Answer: 0.0016 moles of copper are present in copper gluconate
Explanation:
The number of moles is defined as the ratio of the mass of a substance to its molar mass.
The equation used is:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] ......(1)
Given mass of copper = 0.1 g
Molar mass of copper = 63.55 g/mol
Plugging values in equation 1:
[tex]\text{Moles of copper}=\frac{0.1g}{63.55g/mol}=0.0016 mol[/tex]
Hence, 0.0016 moles of copper are present in copper gluconate
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What is the gram molecular mass of a compound if 5 moles of the compouns has a mass of 100 grams?
Answer:
20 grams.
Explanation:
5 mols of a compound has a mass of 100 grams
1 mol of the same compound has a mass of 100/5 = 20 grams
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distilling ethanol from a wine to determine the percentage of alcohol in a wine uses what type of property
physical property
bonding property
homeowner's property
Answer:
Bonding property
Explanation:
Distillation deals with boiling solutions. Therefore the boiling point has a major part to play. Boiling point of a substance deals with the type of bonds present. For example water has hydrogen bonding which is a weak intermolecular force therefore the boiling point of water isn't that high. If we were to focus on an ionic compounds the boiling point would be higher because ionic compounds have ionic bonding which are stronger bonds which therefore requires more energy to break those bonds therefore a higher boiling point.
In this case for the ethanol to distill the property it's focusses on is the bonds. The strength of the bonds really.
I'm having trouble with this one
Answer:
1) 7 moles
2) 82.4 grams approximately
What type of molecule is shown below?
A. Ether
B. Alcohol
C. Aldehyde
D. Ketone
The given molecule is an aldehyde with the formula HCHO. It is the simplest and primary aldehyde . Hence, option c is correct.
What are aldehydes ?Aldehydes are a class of organic compounds that contain a carbonyl group (a carbon double-bonded to an oxygen) at the end of a carbon chain. The general formula for an aldehyde is RCHO, where R is a substituent or side chain attached to the carbonyl group.
Aldehydes are often characterized by their distinctive odor, which can be described as pungent and irritating. Some common aldehydes include formaldehyde (used in building materials and as a disinfectant), acetaldehyde (found in alcoholic beverages), and benzaldehyde (used in food flavorings).
Aldehydes are important intermediates in many chemical reactions, and they are used in a variety of industrial and laboratory applications. They can be synthesized by the oxidation of primary alcohols or by the partial oxidation of hydrocarbons. The given compound is formaldehyde HCHO.
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Explain, in terms of particles, why liquid
iodine does not conduct electricity.
Answer:
Because iodine is a liquid, it has no melting point. Iodine is not an electrical conductor because each molecule consists of two iodine atoms connected by a covalent bond that cannot be stimulated sufficiently to transmit electrical energy.
Explanation:
brainlist???
Explanation:
Because in an aqueous solution of iodine, iodine atoms are joined to each other by simple covalent bonds. Thus, when excitation occurs, the strength of the covalent bond is too weak to be able to transfer electrons, thus lacking the ability to conduct electricity.
In which classification of matter are the components chemically combined?
A metal
B compound
C mixture
D Metalloids
Please somone help me with a chemistry question brainliest to whoever answers correctly and 20 points
Answer:
289.15k is the answer buddy
Which row represents an ion?
number of
protons
number of
neutrons
number of
electrons
А
1
0
1
B
3
4
3
C С
6
6
6
D
11
12
10
Answer:
12123456789012347698
How many atoms are there in total in a molecule of sulfur trioxide SO3??
Answer:
I got 1.14 mol So3 as the answer
hopefully if this could help
How many molecules of water vapor participate in the above reaction if 90 g of water vapor are available?
Answer:
can I see the reaction plz before I answer the question
Enzymes are proteins that speed up chemical reactions in the body.
How do they work?
A) They provide a path with lower activation energy.
B) They increase the concentration of reactants.
C) They decrease the concentration of products.
D) They increase the surface area of reactants.
Answer:
D. They Increase the surface area of reactants.
Explanation:
And why I say the answer is D, Because Enzymes are soluble protein molecules that can speed up chemical reactions in cells
When Enzymes are proteins that speed up chemical reactions in the body so here it increase the surface area of reactants. hence, option d is correct.
What are enzymes?It is the substance that is treated as the catalyst in the living organism.
In this, the biological process arises within the living organism are considered to be the chemical reactions.
Also, enzymes should be soluble protein molecules that speed up the chemical reaction in cell.
hence, the option d is correct.
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How many moles of sucrose
are in 5.25x1029 sucrose
molecules? (in scientific notation)
Answer:
8.72 × 10^5 moles
Explanation:
To find the number of moles in 5.25 x 10^29 molecules of sucrose, we divide the number of molecules by Avagadro constant (6.02 × 10²³ molecules). That is;
no. of moles = no. of molecules ÷ 6.02 × 10²³ molecules
In this case of sucrose, no of moles contained is as follows;
5.25 × 10^29 ÷ 6.02 × 10²³
5.25/6.02 × 10^ (29-23)
0.872 × 10^6
= 8.72 × 10^5 moles
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how many moles are in 150 grams of water
Answer:
Solution given:
H20=1+1+16=18grams
we have
1 mole of water =18grams
now
150grams of water=1/18*150=25/3 =8.33mole.
150 grams of water =8.33mole.
Note:
mole =given mass/actual mass of molecule/atom
1 mole of water is 18 grams.
Then,
150 grams of water,
→ 1/18 × 150
→ 25/3
→ 8.33333 . . .
Hence, 150 grams of water is 8.3 moles.
Is baking soda pure or impure
Answer:
Is baking soda pure or impure
answer: pure
Sketch 10 atoms of aluminum and 6 molecules of oxygen gas in the container on the left. In the right container, sketch the contents after the reaction is complete.
Answer:
Sketch 10 atoms of aluminum and 6 molecules of oxygen gas in the container on the left. In the right container, sketch the contents after the reaction is complete.
Explanation:
The balanced chemical equation of the reaction is:
[tex]4Al + 3 O_2 -> 2Al_2O_3[/tex]
Though there are 10 atoms of Al, only four atoms will react with every three molecules of oxygen.
Hence, right side the product formed is --- Al2O3.
URGENT!!!
A 0.420 M Ca(OH)2 solution was prepared by dissolving 64.0 grams of Ca(OH)2 in enough water. What is the total volume of the solution formed? (4 points)
1.07 liters
1.23 liters
2.05 liters
2.18 liters
Answer:
2.05 L is the correct answer.
Explanation:
w = 64 g
c = 0.420 M
m = 40 + (16+1)×2 = 74
[tex]c = \frac{w}{m \times v} \\ \implies \: v = \frac{w}{c \times m} \\ = \frac{64}{0.420 \times 74} \\ = 2.05 \: \: liters[/tex]
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The volume of the solution is given below which can be calculated using the molarity formula.
d. 2.18 litres
Molarity:It is defined as the ratio of number of moles of solute to the volume of the solution.
It is given by:
M= n/V
What information do we have?
M= 0.420M
mass = 64.0 grams
Molar Mass= 74g/mol
To find:
Volume of solution=?
Calculation for number of moles:
n= m/ M
n= 64/70
n= 0.91 moles
Molarity= n/V
0.420 M= 0.91 moles /V
V= 0.91/ 0.420
V= 2.1768 litres
Thus, the volume of the solution is 2.18 litres.
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The expression for the equilibrium constant for the reaction:
Ba3N2 (aq) + 6 H2O(1)-
3 Ba(OH)2 (aq) + 2 NH3 (9)
Answer:
[tex]Kc\frac{(Ba3N2)(H2O)^6}{(Ba(OH)2)^3(NH3)^2}[/tex]
Explanation:
Because kc equals products/reactants hope this helps :)
Calculate the volume of an
object with the following
dimension:
4.0 cm x 1.2 cm x 2.5 cm
[?] cm3
Answer: The volume of given object is 12.0 [tex]cm^{3}[/tex].
Explanation:
Given: Length = 4.0 cm
Width = 1.2 cm
Height = 2.5 cm
Formula to calculate the volume of such an object is as follows.
[tex]Volume = length \times width \times height[/tex]
Substitute the values into above formula as follows.
[tex]Volume = length \times width \times height\\= 4.0 cm \times 1.2 cm \times 2.5 cm\\= 12.0 cm^{3}[/tex]
Thus, we can conclude that the volume of given object is 12.0 [tex]cm^{3}[/tex].
Combination reactions always:
use only one reactant
require oxygen gas
involve an element and an ionic compound
form only one product
Answer:
require oxygen
Explanation:
The
volume
occupied by 5.0g in neon
03368 atm and
a temperatureof
35°C will be?
Answer:
uryehrufurudududjehshsyshzyyxzhsu
Which statement accurately describes a P wave?
Answer:
A P wave can move through solid rock only. P wave can travel through liquid accurately describes a P wave.
Discuss the phenomena of sunrise and sunset seen on Earth and describe how they will be different from the perspective of outer space.
Answer:
its very dark and scary
Explanation:
What unit is used for atomic mass
Copper(II) sulfate is an active ingredient in tree stump remover. In order to help remove
a tree that was causing foundational damage to a school, a chemistry student soaked
the roots with copper(ll) sulfate. The removed tree was later dried and used as
firewood. Assuming the copper(II) sulfate is present in the wood, what color would be
observed in the fire?
Answer:
the tree red
Explanation:
Copper (II) substances burn to produce bluish-green flames.
Flame test for copper (II)The copper (II) present in the wood will make the flame produce a bluish-green color.
This is because copper (II) compounds are known to produce flame colors that range from blue to bluish-green when tested in the laboratory.
This is because the electrons in the atoms of copper lose energy and drop to lower energy, releasing the lost energy as light in the process.
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At 500K, the equilibrium constant for the reaction N2O4D2NO2 is 1.5 x 10^3. What is the equilibrium constant for the reaction: 6 NO2 D 3N2O4?
Answer:
K = 2.96x10⁻¹⁰
Explanation:
Based on the initial reaction:
N2O4 ⇄ 2NO2; K = 1.5x10³
Using Hess's law, we can multiply this reaction changing K:
3 times this reaction:
3N2O4 ⇄ 6NO2; K = (1.5x10³)³ =3.375x10⁹
The inverse reaction has a K of:
6NO2 ⇄ 3N2O4 K = 1/3.375x10⁹;
K = 2.96x10⁻¹⁰A 16.4L sample of NO2(S) has a density of 1.89 g/L. What is the mass of the sample NO2(s)?
A) 31.0 grams
B) 14.5 grams
C) 8.68 grams
D) 0.115 grams
Answer:
A. 31.0
Explanation:
Remember the formula [tex]Density = \frac{mass}{Volume}[/tex], or [tex]D=\frac{m}{V}[/tex].
The problem tells us that the density is 1.89 g/L, and that the volume is 16.4 L.(Remember that if the units are in some form of liters, it is volume, similar to how if the units are in grams, it is mass.)
Plug in the numbers for density and volume, and you will get:
[tex]1.89=\frac{m}{16.4}[/tex]
Then, multiply both sides by 16.4 to get:
m = 30.996 g ≈ 31.0 g
Hope this helps!
A 6.00 g sample of an optically pure compound was dissolved in 40.0 mL of CCl4. The observed rotation was +3.30 °, measured in a 10.0 cm (1.00 dm) polarimeter tube.
The question is incomplete, the complete question is:
If a 6.00 g sample of an optically pure compound was dissolved in 40.0 mL of [tex]CCl_4[/tex] and the observed rotation was +3.30°, measured in a 10.0 cm (1.00 dm) polarimeter tube, how would one determine the specific rotation of the pure compound?
Answer: The specific rotation of the pure compound is [tex]+22^o[/tex]
Explanation:
To calculate the specific rotation of a pure compound, we use the equation:
[tex][\alpha]=\frac{\alpha_{\text{observed}}}{C\times l\text{( in dm)}}[/tex]
where,
[tex][\alpha][/tex] = specific rotation of a pure compound
[tex]\alpha_{\text{observed}}[/tex] = observed rotation of the compound = [ex]+3.30^o[/tex]
C = concentration in g/mL = 6.00 g/40 mL = 0.15 g/mL
l = path length = 1.00 dm
Putting values in above equation, we get:
[tex][\alpha]=\frac{+3.30^o}{0.15\times 1.0}[/tex]
[tex][\alpha]=+22^o[/tex]
Hence, the specific rotation of the pure compound is [tex]+22^o[/tex]
What is the two major types of chemical bonding?
Answer:
Ionic bond and covalent bond
Explanation:
The two main types of chemical bonding are ionic bond and covalent bond.
In an ionic bond, there is a transfer of electrons from one atom to another. Usually from a metal to a nonmetal leading to the existence of an ion pair. Ionic compounds are soluble in water and have high melting and boiling points due to the strong electrostatic interaction between ions in the compound.
A covalent bond involves sharing of electrons between atoms. In an ordinary covalent bond, the shared electrons are furnished by the two bonding atoms while in a dative covalent bond, the two bonding electrons are furnished by only one of the bonding species.
