Answer:
its D. potassium and chromium
Answer:
option d
Explanation:
potassium and chromium
Draw the stracture of 2-bromo-4-chloro-3, 3-dimethylhex-1-ene
answer :
this is the structure if you want it
When using IR spectroscopy, what is being recorded by the machine?
Sizes
O Wavelengths
O Color
O Molecular mass
Answer:
wavelengths
Explanation:
hope it helps
thanks
Wavelengths are being recorded by the machine by using IR spectrography. Therefore, option B is correct.
Infrared (IR) spectroscopy is also known as infrared spectrometry. It is a technique that is used to analyze and identify chemical compounds based on their absorption or emission of infrared radiation.
Infrared radiation lies in the electromagnetic spectrum between visible light and microwave radiation. It has longer wavelengths and lower frequencies than visible light. When infrared radiation passes through a sample, certain chemical bonds in the sample absorb specific frequencies of infrared light.
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The amount of ascorbic acid, C6H8O6. in orange juice was determined by oxidizing the ascorbic acid to dehydroascorbic acid, C6H6O6. with a known excess of l2, and back titrating the excess I2 with Na2S203. A 5.00-mL sample of filtered orange juice was treated with 50.00 mL of excess 0.01023 M l2. After the oxidation was complete, 13.82 mL of 0.07203 M Na2S203 was needed to reach the starch indicator endpoint. Report the concentration of ascorbic acid in milligrams per 100
mL
There is 2.43 mg of ascorbic acid in the 5.00-mL sample, or 48.6 mg/100 mL of orange juice.
Explanation:
For i2+na2s2o3 titration,
I2 + 2 S2O3^-2 <--> 2 I^-1 + S4O6^-2
13.82 mL of 0.07203 M Na2S2O3 was needed to reach the starch indicator end point.
Number of moles of Na2S2O3 = 13.82*0.07203= 0.9954546 millimoles.
So, number of moles of excess I2 = 0.9954546/2 = 0.4977273 millimoles.
For oxidizing the ascorbic acid to dehydroascorbic acid
C6H8O6 + I2 --> C6H6O6 + 2 H+ + 2 I-
SO 1mole of I2 read for 1 mole of C6H8O6.
Initial I2 used = 50*0.01023 = 0.5115 millimoles.
Number of moles of I2 used = 0.5115 - 0.4977273 = 0.0137727 millimoles.
Number of moles of C6H8O6 in5 ml of orange juice = 0.0137727 millimoles.
Weight of C6H8O6 in5 ml of orange juice = number of moles * molecular weight = 0.0137727 * 176 = 2.4239952 mg
In 100 ml of orange juice = 2.4239952/5) *100 = 48.479904 milligrams per 100 mL. is the answer.
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what is the percent yield if the combustion of gasoline results in 680 grams of steam produced when a theoretical yield is 985 grams of steam?
Answer:
69%
Explanation:
Percent yield = ?
Theoretical yield = 985 grams
Experimental Yield = 680 grams
Percent Yield = Experimental Yield / Theoretical Yield * 100
Percent Yield = 680 / 985 * 1 00
Percent Yield = 0.690 * 100 = 69%
what is a balanced nuclear equation for power generation?
A balanced nuclear equation for power generation by nuclear fission is given below:
²³⁵₉₂U + ¹₀n ---> ⁹²₃₆Kr + ¹⁴¹₅₆Ba + EnergyWhat is nuclear fission?The process of nuclear fission involves the splitting of an atom's nucleus into two or more smaller nuclei. Even by the energetic standards of radioactive decay, the fission process releases a very high quantity of energy and frequently results in gamma photons.
Nuclear fission is applied in nuclear power generation in a nuclear reactor.
The fissionable nuclear material is separated in the nuclear reactor so that a critical mass cannot exist, and the neutron flux and absorption are controlled to stop the fission reactions. The energy released during fission processes in a nuclear reactor used to generate electricity is trapped as thermal energy and used to heat water and create steam. The steam is utilized to turn a turbine, which powers an electricity-generating generator.
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State two reasons why a person might choose a pneumatic
system rather than a hydraulic system.
Answer:
pneumatics are cleaner the system uses no return lines and gases are exhausted to the atmosphere.efficient and reliableWhy does the drink in the regular cup warm
up?
The drink in the regular cup warms up because
Answer:
Energy transfer between the particles in solids, liquids, and gases can explain how warm matter outside a cup can cause a cold liquid inside the cup to warm up.
Explanation:
Answer:
The drink in the regular cup warms up.
Explanation:
The reason why it warms up is because the cup is colder than room temperature and melts another reason why the drink in the regular cup warms up is because when we breathe out hot air is coming out soo that also makes the drink warmer.
What type of change in matter absorbs energy or requires energy?
A.)freezing
B.) condensation
C.)exothermic reaction
D.)endothermic reaction
D.) endothermic reaction
2. HBIO3 name this acid.
Answer:
Hydroxy(oxo)bismuthine oxide
In the molecule C2H4 the valence orbitals of the carbon atoms are assumed to be?
a) dsp hybridized
b) not hybridized
c) sp hybridized
d) sp^3 hybridized
e) sp^2 hybridized
In the molecule C2H4, valence orbitals of the carbon atoms are assumed to be e) sp^2 hybridized.
What is valence orbitals?The set of orbitals that can energetically accept electrons to create chemical bonds is known as the valence shell. The ns and np orbitals in the outermost electron shell make form the valence shell for main-group elements.
The outside electrons engaged in bonding are called valence electrons. A particular atom can have 0 to 7 valance electrons since valance electrons can only exist in the s and p orbitals. Noble gases are atoms that have no valence electrons and dislike forming bonds.
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4 P (s) + 5 O2 (g) -> P4O10 (s)
If 0.554 mol of phosphorus burns, what mass of oxygen is used?
MassMass of oxygen used on combustion of 0.554 mol of phosphorus is 957.12 g.
What is combustion?Combustion is the name given to the chemical reaction in which a material combines with oxygen to produce heat. A substance is said to be combustible if it can burn. Another name for it is fuel. Fuel can be either solid, liquid, or gaseous.
Since, 4 moles of phosphorus burns in the presence of 5 moles of oxygen
Therefore, 0.554 moles of phosphorus will burn in presence of 54×0.554=29.91 moles of oxygen.
Molar mass of oxygen is 32 g/mol.
Hence, mass of oxygen used can be calculated by:
Mass of oxygen used under given reaction conditions =32×29.91⇒957.12 g.
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Mass of oxygen used on combustion of 0.554 mol of phosphorus is 957.12 g. Oxygen has an atomic mass of 15.9994. ss.
What is combustion?Combustion is the name given to the chemical reaction in which a material combines with oxygen to produce heat. Another name for it is fuel. Fuel can be either solid, liquid, or gaseous.
What is combustion of phosphorus?4 moles of phosphorus burns in the presence of 5 moles of oxygen 0.554 moles of phosphorus will burn in presence of 54×0.554=29.91 moles of oxygen. Molar mass of oxygen is 32 g/mol. Mass of oxygen used under given reaction conditions 32×29.9 = 957.12 g.
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Urgent will give brainlist
Answer:
i think that it is C. both
Explanation:
Cars are responsible for ____% of CO2 emissions. a10% b25% c100% d0%
Answer:
Explanation:
25%
A chemist is studying the composition of a sample of ocean water. He gently heats the sample to evaporate the water, leaving him with the solid substances that had been dissolved in the sample. Next, he performs a series of procedures to separate the solid substances from each other. Finally, he measures how much of each solid he has obtained. What substance would he probably have the most of
The substance that he will have the most will be sodium chloride.
More than 70% of the surface of the Earth is covered by seawater, the liquid that makes up the oceans and seas. 96.5 percent of seawater is made up of pure water, 2.5 percent salt, and minor amounts of dissolved inorganic and organic compounds, particles, and a few atmospheric gases.
When a chemist analyzes the composition of a sample and heats it to cause the water to evaporate, he is left with the solid substances that had been dissolved in the sample. Sodium chloride is the most significant salt that is created by ocean water. He next goes through a series of steps to separate the solid materials from one another. The highest substance found in ocean water, according to his measurements, is salt, specifically sodium chloride.
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Name the following compound
(ii) CH3COOCH2CH2CH3
Answer:
PROPYL ETHANOATE (OR PROPYL ACETATE)
Explanation:
1st step: Identify the functional group of the compound.
COO is present, hence it is an ester.
2nd step: Split up the compound into CH3COOH and CH3CH2CH2OH.
Comes from ethanoic acid and propanol
3rd step: Join the names of the alcohol and the carboxylic acid together.
Hence, propyl ethanoate.
How would you name this organic compound?
I found a couple ways to name it but I don't know which one's correct.
What is Fracking (Own Words)
The process of forcing liquid at high pressure into rocks, deep holes in the ground, etc. in order to force open existing cracks and take out oil or gas.
Hope This Helps You ❤️ANSWER :-
❥Fracking..!!!
Fracking is the process of drilling down into the earth before a high-pressure water mixture is directed at the rock to release the gas inside.
Hope it helps ya!❤
Which of the following answers correctly describes protons?
O A) Protons have a positive charge and are located outside of the atom's nucleus.
O B) Protons have a negative charge and are located inside the atom's nucleus.
OC) Protons have a positive charge and are located inside the atom's nucleus.
OD) Protons have a neutral charge and are located outside of the atom's nucleus
Which of the following properties can be used to describe both the particle model of light and the wave model of light
An absolutely interesting occurrence is light. Despite the fact that it is well recognized that light is an electromagnetic, it is frequently more practical to characterise or characterize light in other ways than only as a wave.
For instance, light is frequently depicted as anything other than a wave in spectroscopy and fundamental physics.
Similar to how we replicate oceans moving through water, the Wave Model illustrates how light propagates. Colors can be explained using the Wave Model by including information about wavelength.
The Light Wave Model. Similar to how we simulate ocean waves moving across water, the Wave Model illustrates how light propagates. We can explain qualities of light by imagining it to be an oscillating wave.
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How many ATP's is produced in the glycolysis of 2 glucose molecules?
Answer: 4 ATP molecules is produced in the glycolysis of 2 glucose molecules
How is ATP produced?The first stage of most carbohydrate catabolism, which is described as the breakdown of larger molecules into smaller ones, is glycolysis, which is a part of cellular respiration. Two Greek words that mean "to break down anything sweet" are the source of the word glycolysis. Two molecules of ATP are created during the breakdown of glucose and formation of pyruvate during glycolysis.
Explanation:
2 ATP are produced.
For every glucose molecule, meaning that for every 2 glucose molecules, 4 ATP will be created.
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How many atoms are in NaN(OH)3
Answer:
Na----1
N-----1
O-----3
H-----3
3+3+1+1 =8
There are 8 atoms in that compound.
How many joules of heat are required to raise the temperature of 174g of gold from 22°C to 85°C? The specific heat of gold is 0.129 J/g°C.
How many atoms each element are in the formula shown?
Answer:
In 2C2H6, The C= 4 and H= 12
List all the possible types of bonding for oxygen
Two covalent bonds are formed by oxygen to complete their octet.
What are covalent bonds?An electron exchange that results in the formation of electron pairs between atoms is known as a covalent bond. Bonding pairs or sharing pairs are the names given to these electron pairs. Covalent bonding is the stable equilibrium of the attractive and repulsive forces between atoms when they share electrons.
What is an octet?In chemistry, an octet is an arrangement of eight electrons in the outer electron shell of a noble gas atom. The relative inertness of noble gases and the chemical behaviour of several other elements are attributed to this structure.
What is oxygen?The chemical element oxygen has an atomic number of 8. (it has eight protons in its nucleus). At normal temperatures and pressures, oxygen transforms into the chemical compound (O2) of two atoms, which is a colourless gas.
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In an experiment, 24g of magnesium react with 73g of hydrogen chloride to produce a gas and 95g of magnesium chloride.
Write a balanced chemical equation for this reaction
What type of chemical equation for this reaction?
Do these results support the Law of Conservation of Mass Explain your answer.
Answer:
Mg + 2HCl=== Mg(Cl)2 + H2
The Reaction is a single displacement reaction.
Yes!
This reaction obeys the law of conservation which states that for a closed system... Matter and energy transfer is constant.
Meaning that the Mass of products must equal mass of Reactants
To prove this
lets Calculate the Mass of reactants
24g + 73g=97g.
Mass of Products...
95g + x.
let's calculate the mass of Hydrogen produced.
Note: You can get it using any of the reactants... I'll use Magnesium
Now from the balanced reaction.... 1mole of Mg reacts to produce 1mole of Hydrogen
Moles of Mg=Mass/Molar Mass
Given Mass=24g
Molar mass of Mg=24
Mole of Mg =24/24
=1mole
Since Mole ratio of Mg and H2 is 1:1.... Therefore 1Mole of Hydrogen is produced too.
To get Mass of H2
Again
Mole=Mass/Mm
Known= 1mole of H2 isproduced
Mass of H2 =2g
Mole=Mass/Mm
Mass =Mole x Mm
= 1 x 2
=2g
Now
Total Mass of products is
95 +2 = 97g.
This is the same with the Mass of Reactants
So The Law of Conservation of Mass Holds.
How does reactivity vary when moving from left to right in third period of modern periodic table?
In the modern periodic table, reactivity increases when moving from left to right in the third period because metallic character decreases along a period.
The elements in the modern periodic table are arranged in 7 periods and 18 groups in a certain manner such that along a period , the metallic character of the element decreases and non-metallic character increases while on moving from top to bottom in a group, the metallic character increases and non-metallic character decreases.
The metallic character of elements depends upon its ability to lose electrons. Along a group, the size of atom increases and gradually the nuclear pull decreases so they can readily lose electrons but across a period, atomic size decreases and nuclear pull increases so they cannot lose electrons easily.
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What is the structure of a compound of molecular formula C10H14O2 that shows a strong IR absorption at 3150 ¾2850 cm-1 and gives the following 1H NMR absorptions: 1. 4 (triplet, 6H); 4. 0 (quartet, 4H); and 6. 8 (singlet, 4H) ppm?
First, we must compute the index of hydrogen deficiency, IHD, using the molecular formula of the compound [tex]C_{10}H_{14}O_{2}[/tex].
What is a spectrum data?
Spectrum data is data collected from spectroscopic experiments, which measure the interaction of matter with electromagnetic radiation. This data can be used to identify the chemical composition of a sample, as different elements and molecules absorb and emit radiation at different wavelengths.
Then, number of C atoms - [tex]\frac{number of atoms}{2} + 1[/tex]
= [tex]10 + \frac{14}{2} + 1[/tex]
= [tex]10 - 7 + 1[/tex]
= [tex]4[/tex]
Based on the molecular structure, this tells us how many multiple bonds and rings the compound has.
This compound contains four unsaturated bonds. We can tell from the spectrum data that it is aromatic (chemical shifts above 6 comes from aromatic protons). Based on this, we can conclude that the structure of this compound contains a benzene ring. Four IHD are found in the benzene ring, one from the ring and three from double bonds.
Following that, IR spectrum data revealed that absorption on [tex]3150-2850 cm^{-1}[/tex] indicated hybridised CH bonds.
The following chemical shifts are observed in the NMR spectrum data:
On 1,4ppm, it becomes a 6H triplet. It has two protons in its neighbourhood because it is a triplet, and it comes from [tex]CH_{3}(1)[/tex]. This group must be linked to the [tex]CH_{2}(2)[/tex].
A quartet on 4,0ppm, belongs to 4H from [tex]CH_{2}(2)[/tex]. It has 3 protons in neighborhood stop it it attached to the [tex]CH_{3}(1)[/tex] and singlet on 6,8ppm comes of aromatic protons, 4H (3).
Based on the [tex]^{1} HNMR[/tex] spectrum data, we can only attach the two O atoms to the benzene ring and the [tex]CH_{2}(2)[/tex] group.
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The gas in a 250.0 mL piston experiences a change in pressure from 1.00 atm to 4.90 atm. What is the new volume (in mL) assuming the moles of gas and temperature are held constant
The gas in a 250.0 mL piston experiences a change in pressure from 1.00 atm to 4.90 atm. 56.2 ml is the new volume (in mL) assuming the moles of gas and temperature are held constant.
What is Boyle's law ?Boyle's law states that at a given temperature, the volume of a gas and its pressure are inversely proportional.
Robert A. Boyle discovered the law in 1662, which states that at a constant temperature, the volume of a gas is inversely proportional to the pressure exerted by the gas.
Given:
Initial volume (V₁) = 250 mL
Initial pressure (P₁) = 1.00 atm
Final volume (V₂) = ?
Final pressure (P₂) = 4.45 atm
Assuming the gas has an ideal behavior, we can find the final volume by using Boyle's law as follows:
P₁ × V₁ = P₂ × V₂
V₂ = P₁ × V₁/P₂
V₂ = 1.00 atm × 250 mL / 4.45 atm
V₂ = 56.2 ml
Thus, 56.2 ml is the new volume (in mL) assuming the moles of gas and temperature are held constant.
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Calculate the volume of oxygen produced at STP from 172 grams of potassium chlorate, KClO3, in the following reaction:
KClO3 → KCl + O2 Show your work.
Answer:
64.2 L
Explanation:
In order to be able to calculate the volume of oxygen gas produced by this reaction, you need to know the conditions for pressure and temperature.
Since no mention of those conditions was made, I'll assume that the reaction takes place at STP, Standard Temperature and Pressure.
STP conditions are defined as a pressure of
100 kPa
and a temperature of
0
∘
C
. Under these conditions for pressure and temperature, one mole of any ideal gas occupies
22.7 L
- this is known as the molar volume of a gas at STP.
So, in order to find the volume of oxygen gas at STP, you need to know how many moles of oxygen are produced by this reaction.
1- Give the chemical formula for trans-dichlorobis(ethylenediamine)platinum(IV). Use (en) as the symbol for ethylenediamine.
2- Give the systematic name of this coordination compound.
Na[Al(OH)4]
1.trans-[Pt(en)2Cl2]2+
2.coordination compound Na [Al (OH)] systematic name: sodium tetrahydroxidoaluminate (III)
For several industrial and technical applications, sodium aluminate serves as an efficient supply of aluminum hydroxide. A white crystalline solid with the chemical formula NaAlO2, NaAl(OH)4 (hydrated), [2] Na2OAl2O3, or Na2Al2O4, pure sodium aluminate (anhydrous) is a white substance. Both a solution and a solid form of sodium aluminate are sold commercially.Other comparable compounds, often referred to as sodium aluminate, include Na5AlO4 and Na7Al3O8, which contain complex polymeric anions and Na17Al5O16 and NaAl11O17, which was originally wrongly thought to be -alumina, a phase of aluminum oxide.Aluminum chloride, sodium chloride, and water are produced when hydrogen chloride and sodium tetrahydroxoaluminate interact. Diluted hydrogen chloride in a solution form.
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