Some molecules in a substance have a high kinetic energy hence they are able to convert into vapor. These molecules exert pressure on the liquid surface.
We know that the molecules that compose matter are in constant random motion. The kinetic energy of all the molecules in the liquid are not the same. The molecules at the surface of the liquid posses more kinetic energy than the molecules below.
Some molecules of a substance have high enough kinetic energy to vaporize. These molecules exert pressure on the substance.
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Answer:
Some molecules of a substance have high enough kinetic energy to vaporize. These molecules exert pressure on the substance.
Explanation:
What is the frequency of 14000 X ray photons having an energy of 5.27*10-5 J/Hz
The frequency of the X - ray is [tex]7.95 \times 10^{28} \ Hz[/tex].
The given parameters:
Energy of the X-ray, E = 5.27 x 10⁻⁵ JThe frequency of the wave is calculated as follows;
[tex]E = hf\\\\f = \frac{E}{h} \\\\[/tex]
where;
h is Planck's constant = 6.626 x 10⁻³⁴ J/HzSubstitute the given parameters;
[tex]f = \frac{E}{h} \\\\f = \frac{5.27 \times 10^{-5} }{6.626 \times 10^{-34}} \\\\f = 7.95 \times 10^{28} \ Hz[/tex]
Thus, the frequency of the X - ray is [tex]7.95 \times 10^{28} \ Hz[/tex].
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Which one is the answer?
Answer:
I think 1, 4, and 5 are the answers to this question. I am not sure about 4 though.
Explanation:
You have to have a power source (1), you also have to have a way to get that power somewhere else (5), and the reason for 4 would be that the power has to come back through the power source to remain working.
What is the wavelength of the above wave?
Answer:
well what above wave?? do you have a picture
Explanation:
how many kernels are in a bag of microwave popcorn?
Which statement correctly defines dynamic equilibrium?
At dynamic equilibrium, the rates of forward and reverse reactions are equal.
At dynamic equilibrium, the rate of the forward reaction is higher than the rate of the reverse reaction.
At dynamic equilibrium, the forward and reverse reactions stop.
At dynamic equilibrium, the concentrations of reactants and products are equal.
Answer: at dynamic equilibrium, the rates of forward and reverse reactions are equal.
Explanation:
The correct statement defines dynamic equilibrium "at dynamic equilibrium, the rates of forward and reverse reactions are equal."
What is dynamic equilibrium?The state of a particular system wherein the reversible reaction takes place ceases modifying the ratio of reactants as well as products, but there is still a transfer of substances among the reactants and products is known as dynamic equilibrium.
What is reactions?Chemical reaction can be defined as the a method for creating novel chemicals with unique features.
The correct statement defines dynamic equilibrium "at dynamic equilibrium, the rates of forward and reverse reactions are equal."
Therefore, the correct answer will be option (a).
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001 10.0 points
If you mix 4.5 g of HCl in enough water to
make 0.9 L (900 mL) of solution, what is the
molarity of the solution?
Answer in units of M.
which of the following molecular compounds does NOT need the usage of prefix for the first element
SO2
S2O3
N2S
N2S3
Answer:
SO2
Explanation:
that's my answer
Sana mKatolong
What happens to the atoms in food once animals eat them?
they are destroyed
they are used to make the animal grow
they are released as waste
Answer:
i think
they are used to male the animal grow
Once the animal eats the food, the atoms in food are used to make the animal grow.
What is an atom?An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.
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A student pours ammonium nitrate into a container of room temperature water. The student stirs the mixture with a stirring rod and then feels the outside of the container, which is cold to the touch. Which material is part of the system that absorbed heat?
the water
the air
the stirring rod
the container
The material that absorbs the heat of the system is water owing to its high specific heat capacity.
The specific heat capacity of a substance refers to the amount of heat that is capable of increasing the temperature of 1 Kg of a body by 1 K. The higher the specific heat capacity, the more the amount of heat that the body can absorb without temperature change.
The material that absorbs the heat of the system is water because water has a higher specific heat capacity than all the other materials present.
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The material which is part of the system that absorbed heat is; The water.
Discussion:
According to the question;
Water was initially at room temperature.We know by convention, ammonium nitrate is a cold substance.In essence, the heat liberated from the system must have been absorbed by the water so that the outside of the container after mixing becomes cold.
This is so because water has a high specific heat capacity.
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BRAINLIEST TO BEST ANSWER AND 40 POINTS GRAB QUICK
Why are sodium (Na) and potassium (K) in the same group on the periodic table?
Answer:
They both have 1 valence electron
Explanation:
giving brainly if correct and explained
Answer:
D.
Explanation:
A concentrated solution is one that has a lot of solute (the substance being dissolved) in the solvent (the substance doing the dissolving). When a solution is concentrated, it means it has a high ratio of solute to solvent, so the answer is D.
Hope this helps.
what are three different facts about mass
plz tel will give brainlyest
Answer: all mass takes up space. everything has mass. Theres a unit of mass called a slug thats not the bug!
Explanation:
Do solar panels use electrical energy or produce electrical?
Answer:
How Does a Solar Panel Generate Power? Solar panels use the photons produced by sunlight to generate direct current (DC) electricity. When the photons hit the panel they are absorbed by the panel's semiconducting silicon material.
Explanation:
Answer:
Solar panels produce electrical energy by absorbing the solar energy from the sun and converting it into electrical energy.
Explanation:
What is freshly pumped oil called?
Answer:
When the drill hits oil, some of the oil rises from the ground high into the air. This immediate release of oil is known as a "gusher." Once a reservoir has been located, pumps are used to extract the oil.
What is freshly pumped oil called?
petroleum
Explanation:
When you knock on a door, what causes you to hear a sound?
Vibrations that cause bound beams
Vibrations that cause sound waves
Vibrations that cause sound circles
Vibrations that cause sound
Answer: B.
Explanation:
Microscopes are used to see tiny organisms. The specimen is thin kept on the grid in this microscope, and can be magnified more than a million times and can be viewed in the monitor. Name the Microscope
Answer:
The electron microscope is the answer.
What type of mixture is throughly mixing powdered lemonade with water
Answer:
I believe it would be a solution I could be wrong tho
Explanation:
Answer:
a solution
Homogeneous mixtures (solutions)
Explanation:
Lemonade is a special type of mixture called a solution.
...................................................................................................................................................
What type of mixture is made by thoroughly mixing powdered lemonade with water?
Homogeneous mixtures (solutions)
Mixtures with substances dissolved evenly into one another, like pink lemonade powder dissolved in water, are called homogeneous mixtures, or solutions.
How many totals atoms are present in the compound : Mg(OH)2
A. 3
B. 4
C. 5
D. 7
1 atom Mg, 2 atoms O and 2 atoms H.
1 + 2 + 2 = 5, so correct answer is C
Which of the following is an example of genetic engineering?
1.The sweetest honeydew melons are selected and the seeds extracted and planted for next year’s crop.
2.The strongest animals in a population survive and reproduce.
3.An exact replica of a frog is created from a body cell.
4.A gene is introduced into salmon to make them grow twice as fast.
Answer:
4. A gene is introduced into salmon to make them grow twice as fast.
Will Mark Branliest!
How many grams are in 4.1 mole sample of CO?
Figure 2
Describe how a dog grows. Describe their mode of reproduction
Explanation:
Although all puppies are officially considered adult dogs once they reach one year old, puppies continue to grow in height and size while their bones are still developing, which takes anywhere from 6 to 24 months. Their skeletal growth is what determines how tall they will become as adults.
What state is represented by the sign (s)
liquid
gas
solid
dissolved in water
solid.
liquid is (l)
gas is (g)
dissolved in water is (aq)
what mass does a nuetron have?
Answer:
1 AMU
Explanation:
Protons, neutrons, and electrons: Both protons and neutrons have a mass of 1 amu and are found in the nucleus.
A gas in a rigid container at 25°C has a pressure of 0. 96 atm. A change in temperature causes the pressure to increase to 1. 25 atm. What is the new temperature of the gas? Use StartFraction P subscript 1 over T subscript 1 EndFraction equals StartFraction P subscript 2 over T subscript 2 EndFraction. â€""44. 2°C 32. 6°C 115°C 388°C.
The new temperature of the gas is 115 °C
From the question given above, the following data were obtained:
Initial temperature (T₁) = 25 °C = 25 + 273 = 298 K Initial pressure (P₁) = 0.96 atmNew pressure (P₂) = 1.25 atmNew temperature (T₂) =?The new temperature of gas can be obtained as follow:
[tex] \frac{P_1}{T_1} = \frac{P_2}{T_2} \\ \\ \frac{0.96}{298} = \frac{1.25}{T_2} \\ \\ cross \: multiply \\ \\ T_2 \times 0.96 = 298 \times 1.25 \\ \\ divide \: both \: side \: by \: 0.96 \\ \\T_2 = \frac{298 \times 1.25 }{0.96} \\ \\ T_2 = 388 \: K \\ \\ subtract \: 273 \: from \: 388 \: to \: express \: the \: answer \: im \: \degree \: C \\ \\ T_2 = 388 - 273 \\ \\ T_2 = 115 \: \degree \: C [/tex]
Therefore, the new temperature is 115 °C
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1) How many moles of hydrogen gas can be produced if 0.57 moles of hydrochloric
acid, HCl, reacts with excess solid zinc according to the following chemical
equation?
2 HCl + Zn → Hz + ZnCl2
Answer: 0.28 mol H2
Explanation:
0.57mol HCl 1mol H2
2mol Hcl
Hydrochloric acid and zinc show the displacement reaction to produce hydrogen gas and zinc chloride. 0.57 moles of hydrochloric acid and excess zinc react to produce 0.28 mol H₂.
What is a displacement reaction?A displacement reaction is the removal of one of the elements from the reactant with highly active species of the reactivity species to produce the products. It can be a single or double displacement reaction.
The balanced chemical displacement reaction is given as:
2 HCl + Zn → H₂ + ZnCl₂
Here, two hydrochloric acids react with zinc to form one mole of hydrogen gas and one mole of zinc chloride.
Given,
Hydrochloric acid = 0.57 moles
Using proportions to calculate moles as:
If 2 moles of HCl = 1 mole H₂
Then, 0.57 moles = X moles
X = 0.57 ÷ 2
= 0.28 mol H₂
Therefore, 0.57 mole HCl produces 0.28 moles of hydrogen gas.
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2. Write down the position of alkaline earth metal in the Modern periodic table What is their valency?
Answer:
they are in group II and they have two electrons in their outermost energy levels ( valency)...is this helpful?
explain the concept of thekinetic molecular theory
Answer:
Kinetic Molecular Theory states that gas particles are in constant motion and exhibit perfectly elastic collisions. Kinetic Molecular Theory can be used to explain both Charles' and Boyle's Laws. The average kinetic energy of a collection of gas particles is directly proportional to absolute temperature only.
Explanation:
hope this helps! goodluck & enjoy the rest of ur day or night.
Help me:) please and thanks! Part 3
Answer:
then this picture 11 Venkat and one person is
Explanation:
join date 20th December is not a problem with the topic of your name and address of the topic of your name and address of the topic of your name and address of the topic of your life in general is not available in the equation is the topic of your name and address
so nothing in this picture .
copper cannot be used as an anode in electrolysis of water
Answer:
I hope this will help
Explanation:
Copper is purified by electrolysis . Electricity is passed through solutions containing copper compounds, such as copper(II) sulfate. The anode (positive electrode ) is made from impure copper and the cathode (negative electrode) is made from pure copper.
A penny is 0.061 inches thick. What is the value of the 6 in the thickness of a penny? Mathematics not chemistry
Answer:
because of the location of the 6 the answer is 6 cent
Answer:
Hundredths
Explanation:
$6 times 1/$100. The 0 is tenths, the 6 is hundredths and the 1 is thousandths.