%C = 40
%H = 6.67
%O = 53.33
Further explanationGiven
Glucose C₆H₁₂O₆
Required
The percent composition
Solution
MW Gulucose = 180 g/mol
Ar C = 12 g/mol
Ar H = 1 g/mol
Ar O = 16 g/mol
%C = 6.12/180 x 100% = 40%
%H = 12.1/180 x 100% = 6.67%
%O = 6.16/180 x 100% = 53.33%
7 Coal was produced in the earth over millions of years. Which of the following is NOT a step in
the production of coal?
А Animals died and were covered by sediment.
B Plants died and were covered by sediment.
C Heat, pressure, and time change the peat to lignite.
Time and pressure changes dead plant material to peat.
D
Answer:
D. Time and pressure changes dead plant material to peat.
Explanation:
There are four steps in the production of coal: peat, lignite, bituminous and anthracite.
Peat: in this stage dead plants are oxidized to water and carbon dioxide and buried under sediments. The partial decomposition of plant matter due to the absence of oxygen is called peat. There is no factor of time and pressure that changes dead plant material to peat.
Lignite: Peat is subjected to heat, pressure, and time to form lignite.
Bituminous: More pressure in lignite removes all the traces of plant matter and form “soft coal”, bituminous coal.
Anthracite: It is the last stage, in which hard coal forms with the combined pressure and high temperature.
Hence, the correct answer is "D. Time and pressure changes dead plant material to peat."
HELPPP!!!!!!!!!!!! ty
Answer:
increases
Explanation:
it turns out that an object increases as the square of it's speed.
Answer:
Explanation:
In all physical processes taking place in closed systems, the amount of change in kinetic energy is equal to the amount of change in potential energy. If the kinetic energy increases, the potential energy decreases, and vice-versa. this equation reveals that the kinetic energy of an object is directly proportional to the square of its speed. That means that for a twofold increase in speed, the kinetic energy will increase by a factor of four. so therfore stays the same as the object so it would speed up as well.
What natural process is best represented by
the diagram below?
Answer:
i actually dont know
Explanation:
Why do the exceptional configurations taught in this class (only 1 electron moves from an s orbital to a d orbital) happen? (choose all that apply)
Because sublevel overlap results in the d sub level of one energy level being very close to the s sublevel of the next energy level
Because full sub levels are more stable than partially filled sub levels
Because half filled sub levels are more stable than partially filled sub levels
Because electrons want to be in the largest sublevel they can find.
Answer:
Because half filled sub levels are more stable than partially filled sub levels
Explanation:
The reason for the exceptional configuration found in some atomic orbitals is due to the special stability of half-filled sub-levels over partially filled ones.
One of the characteristic thing about filling some atomic orbitals we have to bear in mind that there is a stability conferred on an atom by being partially filled.
The energy needed to remove an electron from a half-filled configuration or inert gas configuration is very great.
This is why when there is a choice to have half-filled orbitals, it is desirous to go for this configuration.
The atomic mass of an atom is the sum of:
A protons and electrons
B protons and neutrons
C electrons and neutrons
Answer:
i think b(proton and neutrons)
When convex mirrors are used for security purposes, the images they form
are real images.
A. True
B. False
Answer:false
Explanation:
What is created by the gravitational pull of the moon?
HURRY PLEASE ! I HAVE LIMIT TIME !
Answer:
Tides . hope this helps
Explanation:
the tidal force causes earth and its water to bulge out on the side closest to the moon
What makes the periodic table arrangement so unique and useful?
Can someone plz help me
Answer:
Number 1,2,and 6.
Explanation:
The base of living things and general reactions are number 1,2,6!
Hope this helps :)
This is kinda confusing for me
Answer:
Um did you post something I don't see nothing
Explanation:
What properties do ionic compounds have?
A. low boiling point and conduct electricity when dissolved in water
B. high melting point and conducts electricity when dissolved in water
C. high boiling point and conducts electricity as a solid
Answer:
High melting point
Explanation: toook the quiz
If distance, d, is proportional to time, t, and at time t =2.00 seconds, the distance is 6.20 m, find the distance when t = 3.50 s.
Calculate the number of formula units in 1.87 mol of NH4Cl
a. 1.13 x 1024 NH4Cl
b. 6.75 x 1024 NH4Cl
c. 1.12 x 1024 NH4Cl
Answer:
1.13 x 10²⁴formula units
Explanation:
Given parameters:
Number of moles of NH₄Cl = 1.87mol
Unknown:
Number of formula units = ?
Solution:
From mole concept;
1 mole of a substance contains 6.02 x 10²³ formula units
Now;
1.87 moles of NH₄Cl 1.87 x 6.02 x 10²³ = 1.13 x 10²⁴formula units
Helpppp meee plzzzzzzz
Does solubility have any unit
Answer:
Solubility may be stated in various units of concentration such as molarity, molality, mole fraction, mole ratio, mass (solute) per volume (solvent) and other units. The extent of solubility ranges widely, from infinitely soluble (without limit) ( miscible) such as ethanol in water, to poorly soluble, such as silver chloride in water.
Explanation:
Write 134 020 000 in scientific notation.
6. A student is writing a formula for Magnesium Nitrite. He knows nitrite is a polyatomic ion with a charge of -1.
Magnesium is an ion with a charge of +2. He concludes that he will need 2 nitrite ions to balance the charge
across the compound. Thus he writes the final formula as MgN,O2. Explain what he has done wrong.
Answer:
See explanation
Explanation:
First of all, the student has not represented the formula of the nitrite ion correctly. The formula of the nitrite ion is represented as NO2^- whereas the student wrote N,O2.
Then, the charge on magnesium ion has been correctly designated as +2 while the charge on the nitrite ion is correctly designated as -1. Now, the ions can exchange valencies (without signs and we now write them as subscripts) to yield Mg(NO2)2.
How would you create a negative charge?
Lori is saving money to buy a new bike. She needs $120 but has only saved 60%.
How much money has she saved so far to go towards the bike?
A series stack of alkaline cells produces 4,524 kW of power of each coll contributes 14,5 w, how many cells are in the stock? (Round to the nearest whole
number)
ОА З
B. 66
OC. 312
OD 3,205
PLEASE HELP!!!!!!!!!
Answer:
C. 312
Explanation:
Answer:
C-312
EDGE 2021
Explanation:
How many moles in 4.3 x 1024 atoms of sodium (Na)?
Answer:How many ions are in 2 moles of NaCl?
2 mol NaCl = 2 x 6.02 x 10 23 = 1.204 x 10 24 NaCl formula units 2 mol NaCl = 2 (2 x 6.02 x 10 23 )= 2 (1.204 x 10 24) = 2.408 x 10 24 atoms *2 moles of sodium chloride contains 2.408 x 10 24 ions (combination of Na + ions & Cl – ions). H
Explanation:
sorry i was running out of time
5 points
What is the name of the atom pictured here? Use a periodic table if
needed. *
Answer:
There is nothing attached to this question so I unfortunately cannot help you
Explanation:
Each time the boy breathes, he exhales 0.02231 moles of gas at STP. How many liters of gas does he exhale?
Answer:
The number of liters) the boy exhales is 0.499744 liters
Explanation:
The given parameters of how the boy breathes;
The number of moles of gas the boy exhales, n = 0.02231 moles
The condition in which the boy exhales the gas = STP = Standard Temperature and Pressure
The molar volume of a gas at STP, [tex]V_m[/tex] = 22.4 L per mole
Therefore, the volume of gas the boy exhales, 'V', is give as follows;
V = n × [tex]V_m[/tex]
By substituting the known values, we have;
V = 0.02231 moles × 22.4 L/mole = 0.499744 L
The volume of gas (the number of liters) the boy exhales, V = 0.499744 L.
How many grams of water can be produce from the complete reaction of excess nitric acid and 33.2 mL of 0.245 M lithium hydroxide solution, assuming that lithium hydroxide is the limiting reactant?
Mass of water produced : 0.146 g
Further explanationGiven
33.2 mL of 0.245 M lithium hydroxide
Required
mass of water
Solution
Reaction
HNO₃ (aq) + LiOH (aq) → H₂O (l) + LiNO₃ (aq)
mol LiOH :
= M x V
= 0.245 x 33.2 ml
= 8.134 mmol
From the equation, the mol ratio of HNO₃ : H₂O = 1 : 1, so mol H₂O = 8.134 mmol
mass H₂O :
= mol x MW
= 8.134 x 10⁻³ mol x 18 g/mol
= 0.146 g
In the experiment, you will heat up 50 grams of cold sand and 50 grams of cold water by adding hot water. Will the kind of material—sand or water—affect the temperature change? State your hypothesis.
Answer:
If sand is much denser than water, then the water will warm up faster than the sand. So yes, the kind of material—sand or water—affects the temperature change.
Explanation:
I put this as my answer :)
Good luck!! <3
Yes, the kind of material, water or sand will affect the temperature change in the experiment.
Heat produces temperature change in a body. This is one of the effects of heat. However, the extent of temperature change due to heat depends on the nature of the material. A material that has a high specific heat capacity does not undergo a large change in temperature when heat is added.
Yes, the kind of material, water or sand will affect the temperature change in the experiment. The temperature change of sand will be much higher than the temperature change in water when the same quantity of heat is added because water has a higher specific heat capacity than sand.
Learn more: https://brainly.com/question/8592296?
Salt water, like koolaid, or coffee with
sugar are all
mixtures
Answer:
yes
Explanation:
Giving brainliest pls answer I don't need explanation just answer!!
Mass of NaCl : 5.85 g
Further explanationGiven
5.3 g Sodium carbonate (Na₂CO₃)
Required
Mass of NaCl
Solution
Reaction
Na₂CO₃ + 2HCl ⇒ 2NaCl + H₂O + CO₂
mol of Na₂CO₃ (MW=106 g/mol) :
= mass : MW
= 5.3 g : 106 g/mol
= 0.05
From the equation, mol ratio Na₂CO₃ : NaCl = 1 : 2, so mol NaCl :
= 2/1 x mol Na₂CO₃
= 2/1 x 0.05
= 0.1
Mass of NaCl (MW=58.5 g/mol) :
= mol x MW
= 0.1 x 58.5
= 5.85 g
HELP ITS TIMED!!!!!!!!!!!!!!!!
1-Butyne and 2-butyne are position isomers.
Select one:
a. True
b. False
Answer:
False
Explanation:
What would you se if you looked at a grain of salt
Answer:
I'd imagine it would look like a snowflake pretty much see through and microscopic
PLEASE HELP!!!
How many grams are in 10.11 moles of sucrose?
