Answer:
Endothermic Reaction:
These type of reactions are those reactions which absorb energy from the surroundings to form products. They also create a cooling effect in the surrounding as they absorb heat and thus the surrounding area gets cooled.
Exothermic Reaction:
These are reactions that release energy, mostly in the form of heat or light.
The products will release energy there can be a heating effect in the surroundings.
If the temperature of 96.5 g of water increases from 25.2 YC to 37.6 YC, how much heat did the water absorb?
Answer:
Q = 5,006.6 J
Explanation:
Hello there!
In this case, for these calorimetry problems, it is possible for us to compute the heat absorbed or released by a substance by considering the involved mass, specific heat and temperature change:
[tex]Q=mC(T_2-T_1)[/tex]
Thus, since the mass of water is 96.5 g, its specific heat is widely known as 4.184 J/g°C and the temperature increases, the resulting heat turns out to be:
[tex]Q=96.5g*4.184\frac{J}{g\°C} (37.6\°C-25.2\°C)\\\\Q=5,006.6J[/tex]
Best regards!
The given values are:
Temperature,
[tex]T_1 = 25^{\circ} C[/tex][tex]T_2 = 37.6^{\circ} C[/tex]then,
[tex]\Delta T = T_2-T_1[/tex][tex]= 37.6-25.2[/tex]
[tex]= 12.4^{\circ} C[/tex]
Mass,
[tex]m = 96.5 \ g[/tex]As we know the formula,
→ [tex]Q = mC\Delta T[/tex]
By substituting the values, we get
[tex]= 96.5\times 4.184\times 12.4[/tex]
[tex]= 5006.6 \ J[/tex] (required heat)
Thus the response above is right.
Learn more about heat here:
https://brainly.com/question/15334876
Please..................
Sorry so what I think u should do is ask your teach or look up on how to do this problem
Fill in the blanks 2. A forest is a purtier of- and following
Answer:
Odors and pollutant gases
Explanation:
how many mole of diphosphorus pentoxide are represented by 2.63×10²⁶ molecules
Answer:
436.88 moles of P₄O₁₀
Explanation:
From the question given above, the following data were obtained:
Number of molecules of P₄O₁₀ = 2.63×10²⁶ molecules
Number of mole of P₄O₁₀ =?
From Avogadro's hypothesis,
6.02×10²³ molecules = 1 mole of P₄O₁₀
Therefore,
2.63×10²⁶ molecules = 2.63×10²⁶/6.02×10²³
2.63×10²⁶ molecules = 436.88 moles of P₄O₁₀
Thus, 436.88 moles of P₄O₁₀ are present in 2.63×10²⁶ molecules.
Set of degenerate orbital in germanium
Answer:
Which set of orbitals are degenerate?
Degenerate is used in quantum mechanics to mean 'of equal energy. ' It usually refers to electron energy levels or sublevels. For example, orbitals in the 2p sublevel are degenerate - in other words the 2px, 2py, and 2pz orbitals are equal in energy, as shown in the diagram.
Explanation:
Answer:
Electron orbitals having the same energy levels are called degenerate orbitals, For example, orbitals in the 2p sublevel are degenerate - in other words the 2px, 2py, and 2pz orbitals are equal in energy.
Rotation: Choose ALL that are TRUE (15 points for you, Sorry I can't find the answer to it..)
Question 2 options:
Earth spins on its axis and has no tilt.
A day on a planet is the time it takes the planet to complete one rotation on its axis
A year on a planet is the time it takes the planet to complete one rotation on its axis
Earth spins on its axis at a 23.5 degree tilt
A day on a planet is the time it takes the planet to complete one rotation on its axis and Earth spins on its axis at a 23.5 degree tilt are the true statements.
What is rotation?Rotation is a process in which any body show movement of 360 degree at their own place.
Earth do rotation at its own place all the time with little tilt position of 23.5 degree and due to this day and night occurs in the earth. And earth do revolution in 365 days around the sun in the orbital and due to this movement different seasons occur in the earth.
Hence, option (2) & (4) is correct, i.e. Earth spins on its axis at a 23.5 degree tilt and a day on a planet is the time it takes the planet to complete one rotation on its axis.
To know more about rotation, visit the below link:
https://brainly.com/question/15734021
Hydrochloric acid reacts with sodium hydroxide to form water and sodium chloride. Hydrochloric acid is an extremely acidic, clear, corrosive liquid. Sodium hydroxide is a very basic white solid.
What can be known about the reactants of this reaction?
They will be clear.
They will not have the properties of sodium hydroxide or hydrochloric acid.
They will be corrosive.
They will have the properties of sodium hydroxide or hydrochloric acid.
The answer is C.
You're welcome!
2. Sate the method of collecting gases that are
ii). Lighter than ai
i). denser than air
Answer:
i) Upwards delivery
ii) Downwards delivery
Explanation:
The methods used in the collection of gases are quite different depending on the state of the gas. The solubility and density of gases are the factors that determine the method of collection to be used.
Upwards delivery is used to collect gases that are soluble in water and lighter compared to air. Examples of these kind of gases include; Cl2 and SO2
Downwards delivery is used to collect gases that are soluble in water and denser than air. An example of this kind of gas is ammonia gas, NH4.
D » » DI
Which applies to fusion? Check all that apply.
involves the splitting of nuclei
takes place in the Sun
releaſes radiation as a waste product
occurs in nuclear power plants and is used to generate electricity
plays a role in the production of essentially all elements heavier than helium
releases large amounts of energy
I’m looking for fusion not fission
Answer:
The correct answer is -
takes place in the Sun
plays a role in the production of essentially all elements heavier than helium
releases large amounts of energy
Explanation:
Fusion reaction takes place when two or more small atomic nuclei come in close proximation for a longer time so the nuclear force pulling them together and form into heavier molecules than helium and releases a huge amount of energy by this process.
A great example of this fusion reaction is the sun where nuclear fusion takes place inside the core of the sun and result in a huge amount of release as it is an exothermic reaction.
Answer:
2, 5, 6Explanation
EDGE2021
How many moles of Ca(NO3)2 must be added to 1.0 L of a 0.255 M HF solution to begin precipitation of CaF2(s)
Answer:
6.1×10^(-10) mol
Explanation:
CaF2(s) -----------> Ca2+(aq) +2F-(aq)
Ksp = [Ca2+][F-]^2
Given data
[F-] = 0.255 M
∴ The concentration of Ca2+required to start the precipitation
[Ca2+] = Ksp / [F-]2
= (4.0 X 10^-11) /(0.255)^2
= 6.1×10^(-10) M
Here the volume is 1.0 L
∴ The number of molesof Ca(NO3)2 must be added to 1.0 L of a1.0 L of a 0.255 M HF solution to begin precipitation ofCaF2 (s)= 6.1×10^(-10) mol
What gas is used and what is released
a.carbon dioxide / oxygen
b.Oxygen/carbon dioxide
c.Carbon dioxide/helium
d.oxygen/calcium
Answer:
if i got it right i think it woud be a
Changing the size and shapes of wood would be a chemical change.
O True
O False
Answer:
False.
Explanation:
False because there's no chemicals making change. its a physical change
How many moles is 8.42 x 10^22 representative particles of iron (III) oxide?
Answer:
1 Mole = 602 billion trillion. 602,000,000,000,000,000,000,000; 6.02 X 1023 (this is known as Avogadro's number) ... 1 mole of H2O= about 1/3 of a cup (18 mL). It is helpful in ... x 1023 particles. Note: Particles could refer to atoms, molecules, formula units ... How many moles of Sulfur (S) are in 1.8 x 10 24 atoms of sulfur ?
Explanation:
4. "Metals are conductor of electricity"prove
Answer:
Hey mate.......
Explanation:
This is ur answer......
Metals are an excellent conductor of electricity and heat because the atoms in the metals form a matrix through which outer electrons can move freely. Instead of orbiting their respective atoms, they form a sea of electrons that surround the positive nuclei of the interacting metal ions.
Hope it helps!
mark me brainliest pls......
Follow me! :)
Which of the following has the lowest entropy?
O A. Water solution
B. Water vapor
C. Ice
D. Water
Water
Answer: Ice
Explanation:
Answer:
the answer is B.
Explanation:
Because unlike the closed system, in which the entropic process cannot stop itself
During the rock cycle, which of the following types of materials forms as a result of weathering and erosion of rock?
10 gram sample of methane (CH 4 ) has the same number of molecules as 10 gram sample of O 2
The given question is incomplete. The complete question is:
10 gram sample of methane [tex](CH_4)[/tex] has the same number of molecules as 10 gram sample of [tex]O_2[/tex]. True or False
Answer: Thus the statement is False.
Explanation:
According to avogadro's law, 1 mole of every substance contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar Mass}}[/tex]
1. [tex]\text{Number of moles for methane}=\frac{10g}{16g/mol}=0.625moles[/tex]
Now 1 mole of [tex]CH_4[/tex] molecule contains = [tex]6.023\times 10^{23}[/tex] of molecules
0.625 mole of [tex]CH_4[/tex] molecule contains = [tex]\frac{6.023\times 10^{23}}{1}\times 0.625=3.76\times 10^{23}[/tex] molecules
2. [tex]\text{Number of moles for oxygen}=\frac{10g}{32g/mol}=0.3125moles[/tex]
Now 1 mole of [tex]O_2[/tex] molecule contains = [tex]6.023\times 10^{23}[/tex] of molecules
0.3125 mole of [tex]O_2[/tex] molecule contains = [tex]\frac{6.023\times 10^{23}}{1}\times 0.3125=1.88\times 10^{23}[/tex] molecules
The number of molecules are different.
How many moles of gas are present at a pressure of 1.00 atm in a container that is 4.0 liters in a room that is 25°C?
A) 0.013 mol
B) 1.9 mol
C) 0.16 mol
D) 6.1 mol
One mole of gas is in a 2.0 L container at 1.0 atm pressure and 20°C. If the volume is doubled, and the temperature remains constant, what will happen to the pressure?
A) The pressure will quadruple.
B) The pressure will double.
C) The pressure will decrease by half. D) The pressure will decrease by one-quarter.
Answer:
A) 0.013 mol
Explanation:
B) The pressure will double.
TRUE OR FALSE! Please help
All of the following are solutions except?
a.wine
b.fruitcake
c.a ruby
d.a brass penny
Answer:
fruit cake is the right ans
Answer:
Heyy mate
Explanation:
fruit cake is the correct answer
Hope it helps
I bet no one can solve this question......
Answer:
Equilibrium is shifted to left.
Increase in temperature favours the endothermic reaction. In the given reaction, the backward reaction is an endothermic reaction. So the backward reaction is favoured, so the equilibrium shifts towards left.
True or false sodium chloride is an organic molecule
GIVING 500 PTS Question 17 (1 point)
Chemical energy can be transformed into mechanical energy in a fan. However, what is the step that is missing from the diagram that shows how this transformation works?
Question 17 options:
magnetic energy
transformational energy
electrical energy
heat energy
Question 18 (1 point)
What is the difference between a generator and a motor?
Question 18 options:
A generator converts mechanical energy into electrical energy and a motor converts electrical energy into mechanical energy.
A generator converts electrical energy into mechanical energy and a motor converts mechanical energy into electrical energy.
A generator converts kinetic energy into mechanical energy and a motor converts mechanical energy into kinetic energy.
A generator converts potential energy into electrical energy and a motor converts electrical energy into potential energy.
Question 19 (1 point)
Which of these is an example of convection?
Question 19 options:
an egg boiling in water
an egg frying in a pan
an egg exposed to a flame
an egg warming under a light
Question 20 (1 point)
A rainstorm occurs on a hillside. Within hours, much of the water flows into a lake at the bottom of the hill. What will most likely happen to the rest of the water?
Question 20 options:
It will change into dew on plants along the hill.
It will become part of the groundwater flow.
It will form a cloud above the hill.
It will change from water into air.
Question 21 (1 point)
What is the Coriolis Effect?
Question 21 options:
the circulation route of trade winds moving from east to west
the way that tropical winds circulate to form hurricanes and large storms
the rapid movement of winds found in the upper atmosphere
he curved path of global winds due to the rotation of Earth
Question 22 (1 point)
Based on the weather map above, which statement is true based on the weather map?
Question 22 options:
A warm front is moving towards South Carolina bring rainy conditions.
A cold front just passed through South Carolina bringing cooler temperatures.
A warm front just passed through South Carolina bringing warmer temperatures.
A stationary front is moving towards South Carolina bringing long periods of rain.
Question 23 (1 point)
Which type of local wind is shown below and what causes this type of wind?
Question 23 options:
At night, cooler air over land replaces rising warmer air over water causing a land breeze.
At night cooler air over water replaces rising warmer air over land causing a land breeze.
During the day, cooler air over land forces warmer air over water to rise causing a sea breeze.
Question 24 (1 point)
An air mass, shown in the image below, that forms over parts of Mexico, Texas, and Arizona will be a _______.
Question 24 options:
continental polar air mass
continental tropical air mass
maritime polar air mass
maritime tropical air mass
Question 25 (1 point)
Which of these plants do not have special tissues to deliver food and water to its cells?
Question 25 options:
Maple
Dogwood
Tomato
Liverwort
Question 26 (1 point)
Where are the female reproductive organs of a flower found?
Question 26 options:
in the stamen
in the roots
in the pistil
in the petals
Question 27 (1 point)
What path do sperm cells take to get to egg cells during fertilization of a flowering plant?
Question 27 options:
Pollen lands on the stigma; pollen grain grows a tube down the style to an ovule; and fertilization occurs.
Pollen lands on an anther; grows a tube to the filament; and fertilization occurs.
Pollen lands on the stigma and fertilization of the stigma occurs.
Pollen lands on a newly formed seed and fertilization occurs.
Question 28 (1 point)
A green plant must be able to perform three different processes in order to survive. What are they?
Question 28 options:
respiration, perspiration, photosynthesis
transpiration, respiration, photosynthesis
chlorophyll, photosynthesis, perspiration
transcription, photosynthesis, chloroplast
Question 29 (1 point)
Which statement is a correct description of the processes of respiration and transpiration in a plant?
Question 29 options:
Transpiration is when the plant loses water through its leaves. Respiration is when the plant breaks down the sugar in its cells to release energy.
Transpiration is when the plant pulls water into its roots. Respiration is when the plant breathes.
Transpiration is when the plant grows over time. Respiration is when the plant breaks down the sugar in its roots.
Transpiration is when the plant produces buds. Respiration is when the plant dies.
Question 30 (1 point)
Which equation correctly describes photosynthesis?
Question 30 options:
water + sugar + oxygen → carbon dioxide + chlorophyll
sunlight + water + carbon dioxide → oxygen + sugar
sunlight + sugar → water + oxygen
carbon dioxide + oxygen → water + sugar + sunlight
Answer:
17. transformational energy
Water vapor also enters the atmosphere through —————(2 words), which takes place in many cells and produces water and carbon dioxide.
Answer:
It is photosynthesis and transpiration
hope it helps
g At the start of an experiment, there are 0.200 mol of reactant and 0 mol of product in the reaction vessel. After 25 min, 0.111 mol of reactant (CH3NC) remain. There are ________ mol of product (CH3CN) in the reaction vessel. At the start of an experiment, there are 0.200 of reactant and 0 of product in the reaction vessel. After 25 , 0.111 of reactant remain. There are ________ of product in the reaction vessel. 0.022 0.089 0.311 0.111 0.200
Answer: b. 0.089
Explanation: The Law of Conservation of Mass states that when in a chemical or physical change, the products' mass of a chemical reaction will equal to the mass of the reactants' mass or in other words, mass cannot be created or destroyed.
The same can be said to moles, since, they are also measures of mass.
In the reaction:
[tex]CH_{3}CN_{(g)} \rightarrow CH_{3}NC_{(g)}[/tex]
initially there were 0.200 mol of reactant. After 25 min, there are 0.111 mol left.
This means that 0.089 mol of reactant "transformed" into product.
Therefore, in the reaction vessel, there are 0.089 mol of product.
determine the number of grams of carbon 3.14x 1023 atoms of carbon
6.26 g C
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableMolesAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[Given] 3.14 × 10²³ atoms C
[Solve] grams C
Step 2: Identify Conversions
Avogadro's Number
[PT] Molar Mass of C - 12.01 g/mol
Step 3: Convert
[DA] Set up: [tex]\displaystyle 3.14 \cdot 10^{23} \ atoms \ C(\frac{1 \ mol \ C}{6.022 \cdot 10^{23} \ atoms \ C})(\frac{12.01 \ g \ C}{1 \ mol \ C})[/tex][DA] Multiply/Divide [Cancel out units]: [tex]\displaystyle 6.26227 \ g \ C[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
6.26227 g C ≈ 6.26 g C
Which statement is correct for a plant cell?
O A plant cell membrane forms a thick wall.
O A plant cell does not have a cell membrane,
O The cell membrane is inside the cell wall,
O The cell membrane is outside the cell wall,
Answer:
The cell membrane is inside the cell wall
Explanation:
1. What are the two properties a force have that make
it a vector quantity? (Identify the force )
Answer:
magnitude and direction
Helppppp pleaseeee xx
Answer:
2.5 moles of O₂ = 5 moles of H₂O
Explanation:
The balanced equation for the reaction is given below:
2H₂ + O₂ —> 2H₂O
From the balanced equation above,
1 mole of O₂ reacted to produce 2 moles of H₂O.
Finally, we shall determine the number of mole of H₂O produced by the reaction of 2.5 moles of O₂. This can be obtained as follow:
From the balanced equation above,
1 mole of O₂ reacted to produce 2 moles of H₂O.
Therefore, 2.5 moles of O₂ will react to produce = 2.5 × 2 = 5 moles of H₂O.
Thus,
2.5 moles of O₂ = 5 moles of H₂O
Please help..... :(((
The last part says group 2 if you’re wondering