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Answer:
5) C
6) D
7) D
8) C
Explanation:
Related Questions
Please help me out in this question am giving the brainliest
Answers
moles of NaOH = mass/Mr = 120g/(23+16+1) = 3moles
concentration of NaOH = 3moles/2L =1.5M
Which direction does heat flow from
Answers
Answer:
A
Explanation:
hot to cold; jus took the quiz;)
Selenium, an element required nutritionally in trace quantities, forms compounds analogous to sulfur. Name the following ions.
a. SeO_4^2-
b. Se^2-
c. HSe^-
d. HSeO_3^-.
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b. selenide . (sulfide counterart)
c. hydroselenide . (hydrosulfide counterpart)
d. hydrogen selenite
The names of ion are:
[tex]Selenate = SeO_4^{2-}\\Selenide = Se^{-2}\\Hydroselenide = HSe^-\\Hydrogenselenite = HSeO_3^-\\[/tex]
Explanation:
Sulfur forms various compounds such as sulfates, sulfites, sulfides, hydrosulfides, hydrogensulfites.The symbols of these ions are:[tex]Sulfate = SO_4^{2-}\\Sulfite = SO_3^{2-}\\Sulfide = S^{-2}\\Hydrosulfide = HS^-\\Hydrogensulfite = HSO_3^-\\[/tex]
According to the question, selenium also forms compounds analogous to sulfur so the name of the given ions of selenium will be in analogy to that of the sulfur compound.
[tex]Selenate = SeO_4^{2-}\\Selenide = Se^{-2}\\Hydroselenide = HSe^-\\Hydrogenselenite = HSeO_3^-\\[/tex]
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Equal masses of five unknown non-electrolytes are dissolved in water and the boiling point elevations are measured. Rank the following non-electrolytes from highest to lowest molar mass.
A. Boiling point of D (aq) = 103.2 degree C
B. Boiling point of A (aq) = 102.4 degree C
C. Boiling point of E (aq) = 101.3 degree C
D. Boiling point of B (aq) = 101.9 degree C
E. Boiling point of C (aq) = 100.5 degree C
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10 advantages of atomic absorption spectrometer over flame photometer
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Answer:
(1) It does not suffer from spectral interference, which occurs in flame emission spectroscopy.
(2) By atomic absorption technique, traces of one element can easily be determined in presence of high concentration of other elements.
The technique makes use of the atomic absorption spectrum of a sample in order to assess the concentration of specific analytes within it. It requires standards with known analyte content to establish the relation between the measured absorbance and the analyte concentration and relies therefore on the Beer–Lambert law.
The density of Silver is 10.5 g/mL. How much mass would be present given a silver cube
with a volume of 25.0 mL?
PLEASE HELP ASAP
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Answer:
m=dxv
= 10.5 x 965 = 10132.5 rounded off to 10100 g
Explanation:
How would life be different without penicillin
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Answer:
Without new antibiotics, common infections and minor injuries could become life-threatening and major surgeries and chemotherapy impossible because the treatments we have been using for years are no longer effective.
CHAPTER 8 FORCE AND MOTION
Choose the S.I. unit for pressure.
1. Watt
2. Joule
3. Pascal
4.Newton
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The lines of latitude are measured
from a line at the center of the Earth
called the
Answers
Answer:
parallels
Explanation:
hope it may help you
Acrylonitrile and ethyl acetate have the same boiling point: 77.2ºC. In one to two sentences, explain what outcome you would expect if a mixture of these two substances were distilled (SHORT ANSWER)
Answers
Acrylonitrile and ethyl acetate will be collected together since they both have the same boiling point.
The method of distillation highly depends on the difference between the boiling points of the Acrylonitrile and ethyl acetate.
Since they have the same boiling point, the two substances turn into vapor at the same temperature and are collected simultaneously.
Hence separation is not achieved by distillation.
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Answer:
They would boil at the same rate. Basically meaning, that they would both be finished distilling at the same time.
Explanation:
This is what I put (this is for you to revise and it has not been graded yet DO NOT CHEAT with this answer just take in the info and revise it)
How can the Swartz process be modified to work for bacteria? Explain.
Answers
Answer:
https://swartzbiotechnologylab.sites.stanford.edu/research
Explanation:
Alkyl chlorides and alkyl bromides are typically transformed into alkyl fluorides in the organic reaction known as the Swarts Reaction.
Swartz reaction?Frederick Jean Edmond Swarts first reported this procedure in 1892. Heating the alkyl chloride or alkyl bromide in the presence of heavy metal fluorides like AGF, Hg2F2, CoF2, or SbF3 causes this reaction.
Swartz process can be used to modify work for bacteria. Bacterial biofilms are collections of microorganisms where the cells are immersed in an extracellular polymeric matrix that the bacteria have self-produced.
In contrast to planktonic bacteria, which are in a state of free movement in a bulk solution, this situation is very different.
Applications:
In this process, alkyl fluorides are created.Fluorinated aliphatic organic molecules, or Freons, are produced via a different variation of the same process.Anhydrous hydrogen fluoride is fluorinated to produce Freons in the presence of antimony salts, which exhibit the oxidation states +3 and +5.Therefore, Alkyl chlorides and alkyl bromides are typically transformed into alkyl fluorides in the organic reaction known as the Swarts Reaction.
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What is the volume of 12.0 g of a liquid with a density of 1.37 g/mL?
Answers
Answer:
8.76 ml³
Explanation:
volume = mass ÷ density
Which of the following is a result of increasing the temperature of a system that includes a reaction in the forward direction that is exothermic?
a) The equilibrium constant decreases.
b) The concentrations of the products increase.
c) The equilibrium constant increases.
d) The concentrations of the reactants decrease.
Answers
Answer:
I believe the answer your looking for is out of A or B
Explanation:
Option B because if the heat increases its essentially causing the concentration to increase by replacing the weak bonds with stronger ones
In increasing the temperature of a system that includes a reaction in the forward direction that is exothermic, the concentration rises as weak bonds are replaced by stronger ones.
What is the temperature of a system?The average kinetic energy of the atoms or molecules in a system is measured by temperature. No heat is transmitted between two objects in thermal equilibrium, according to the zeroth law of thermodynamics.
In conclusion, as the temperature of the system rises, the concentration rises as weak bonds are replaced by stronger ones.
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Please help!!! Question 1 to 8
Answers
Answer:
1) C - 30
2) A - MgO
3) C - 3Cu + N2 + 3H2O
4) C - 100
Explanation:
is time a fundamental quantities or units?
Answers
Answer: Its fundamental quantities
The SI is on the seven SI base units for seven base quantities.
pls mark brainliest
How many square centimeters are in an area of 5.90 inch^2 ?
Answers
Answer:
38.0644 cm^2
Explanation:
5.90 ×6.451 cm^2The allele for dimples is dominant and the allele for no dimples is recessive. If two parents that are heterozygous for dimples produce a child, what are the chances the child will have dimples? A. 25% B. 50% C. 75% D. 100%
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The chances the child will have dimples is 50%. Hence The correct option is (B).
What is Heredity ?Heredity, also called inheritance or biological inheritance, is the passing on of traits from parents to their offspring; either through asexual reproduction or sexual reproduction, the offspring cells or organisms acquire the genetic information of their parents.
There is a 50% chance that the child does not obtain the allele needed for dimples (dd), and a 50% chance that the child is heterozygous (Dd). Because dimples is an autosomal dominant trait, heterozygosity will express dimples, leading to a 50% chance that the child will have dimples.
Therefore, The chances the child will have dimples is 50%. Hence The correct option is (B).
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what will I benefit or what will I gain if I know the absorbance and emission of any substance?
Answers
if 10 moles of A and 7.5 moles of B are taken in a flask, identify the value of moles of A4B3 produced in a reaction.
Answers
The number of moles of A4B3 produced in a reaction is obtained by stoichiometry.
The term stoichiometry refers to mass-mole relationship. The first step in solving this problem is by writing the correct reaction equation as follows;
4A + 3B -------> A4B3
If 4 moles of A yields 1 mole of A4B3
10 moles of A yields 10 * 1/4 = 2.5 moles of A4B3
Therefore, 2.5 moles of A4B3 is produced.
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Who developed the gas law that relates pressure and temperature?
Answers
Explanation:
physicist Robert Boyle
Answer: Boyle
Explanation: Educere Answer
lidocain có tính bazơ không
Answers
Answer:
Lidocain là cơ bản.
Tôi hy vọng câu trả lời của tôi là hữu ích cho bạn.
The ideal gas constant R can be denoted as _______.
A. R = 9.315 (Pa × m3) / (mole × K)
B. R = 9.315 J / (mole × K)
C. R = 0.0821 (L × atm) / (mole × K)
D. All of the Above E. None of the Above
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in the unit of J/(mole x K) and (Pa x m3)/ (mole x K) the value should be 8.314
halogens can react with metals by accepting a/an____ from a metal atom and forming an ionic compound
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PLEASE SOLVE THIS QUESTION.
VERY MUCH IMPORTANT
Answers
Answer:
[tex]thank \: you[/tex]
what is the density of a 5 mL sample of 1.95g of Gold
Answers
Answer:
density=mass/volume
=1.95/5 = 0.39 g(mL)-¹
how to find the average speed of something
Answers
Answer:
if you want to find average speed so u need to use this formula
Average speed = [tex]\frac{Total Displacement}{Total Time}[/tex]
Question 18(Multiple Choice Worth 5 points)
(03.02 MC)
Which of the following elements has properties different than the rest?
H
K
N
O
Answers
Answer:
H
hydrogen have different properties
How does the volume occupied by a cubic centimeter (cm3) compare with the volume occupied by a milliliter
Answers
Answer:
One cubic centimeter is equal to one milliliter. Cubic centimeter is used interchangeably with millimeter. Centimeter belongs in the CGS unit system (centimeter-gram-second system) while liter belongs in the SI (Système International d'Unités) unit system. These two are equal.
Explanation:
In a fission reaction a 235U nucleus captures a neutron. This results in the products 141Ba and 92Kr along with how many neutrons?
A. 1.
B. 2.
C. 3.
D. 5.
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Which species is the conjugate acid of the hemiacetal formed by reaction of benzaldehyde with methanol containing a trace of acid?
Answers
Answer:
Sulphuric acid is the on
Explanation:
think so