Answer:
When Carbohydrates are burned (decomposed ) they break down into carbon and water.
Explanation:
The formula for glucose sugar is C6H12O6 If the compound is broken down it results in
6C+6H2O six carbon atoms and six water molecules.
An experiment that illustrates this well is to pour concentrated sulfuric acid about 1/3 deep into the volume of graduated sucrose sugar in a beaker about 1/4 full
The sulfuric acid is hydrophilic it will break the sucrose sugar molecule apart. The water will rise as steam above the beaker.
The sugar will turn brown and the a black carbon cone will rise out of the sugar sulfuric acid solution. The carbon cone will rise about the top of the beaker.
This experiment shows that the carbohydrate sugar is made of only Carbon and Water.
you have a sample of 23.8 g of C2H6. how many moles of C2H6 are in the sample?
Be sure to show your work and each step is writing out clearly.
Answer:
0.791 moles are present in the sample
Explanation:
To convert mass to moles of a substance you must find the molar mass of the susbtance.
The molar mass of C₂H₆ is:
2C = 12.01g/mol*2 = 24.02g/mol
6H = 1.01g/mol*6 = 6.06g/mol
Molar mass = 24.02g/mol + 6.06g/mol = 30.08g/mol is the molar mass of C₂H₆
And the moles of 23.8g of this substance are:
23.8g * (1mol / 30.08g) =
0.791 moles are present in the sampleDraw the organic product(s) formed when CH3CH2CH2OH is treated with each reagent. a. H2SO4 e. SOCl2, pyridine i. [1] TsCl, pyridine; [2] NaSH b. NaH f. PBr3 j. POCl3, pyridine c. HCl ZnCl2 g. TsCl, pyridine d. HBr h. [1] NaH; [2] CH3CH2Br
Answer:
See answer below
Explanation:
In this case, we are treating an alcohol with different reagents to give different products. In the picture below you have the draw of each product, and here, the explanation.
a) H₂SO₄: In this case, it will promote an E1 reaction forming an alkene as product.
b) NaH: In this case, it will promote an acid base reaction, and the final product will be an alcoxide.
c) HCl/ZnCl₂: In this case, primary alcohols reacts with this reactive to form an alkyl halide.
d) HBr: Another reaction forming an alkyl halide with bromine in this case.
e) SOCl₂: Similar to c), it will form an alkyl chloride.
f) PBr₃: Similar to d, forming an alkyl bromide.
g) TsCl: Here it will be a sustitution reaction, where tosilate replaces the OH
h) NaH/CH₃CH₂Br: In this case it will form an alcoxide and then, a larger alkyl.
i) TsCl/NaSH: First it will form a tosilate and then, the SH group. A sustitution reaction.
j) POCl₃: A sustitution reaction forming an alkyl chloride.
See picture below for drawings.
Hope this helps
What are the characteristics of a gas?
A. no definite shape but a definite volume
B. a definite shape but no definite volume
C. a definite volume and definite shape
D. no definite shape or definite volume
Answer:
D. no definite shape or. definite volume
Explanation:
Gases do not have a definite shape or volume because the molecules in gases are very loosely packed, they have large intermolecular spaces and hence they move around. The particles of solid are closely packed and occupy less space while particles of gases are loosely packed and occupy the complete space available.
name two objects which are hard to touch
Answer:
Name of two hard objects is Brick and Wood.
fire and mercury
i think i am not sure
but pls brainlist
How many formula units of CaO are in 32.7 g of CaO?
A) 0.58 formula units
B) 1.96 x 1025 formula units
C) 56.08 formula units
D) 3.51 x 1023 formula units
Answer:
D) 3.51x10²³ formula units
Explanation:
To know this, we need to calculate the molecular mass of CaO. To do that, let's use the atomic mass of each element of this compound.
Ca: 40.08 g/mol; O: 16 g/mol
With these given AM, let's calculate the molar mass of CaO:
Mm CaO = 40.08 + 16 = 56.08 g/mol
Now that we have the MM of CaO, it's time to determine the moles of CaO:
moles = mass / MM
moles = 32.7 / 56.08 = 0.5831 moles
Finally to get the formula units, we need to use the Avogadro's number which is 6.02x10²³. According to this number, 1 mole of any substance has this number of atoms, molecules or formula units. So, if we have 0.5831 moles, then the formula units will be:
FU = 0.5831 * 6.02x10²³
FU = 3.51x10²³ formula unitsHope this helps
1.572x108 Troy oz of silver were used in the us in 1980 how many kilograms is this
Answer: 4873200 kg
Explanation:
Given mass: [tex]1.572\times 10^8[/tex] troy oz
Conversion factor : [tex]1troyoz=0.031kg[/tex]
Thus if 1 troy oz weighs in kg = 0.031 kg
[tex]1.572\times 10^8[/tex] troy oz will weigh in kg =[tex]\frac{0.031}{1}\times 1.572\times 10^8=0.04873\times 10^8kg[/tex]
Thus there are [tex]0.04873\times 10^8kg[/tex] in [tex]1.572\times 10^8[/tex] troy oz of silver used.
Calculate acetic acid needed to make a 35 mM solution in 1 L.
Note: 35 mM = 0.035 M = 0.035 mol/L.
1. Calculate how many moles you need for 1L.
2. Calculate how many grams of acetic acid that is.
3. Use the density of the glacial acetic acid, 1.05 g/mL, to calculate how many mL you
will need to use. Show your instructor or TA this calculation in your notebook to make
sure you have the correct answer before going forward.
Answer:
1. 0.035 mole
2. 2.1 g
3. 2 mL
Explanation:
From the question given above, the following data were obtained:
Molarity of acetic acid = 0.035 mol/L.
1. Determination of the number of mole of acetic acid needed.
Molarity of acetic acid = 0.035 mol/L.
Volume of solution = 1 L
Mole of acetic acid =?
Molarity = mole /Volume
0.035 = mole / 1
Mole of acetic acid = 0.035 mole
2. Determination of the mass of acetic acid, CH₃COOH.
Mole of CH₃COOH = 0.035 mole
Molar mass of CH₃COOH = 12 + (3×1) + 12 + 16 + 16 + 1
= 12 + 3 + 12 + 16 + 16 + 1
= 60 g/mol
Mass of CH₃COOH =?
Mole = mass / Molar mass
0.035 = Mass of CH₃COOH / 60
Cross multiply
Mass of CH₃COOH = 0.035 × 60
Mass of CH₃COOH = 2.1 g
3. Determination of the volume.
Mass = 2.1 g
Density = 1.05 g/mL
Volume =?
Density = mass / volume
1.05 = 2.1 / volume
Cross multiply
1.05 × volume = 2.1
Divide both side by 1.05
Volume = 2.1 / 1.05
Volume = 2 mL
How much volume would a sample of galena have it its mass was 300 grams?
Answer:
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read carefully and do this questions all part all questions if someone do this questions I will make you brainly and give you thanks.
Answer:
Question 1.
a. the product of the reaction above that contains calcium is calcium chloride, CaCl₂.
b. the reactant, hydrochloric acid, HCl contains hydrogen
c. the product water, H₂O contains hydrogen
d. the reactant, calcium carbonate, CaCO₃ contains carbon
e. The product carbon (iv) oxide contains carbon
Question 2:
a. atoms of hydrogen and oxygen bonded together as a single compound known as water molecules are present at the start of the reaction
b. two molecules of water are present at the start of the reaction
c. two individual atoms of hydrogen and oxygen existing as molecules are present at the end of the reaction.
d. at the end of the reaction, two molecules of hydrogen and one molecule of oxygen are present.
Question 3:
a. total mass of products = 187 g
b. if Chinua starts with 10 g of magnesium, the same 10 g of magnesium will be found in the magnesium sulfate
Explanation:
Question 1: The equation of the reaction between calcium carbonate and hydrochloric acid is given as follows: + 2HCl ---> CaCl₂ + H₂O + CO₂
a. the product of the reaction above that contains calcium is calcium chloride, CaCl₂.
b. the reactant, hydrochloric acid, HCl contains hydrogen
c. the product water, H₂O contains hydrogen
d. the reactant, calcium carbonate, CaCO₃ contains carbon
e. The product carbon (iv) oxide contains carbon
Question 2: the equation of the reaction in which water is broken down to hydrogen and oxygen is as follows: 2H₂O ----> 2H₂ + O₂
a. atoms of hydrogen and oxygen bonded together as a single compound known as water molecules are present at the start of the reaction
b. two molecules of water are present at the start of the reaction
c. two individual atoms of hydrogen and oxygen existing as molecules are present at the end of the reaction.
d. at the end of the reaction, two molecules of hydrogen and one molecule of oxygen are present.
Question 3: The equation of the reaction between magnesium and sulfuric acid is given as follows: Mg + H₂SO₄ ---> MgSO₄ + H₂
molar mass of Mg = 24.0 g; molar mass of H₂SO₄ = 98.0 g
a. when 37.0 g of magnesium is reacted with 150 g of H₂SO₄, the total mass of products of the reaction is equal to the total mass of the reactants according to the law of conservation of mass.
Total mass of products = 150 + 37 = 187 g
b. if Chinua starts with 10 g of magnesium, the same 10 g of magnesium will be found in the magnesium sulfate
define alkylenes and alkanes
Answer:
Alkylenes: any of the series of unsaturated hydrocarbons containing a triple bond, including acetylene.
alkanes: Alkanes are organic compounds that consist entirely of single-bonded carbon and hydrogen atoms and lack any other functional groups. Alkanes have the general formula CnH2n+2 and can be subdivided into the following three groups: the linear straight-chain alkanes, branched alkanes, and cycloalkanes.
Explanation:
Sugar
O2
CO2
H2O
What is the name of this energy pathway?
thnxx for free point? ?????????
How many atoms are in 2.5mol of sodium
Answer:
1024 sodium atoms.
Your family as an old apple tree in your backyard Your mom loves using the tree's apples to make pies. You don't care for apples ,but you enjoy reading under the tree's shade Which phrase bost describes the ecosystem services that the tree provides for you and your mom?
only and aesthetic services and direct services
only indirect services
indirect and direct services
Only ethical and aesthetic services
Answer:
ethical and aesthetic services and direct services
Explanation:
I just took the test and it's NOT indirect services and direct services like the other person said. It's ethical and aesthetic services and direct services.
What happened to Mendeleev's mother after he was accepted into St. Petersburg University?
Answer:
his mother died i think
Explanation:
Although he was not accepted, his mother was determined to give her son a first-class education and they walked to St. Petersburg. Dmitri was accepted into the Institute of Pedagogy on a full scholarship. That same year his mother died and at the age of sixteen, Dmitri was orphaned.
The vapor pressure of liquid hexane, C_6 H_14, is 40.0 mm Hg at 271 K. A sample of C_6 H_14 is placed in a closed, evacuated container of constant volume at a temperature of 400 K. It is found that all of the C_6 H_14 is in the vapor phase and that the pressure is 74.0 mm Hg. If the temperature in the container is reduced to 271 K, which of the following statements are correct? Choose all that apply. a) Liquid hexane will be present. b) Some of the vapor initially present will condense. c) Only hexane vapor will be present. d) No condensation will occur. e) The pressure in the container will be 50.1 mm Hg.
Answer:
Only Options (c), (d) and (e) are correct.
Explanation:
Without mincing words let's dive straight into the solution to the question above.
The following parameters from the question are given below which are going to aid in solving this question.
=> The vapor pressure of liquid hexane = 40.0 mmHg, Temperature, T1 = 271K.
=> The temperature, T2 = 400 K, the pressure,P2 = 74.0 mm Hg. The reduced temperature,T3 in the container = 271 K.
What is needed now is to Determine the final temperature, T3 = 271/400 × 74 = 50.01 mmHg.
Therefore, we only have the presence of the vapour of Hexane and there is no condensation. Hence, option c, d and e are the only correct options.
Hydrocarbons (not to be confused with carbohydrates) are molecules containing only carbon and hydrogen atoms. Examples include methane (CH4) and benzene (C6H6). How many hydrogen atoms are present in a linear hydrocarbon chain of nine carbons joined to each other by single covalent bonds? Hint: remember you need to satisfy the octet rule for each carbon.
Answer:
20 hydrogen atoms
Explanation:
Let us carefully observe the words of the question. We were told that the compound is a hydrocarbon. This implies that it is composed of only hydrogen and carbon.
Secondly, we are informed that the compounds is composed of only C-C single covalent bonds. This means that the compound is an alkane.
Then we are told that it contains nine carbon atoms and is a linear molecule. Hence, the compound must be n-nonane.
Recall that for alkanes, the general molecular formula is CnH2n+2 Substituting n=9 for nonane we have; C9H(2*9)+2 which is C9H20.
Thus there are 20 hydrogen atoms. The structure of the compound is attached to this answer
Where and how does respiration take place
Answer:
Glucose and oxygen react together in cells to produce carbon dioxide and water and releases energy. The reaction is called aerobic respiration because oxygen from the air is needed for it to work. Energy is released in the reaction. The mitochondria , found in the cell cytoplasm, are where most respiration happens.
What are three forms of the element carbon?
Answer:
There are at least eight forms of carbon: amorphous, graphite, diamond, fullerenes, aggregated diamond nanorods, carbon nanofoam, glassy carbon, and linear acetylenic carbon.
Explanation:
choose a spot outside or inside your house as your reference point. it may be a trer ,bench,cabinet,refrigerator,pr sink.
Answer:
I choose my table
The planets in the solar system revolve around the sun because the sun is
Answer:
Newton realized that the reason the planets orbit the Sun is related to why objects fall to Earth when we drop them. The Sun's gravity pulls on the planets, just as Earth's gravity pulls down anything that is not held up by some other force and keeps you and me on the ground.
is this right someone please help asap photo attached above
A spider has several eyes.
What is the main function of these organs?
I’ll give y’all 100 points
Answer:
it is d
Explanation:
Answer: d
Explanation: i think that answer
How many moles of H2 would be formed from 2.26 mol of HCI?
Mg + _HCI → _MgCl2 + H2
Answer:
2.6 moles of HCl will produce moles of H2 = [tex]1.3[/tex]
Explanation:
Mass of HCl is 36.458 g/mol
Mass of Hydrogen is 1.00794 g/mol
The balanced equation here is
Mg + 2_HCI → _MgCl2 + H2'
2 moles of HCl produces one mole of H2
One mole of HCl will produce moles of H2 = [tex]\frac{1}{2}[/tex]
2.6 moles of HCl will produce moles of H2 = [tex]\frac{1}{2} * 2.6 = 1.3[/tex]
What was the main purpose of the opportunity rover?
Answer:
Explanation:The major goals of the two rovers, according to NASA, were to determine whether life as we know it could ever have arisen on Mars (focusing particularly on searching for ancient water) and characterizing the climate and geology of
Answer:
The major goals of the two rovers, according to NASA, were to determine whether life as we know it could ever have arisen on Mars (focusing particularly on searching for ancient water) and characterizing the climate and geology of the planet
Based upon the percent yield you calculated, what is one source of error, and the resulting of that error in your experiment.
Select the option corresponding to the following choices
a. When decanting, some solid was lost, resulting in less copper recovered and a lower % yield
b. When decanting, some solid was lost, resulting in more copper recovered and a higher % yield
c. When drying over the steam bath, did not let the sample dry completely, resulting in a higher mass of copper recovered, and a higher % yield.
d. When drying over the steam bath, did not let the sample dry completely, resulting in a lower mass of copper recovered, and a lower % yield.
Answer:
The answer is "Choice a".
Explanation:
In the given question, through the basis of their determined percentage yield, a smaller copper increase in value and less copper has been lost during decanting, but now this mistake in your experiment was the cause of confusion, and the wrong choice can be defined as follows:
In point b, it is wrong because A few other solids were not lost during decanting, resulting in a higher recovery of copper as well as a boost in the percentage yieldIn point c, it is wrong because whenever the vapor bath was dried, the specimen did run dry totally, which did result in such a heavier density of copper and a larger percentage of the yield.In point d, it is wrong because whenever the vapor bath was dried, the sample was fully dried, which also resulted in much less adhesive weight and a much less percentage of the yield.PLEASE HURRY IM TIMED Which of the following are examples of physical changes? (Select all that apply.)
tearing a piece of paper
a nail rusting
crushing a soda can
Answer:
Explanation:
tearing a piece of paper
crushing a soda can
A rock face at the top of a mountain is composed of layers in which seashells are embedded. This type of rock is
Answer:
Sedimentary rock.
Explanation:
When limestone form as ocean water evaporates and leaves calcium carbonate behind, they are then deposited in the seabed. Thus, the type of rock that can be formed this way is a sedimentary rock.
The texture of organic land-derived sedimentary rocks is fragmental or clastic. Sediments come from living organisms such as plants and animals to form organic sedimentary rocks.
Some examples of inorganic land-derived sedimentary rocks are conglomerate, brescia and sandstone.
In this scenario, a rock face at the top of a mountain is composed of layers in which seashells are embedded. This type of rock is a sedimentary rock.
what is the formula for the polyatomic ion and name the following compound
Sn(NO2)2
The chemical formula for the polyatomic ion is NO₂⁻ and name of the following compound is tin (II) nitrite.
Chemical formula is a way of representing the number of atoms present in a compound or molecule.It is written with the help of symbols of elements. It also makes use of brackets and subscripts.
Subscripts are used to denote number of atoms of each element and brackets indicate presence of group of atoms. Chemical formula does not contain words. Chemical formula in the simplest form is called empirical formula.
There are four types of chemical formula:
1)empirical formula
2) structural formula
3)condensed formula
4)molecular formula
Learn more about chemical formula,here:
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12 Calculate the volume of concentrated sulphuric acid (density 1.84 g/mL), containing 98.0% H2SO4 by mass, that
would contain 40.0g pure H2SO4.
A 32.2mL B 52.2mL C 22.2mL D 42.2mL
Answer:a
Explanation:
ddk
Please HELP!!! Automotive airbags inflate when sodium azide decomposes explosively to its constituent elements. How many grams of sodium azide are required to produce 24.4 L of nitrogen gas at standard temperature and pressure? 2NaN3 --> 2Na + 3N2
47.2 g of sodium azide
106.2 g of sodium azide
1.63 g of sodium azide
0.726 g of sodium azide
Answer: 47.2 g of sodium azide
Explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
To calculate the moles, we use the equation:
[tex]\text{Number of moles of nitrogen}=\frac{\text{Given volume}}{\text {Molar volume}}=\frac{24.4L}{22.4L}=1.09moles[/tex]
The balanced chemical reaction is:
[tex]2NaN_3\rightarrow 2Na+3N_2[/tex]
According to stoichiometry :
3 moles of [tex]N_2[/tex] are produced by = 2 moles of [tex]NaN_3[/tex]
Thus 1.09 moles of [tex]N_2[/tex] are produced by =[tex]\frac{2}{3}\times 1.09=0.73moles[/tex] of [tex]NaN_3[/tex]
Mass of [tex]NaN_3=moles\times {\text {Molar mass}}=0.73moles\times 65g/mol=47.2g[/tex]
Thus 47.2 g of sodium azide are required to produce 24.4 L of nitrogen gas at standard temperature and pressure