Answer:
Explanation:
How many atoms are in a 3.5 g sample of sodium (Na)? In this example, multiply the grams of Na by the conversion factor 1 mol Na/ 22.98 g Na, with 22.98g being the molar mass of one mole of Na, which then allows cancelation of grams, leaving moles of Na.
Answer:
ONE MOLE of any element has 6.023x1023 atoms of that element. Therefore 1 mole or 22.99 grams of Na = 6.023x1023 atoms of Na.
Explanation:
in a hotel breakfast bar you see an older woman sticking a fork into a toaster to remove a piece of toast. You wamn her not to do that and she says. "You know, I always
wondered why fortes conduct electricity so well" As an astute chemistry student how would you explain it to her? Make sure you provide a relationship to
electronegativity proton pull and electron distribution in your answer
Answer: I guess have to like explain to her why to not stick the fork into the toaster.
Explanation:
Hope this helps
Answer:
its just how would you explain how it happens how the electricity passes through the fork but in a easy understandable way
Explanation:
for example... dont do that because......................then will go through the fork then to your arm and will cause....................... then you die
The theory of continental drift, a theory of a single, massive landmass that may have broken apart into what we associate with the modern landmasses and major continents was first supported by what significant evidence?
Answer:
So its a theory by Alfred Wegener is that All land was one big piece of land called pangea in the early 20th century people began to think that land masses can move such as many do just from it being there or natural disasters then going in to more research they found that when putting the continents together it fit like a puzzle and the fact that some fossils were far away from were the same were found
The theory of continental drift, based their theory on several lines of evidence, including the fit of the continents, paleoclimate indicators, truncated geologic features, and fossils.
What does the continental drift theory?The continental drift hypothesis states that all the continents were once joined together as one large mass of land, but then the land spread apart and drifted into their current positions.
The hot magma flows in convection currents due to tremendous heat and pressure within the earth. These currents cause the tectonic plates that make up the earth's crust to move.
Thus, The theory of continental drift, based their theory on many lines of evidence, including the fit of the continents, paleoclimate indicators, truncated geologic features, and fossils.
To learn more about continental drift theory, follow the link;
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Balance the equation for ethane C3H6 burning in oxygen to form carbon dioxide and steam. _____C3H6 + ____ O2 ---> CO2 + ____H2O
Answer:
2C3H6 + 9 O2 ---> 6 CO2 + 6 H2O
Explanation:
Which victim requires CPR?*
Unresponsive, has strong pulse, and is breathing
unresponsive, no normal breathing and no pulse
Responsive, has a pulse, and having trouble breathing
O Responsive, having trouble breathing, and has a low pulse
Answer:
Responsive, having trouble breathing, and has a low pulse
Explanation:
Two gases are combined and sealed in a 2.0 L container. The 3.0 L of argon gas and 1.0 L of xenon gas each exert 1.00 atm pressure on the walls of their container.
(a) Calculate the partial pressure of each gas in the 2.0 L container.
(b) What is the total pressure in the 2.0 L container?
Answer:
Unless they chemically react with each other, the individual gases in a mixture of gases do not affect each other’s pressure. Each individual gas in a mixture exerts the same pressure that it would exert if it were present alone in the container . The pressure exerted by each individual gas in a mixture is called its partial pressure.
Explanation:
just take it for free,
Answer:
Thanks bro, I will gladly take them for free
(05.02 LC)
How many moles of each element are in one mole of Sr(HCO3)2? (3 points)
Answer:
The number of moles of Sr in one mole of Sr(HCO₃)₂ = 1 mole
The number of moles of H in one mole of Sr(HCO₃)₂ = 2 moles
The number of moles of C in one mole of Sr(HCO₃)₂ = 2 moles
The number of moles of O in one mole of Sr(HCO₃)₂ = 6 moles
Explanation:
The given chemical formula of the compound is Sr(HCO₃)₂
The number of atoms of Sr in the compound = 1
The number of atoms of H in the compound = 2
The number of atoms of C in the compound = 2
The number of atoms of O in the compound = 6
The number of atoms of each element present in each formula unit of Sr(HCO₃)₂ is proportional to the number of moles of each atom in one mole of Sr(HCO₃)₂
Therefore;
The number of moles of Sr in one mole of Sr(HCO₃)₂ = 1 mole
The number of moles of H in one mole of Sr(HCO₃)₂ = 2 moles
The number of moles of C in one mole of Sr(HCO₃)₂ = 2 moles
The number of moles of O in one mole of Sr(HCO₃)₂ = 6 moles.
Answer:
the answer above is correct
Explanation:
i took the test
PLEASE HELP ME I DON'T UNDERSTAND PLEASE HELP THIS IS MY LAST QUESTION I WILL GIVE BRAINLIEST
You have learned about the common characteristics of inner planets and outer planets. Explain how these
characteristics are verified observation and not just the options of scientists.
Answer:
Because they all have different characteristics and they are not just things that the scientists say. they are all different but some of them have the Same charateristics
What is the approximate total number of atoms in 1.0 mole of lithium?
Answer:
6.0 x 10 to the power of 23
The geocentric theory was once accepted as an explanation of how objects were positioned in our solar system. Which statement best explains this theory?
A The orbits of the planets are elliptical and not circular
B The Sun is considered to be the center of the Universe
C Earth is considered to be the center of the revolving planets and stars
D The Sun is considered to be the center of the revolving planets and stars
Answer: c
Explanation:
How many mols is 8.86 x 1023 atoms of silver?
Answer:
1.44moles
Explanation:
Given parameters:
Number of atoms = 8.86 x 10²³atoms
Unknown:
Number of moles = ?
Solution:
From the mole concept;
Number of moles = [tex]\frac{number of atoms }{6.02 x 10^{23} }[/tex]
Number of atoms = 8.86 x 10²³atoms
Number of moles = [tex]\frac{8.68 x 10^{23} }{6.02 x 10^{23} }[/tex]
Number of moles = 1.44moles
a) How much energy would be required to melt 500 grams of ice at 0°C to water at 0°C?
Heat required = Q = 40 kcal
Further explanationGiven
mass of 500 g ice
Required
Heat required
Solution
The heat to change the phase can be formulated :
Q = m.Lf (melting/freezing) Q = m.Lv (vaporization/condensation)Lf=latent heat of fusion
Lv=latent heat of vaporization
Lf for water = 334 kj/kg=6.01 kJ/mol = 80 cal/g
Phase change(ice to water)
Q= 500 g x 80 cal/g
Q = 40 kcal
What mass of aluminum is produced by the decomposition of 5.0 kg A l 2O 3? How many moles of oxygen are produced?
mass of Aluminum produced = = 2.647 kg
moles of Oxygen = 73.53 moles
Further explanationGiven
5.0 kg Al₂O₃
Required
moles of Oxygen
Solution
The aluminum oxide gets decompose into aluminum and oxygen gas.
Reaction :
2Al₂O₃(s)⇒ 4 Al(s) + 3O₂(g)
mol of Al₂O₃(MW=102 g/mol) :
= mass : MW
= 5000 g : 102 g/mol
= 49.02 moles
From the equation, mol ratio of Al₂O₃ : O₂ = 2 : 3, sol mol O₂ :
= 3/2 x mol Al₂O₃
= 3/2 x 49.02
= 73.53 moles
mol Al :
= 4/2 x mol Al₂O₃
= 2 x 49.02
= 98.04 moles
Mass Al :
= mol x Ar Al
= 98.04 x 27 g/mol
= 2647.08 g
= 2.647 kg
Given the following data, calculate the densities of a carbon-14 nucleus and a carbon-14 atom. Particle Mass Electron kg Proton kg Neutron kg The diameter of the nucleus is about cm and electrons move about the nucleus at an average distance of about cm away from it. (a) Calculate the density of a carbon-14 nucleus. Density
If the number of atoms of each element on the reactant side of an equation is equal to the number of atoms of each element on the product side of the equation, the equation is _____.
A.)endothermic
B.)equal
C.)balanced
D.)exothermic
Which is smaller: a
chromosome or a gene?
Answer:
A gene is smaller.
Explanation:
A gene is actually inside of a chromosome, therefore it's a smaller entity.
;
Genes are contained in chromosomes, which are in the cell nucleus. A chromosome contains hundreds to thousands of genes.
Answer: genes
Explanation: Genes are smaller because they are in the chromosomes.
Voltalc cells produce a positive overall charge. What does this indicate?
OA. The reaction is likely to be endothermic.
OB. The reaction is spontaneous.
OC. The reaction is not likely to occur.
OD. The reaction is not spontaneous.
Answer:
The reaction is spontaneous.
Explanation:
If voltaic cell show positive charge it means reaction is spontaneous taking by itself.
Answer:
B. The reaction is spontaneous.
Explanation:
Edmentum
A farmer selectively breeds tomatoes to be shipped to grocery stores across the United States. Which of the following genetic traits would it be most important to selectively breed in the tomatoes?
A.The spoiling time of the tomatoes
B.The flavor of the tomatoes
C.The appearance of the tomatoes
D.The size of the tomato plants' leaves
Answer:
D
Explanation:
It would definitely affect size because breeding will change that trait
In selectively breeding tomatoes to be transported around the united states, one must consider the spoiling time of the tomatoes.
Tomatoes are vegetable fruits that are commonly consumed across the world and are very important because of their nutritive value. Often times, tomatoes are regarded as perishable goods because of their short shelf life.
In selectively breeding tomatoes to be transported around the united states, one must consider the spoiling time of the tomatoes.
Learn more about tomatoes:https://brainly.com/question/8908511
HELP PLZ ASAP
will give brainliest
Answer:
I believe that it would be the third option down.
Explanation:
The thermal energy is in constant motion in the COOLER room, and when the desired temperature in the room is reached, it stops.
A hot plate, a large beaker of water, and grains of rice are used in a class demonstration. When the water begins to boil, the rice moves in a circular pattern. The model demonstrates
Answer:radiation
Explanation:
When the water begins to boil the rice moves in a circular pattern which means radiation will be the correct answer
Name three things that are matter and why
When a student squeezes a balloon, it changes shape. In which state of
matter is the substance inside the balloon?
Answer:
gas
Explanation:
Answer:
Liquid and gas
Explanation:
In Mg3(PO4)2 there are
In Mg3(PO4)2 there are 13 atoms
Further explanationGiven
Mg3(PO4)2 compound
Required
The composition of the compound
Solution
Molecular formula (MF) is a formula that shows the number of atomic elements that make up a compound.
In the compound Mg3 (PO4) 2, there are 3 types of atoms, namely Mg, P, and O
The number of each of the atoms:
Mg = 3 atoms
P = 2 atoms
O = 8 atoms
Total atoms in the compound = 3 + 2 + 8 = 13 atoms
Ice melting in a glass of iced tea is an example of a(n) __________ process (not necessarily a chemical reaction).
How many significant figures does 0.058 040 have?
a.6
b.7
c.5
d.4
Answer: c 5 because you don’t start counting until it hits a number >0 if it’s to the left of a decimal
Explanation:
TEST QUESTION PLS HELP What are isotopes? Write isotopes of three different elements, showing their atomic number and mass number. (I'll give brainliest)
Answer:
Isotopes are members of a family of an element that all have the same number of protons but different numbers of neutrons. The number of protons in a nucleus determines the element's atomic number on the Periodic Table
Explanation:
Hope this helps some? :)
which is NOT balanced?
WILL GIVE BRAINLIEST
Answer:the third one hope this helped u may i plz get brainlist only if u wanna give me brainlist though have an good day kind sir or ma'ma.
Explanation:
if you have 3g of sodium and 4g of chlorine what is the total mass of sodium chloride
Answer:
7g
Explanation:
Given parameters:
Mass of sodium = 3g
Mass of chlorine = 4g
Unknown:
Total mass of sodium chloride = ?
Solution:
This problem entails the direct application of the law of conservation of mass. According to this law, it states that "matter is neither created nor destroyed in the course of a chemical reaction".
So, when sodium and chlorine combines to form sodium chloride, to are expect to produce substance with a mass which adds up to the sum of the reactants;
Mass of sodium chloride = mass of sodium + mass of chlorine
= 3g + 4g
= 7g
Define conversion factor
When 4.15 grams of silver nitrate is reacted with 1.11 grams of iron(III) chloride, which best represents the amount of silver chloride produced?
Answer:
The mass of silver chloride produced = 2.202 g
Explanation:
Equation of the reaction is given below
3AgNO₃(aq) + FeCl₃(aq) ----> 3AgCl(s) + Fe(NO₃)₃(aq)
molar mass of AgNO₃ = 170 g/mol
molar mass of FeCl₃ = 233.5 g/mol
molar mass of AgCl = 143.5 g/mol
3 moles of silver nitrate reacts with 1 mole of iron (iii) chloride to give 3 moles of silver nitrate
4.15 grams of AgNO₃ = 4.15/170 = 0.0244 moles of AgNO₃
1.11 grams of FeCl₃ = 1.11/233.5 = 0.0047 moles of FeCl₃
mole ratio of AgNO₃ to FeCl₃ = 0.0244/0.0047 = 5 : 1
therefore, FeCl₃ is the limiting reactant
0.0047 moles of FeCl₃ reacting will produce 0.0047 * 3 moles of AgCl = 0.0141 moles of AgCl
0.0141 moles of AgCl = 0.0141 * 143.5 g of AgCl = 2.02 g of AgCl =
Therefore mass of silver chloride produced = 2.202 g
