When a liquid absorbs energy and changes to a gas, what takes place?a. condensation,
b. sublimation,
c. infiltration,
d. evaporation
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1 What do strong acids and strong bases have in common?A They both partially dissociate, with reverse reactions occurring.B They both dissociate completely, with little or no reverse reactions.C They both remain intact when placed in water, with no dissociation taking place.D They both dissociate completely, with reverse reactions constantly taking place.2 What happens when the kinetic energy of molecules increases so much that electrons are released by the atoms, creating a swirling gas of positive ions and negative electrons?A Matter changes to a solid state.B Matter changes to a liquid state.C Matter changes to a plasma state.D Matter changes to a gaseous state.3 Consider a balloon that has a volume V. It contains n moles of gas, it has an internal pressure of P, and its temperature is T. If the balloon is heated to a temperature of 15.5T while it is placed under a high pressure of 15.5P, how does the volume of the balloon change?A It doubles.B It stays the same.C It increases greatly.D It decreases slightly.
What is the volume of 2 mol of chlorine gas at STP?
a student decreases the temperature of a 556 cm^3 balloon from 278 K to 231 K. Assuming constant pressure, what should the new volume of the balloon be
Check the statements that are a part of the Early Atomic Theory. a.Scientists believe that the atom is made up of elements. b.Atoms combine in whole number ratios to form compounds. c.Atoms cannot be created or destroyed during a chemical reaction.
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Answer:
K2CO3 dissociates more ions than Kr
Explanation:
A solution conducts electricity because of much supply of ions an example is strong electrolytes. A solution contains both positive and negative ions and the ability of these ions to move freely allows them to carry positive and negative charges thereby conducting electricity. A solution such as K₂CO₃ dissociates more ions than KBr, therefore it is a better conductor of electricity. Neutral solutions do not conduct electricity.
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The age of the universe is approximately 13.8 billion years old. The universe is constantly expanding. A universe with a low density of matter is older than a matter – dmominated one. To determine the density and composition of the universe, scientists rely on missions such as NASA’s Wilkinson Microwave Anisotropy Probe spacecraft. They measure the thermal radiation left from Big Bang.
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The reaction between ethanol and oxygen must be a combustion reaction to give carbon dioxide and water as products.
The reaction between ethanol, and oxygen,
is as follows:
In order to balance the reaction (the number of atoms of each element in the reaction are same on both the sides that is product and reactant), is multiplied by 3 in the reactant side and
is multiplied by 2 and
is multiplied by 3 on product side.
So, the balanced reaction is:
From the balanced reaction it is clear that 1 mole of reacts with 3 moles of
to give 2 moles of
and 3 moles of
.
Since, 1 mole = molecules (Avogadro's number)
So,
Number of molecules of =
molecules.
Number of molecules of =
molecules.
Number of molecules of =
molecules.
Number of molecules of =
molecules.
Answer : The number of molecules of are 2, 3, 1 and 3 respectively.
Explanation :
The given balanced chemical reaction is,
Balanced chemical reaction is the reaction in which the number of atoms of an individual elements present on reactant side must be equal to the product side.
The species present on the left side of the right arrow is the reactant and the species present on the right side of the right arrow is the product.
From the balanced chemical reaction, we conclude that there are 1 molecule of , 3 molecules of
, 2 molecules of
and 3 molecules of
.
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Answer:
7.4
Explanation:
F = m × a
F/a = m
m = 140 / 19
m = 7.4
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Answer:
The answer to your question is: letter A
Explanation:
A. Gas particles are in constant motion. This statement is true because this theory says that Gases are composed of a large number of particles that behave like hard, spherical objects in a state of constant, random motion.
B. Gas particles attract each other. This statement is false because this theory says that there is no force of attraction between gas particles or between the particles and the walls of the container.
C. Gas particles lose their energy during collisions. This statement is false, this theory says that none of the energy of a gas particle is lost when it collides with another particle or with the walls of the container.
D. Gas particles stick to the walls of their container. This statement is false, the theory says that there is no force of attraction between gas particles or between the particles and the walls of the container.
Cu(NO3)2(s) + CuO(s) → 2NO(g) + O3(g)
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there are 2 copper atoms on the left side of the arrow, but none on the other side. there are also 7 oxygen atoms on the left hand side, but only 5 on the right hand side of the arrow.