Answers
D. River Spey is 2* warmer that River Canon
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Related Questions
study the graph above. In terms of bond energy, which statement is TRUE regarding the energy involved in breaking and making bonds.
a,b,c, or d?
Answers
The energy taken in to break the bond is greater than the energy released after the bond is made therefore the reaction is endothermic.
A plot of energy against time is called a reaction profile. The hump in the plot is known as the activation energy of the reaction. It stands as the energy barrier between reactants and products.
Looking at the reaction profile as shown, we can see that more energy is taken in to break the bonds than energy that is given out after making the bonds hence the reaction is endothermic.
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Answer:
the answer is c
Explanation:
usa test prep says so!
What is the charge on ion X for Li2 X
Answers
TRUE or FALSE 1. Badminton began in India as a game called poona. 2. The shuttle was then called a bird because it was made from goose feather. 3. Ti jian zi played by throwing up in the air. 4. Racket is made of either metal or synthetic materials. 5. Head, throat, shaft, and handle are the parts of the rackets. 6. Shuttlecock is made up of 16 goose feathers. 7. Forehand, Backhand, and Sidestroke are the three basic skills of Badminton. 8. Backhand is use to depends on the type of shot to be executed. 9. Stroke means to propel with a controlled swinging blow. 10. The whole size of the badminton court has 39 meters.
Answers
Answer:
1.false
2.true
3.true
4.true
5.false
6.false
7.false
8.true
9.false
10.true
Explanation:
I took the test
Which of the following is true about a compound where there is a difference in
electronegativity of the two elements if the formula of the compound is greater than
1.7?
The compound is a binary covalent compound.
The compound is a covalent compound.
The compound is an ionic compound.
The compound is a polyatomic compound.
Answers
Answer:
D BLESSS Y
Explanation:
what is the expected hybridization of the central atom tetrahedral
Answers
Answer:
Tetrahedral molecules are normally spy hybridized.
Explanation:
The Law of Conservation of Energy states that Energy can neither be ____________ nor _____________ but only change from one __________ to another.
Answers
Answer:
Explanation:
The law of conservation of energy states that energy can neither be created nor destroyed but only changed from one form of energy to another.
The law of conservation of energy states that energy can neither be created nor destroyed but changes from one state to another.
What is law of conservation of energy?The law of conservation of energy states that energy can neither be created nor destroyed it can only be converted from one form of energy to another.According to this, the total energy of the system remains constant.
This statement is also a statement of first law of thermodynamics which is based on energy.Conservation of energy is distinct from conservation of mass as mass and energy are directly proportional which is given the equation, E=mc².
Because of law of conservation of energy the perpetual motion of machine cannot exist. This means that no system without an external source of energy can supply unlimited amount of energy to its surroundings.
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Calcium has an electronegativity value of 1.0.
Oxygen has an electronegativity value of 3.5.
What type of bond will form between the two atoms?
Answers
Answer:
ionic bond
Explanation:
Calcium gives its two valence electrons to oxygen and forms an ionic bond with oxygen. An ionic bond formed when one atom transfers one or more electrons from itself to its neighboring atom, and an ionic bond formed between the two atoms of the compound.
________ are neutral particles found in the nucleus of an atom.
Answers
A particular reaction has a DH o value of -164 kJ and DS o of -185 J/K at 298 K. Calculate DG o at 617 K in kJ (with 3 significant digits), assuming that DH o and DS o hardly change with temperature
Answers
Answer:
e
Explanation:
The boiling point of a substance is tested. After 10 tests, the result is given as 37+/−3°C. Which conclusion can be drawn from this result? (1 point)
The scientists do not need to collect more data because they have narrowed down the range of the results.
The scientists should not report these results until they have the exact number.
The actual boiling point is either 34°C or 40°C.
The actual boiling point is probably between 34°C and 40°C.
Answers
Answer:
Explanation:
The actual boiling point is probably between 34C and 40C.
Temperature measures the average kinetic energy of particles of the substances. Therefore, the correct option is option D that is the actual boiling point is probably between 34°C and 40°C.
What is temperature?Temperature is used to measure degree or intensity of heat of a particular substance. Temperature is measured by an instrument called thermometer.
Temperature can be measured in degree Celsius °c, Kelvin k or in Fahrenheit. Temperature is a physical quantity. Heat always flow from higher temperature source to lower temperature source.
We can convert these units of temperature into one another. The relationship between degree Celsius and Fahrenheit can be expressed as:
°C={5(°F-32)}÷9
The actual boiling point is probably between 34°C and 40°C.
Therefore, the correct option is option D.
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HELP ME OUT PLEASE!!!!
Which statement correctly describes one of the changes?
A) Picture I shows a chemical change, because a new substance is formed.
B) Picture Il shows a chemical change, because a new substance is formed.
C) Picture I shows a chemical change, because the same substance changes form,
D) Picture Il shows a chemical change, because the same substance changes form.
Answers
Answer:
Answer D. Picture II shows a chemical change, because the same substance changes form
Explanation:
This is the temperature that water molecules slow down enough to stick to each other and form a solid crystal
Answer:
D Im 90% Sure
Explanation:
If its not right i owe you one I did this one before
What happens to the particles of air inside a ball it warms in the sun?
Answers
Answer:
The particles start moving faster and expand making the ball expand.
Explanation:
Kinetic energy is described as - The answers are stored energy - destroyed energy movement or created energy if you answer the question I will give you the brainiest.
Answers
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GIVING BRAINLY AND 20 POINTS
A sound wave in air has the wavelength of 1.36 m. Calculate its frequency? Assume the speed is 340 m/s.
Answers
Explanation:
frequency= velocity/ wavelength
= 340/1.36
=250
Which of the following is a way to increase pressure on a gas?
Answers
Answer:
increase the number of gas particles
Explanation:
1.An object that produces electrical energy through redox reactions is called ____________.
oxidation
reduction
galvanic/voltaic cell
2.Which species undergoes oxidation?
Pb
Cu
Answers
[tex] \huge \bf༆ Answer ༄[/tex]
Question : - 1
An object that produces electrical energy through redox reactions is called Galvanic cell
Question : - 2
Pb undergoes Oxidation
[tex]꧁ \: \large \frak{Eternal \: Being } \: ꧂[/tex]
describe radioisotope
Answers
Answer:
It is an unstable form of a chemical element that releases radiation as it breaks down and becomes more stable.
Which part of the cell controls many functions of the cell and stores DNA?
A) The nucleolus
B) Chromosomes
C) Lysosomes
D) Chromatin
Answers
Answer:
The Nucleus...
it perform many activities and stores DNA in a cell.
Which sentence best describes what happens during a change of state from
a solid to a liquid?
A. The temperature stays the same and the particle speed increases.
B. The temperature stays the same and the particle speed stays
constant
C. The temperature increases and the particle speed stays constant.
D. The temperature decreases and the particle speed decreases.
SUBMIT
Answers
Answer:
B
Explanation:
as temperature rises, the particles gain kinetic energy (they will move faster) so if temperatures stays constant, so will the movement or vibration of the particles
All of the following are properties of molecular compounds except
O A A crystal structure,
O B. low melting points.
C. bonds formed through shared electrons,
D. the inability to conduct electric current when melted or dissolved in water,
Answers
Answer: the answer is c.
Explanation:
i juss guessed and it was right?
Which statement best describes a mechanical wave?
Answers
Answer:
A mechanical wave is a wave that is an oscillation of matter, and therefore transfers energy through a medium.
Explanation:
While waves can move over long distances, the movement of the medium of transmission—the material—is limited. Therefore, the oscillating material does not move far from its initial equilibrium position.
--------------
hope this helped!
✼-answers by brookeangelx
The wave transmits energy from one point to another in the form of signals. Some waves require a medium for propagation while some others does not require a medium for the propagation.
What is a mechanical wave?The mechanical wave is defined as the wave which involves the oscillation of matter and it is responsible for the transfer of energy through a medium. These types of waves does not need a medium for propagation.
The mechanical waves cannot travel through vacuum. Some of the examples of mechanical waves are sound waves, water waves, seismic waves, etc. These waves are not capable of transmitting its energy through a vacuum.
The sound wave is a mechanical wave and the medium which it propagates can be solid, liquid or gas. It can travel fastest in solids and slower in gases.
Thus mechanical wave is an oscillation of matter.
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Oxidation Unit Test
Use the galvanic cell reaction to answer the question.
2Cr(s) + 3Cu2+(aq) → 2Cr3+ (aq) + 3Cu(s)
Which half reaction occurs at the cathode?
(1 point)
Answers
The reduction half equation of the galvanic cell is is; 3Cu2+(aq) + 3e ------> 3Cu(s).
A galvanic cell is a cell that produces chemical energy by a spontaneous chemical reaction. The equation of the reaction is; 2Cr(s) + 3Cu2+(aq) → 2Cr3+ (aq) + 3Cu(s). We can see that chromium was oxidized and copper was reduced.
Since reduction occurs at the cathode, it follows that the reduction half equation is; 3Cu2+(aq) + 3e ------> 3Cu(s).
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which of the following are compounds (select all that apply)
a) Br2
b)NO2
c) KBr
d) Fe
Answers
Answer:
KNO2, KBr
Explanation:
Chemical compounds are any substance composed of identical molecules consisting of atoms of two or more chemical elements. So NO2 and KBr are compounds, Br2 and Fe are not.
A 14.0 L container at 323 K holds a mixture of two gases with a total pressure of 8.00 atm. If there are 1.50 mol of Gas A in the mixture, how many moles of Gas B are present
Answers
The number of moles of gas B present in the gas mixture is 2.72 moles.
The given parameters;
Volume of the gases, V = 14 LTemperature of the gases, T = 323 KTotal pressure of the gases, P = 8 atmNumber of moles of gas A = 1.5 molesThe total number of moles of the gases is calculated by applying ideal gas law;
PV = nRT
where;
R is ideal gas constant = 0.0821 L.atm./mol.K
n is the total mole of the gases
[tex]n =\frac{PV}{RT} \\\\n = \frac{8 \times 14}{0.0821 \times 323} \\\\n = 4.22 \ moles[/tex]
The number of moles of gas B is calculated as follows;
[tex]n_B = 4.22 - n_A\\\\n_B = 4.22 - 1.5\\\\n_B = 2.72 \ moles[/tex]
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2. What pressure is required to compress 196.0 L of air at 1.00 atmosphere into a cylinder
whose volume is 26 0 L? (2 points)
Answers
Answer:
7.54 atmExplanation:
The required pressure can be found by using the formula for Boyle's law which is
[tex]P_2 = \frac{P_1V_1}{V_2} \\[/tex]
where
P1 is the initial pressure
P2 is the final pressure
V1 is the initial volume
V2 is the final volume
From the question we have
[tex]P_2 = \frac{1 \times 196}{26} = \frac{196}{26} \\ = 7.538461...[/tex]
We have the final answer as
7.54 atmHope this helps you
When the following equation is balanced, the coefficients are ________.
NH3 (g) + O2 (g) ---> NO2 (g) + H2O (g)
a. 1,1,1,1
b. 4,7,4,6
c. 2,3,2,3
d. 1,3,1,2
e. 4,3,4,3
Answers
Answer:
B
Explanation:
Option B is the correct answer. When you add 7 in front of the O2 in the left side, and then you add 4 and 6 in front of NO2 and H2O respectively, the number of oxygen atoms is the same in both sides.
Where did the atoms come from in the first place?
Answers
Answer:
All the carbon atoms in the human body were created in the stars. Elementary particles, such as protons, were formed during the "big bang"; that amazing moment about 14 billion years ago in which the universe got it's start.
CALCULATE the no of atoms in 0.6g of Ca ?
Answers
Explanation:
CALCULATE the no of atoms in 0.6g of Ca ?
Answer:
Explanation:
Every periodic table is rounded differently. My numbers will be approximate.
mols = 0.6 grams/ 40 grams / mol 40 is the number you need to get from the periodic table.
mols = 0.015
1 mol of anything is 6.02 * 10^23
So the formula you should use is atoms = 0.015 * 6.02 * 10^23
Answer: 9.03 * 10^21
Which choice is an element? Question 2 options: air (N2 mixed with O2 , and CO2 ) sodium chloride (NaCl) oxygen (O2 ) water (H2O )
Answers
Answer:
oxygen (O2 )
Explanation:
During __________ reproduction, an identical copy of the parent is produced.
Answers
Answer:
During __asexual________ reproduction, an identical copy of the parent is produced.