Answer:
Take about 2g barium hydroxide in a test tube. Add 1 g of ammonium chloride and mix with the help of a glass rod. Touch the bottom of the test tube with your palm. What do you feel? Is this an exothermic or endothermic reaction?
A gas occupies 11.2 L at a pressure of 35.0 mm . What is the volume of the gas if it is Increased to a pressure of 64.0 mm Hg?
A) 6.13 L
B) 110.2 L
C) 200.0 K
D) 20.5 L
Explanation:
[tex]from \: boyle's \: law \\ P _{1} V _{1} = P _{2} V _{2} \\ 35 \times 11.2 = 64 \times V _{2} \\ V _{2} = \frac{35 \times 11.2}{64} \\ V _{2} = 6.125 \: L[/tex]
The volume of the gas is 6.13 l if it is increased to a pressure of 64.0 mm Hg.
Boyle's LawBoyle's law is a gas law which states that at constant temperature, the pressure of a given quantity of a gas varies inversely with its volume occupied by it.
According to the Boyle's Law:
PV = constant
Thus,
[tex]P_{1}V_{1} = P_{2} V_{2}[/tex]
where,
[tex]P_{1}[/tex] is the initial pressure
[tex]V_{1}[/tex] is the initial volume
[tex]P_{2}[/tex] is the final pressure
[tex]V_{2}[/tex] is the final volume
Now, put the values in above equation we get
[tex]P_{1} V_{1} = P_{2} V_{2}[/tex]
35.0 × 11.2 = 64.0 × [tex]V_{2}[/tex]
392 = 64.0 × [tex]V_{2}[/tex]
[tex]V_{2}[/tex] = [tex]\frac{392}{64}[/tex]
[tex]V_{2}[/tex] = 6.13 L
Thus, the volume of the gas is 6.13 l if it is increased to a pressure of 64.0 mm Hg.
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I need help with science pls help me :(!
help me pleaseeeee #5
Answer:
Red
Explanation:
Help with science!!!!
Answer:
the answe would be (c) temperate continental
Explanation:
f
A fluorinated organic gas in a cylinder is com-
pressed from an initial volume of 930 ml at
156 Pa to 400 mL at the same temperature.
What is the final pressure?
Answer in units of Pa.
Answer:
Final pressure = 362.7 Pa
Explanation:
Given that,
Initial volume, V₁ = 930 ml
Initial pressure P₁ = 156 Pa
Final volume, V₂ = 400 mL
We need to find the final pressure. We know that the relation between volume and pressure is inverse i.e.
[tex]V\propto \dfrac{1}{P}\\\\\dfrac{V_1}{V_2}=\dfrac{P_2}{P_1}\\\\P_2=\dfrac{V_1P_1}{V_2}\\\\P_2=\dfrac{930\times 156}{400}\\\\P_2=362.7\ Pa[/tex]
So, the final pressure is equal to 362.7 Pa.
What is the correct definition of a mixture?
Answer:
a substance made by mixing other substances together.
Explanation:
A mixture is a substance made by mixing two or more substances together.
it will help. have a good night
Marcus has a mass of 75 kg here on Earth. What would his mass be if he was standing on
the Moon?
Remember, gravity on Earth is 9.8 m/s2 gravity on the moon is 1.6 m/s2.
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Answer:
It is given that the mass of a man is 75 Kg in earth. Then his mass would be same in moon as mass of anything cannot be changed. The weight of the man in earth can be calculated by W=mg=75×9.8=735 N.
Which of the following best helps explain why an atom of Rb gas more easily loses an electron in a chemical reaction than an atom of Li gas?
Α. Rb has a higher electronegativity than Li has.
B. The Rb atom has a greater number of valence electrons than the Li atom has.
C. The nucleus of the Rb atom has a greater number of protons and neutrons than the nucleus of the Li atom has.
D. In the Rb atom the valence electron is farther from its nucleus than the valence electron of Li is from its nucleus.
Answer:
D
Explanation:
In the Rb atom the valence electron is farther from its nucleus than the valence electron of Li is from its nucleus
An isotope has a half life of 5 minutes. How much of a 100 gram sample of this isotope is left after 20 minutes?
Answer:
6.25 gram
Explanation:
Applying,
R = R'([tex]2^{a/n}[/tex])................ Equation 1
Where R = Original mass of the isotope, R' = mass of the isotope left after disintegration, a = Total time, n = half life.
make R' the subject of the equation
R' = R/([tex]2^{a/n}[/tex])................. Equation 2
From the question,
Given: R = 100 gram, a = 20 munites, n = 5 minutes.
Substitute these values into equation 2
R' = 100/([tex]2^{20/5}[/tex])
R' = 100/[tex]2^{4}[/tex]
R' = 100/16
R' = 6.25 gram
Look at the chemical equation:
Zn + 2HCl → ZnCl2 + H2
How many atoms of hydrogen (H) are present on both sides of the equation?
1
2
3
4
Answer:
B). 2
Explanation:
The atoms of hydrogen (H) present on both sides of the given equation
Zn + 2HCl → ZnCl2 + H2 are 2.
What are atoms ?Atoms are the smallest fundamental unit of particle which can't be destroyed further by any chemical mean.
What is Hydrogen(H) ?Hydrogen is the lightest element in the periodic table having molecular formula(H2) . It is combustible, tasteless, odorless, colorless gas
What is Equation?Equation in chemical science is the way to represent change in the conversion of reactants to product in reaction using symbols given by IUPAC.
The given reaction is
Zn + 2HCl → ZnCl2 + H2
There are two moles produces two moles of hydrogen, hence there are two atoms of hydrogen on both sides.
Hence, there are two atoms of hydrogen(H) are present on both sides of the equation.
Hence, option B is correct.
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What do the nuclei of H hydrogen atoms contain?
Answer:
brainliest plss
Explanation:
Most hydrogen atoms have a nucleus with only a single proton. About 1 in 10,000 hydrogen nuclei, however, also has a neutron; this particular isotope is called deuterium. An extremely rare hydrogen isotope, tritium, has 1 proton and 2 neutrons in its nucleus. ... Most hydrogen atoms have only a proton in the nucleus
explain why carbon dioxide is a gas, water is a liquid, and salt is solid at room temperature based on how the particals are held together.
Please help I'm having a hard time explaining this.
Answer:
Carbon dioxide is held together by weak intermolecular forces (only London dispersion LD) and is a non-polar molecule. Because of this weak attraction, it exists as a gas. Water on the other hand is polar (dipole forces DP), and has a stronger hydrogen bond existing within it (in addition to LD). This makes it attract itself more than say carbon dioxide molecules, so it commonly exists as a liquid. Finally, salt like water is polar, and has ionic bonds that are even stronger than a hydrogen bond. This makes salt have a great attraction to itself, sticking together as a solid because its molecules cant easily be broken up.
Explanation:
These are the strongest intermolecular forces ranked from strongest to weakest.
1. Network Covalent
2. Ionic
3. Hydrogen Bonding
4. Dipole Dipole
5. London Dispersion
What happens to wavelength as wave frequency increases?
Answer:
As a wavelength increases in size, its frequency and energy (E) decrease. From these equations you may realize that as the frequency increases, the wavelength gets shorter. As the frequency decreases, the wavelength gets longer.
Explanation:
What kind of nuclear reaction occurs in the following reactions?
Answer:
No 1 is fission
while no 2 is fusion
Fission is splitting on nucleus while fusion is forming heavier nucleus with nuclei
The kind of nuclear reaction that occurs in the following reactions are:
i. nuclear fission
ii. nuclear fusion.
What is a nuclear reaction?Nuclear reactions are that reactions in which a nucleus or nuclei collides with subatomic particles to form another, different nucleus. There are two types of collisions. Nuclear fission and nuclear fusion.
Nuclear fission is a process when large nuclei split and create small, numerous nuclei. It happens due to the instability of an atom. It split into two daughter nuclei.
Nuclear fusion is a process in which two or more small nuclei combine to create a large, heavy nucleus. The process releases a large amount of energy or can be absorbed.
Thus, the processes are i. nuclear fission
ii. nuclear fusion.
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.How many moles of NaCl are in 28.0 g?
Answer:
0.48 mols
Explanation:
to convert moles to mass u need to divide mass by the molar mass of NaCl which is 58.44g/mols.
28g ÷ 58.44g/mol = 0.48 mols
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Answer:
True True False
Explanation:
What type of matter can make solutions?
Answer:
Solutions can be solids dissolved in liquids. When you work with chemistry or even cook in your kitchen, you will usually be dissolving solids into liquids. Solutions can also be gases dissolved in liquids, such as carbonated water. There can also be gases in other gases and liquids in liquids.
Explanation:
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The rotational axis of the Earth and its magnetic axis are one and the same axis.
Select one:
a. no the two axises are separated by 11.5 degrees and are not one and the same.
B. This is true though the magnetic axis is harder to locate
Answer:
"A"
Explanation:
The magnetic dipole axis of the earth is tilted about 11½° from the rotation axis. This means the magnetic north pole and the geographic north pole are not in the same place. ...
They are also not the sam ehtings :
Magnetic axis is the straight line joining the two poles of a magnet (as the magnetic poles of the earth)
Rotational axis i think is the straight line that joines the north and the south pole of the .earth .... NOTE: The earth is a bit tilted....
look at the daigram for reference.
The rotational axis of the Earth and its magnetic axis are separated by 11.5 degrees and are not one and the same.
What is a rotational axis?The rotational axis is an imaginary line or axis through which any object rotates and revolves.
The angular momentum vector of the object is divided by the angular momentum magnitude to find the rotational axis of an object.
The rotational axis of the earth is 23.5 degrees.
Thus, the correct option is A.
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Can somebody please give me the IMF types of the following compounds?
NH3
HCL
CH4
My choices are Dispersion, Dipole Dipole, or Hydrogen Bonding.
Answer:
NH3 is Ammonia Which is Hydrogen Bonding
HCL is hydrochloric acid which is Dipole Dipole
CH4 is Methane which is Dispersion
When there are no decomposers, what happens to the grass?
Answer:
if there would have been no decomposers on Earth, the whole of the Earth would have been filled with dead and decaying matter of plants and animals.
Explanation:
I hope this helps :3
Answer: Imagine what would happen if there were no decomposers. Wastes and the remains of dead organisms would pile up and the nutrients within the waste and dead organisms would not be released back into the ecosystem. Producers would not have enough nutrients.
Explanation:
https://www.ck12.org/biology/consumers-and-decomposers/lesson/Consumers-and-Decomposers-MS-LS/#:~:text=Imagine%20what%20would%20happen%20if,would%20not%20have%20enough%20nutrients.
This is the site I got the info on, just so you know! I hope this helps!
Me podrían decir los nombres comunes de los siguientes hidrocarburos!! URGENTE AYUDA
Answer:
fdhhdhdhdhhshdgdvdvebehbehdhehdhhddhdf
Answer:
No Se Espanol
Explanation:
Why is it necessary for the triceps to be the contracting muscle when throwing
Explanation:
The triceps contract to allows the arm to extend and flex while throwing
Hydrogen chloride gas reacts with water to produce an acidic solution. The equation for
the reaction is shown.
HCI + H2O → CI + H2O
Which statement describes what happens during the reaction?
A The chloride ion is formed by accepting an electron from the water.
B The hydrogen chloride loses an electron to form the chloride ion.
C The water accepts a proton from the hydrogen chloride.
D The water donates a proton to the hydrogen chloride.
neid.
Answer:
C The water accepts a proton from the hydrogen chloride.
Explanation:
The equation given in this question where hydrogen chloride reacts with water is as follows:
HCI + H2O → CI- + H3O+
From this equation, hydrogen chloride (HCl) loses or donates hydrogen ion (H+) or proton to water (H2O), which accepts it to become hydronium ion. Hence, in a nutshell, water (H2O) accepts a proton (H+) from the hydrogen chloride (HCl) in this reaction.
What are the six atmospheric conditions that make weather?
Magnesium hydroxide is an ingredient in some antacids. Antacids react with excess hydrochloric acid in the stomach to relieve
indigestion.
a) balance the reaction that occurs between Mg(OH)2 and HCI.
(select choice) Mg(OH)2 + (select choice) HCI = (select choice) MgCl2 + (blank) H2O
b) what are the mole ratios that would be used to determine the number of moles of MgCl2 produced when HCl reacts with Mg(OH)2.
(blank) mol MgCl2/ (blank) mol Mg(OH)2
(blank) mol MgCl2/ (blank) mol HCI
Answer:
a. 2HCl + 1Mg(OH)2 → 1MgCl2 + 2H2O
b. 1 mol MgCl2/ 1 mol Mg(OH)2
1 mol MgCl2/ 2 mol HCI
Explanation:
a. The reaction of an acid (HCl) with a base (Mg(OH)2) produce water (H2O) and the salt (MgCl2):
_HCl + _Mg(OH)2 → _MgCl2 + _H2O
To balance the Cl:
2HCl + _Mg(OH)2 → _MgCl2 + _H2O
To balance the oxygen:
2HCl + _Mg(OH)2 → _MgCl2 + 2H2O
The reaction is now balanced
2HCl + 1Mg(OH)2 → 1MgCl2 + 2H2O
b. Based on the balanced reaction, the moles ratios are:
1 mol MgCl2/ 1 mol Mg(OH)2
1 mol MgCl2/ 2 mol HCI
Which type of wave has a longer wavelength than infrared radiation but it's shorter than radio waves
Answer: Infrared rays
Explanation:
En qué consistió el experimento de Rutherford?
Answer:
The gold foil experiment
El experimento de la lámina de oro
Explanation:
Help meeeeeeeeeeewweeee
Reason:- The Mechanism of Diffusion In the case of food coloring in water, the water is the solvent while the food coloring is the solute. Once they've mixed, they make a solution. Diffusion takes time, though how much time depends on the kinetic energy of the molecules randomly bouncing among each other.
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Answer:
6 mass
Explanation:
because the si unit of gram is mass
A 634.5 g sample of helium absorbs 125.7 calories of heat. The specific heat capacity of helium is 1.241 cal/(g·°C). By how much did the temperature of this sample change, in degrees Celsius?
Answer:
[tex]\Delta T=0.160\°C[/tex]
Explanation:
Hello there!
In this case, according to the following equation for the calculation of heat in this calorimetry problem:
[tex]Q=mC\Delta T[/tex]
It is possible for us to calculate to calculate the change in temperature for this process by solving for DT in the aforementioned equation:
[tex]\Delta T=\frac{Q}{mC}\\\\ \Delta T=\frac{125.7cal}{634.5g*1.241 cal/(g\°C)} \\\\ \Delta T=0.160\°C[/tex]
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