same chemical formula but different arrangements of their component atoms. Isomers also have different properties.
The original molecule in the image has a triple bond with 4 carbon atoms. Thus, its isomers must also have a triple bond with 4 carbon atoms.
The only option with a triple bond and 4 carbon atoms in the image is option A.
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HELP QUICKLY PLEASEEE
Bromine is a chemical element with the symbol Br and atomic number 35. It is the third-lightest halogen and is a volatile red-brown liquid at room temperature that evaporates readily to form a similarly coloured vapour.
Answer:
Bromine is a nonmetal in group 7 or group 17, known as the halogens. It has 7 valence electrons.
So the correct answer is "nonmetal, 7 valence electrons"
I NEED HELP ASAP!!!!!!!!!!!
WITHIN THE HOUR
Thanks
Answer:
C
Explanation:
Actually, arranged to the size of smallest to least atom radius size = C
Atomic sizes generally get smaller as you go from L to R across a row of the periodic table.
What pressure, in atm, is required to reduce 60.0 mL of a gas at standard conditions to
10.0 mL at a temperature of 25.0 °C?
Key Concepts
Identify the choice that best completes the statement or answers the question.
13. Basalt is a gray or black igneous rock. Pilar uses an absolute dating method to study a sample of basalt. What will the method help her learn about the basalt sample?
F the age of the sample
G the composition of the sample
H the physical structure of the sample
I the geographic distribution of the sample
Answer:
Explanation:
Answer
It tells you what method she used and what she wanted to accomplish. She is using
an absolute dating method to study a sample of basalt
So the answer you should post is F. F and the quotation above say the same thing.
Which compound could serve as a reactant in a neutralization reaction?.
Answer:
In this type of neutralization reaction, the acids and bases are the reactants, since they are the materials that will react to form a new solution. The products are water and salt since they have been created following the reaction.
Explanation:
Neutralization occurs when a strong acid and a strong base come together in a chemical reaction to form water and salt.
In chemistry, acids and bases are measured on the pH scale, which ranges from 0 to 14. Pure water sits in the middle, at a neutral 7. Anything below 7 is an acid, and anything above 7 is a base. Often, solutions are either too acidic or too basic, so a reaction must take place in order to achieve neutralization.
That neutralization leads to the formation of water and salt. In chemistry, salt doesn’t necessarily just mean table salt. It is also a broader term that categorizes the compound that is created in the reaction between an acid and a base.