Answer:
hiroghlipical
Explanation:
new word i just made
1. The heat of combustion is a negative value. Do you think this indicates an exothermic or endothermic reaction? Explain.
Answer:
Exothermic
Explanation:
Combustion reactions are almost always exothermic because it is an oxidation reaction that produces heat and in this case it would be considered to be exothermic but there are few cases in which it would be considered endothermic. Combustion of Nitrogen is endothermic because Δ is positive despite being a combustion reaction.
PLEASE HELP ASAP 30 POINTS!!!!
Voltage ______
Question 1 options:
causes current
pushes free electrons around a circuit
is measured in Volts
all of the choices
what are the only elements that exist in nature as uncombined
Answer:
The noble gases (Argon, Neon, Xenon, Helium, Krypton, Radon)
what is electromagnetisim
Answer:
science of electromagnetic fields
Explanation:
(winks and runs off)
Can someone help me with this chemistry question?
Answer:
B no. is the answer because
Explanation:
acids increase the hydrogen ion concentration, which provides more ionsan acid comes in contact with a metal, the acid steals free electrons away. That loosens the bonds holding metal atoms in place, so the metal dissolves. That's a chemical change, so the ability of acids to dissolve metals is a chemical propertyWhen a strong acid is neutralized by a strong base there are no excess hydrogen ions left in the solution. The solution is said to be neutral as it is neither acidic nor alkaline. The pH of such a solution is close to a value of 7; the exact pH value is dependent on the temperature of the solution.So this can probably be the the answer
Hope my answer helps
Mark me Brainliest （⌒▽⌒）#beyourselfHow much heat is required to change 235 g of iodine at 25 degrees celsius into vapor at 198 degrees celsius? The melting point is 113.5 degrees celsius and the boiling point is 185.4 degrees celsius.
Answer:
koe Pgl smjega but kya karu mods ka acc mil nai raha and acc delete karna h
Review the information from the documents you read for this assignment. Use what you learned to answer the following question. What were the major effects of a dust storm? Give your answer in at least four sentences.
Answer:
what people experienced during a dust storm
how people reacted to a dust storm
what people did after a dust storm
Explanation:
i passed
Answer:
what people experienced during a dust storm
how people reacted to a dust storm
what people did after a dust storm
Explanation:
Which animal resembles their parents already after being born or hatched?
Why was the creation of element 114 so special?
Answer:
It is classified as a metal and is expected to be solid at room temperature.
Explanation:
not sure but i guess it is that
the apparatus in the figure below is used for the electrolysis of water. hydrogen and oxygen gas are collected in the two inverted burets. an inert electrode at the bottom of the left buret is connected to the negative terminal of a 6 v battery, whereas the electrode in the buret on the right is connected to the positive terminal. a small quantity of sodium carbonate is added to speed up the electrolytic reaction.
At the left side; the balanced half equation is:
[tex]\mathbf{2H_2O _{(l)} + 2e^- \to H_{2(g)} + 2OH^{-}_{(aq)}}[/tex]
At the right side, the balanced half equation is:
[tex]\mathbf{4OH^-_{(aq)} \to O_{2(g)} + 2H_2O_{(l)} + 4e^-}[/tex]
The objective of this question is to determine the balanced half-reaction for the electrodes on the left and the right side.
A half-reaction is an oxidation-reduction reaction part of a redox reaction where we make sure both half-reactions are balanced by multiplication of the reactions with appropriate numbers in order to have an equal number of electrons.
According to the given information:
The overall cell reaction can be expressed as:
[tex]\mathbf{H_2O_{(l)} \to H_{2(g)} + \dfrac{1}{2}O_{2(g)}}[/tex]
At the left side; the balanced half equation can be expressed as:
[tex]\mathbf{2H_2O _{(l)} + 2e^- \to H_{2(g)} + 2OH^{-}_{(aq)}}[/tex]
At the right side, the balanced half equation can be expressed as:
[tex]\mathbf{4OH^-_{(aq)} \to O_{2(g)} + 2H_2O_{(l)} + 4e^-}[/tex]
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What is the main piece of evidence supporting the theory of seafloor spreading?
Fossils of plants and animals along the ocean floor
Volcanic activity along the Ring of Fire
Glacial scratches on the seafloor
Alternating magnetic pattern in the rocks of the ocean floor
Answer:
Alternating magnetic pattern in the rocks of the ocean floor
Explanation:
The rocky sea floor on either side of mid-ocean ridges has a matching pattern of magnetic stripes. This information provides evidence for sea-floor spreading. The matching striped pattern shows that Earth’s polarity was recorded on either side of the ridge as lava oozed from the ridge and cooled.
Answer:
Alternating magnetic pattern in the rocks of ocean floor.
Explanation:
The ocean floor consists of several types of rocks.The mid-ocean ridges has a similar pattern as well as magnetic field lines.So this makes a clear evidence.write a ground state electron configuration for each neutral atom
Pb
Sr
U
N
Ag
Ti
Ce
CI
Hg
please help me
Answer:
Pb[lead] [Xe]4f^145d^106s^26p^2
U[uranium] 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6 6s^2 4e^14 5d^10 6p^6
7s^2 5f^4
This notation can be written in core notation or noble gas notation by replacing the
1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6 6s^2 4e^14 5d^10 6p^6
7s^2 5f^4
with the noble gas [Rn].
[Rn]7s25f4
N[nitrogen] The full electron configuration for nitrogen is 1s^2 2s^2 2p^3.
Ti[titanium] Ti2+:[Ar]3d^2
Ti:1s^2 2s^2 2p^6 3s^2 3p^6 3d^2 4s^2
1s^2 2s^2 2p^6 3s^2 3p^5 = 17 electrons
(1) electron gain will result to a
negative charge (−), and
(2) electron loss will result to a positive charge (+),
1s^2 2s^2 2p^6 3s^2 3p^6 = 18 electrons
Hg[mercury] You should then find its atomic number is 80. It has a Xe core, so in shorthand notation, you can include [Xe]instead of
1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^6 4d^10 5s^2 5p^6,
for 54 electrons. For the 6th row of the periodic table, we introduce the 4f orbitals, and proceed to atoms having occupied 5d orbitals. We, as usual, have the ns orbitals, and n=? for the 6th period?
Mercury has a regular electron configuration. It becomes:
[Xe]4f145d106s2
Explanation:
socratic.org helped me! I'm really sorry if this is wrong!
How does the space between particles change as energy is added
what type of bond is between H2?
Explanation:
covalent bond enjoy your anseer
Why must you continue to increase the temperature as you perform distillation ?
Answer:
It is possible to separate several distinct compounds according to their varying volatilities by altering the temperature of the distillation process. A nonvolatile solute, on the other hand, will always remain in the solution if you have a nonvolatile solute in your solution.
Explanation:
Hope it helps:)
Answer:
The reason for this is that the composition of the vapor that is distilling varies continuously during the distillation
what does not happen when the temperature is increased ?
(will mark brainliest if ou give me the right answer!!!!)
You observe your friend rub a balloon on their wool sweater and then stick it to the wall. To investigate, you set up an experiment to test whether other objects will respond in the same way when you rub them against a sweater. What is the test variable in your experiment?
A. The number of times you rubbed the object on the sweater
B. The observation that the object sticks to the wall
C. The sweater you use to rub against the objects
D. The type of objects you are testing in the experiment
Answer:
D
Explanation:
BEcause you are testing which objects will stick. Your control variable will be the sweater. And the number of times you rub the object on the sweter will not make it stick. It will make it stick for a longer period.
Answer:
D. The type of objects you are testing in the experiment
How much is the oxygen valency?
What is the value of c?
56.70
Due to the lack of information provided, the best I can give you is this:
In Chemistry, the letter c most commonly refers to specific heat, which is present in the ratio J/g°C.
Hope it helps :)
During an experiment, a canister filled with hot water was added to a beaker filled with cold water. In which direction did the heat energy move?
A) The heat energy moved from the hot water of the canister into the cold water of the beaker.
B) The heat energy moved from the cold water of the beaker into the hot water of the canister.
Equal amounts of heat energy from each container moved in both directions
D) No heat energy moved, as it all remained in the canister of hot water.
Answer:
A
Explanation:
As per the concept of thermal energy, heat energy will be moved from hot water of canister to cold water of beaker as heat flows from point at high temperature to point at lower temperature.
What is thermal energy?Thermal energy is defined as a type of energy which is contained within a system which is responsible for temperature rise.Heat is a type of thermal energy.It is concerned with the first law of thermodynamics.
Thermal energy arises from friction and drag.It includes the internal energy or enthalpy of a body of matter and radiation.It is related to internal energy and heat .It arises when a substance whose molecules or atoms are vibrating faster.
These vibrating molecules and atoms collide and as a result of which heat is generated in a substance , more the collision of particles , higher is the thermal energy.
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Which over lappings are present in carbon(iv)oxide molecule
Answer:
the double carbon to oxygen bond
How does the heat content of the reaction change in the process of photosynthesis when a glucose molecule is formed?
А. the value of q is negative
B. the value of q is positive
C. the value of q remains constant OD. the value of a decreases
E. the value of q equals zero
Answer:
the value of q is negative
What is the best way to torture an ant
strong salt solution
normal salt wouldnt work becaue unlinke slugs they have a waterproof skin
Which piece of information could a person obtain from a contour map?
1.
the mineral composition of a mountain
2.
the elevation of a mountain
3.
the speed of water flow in a river
4.
the amount of water in a river
Answer:
2. The elevation of a mountain.
Explanation:
Contour maps are only used for elevation
Why did me need to have the same molecules in each bottle? and what would have happened if we didn't use the same molecules?
Background info: We learned about molecules and how when a object is heated the air becomes less dense and the molecules is the opposite since they don't spread out and become more dense. What I mean with this question is in class we experimented by putting a bubble on a bottle and putting it on a hot water, the water made the molecules inside less dense and the bubble went up but when we tried cold water the bubble went down.
Answer:
it's just like doing a test grade on children if you give them different tests they might not come up with the same results, the molecules need to be the same or else the experiment will be even.
Explanation:
whenever water is hot the molecules will bounce really fast in the bottle, whenever water is cold he will go really slow in the bottle
Explain how you can find the number of neutrons in the isotope nitrogen-16
Answer:
9
Explanation:
Nitrogen-16
Atomic number of nitrogen= 7
electrons=7
protons=7
neutrons= ?
Nitrogen-'16'= 16 means the mass
16-7= 9
There are 9 neutrons in Nitrogen-16
If you begin with a saturated solution of sugar dissolved in water, and then you heat the solution, what type of solution will result
After beginning the experiment with a saturated solution, then increasing the heat, we will be left with an unsaturated solution.
To obtain the saturated solution, we must dissolve sugar in the water. We can say that the solution has become saturated when the solution is no longer able to dissolve more sugar. It has reached its capacity for the solute that it can dissolve in these conditions.
However, the temperature of a solution has an effect on the dissolving limit of the solution. That is, when a solution is heated it becomes able to dissolve more solute. Therefore, if we were to heat a saturated solution, it will be able to dissolve more solute and therefore will no longer be at its limit, meaning it is no longer a saturated solution. It has become unsaturated.
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how many electrons can there be in the 2p subshell?
Answer:
6 possible electron can fit into the 2p subshell
What makes plant green ?
How are the life process in a cell controlled?
What gives plants cells their regular shape ?
Where are the fluids stored in the cell?
What important function does the cell membrane do ?
( can someone help me out please )
Answer:
Chlorophyll makes plants green.
Enzymes are responsible for dictating what chemical changes happen and when, so thus they control the life process of the cells in our bodies.
The cell wall is what gives a plant cell it's distinct shape (animal cells don't have cell walls btw).
Intracellular fluid, or cytosol, is the fluids stored in the Intracellular compartment.
The cell membrane is the barrier between everything inside the cell, and everything else outside of it. It protects the contents of the cell from harm and releases toxins and other waste from it. The cell membrane is basically like the gate keeper of the cell.
Explanation:
Hope this helps, I tried :)
What is the average acceleration of the car between 24 and 40 seconds? Include the correct units.
Answer:
16
Explanation:
40 - 24 16