Answers
Explanation:
use the conversation in the image
Related Questions
How many atoms are in 20.4 g of beryllium
Answers
Iodine shines like metals but is not metal what is its basis
Answers
Answer:
Iodine is a non-metal, but it is lustrous (lustrous is the property of metal) in nature.
Calculate how many grams of sodium acetate you expected to make from your starting amount of sodium bicarbonate (0.5g). This is your theoretical yield.
Equation: NaHCO3 + HC2H3O2 = NaC2H3O2 + H2O + CO2
Answers
What transition energy corresponds to an absorption line at 502 nm?
A. 4.56 x 10-19
B. 1.76 10-19
C. 2.53 x 10-19
D. 3.96 10-19 J
Answers
Answer:
D 3.96 10-19J
Explanation:
I took the test
45. What is the H ion concentration of an aqueous solution
in which the OH-ion concentration is 1 x 10-2 mole
per liter?
A) 1 X 10-14 M
C) 1 x 10-9M
B) 1 x 10-12 M
D) | 10-2M
Answers
Answer:
= 1 X 10⁻⁻¹²M
Explanation:
At 25°C & 1atm [H⁺][OH⁻] = 1 x 10⁻¹⁴ => [H⁺] = 1 X 10⁻¹⁴/[OH⁻] = 1 X 10⁻¹⁴/1 X 10⁻²
= 1 X 10⁻⁻¹²M
Do these two points (equivalence point and titration endpoint) in a titration occur when the same volume of titrant has been added? please Explain.
Answers
Answer:
Show a picture
Explanation:
There is a bottle of KCl solution: the volume is 35 mL; its molarity is 3.0 M.
After diluting it into final volume 200 mL, what is the molarity (in M) now?
Answers
Answer:
0.525 M
Explanation:
As the problem deals with a dilution process, we can use the following formula:
C₁V₁=C₂V₂Where subscript 1 stands for initial concentration and volume, while 2 stands for the final conditions. Meaning that in this case:
C₁ = 3.0 MV₁ = 35 mLC₂ = ?V₂ = 200 mLWe input the data given by the problem:
3.0 M * 35 mL = C₂ * 200 mLAnd solve for C₂:
C₂ = 0.525 MDescribe two realistic demands protestors could bring forward in their peaceful protest so that they dont face the same situation in future
Answers
Answer:
I do not know the Answer I'm just trying to get my point
Explanation:
Thank You
The two realistic demands protestors could bring forward in their peaceful protest include:
Adequate securityProvision of social amenities.Who is a Protester?Thus it is referred to an individual which publicly demonstrates opposition to something.One of the roles of the government is to protect lives and properties.
Making realistic demands during a peaceful protest is looked into in most cases.
Read more about Protester here https://brainly.com/question/11505871
How are cells organized?
A: Organs
B: Organelles
C: Tissues
Answers
Answer:
tissues,organs, organelles
Which of the following chemical reactions will produce a precipitate?
3 KBr + AlPO4 → K3PO4 + AlBr3
Na2CO3 + CaCl2 → CaCO3 + 2 NaCl
NH4OH + KCl → KOH + NH4Cl
ZnCl2 + Mg2SO4 → ZnSO4 + MgCl2
Answers
Answer:
Na2CO3 + CaCl2 → CaCO3 + 2 NaCl
Explanation:
A double displacement reaction is a type of metathesis reaction in which two reactants exchange ions to form two new compounds. Double displacement reactions usually involve reacting two soluble salts in aqueous solution resulting in the formation of two products: a soluble salt and an insoluble salt that is produced as a precipitate.
If the reaction of two soluble compounds does not produce a precipitate, the reaction does not result in the formation of a product as basically, all the ions are mixed together in the reaction vessel.
From the given reactions above:
1. 3 KBr + AlPO4 → K3PO4 + AlBr3
The reaction does not proceed to product formation as the two products are all soluble salts.
2. Na2CO3 + CaCl2 → CaCO3 + 2 NaCl
The reaction occurs as one of the products, CaCO3 is insoluble as is produced as a precipitate.
3. NH4OH + KCl → KOH + NH4Cl
The reaction does nott occuras the products are all soluble in water.
4. ZnCl2 + Mg2SO4 → ZnSO4 + MgCl2
The reaction does not occur as the products are all soluble in water.
how can a scientist make a solution using salt and water?
Answers
Answer:
by boiling water and add the salt
Explanation:
because salt dissolves better if mixed with hot water which makes the process faster and effective
Knives should be stored in cluttered drawers.
True or false
Answers
In the context of a balanced chemical equation, a____is a number to the lower right of an element or ion within formula and it applies to____. A____is a number to the left of a formula and it applies to_____. Only_____should be added or changed when balancing chemical equations.
Answers
Answer:
Explanation:
The preceding chapter introduced the use of element symbols to represent individual atoms. When atoms gain or lose electrons to yield ions, or combine with other atoms to form molecules, their symbols are modified or combined to generate chemical formulas that appropriately represent these species. Extending this symbolism to represent both the identities and the relative quantities of substances undergoing a chemical (or physical) change involves writing and balancing a chemical equation. Consider as an example the reaction between one methane molecule (CH4) and two diatomic oxygen molecules (O2) to produce one carbon dioxide molecule (CO2) and two water molecules (H2O). The chemical equation representing this process is provided in the upper half of Figure 1, with space-filling molecular models shown in the lower half of the figure.
What are 2 comparisons between organisms and music?
Help me fast I put 98 points pls help me no links I am serious.
3rd repost
Answers
Use Lewis theory to determine the chemical formula for the compound formed between Mg and Br. Group of answer choices Mg3Br2 Mg2Br3 Mg2Br MgBr2 MgBr
Answers
Answer:
MgBr2
Explanation:
(Mg^2+) + (Br^1-)
For every Mg we need 2 Br to balance out the compound.
Since magnesium has two outer electrons, it can donate one electron each to two bromine atoms having seven outer electrons in order for each of the atoms to have a complete octet.
Since the octet rule states that a stable atom must have eight electrons in its outermost shell, it follows that magnesium could give out two of its outermost electrons to two bromine atoms.
When that happens, each bromine atom which previously had seven electrons now have eight electrons, satisfying the octet rule. The correct formula of the compound is MgBr2.
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S- 2500m
112
VODO
4. Two waves are traveling in the same medium with a speed of 340 m/s. What is the difference in
frequency of the waves if the one has a wavelength of 5.0 m and the other has a wavelength of
0.2 m?
Answers
Answer:
1632 Hz
Explanation:
We'll begin by calculating the frequency of each wave. This can be obtained as follow:
1st wave:
Velocity (v) = 340 m/s.
Wavelength 1 (λ₁) = 5 m
Frequency 1 (f₁) =?
v = λ₁f₁
340 = 5 × f₁
Divide both side by 5
f₁ = 340 / 5
f₁ = 68 Hz
2nd wave:
Velocity (v) = 340 m/s.
Wavelength 2 (λ₂) = 0.2 m
Frequency 2 (f₂) =?
v = λ₂f₂
340 = 0.2 × f₂
Divide both side by 0.2
f₂ = 340 / 0.2
f₂ = 1700 Hz
Finally, we shall determine the difference in the frequency of both waves.
This can be obtained as follow:
Frequency 1 (f₁) = 68 Hz
Frequency 2 (f₂) = 1700 Hz
Difference =?
Difference = f₂ – f₁
Difference = 1700 – 68
Difference = 1632 Hz
The acid ionization equilibrium for the weak acid HF is represented by the equation above. To prepare a buffer with a pH=3.50, a student needs to mix 250.mL of 0.100MHF and 250.mL of 0.100MKF. If the student mistakenly mixes 250.mL of 0.0500MHF and 250.mL of 0.0500MKF, which of the following is the result of this error?
The buffer will have a lower capacity because of the smaller number of moles of HF and F− available to react if an acid or base is added.
The buffer will have a lower capacity because of the smaller number of moles of H F and F with a negative 1 charge available to react if an acid or base is added.
The buffer will have a lower capacity because the smaller amount of HF and F− will lower the pH of the buffer, and buffers of lower pH have a lower buffer capacity.
The buffer will have a lower capacity because the smaller amount of H F and F with a negative 1 charge will lower the p H of the buffer, and buffers of lower p H have a lower buffer capacity.
The buffer will have a higher capacity because a larger proportion of HF and F− will ionize at lower concentrations, resulting in the neutralization of any added acid or base.
The buffer will have a higher capacity because a larger proportion of H F and F with a negative 1 charge will ionize at lower concentrations, resulting in the neutralization of any added acid or base.
The buffer will have the same capacity because the large volume of the buffer solution dilutes any added acid or base
Answers
Answer:
4
Explanation:
From the options provided the result of the error is ( A ) ; The buffer will have a lower capacity because of the smaller number of moles of HF and F⁻ available to react if an acid or base is added.
Considering the acid ionization equilibrium for the weak acid HF.
A buffer solution is a solution that its PH value remains unchanged when a small amount of acid or base to added to the solution, therefore when the moles of acid or base present in the buffer solution is high enough the buffer solution will have a high buffer capacity. from the mistake of the student the number of moles present is lesser which means that the buffer solution will have a lower capacity
Hence the buffer will have a lower capacity because of the smaller number of moles of HF and F⁻ available to react is an acid or base is added.
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What is the name of the structure formed when fertilization occurs?
Answers
Answer:
zygote
Explanation:
I got this online
Answer:
ᘔYᘜOTᗴ:=> In human fertilization, a released ovum (a haploid secondary oocyte with replicate chromosome copies) and a haploid sperm cell (male gamete)—combine to form a single 2n diploid cell called the zygote.
ʰᵒᵖᵉ ⁱᵗ ʰᵉˡᵖˢ
[tex] \infty \infty [/tex]
Given a 0.5 M stock solution of aqueous NaCl, how much of the stock solution would you need to make a 50 mL sample of 0.25 M aqueous NaCl solution? How much water would you need to add to the NaCl solution?
Answers
Answer:
25 ml of stock
Explanation:
Molarity x Volume of Concentrated Stock = Molarity x Volume of Diluted Stock
=> Mc x Vc = Md x Vd => (0.5M)(x) = (0.25M)(50 ml)
=> x = Vc = (0.25M x 50 ml) / (0.50M) = 25 ml of stock
An amidation reaction is analogous to a(n) __________. View Available Hint(s) An amidation reaction is analogous to a(n) __________. esterification reaction in which an alcohol and a carboxylic acid react to form an ester acid hydrolysis reaction in which an amine is broken up into an amide and an alcohol base hydrolysis reaction in which an amine salt and an alcohol are formed esterification reaction in which an amine and an alcohol combine to make an amide
Answers
Answer:
esterification reaction in which an alcohol and a carboxylic acid react to form an ester
Explanation:
Esterification involves the reaction of an alcohol and a carboxylic acid to form an ester. This is an analogue of amidation which involves the reaction of a carboxylic acid with an amine to form an amide.
The relationship between the two reactions is that in both cases, the carbonyl (CO) group of the carboxylic acid is maintained and then bonded to a new moiety in the product. Water is formed in both reactions.
Hence, for esterification;
RCOOH + ROH ------> RCOOR + H2O
For amidation;
RCOOH + RNH2 -------> RCONHR + H2O
List 4 significant problems with nuclear power plants.xx
Answers
Answer:
Cost.
Weapons Proliferation Risk.
Meltdown Risk.
Mining Lung Cancer Risk.
Explanation:
Hope this helped!!!
3. When looking at a potential energy graph, how do you know if a reaction is
exothermic or endothermic?
Answers
Answer:
The correct answer is -
if the potential energy of reactants is less than the potential energy then it is an endothermic reaction and if the potential energy of reactants is more than the products it is an exothermic reaction.
Explanation:
The potential energy graph represents the energy change in a reaction as it progresses. In the initial part of the reaction, the energy shows are the energy of reactants that takes part in the reaction, and in the later phase, the energy has represented the energy of products of the reaction.
To find the reaction if it is endothermic or exothermic one can see if the potential energy is increased or decrease with the progress of the reaction. if the reaction is increasing in energy with the progress then it is endothermic and exothermic in less energy.
An aluminum atom has 13 protons. If an atom of aluminum has a neutral charge, how many electrons should be moving around outside the nucleus?
Answers
Answer:
13
Explanation:
The correct answer is:
13
For an aluminum atom to have a neutral charge, 13 electrons must cancel out the positive charge from the 13 protons.
What is the atomic number of the atom
Answers
I’m not sure if that’s what you were asking, I was a bit confused on the wording.
Consider the following scenario
A drought hits the habitat of a semi-aquatic bird population. All ponds dry up, and fish populations decline. There are two groups of birds in the population that differ in leg length and diet. Long-legged birds eat fish, while short-legged birds eat insects. The drought has little effect on insect populations
What is the main selective pressure in this scenario?
Oleg length
Odrought
Ofish population
Oinsect population
Answers
Answer: b
Explanation: jk
Explain in detail how low density polyethylene is made
Answers
Answer:
Low-density polyethylene is manufactured by the process of the polymerization of ethylene at very high temperatures in a tubular reactor. In this tubular reactor, high-pressure polymerization allows further copolymerization of ethylene with polar co-monomers. The tubular process has an advantage over autoclave process.
Explanation:
please mark brainliest
Using table 3, predict the molecular geometry of the following molecules:
a. The central atom bonded to four substituent atoms and having no lone pair.
b. The central atom bonded to three substituent atoms and having one lone pair.
c. The central atom bonded to two substituent atoms ảnd having
one lone pair.
d. The central atom bonded to two substituent atoms and having no lone pair.
Answers
Answer:
see explanations
Explanation:
a. The central atom bonded to four substituent atoms and having no lone pair.
This is an AX₄ geometry => tetrahedron
b. The central atom bonded to three substituent atoms and having one lone pair.
This is an AX₃E geometry => pyramidal
c. The central atom bonded to two substituent atoms ảnd having
one lone pair.
This is an AX₂E geometry => bent angular
d. The central atom bonded to two substituent atoms and having no lone pair.
This is an AX₂ geometry => linear
_______________________________
Based upon the VSEPR Theory there are 6 parent geometry configurations and associated derived geometries.
Parent geometries => Derivatives => Examples
linear => AX₂ (BeCl₂) trigonal planer => AX₃ (BH₃) => AX₂E (Bent) (:SnCl₂)tetrahedral => AX₄ (CH₄) => pyrimidal AX₃E (NH₃) => Bent AX₂E₂ (H₂O)trigonal bipyrimidal => AX₅ (PCl₅) => seesaw AX₄E (:SF₄) => T-shaped AX₃E₂ (ClF₃ (T-shaped) => linear AX₂E₃ (XeF₂)octahedral => AX₆ (SF₆) => sqr pyramid AX₅E (IF₅) => sqr planar AX₄E₂ (XeF₄) pentagonal bipyrimidal => AX₇ (ClF₇)For graphic images of each geometry do an internet search for 'molecular geometry'.
Plz help me well mark brainliest if you are correct!
Answers
Answer:
c: heat and erosine
Explanation:
Joan performed a shadow puppet play for her younger brother by shining a flashlight on paper cutouts behind a curtain. What happens to the light from the flashlight?
Answers
Answer:
The light is transmitted through the curtain.
Explanation:
I believe this might be the answer, please comment if it’s incorrect
What is the chemical formula for iodine trichloride?
ОА. ЗІСІ
O B. ICI:
O c. 1, Cl₂
O D. 12C1
Answers
Answer:
I₂CL₆
Explanation:
Answer12C1
Explanation: