Answer:
[tex]51y6. \times { \times }^{2} [/tex]
explain using the kinetic molecular theory, why a liquid becomes a solid when the temperature is decreased.
A liquid becomes a solid if its temperature decreases. In general a gas becomes a liquid or solid when it is cooled. Particles have less energy and therefore move closer together so that the attractive forces become stronger, and the gas becomes a liquid or a solid.
Attractive forces between particles: Very strong ...
Spaces between particles: Very little space bet...
Energy and movement of particles: Low energy - ...
Assuming an efficiency of 49.70%, calculate the actual yield of magnesium nitrate formed from 139.0 g of magnesium and excess copper(II) nitrate. Mg+Cu(NO3)2⟶Mg(NO3)2+Cu
Answer:
221.5 g
Explanation:
if you want a step by step problem feel free to ask
what are the limitations of Refractometer?
Answer:
Tedious calibration No instrument protocol Operator dependent readings( limited accuracy) Long and difficult thermosetting (water bath is required after each experiment)
Explanation:
hope it helps you
brainliest plz if it helped
Write for empiricalformula
Fe2+, cr4+, cl-, O2-
Answer:
{eq}Fe^{2+} {/eq} and {eq}I^- {/eq} forms {eq}FeI_2 {/eq}
{eq}Fe^{2+} {/eq} and {eq}S^{2-} {/eq} forms {eq}FeS {/eq}
{eq}Cr^{4+} {/eq} and...
Explanation:
Empirical formula:
The empirical formula gives the simple ratio of the different types of atoms in a compound. It is different from the molecular formula, which gives the exact number of each type of atom in a compound.
QUESTIONS
71. The temperature scale used in everyday life in most of
the world except the United States is the
scale.
The beaker is left until there is no further change in the appearance of the liquid. And the options for the answer are : A : All the liquid is purple. B : None of the liquid is purple. C : Only the bottom half of the liquid is purple. D : Only the top half of the liquid is purple
Answer:
none of the liquid is purple
what force/ area causes gas pressure
Answer:
i would think its rapid motion and collision of molecules causing pressure.
Explanation:
it depends on the number so the more gas molecules collide, the more pressure there is. sorry if this doesn't help.
Answer:
collisions of gas particles with the walls of the container.
Explanation:
Which gases contribute more significantly to Global warming
Answer:
Carbon dioxide
Explanation:
A byproduct of fossil fuel combustion, is the principal greenhouse gas contributing to global warming. However, other greenhouse gases including methane, nitrous oxide, and a number of industrial-process gases also are important contributors to climate change.
Consider the balanced chemical reaction below. What is the maximum number of
grams of Ag that can be produced if 0.570 mol of Zn and 0.691 mol of Ag2O
react?
Zn(s) + Ag2O(s) → ZnO(s) + 2 Ag(s)
Answer:
121.98
Explanation:
As you see the reaction, stoichiometry for both Zn and Ag2O is one so for calculating, we choose the one with less mol. Then in product we have 1.14 mol Ag. As the atomic mass of Ag is 107, we have 121.98 grams of Ag
Hope u get it
How many grams of carbon are in 243.3 g
of carbon tetrachloride?
WILL MARK BRAINLIEST
What occurs when energy is added or removed from an object or a system by an outside agent?
Potential Energy
Kinetic Energy
Elastic Potential Energy
Thermal Energy
Work
Answer:
Its Thermal Energy
Explanation:
The total pressure in a mixture of gases is equal to the partial pressure(s) of ________. the gas that occupies the largest volume the gas with the smallest number of moles all the gases added together the gas with the highest molecular weight the gas with the greatest number of moles
The total pressure in a mixture of gases is equal to the partial pressure of all the gases added together
According to Dalton's Law of Partial Pressure, The total pressure exerted by a mixture of gases which are non reacting is equal to the sum of the partial pressure of each individual gas that make up the mixture
Mathematically, Ut can be written as
P{total}= p1+p2, ....+ pn
where p1, p2, …, pn are partial pressures of each gas component.
For example :A gaseous mixture consisting of Helium and Nitrogen gas . If the pressure exerted by He is 3 atm while Nitrogeb exerted is 9 atm. The total pressure will be:
P{total}= p1+p2, ....+ pn
P{total}= 3+9
P{total}= 12
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A lung holding a residual air volume of 1.50 L at 36 ºC has a pressure of 1.00 atm. How many moles of residual air is the lung holding? R = 0.0821 L.atm/mol.K.
Answer:
0.05909882564 mol
Explanation:
PV=nRT
n = 1.00atm*1.50L /(0.0821L.atm/mol.k * 309.15 k)
= 0.05909882564 mol
How many mols are present in 5.24 x 1024 atoms of Carbon tetra fluoride?
Answer: 5.44×10226.022140857(74)×1023⋅mol−1.
Explanation: So the answer is approx. 0.10⋅mol
Which of the following gives the correct numbers of protons, neutrons, and
electrons, respectively, in a neutral atom of Potassium?
A) 19 protons, 20 neutrons, 19 electrons
B) 39 protons, 20 neutrons, 39 electrons
C) 20 protons, 19 neutrons, 19 electrons
D) 39 protons, 20 neutrons, 19 electrons
Answer:
A
Explanation:
because in neutral proton equals to electron
The correct option is A. Potassium has 19 protons, 20 neutrons, and 19 electrons.
What is potassium?
Potassium is an element. It has protons and electrons. potassium has a nucleus. The nucleus contains protons and neutrons. Electrons revolve around the nucleus.
Proton is a positively charged atom and an electron is negatively charged and revolves around the atom. Neutron is neutral in charge.
The atomic number of potassium is 19. So it has 19 protons and 20 neutrons and 19 electrons.
Therefore, The correct option is A. Potassium has 19 protons, 20 neutrons, and 19 electrons.
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1. What is the purpose of the advertisement?
Answer:
For enlightenment, development and making people understand the usefulness of the product
Answer:
AKA "AD"AND ADS EXPLAIN WAYS IN WHICH THE PRODUCT IS USEFUL ... PLEASE MARK ME AS BRAINLIST
How many atoms are present in 0.529 moles of Li?
Answer:
3.18 × 10²³ atomsExplanation:
The number of atoms can be found by using the formula
N = n × L
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
N = 0.529 × 6.02 × 10²³
We have the final answer as
3.18 × 10²³ atomsHope this helps you
Determine the formal charge on each atom in the structure.
Answer:
−0.75 , 1.25
Explanation:
Please refer to attachment for more information
Help I believe it’s B or A
Which term describes the crust and the upper part of the mantle broken into large tectonic
plates?
A ) Outer core
B ) Lithosphere
C ) Asthenosphere
D )Mantle
What is the percent yield if 23.1 grams of FeCl3 (162.2 g/mol) is created from 10.61 grams of iron (55.85 g/mol) in the following reaction Report your answer with three significant
figures
2 Fe + 3Cl2 + 2 FeCl3
The percentage yield of the reaction if 23.1 grams of FeCl₃ is created by 10.61g of Fe is 74.9 %.
What is percent yield?Percent yield of a reaction is the ratio of actual yield to the theoretical yield multiplied by 100.
As per the given balanced reaction, one mole or 55.85 g of Fe is needed to produce 1 mole or 162.2 g of FeCl₃.
Then theoretically, the mass of FeCl₃ which can be produced by 10.61 g of Fe is calculated as follows:
= (10.61 × 162.2) / 55.85
=30.81 g
This is the theoretical yield.
The actual yield is given 23.1. Now the percentage yield is calculated as follows:
Percentage yield = (Actual yield/ heretical yield)×100
= (23.1/30.81)×100
= 74.9 %.
Hence, the percentage yield of the reaction is 74.9 %.
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Calculate the entropy change for the gas. (2b)Calculate the entropy change when 14 g of nitrogen expand from a volume of 10 L to a volume of 30 L at the same temperature. Assuming ideal behaviour for the nitrogen gas
Explanation:
because T is const so
deltaS=Q/T=nRLn(V2/V1)
=(14/28)x8.314xLn(30/10)=4,567 J/k
What’s a nonmetal that gains 3 electrons to be stable like neon
Answer:
Phosphorus would be the correct answer I guess
What feature of living things do the terms unicellular and multicellular describe ?
a. how they are organized
b. how they reproduce
c. how they maintain temperature
d. how they produce macromolecules
Answer:
The term unicellular and multicellular describe how living things are organized.
Explanation:
The number of cells in living things determine how the body organization will be.
Living things are made up of cells in which there are two types of living cells. We have the unicellular and multicellular cells.
The unicellular are made up of one cell (single cell) the unicellular organisms are simple cells which make their functions simple while the multicellular organisms are made up of two or more organisms and their functions are special unlike the unicellular which the functions are simple
Explanation:
Answer:
Hey there
A) how they are organized.
Multicellular organisms are organized by being made of many cells, such as you and me. However unicellular organisms as the name suggest are made of only one cell, such as bacteria.
Convert 6.800 x 10^-3 km to cm.
Answer:
680 centimeters
Explanation:
because it is
WILL GIVE BRAINLIEST AND 20 POINTS!
A 6.0 M NaOH solution is made with 400 grams of NaOH. How much do you have?
M = mol/L
L = mol/M
Answer:
10 mol, or 1.667L
Explanation:
__mol=400gNaOH * [tex]\frac{1mol}{39.99g}[/tex]
__L=400gNaOH * [tex]\frac{1mol}{39.99g}[/tex] * [tex]\frac{1L}{6M}[/tex]
Which one are you solving for? The top is for number of moles and the bottom is number of liters. You already have the mass so you are obviously not solving for that.
Which element has the largest atomic radius?
4 be
56 ba
31 ga
9 f
Answer:
Ba
Explanation:
bc it = 268 pm
How large are dwarf galaxies compared to the Milky Way galaxy?
Answer:
A dwarf galaxy is a small galaxy composed of about 1000 up to several billion stars, as compared to the Milky Way's 200–400 billion stars
Answer:
A dwarf galaxy is a small galaxy composed of about 1000 up to several billion stars, as compared to the Milky Way's 200–400 billion stars.
Explanation:
same answer for me
Two chemical reactions are shown:
2Mg + O2 → 2MgO
CaCO3 → CaO + CO2
Which statement is true?
A. Both are synthesis reactions.
B. Both are decomposition reactions.
C. A is a synthesis reaction, and B is a decomposition reaction.
D. A is a decomposition reaction, and B is a synthesis reaction.
In the given chemical reactions, the statement that is true is A synthesis reaction, and B is a decomposition reaction. The correct option is C.
What are synthesis and decomposition reactions?Synthesis reactions are those reactions in which two reactants combine to form a single big product or compound. Like the first one reaction in which the magnesium and oxygen combine to create two moles of magnesium oxide. A + B = AB. When
Decomposition reactions are those reactions in which one reaction or compound breaks down to comprise two smaller products. Like the second reaction, calcium chloride breaks down into calcium oxide and carbon dioxide. AB = A + B.
Thus, the correct option is C. A is a synthesis reaction, and B is a decomposition reaction.
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Please help me with this question it’s really confusing and I need it done in 8 minutes I’ll give you extra credit :))
Answer:
pls say the question
Answer:
i cant see anything maybe make the picture bigger,
Explanation: maybe thall help
Which of following substances would have the most attraction between its particles sliver ( a solid that melts at 960C) ethanol ( a liquid at room temperature) oxygen ( a gas at room temperature) HDPE (a solid that melts at 110)
Answer:
I have asked question in my profile please tell me the answer
Explanation:
I dont know the answer sorry