Answer:
Solid matter is composed of tightly packed particles. A solid will retain its shape; the particles are not free to move around. Liquid matter is made of more loosely packed particles. ... Gaseous matter is composed of particles packed so loosely that it has neither a defined shape nor a defined volume.\
Answer:
if they are more stable and more still they are solid if they are slitly agitated and move around more then it's a liquid but if they are completely moving fast without any hesitation then it's a gas.
The process by which particles in a solution spread out evenly is called?
Answer:
this is your answer.....
(b) Two containers made of Insulating material contain the same volume of water at roorh
temperature. The containers do not have lids. The volume of liquid in each container graduall- decreases.
(i) After a certain time, the temperature of the water has decreased to below room
temperature.
Explain, in terms of molecules, why the temperature has decreased.
(ii) One of the containers is wide and shallow. The other container is narrow and deep.
Predict which container has the greater rate of cooling. Explain your answer.
Answer:
See Explanation
Explanation:
Evaporation is an endothermic process, an endothermic process is one in which energy is absorbed from the surrounding thereby making the system to be at a lower temperature compared to the environment.
Being an exothermic process, molecules take away energy from the liquid surface as they escape from the liquid surface hence, evaporation causes the temperature of the water to be decreased below room temperature.
The rate of evaporation and cooling depends on the surface area of liquid. The liquid in the wide and shallow container has a greater rate of cooling because it has a greater surface area than the liquid in the narrow and deep container.
How much NaNO3 can dissolve at 70°C in 100g of water?
What can the rock layers tell us about life on Earth?
Explanation:
The location of fossils in rock layers provides evidence of Earth's past landscapes. ... Scientists use a technique called radiocarbon dating to find out the age of the fossils. Once they know the age of the fossil in the rock, they also know that rock itself is about the same age!
Which of the following naming systems would you use to nameH2SO4?
Question 7 options:
a)
________________IC ACID
b)
HYDROGEN _________IDE
c)
________________OUS ACID
d)
HYDRO________IC ACID
Answer:
A
Explanation:
H2SO4 name is Sulfuric Acid. I hoped that helped !
Determine the percent composition of Lithium in Li3PO3 (lower case BOTH 3)
Your answer:
A. 20.866%
B. 31.037%
C. 48.097%
D. 10.080%
Answer:
A. 20.866%
Explanation:
First, we calculate molar mass of Li3PO3
Molar mass of Li3PO3 = 6.9 (3) + 31 + 16(3)
= 20.7 + 31 + 48
= 99.7g/mol
To calculate the percent composition of Lithium, we say:
Mass of lithium in compound/mass of compound × 100
% composition = 20.7/99.7 × 100
= 0.208 × 100
= 20.8%.
Al(s) + HCl(aq)-AlCl3(aq) + H2(g)
what are the products of this reaction
Describe how plants and animals may change their characteristics in order to adapt to changes in their environment
please!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
One way an animal may adapt to the environment and change characteristics is for example lizards. Lizards are preyed on by birds and other small mammmals. To avoid this some lizards have adapted to color changes or camofaluge.
Explanation:
Answer:
take a octopus for example, they change thw color of their skin to match their environment to stay hidden.
Explanation:
or take a decomposing plant for example, they mimik the process of decomposing to draw animals away
A solute dissolved in water will cause
A the boiling point to increase
B the freezing point to increase
C the melting point to increase
D the boling point to decrease
(It’s A)
Answer:
A the boiling point to increase
Explanation:
That is a colligative property
Arrange ionic compounds in order of decreasing amount of energy released in lattice formation .NaF,MgS,TLN and
The question is incomplete, the complete question is;
Arrange the following ionic compounds in order of decreasing amount of energy released in lattice formation: NaF, MgS, TlN, and CsI.
Answer:
TlN> MgS > NaF > CsI
Explanation:
Recall that lattice energy is the energy evolved when a crystal lattice is formed from its component ions.
The lattice energy depends on the size of the ions. The smaller the sizes of the ions, the larger the lattice energy.
The order of energy released in lattice formation for these compounds is;
TlN> MgS > NaF > CsI
How is coal extracted?
How do Humans use it?
What are the benefits?
Coal is extracted by mining.
Once coal has been extracted, it can be used directly for heating and industrial processes or to fuel power plants for electricity.
Benefits are:
Coal energy is an affordable energy source because of the coal's stable price compared to other fuel sources.
Coal is easy to burn.
Coal produces high energy upon combustion.
Coal energy is inexpensive.
The potential energy diagram for a reaction starts at 180 kJ and ends at 300 kJ. What type of reaction does the diagram best represent? (5 points)
Exothermic reaction
Endothermic reaction
Reaction between two solids
Reaction between two liquids
Answer:
Exothermic reaction
Explanation:
An exothermic process releases heat, causing the temperature of the immediate surroundings to rise
The potential energy diagram for a reaction starts at 180 kJ and ends at 300 kJ. the type of reaction does the diagram best represent exothermic reaction.
What is exothermic reaction?An exothermic reaction would be one in which heat energy is emitted. Exo stands for "evolve out." The term "thermos" refers to a container that holds heat. The term "exothermic" refers to a process in which heat is produced. In general, an exothermic reaction is one in which heat is released as a byproduct.
Therefore, the reaction diagram will represent exothermic reaction.
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Methane, a highly flammable gas, is placed in a piston that has a volume of 2.1
L at STP. The piston then compresses the gas to 125 mL. What is the pressure
inside of the piston?
For which substance is the standard heat of formation not equal to zero?
Hydrogen (H2)
Aluminum oxide (Al2O3)
Oxygen (O2)
Potassium (K)
Answer:
Aluminum oxide (Al₂O₃)
Explanation:
The standard heat (or enthalpy) of formation of a compound, is the amount of change in the enthalpy that takes place when 1 mole of the compound is produced from the elements it contains whereby the compounds and elements in the reaction are in their standard states
The standard state of an element, is the state in which the element is in the most stable form at a pressure of 1 bar
Therefore, the heat of formation of hydrogen, H₂, oxygen, O₂, and potassium, (K), will have a heat of formation of zero, while Al₂O₃ which is made of aluminum and oxygen in combining to form a compound in proportions which are different from their initial standard states will have a heat of formation not equal to zero
What would be the volume of 0.500 mole of an
ideal gas at STP
What is the correct equilibrium constant expression for equation P2(g)
2 F20(g) = 2 PO(g) + 2 F2(g) ?
Answer:
k = [F2]² [PO]² / [P2] [F2O]²
Explanation:
In a chemical equilibrium, the equilibrium constant expression is written as the ratio between the molar concentration of the products over the molar concentration of the reactants. Each species powered to its reaction coefficient. For the equilibrium:
P2(g) + 2F2O(g) ⇄ 2PO(g) + 2F2(g)
The equilibrium constant, k, is:
k = [F2]² [PO]² / [P2] [F2O]²
How many grams of each product would be produced if a 155 lb person consumed the lethal dose of lead?
What is the pH of 1.0 M KOH solution?
Answer:
pH = 14
Explanation:
pOH = -log[OH-] = -log1,0 = 0
pH + pOH = 14
pH = 14 - pOH = 14 - 0 = 14
Answer:
pH= 14Explanation:
hope it helps
#CARRYONLEARNINGAn arctic weather balloon is filled with 46.0L of helium gas inside a prep shed. The temperature inside the shed is 12°C The balloon is then taken outside, where the temperature is -10°C Calculate the new volume of the balloon.
You may assume the pressure on the balloon stays constant at exactly 1atm Be sure your answer has the correct number of significant digits.
please help
Answer:
42.45 L
Explanation:
Using the Charle's law equation as follows:
V1/T1 = V2/T2
Where;
T1 = initial temperature (K)
T2 = final temperature (K)
V1 = initial volume (L)
V2 = final volume (L)
Based on the information provided in this question;
V1 = 46.0 L
V2 = ?
T1 = 12°C = 12 + 273 = 285K
T2 = -10°C = -10 + 273 = 263K
Using V1/T1 = V2/T2
46/285 = V2/263
Cross multiply
285V2 = 46 × 263
285V2 = 12098
V2 = 12098 ÷ 285
V2 = 42.45L
The new volume of the balloon is 42.45 L.
Two reasons that a plant from a rain forest would not survive in a desert home?
Answer: A planet from a rain forest would not survive in a desert home, for the fact they depend on water and as these live from water, without it, this leads to dehydration and with loss of water with plants, nothing is able to survive when it comes to a rain forest plant being in a desert home. Another reason is the high trees and leaves that are providing the plants enough sunlight or shade to grow, it guarantees to help keep the temperature normal. Being in a deserted area would mean that there would be a temperature change, something the plant is not used to. Without that needed shade and avoiding the scorching sun, they will die out from how different the temperature is, and how hot it is.
Explanation: I hope this helped you.
okay, the answer should be simple and easy, plants from a rainforest would not survive in a desert because the plants in the rainforest do get water, sunlight and air whereas the plants in the desert have Sunlight which is very hot. so if a plant in the rainforest was transferred to the desert it will hard to survive and it will eventually die because they will not get water that will be needed and the plant can get sunburns with the too hot temperature.
A cook is trying to identify a white powdery substance. The substance does not
dissolve in water, but it forms a solution in oil. Could the substance be table salt?
Why or why not?
it is not table salt
Explanation:
Table salt dissolves in water.
3.A chair will move by itself because of its inertia.True or False.
Answer:
false
Explanation:
Inertia is the resistance of any physical object to any change in its velocity, so it can't move by itself. Only by a different entity.
Answer: False
Explanation: In order to understand this, you need to understand what inertia means. In short, inertia is a property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force.
The rate constant for a first order reaction
is 2.80-10-35-1 at 60.0°C. The rate
constant at 45.0°C is 4.80.10-4 5-1. What
is the activation energy for the reaction?
[ ? ]kJ/mol
Recall that R = 8.314 J/mol K
Answer:
E_a = 103.626 × 10³ KJ/mol
Explanation:
Formula to solve this is given by;
Log(k2/k1) = (E_a/2.303R)((1/T1) - (1/T2))
Where;
k2 is rate constant at second temperature
k1 is rate constant at first temperature
R is universal gas constant
T1 is first temperature
T2 is second temperature
We are given;
k1 = 2.8 × 10^(-3) /s
k2 = 4.8 × 10^(-4) /s
R = 8.314 J/mol.k
T1 = 60°C = 333.15 K
T2 = 45°C = 318.15 K
Thus;
Log((4.8 × 10^(-4))/(2.8 × 10^(-3))) = (E_a/(2.303 × 8.314))((1/333.15) - (1/318.15))
We now have;
-0.76592 = -0.00000739121E_a
E_a = -0.76592/-0.00000739121
E_a = 103.626 × 10³ KJ/mol
Which of the following is a DIFFERENCE between electricity and magnetism?
It is possible to have single positive or negative electric charges, but magnetic poles always come in pairs
Electricity can be observed, but magnetism cannot
Opposite electric charges attract and like repel; like magnetic charges attract and opposites repel
Electric forces have a field associated with them; magnetism does not
Answer:
the major difference between electricity and magnetism is it presence of magnetism and electricity give you present in a static charge of magnetism president is only felt when they are moving charge as a result of electricity
CuFeS2 + 3 CuCl2 --> 4 CuCl + FeCl2 + 2 S How many mL of 0.075 M CuCl2 are needed to titrate 0.20 grams of CuFeS2?
Answer:
[tex]V_{CuCl_2 }= 43.6mL[/tex]
Explanation:
Hello there!
In this case, according to this titration problem, it is possible to note there is a 1:3 mole ratio of CuFeS2 to CuCl2; it means that we can use the following equation:
[tex]3*n_{CuFeS_2}=n_{CuCl_2 }[/tex]
Thus, by introducing the mass and molar mass of the former and the volume and concentration of the latter, we write:
[tex]3*0.20gCuFeS_2*\frac{1mol}{183.51g} =V_{CuCl_2 }*0.075\frac{mol}{L} \\\\V_{CuCl_2 }=\frac{0.00327mol}{0.075mol/L}*\frac{1000mL}{1L} \\\\V_{CuCl_2 }= 43.6mL[/tex]
Regards!
Which car has the highest kinetic energy if each car is traveling at a speed of 1 m/s? Explain how you arrived at your answer.
Car a is going 2 KG
Car B 4KG
Car c 6KG
Car D 8KG
Car D
Because it is the heaviest. Kinetic energy is directly proportional to the velocity and mass of the object. All the cars have the same velocity. But Car D has the most mass. So, it has most kinetic energy, because more the mass more the energy.
Guysssss help please! Will give BRAINLIEST!
A sample of nitrogen gas has a volume of 1.75L at STP. How many moles of N2 are present?
Answer:
At STP, 1 mole = 22.4 litres
Now, at STP 22.4 litres N2 gas = 1 mole
Therefore, 1.75 litres N2 gas = 1.75/22.4 = 0.078125 moles
Explanation:
here is your answer
According to the standard temperature and pressure conditions,there are 0.078 moles in 1.75 L of nitrogen gas at STP.
What is standard temperature and standard pressure?Standard temperature and pressure are defined as a standard set of conditions required for experimental measurements which are established to allow comparison between different sets of data.
Standards which are commonly used are those International Union of pure and applied chemistry and national institute of standards and technology.These are not universally accepted standards but are the ones which are commonly used.
Standard conditions of pressure and temperature are necessary to define standard reference conditions used to express volumes of liquids and gases.
These values are important to physicists, chemists ,engineers ,pilots and navigators.
At STP, 1 mole of nitrogen gas occupies 22.4 L
∴1.75 L will occupy 1.75/22.4=0.078 moles
Thus , there are 0.078 moles in 1.75 L of nitrogen gas at STP.
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A solution with a pOH of 4.3 has a [H+] of ??
please help
Answer:
A solution with a pOH of 4.3 has a [H+] of 2*10⁻¹⁰ M.
Explanation:
The pOH (or potential OH) is a measure of the basicity or alkalinity of a solution.
pOH indicates the concentration of hydroxyl ions [OH-] present in a solution. It is defined as the negative logarithm of the activity of hydroxide ions. That is, the concentration of OH- ions:
pOH= -log [OH-]
On the other hand, pH is also a measure of the basicity or alkalinity of a solution. POH is an indicator that is related to pH by:
pOH + pH= 14
So, if the solution has a pOH equal to 4.3, the pH is calculated by:
4.3 + pH= 14
pH= 14 - 4.3
pH= 9.7
The pH is defined as the logarithm of the concentration of H+ ions, with the sign changed:
pH= -log [H+]
So, in this case:
9.7= - log[H+]
Solving
[H+]= 2*10⁻¹⁰ M
A solution with a pOH of 4.3 has a [H+] of 2*10⁻¹⁰ M.
10) Which preparation produces a 2.0 M solution of Co
H1206? [molecular mass = 180.0]
(A) 180.0 g of C6H12O6 dissolved in 1000. mL of
solution
(B) 90.0 g of C6H1206 dissolved in 1000. mL of
solution
(C) 180.0 g of C6H1206 dissolved in 500.0 mL of
solution
(D) 90.0 g of C6H1206 dissolved in 500.0 mL of
solution
Answer:
(C) 180.0 g of C6H12O6 dissolved in 500.0 mL of solution
Explanation:
Molarity is mole/volume.
1. Find the mass of C6H12O6 in 1 Liter of 2.0 solution
(2 mol C6H12O6 / L) * (180 g / mol C6H12O6) = 360 g C6H12O6
There are 360 g C6H12O6 in 1000 mL of solution
2. Compare the value you found in step 1 to each of the multiple choice answers.
180.0 g of C6H12O6 dissolved in 500.0 mL of solution is exactly proportional to 360 g C6H12O6 in 1000 mL of solution.
The preparation which produces a 2.0 M solution of C₆H₁₂O₆ is 180.0 g of C₆H₁₂O₆ dissolved in 500.0 mL of solution.
How molarity is calculated?Molarity is defined as the number of moles of solute present in per liter of solution.
Moles of any substance will be calculated as :
n = W/M, where
W = given mass
M = molar mass
In the question given that molar mass of C₆H₁₂O₆ is 180 g/mole, and let we have produced the solution of 2 molarity by these amount in 1 liter i.e.
2 = n/1
n = 2 moles
Now by using these moles we can calculate the required mass of C₆H₁₂O₆ as:
2 = W/180
W = 360g
From this it is clear that for the preparation of 1 liter of solution of 2 molarity 360g of C₆H₁₂O₆ is required. So in 500mL of solution, 180 g of C₆H₁₂O₆ will use.
Hence, option (C) is correct i.e. 180.0 g of C₆H₁₂O₆ dissolved in 500.0 mL of solution.
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The number of molecules of ammonia, NH₃, in water solution required for complete ionization of one molecule of sulfuric acid, H₂SO₄, is
1
2
3
4
6
Please Explain!!!
Answer:
6 that will be the answer