Answer:
1.30 mol P
Explanation:
take what is given to you (40.4g). now divide it by the molar mass of the asked element (phosphorus = 30.97g/mol)
40.4g P / 30.97g/mol P = 1.30 mol P
hope this helps :)
Which phrase describes a compound that consist of two elements
Carbon dioxide, nitrous oxide, and methane are all compounds that consist of two elements
How would you write 0.620 in scientific notation?
Fill in the blanks.
The regioselectivity of a reaction is often based on the energetics of the reaction. The kinetic product of a reaction is the product with the ____________.
The kinetic product is favored when the temperature is ________.
The thermodynamic product of a reaction is the product with the ____________.
The kinetic product is favored when the temperature is ___________.
Answer:
vcfg
Explanation:
The kinetic product of a reaction is the product with the high energy and favored when the temperature is low. The thermodynamic product of a reaction is the product with the low energy and favored when the temperature is high.
What is regioselectivity?Regioselectivity is that part of any chemical reaction where if product is formed by more than one ways than only one way will be prefererd in this condition.
In any system if chemical reaction is occur at low temperature then the fast formed product is the stable product which is kinetically favored, and have the high energy.In any system if chemical reaction is occur at high temperature then the slow formed product is the stable product which is thermodynamically favored, and have the low energy.Hence correct options are high energy, low, low energy and high.
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Mention two functions performed by the concentrated sulfuric acid in the reaction
Answer:
Concentrated sulfuric acid is used as a catalyst, and has a dual role:
-Speeds up the reaction.
-Acts as a dehydrating agent, forcing the equilibrium to the right and resulting in a greater yield of ester.
The two functions performed by the concentrated sulfuric acid in the reaction is that Concentrated sulphuric acid often removes molecules of water from formic acid and it acts as a dehydrating agent in creation of carbon monoxide.
The function of the concentrated sulfuric acid in a reaction is that Concentrated sulfuric acid can be used as a catalyst.
It help to Speeds up the reaction and can also be a dehydrating agent, by bringing in the equilibrium to the right and leading to a greater yield of ester.
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Usually potassium hydrogen phthalate is kept very pure. But Stu Dent thinks the bottle of potassium hydrogen phthalate has been accidently mixed with sodium chloride salt. He decides to use a titration to determine the amount of potassium hydrogen phthalate present. He weighs 2.3854 g of the contaminated potassium hydrogen phthalate mixture. The titration uses 17.47 mL of 0.5000 M sodium hydroxide. Use the titration volume and concentration to calculate the moles of potassium hydrogen phthalate actually reacted. Then use the molar mass (204.2 g/mol) to calculate the mass of potassium hydrogen phthalate actually reacted. Enter the mass to 4 significant digits with units of g.
Answer:
1.784 g
Explanation:
The equation of the reaction is;
NaOH(aq) + KHC8H4O4(aq) --------> KNaC8H4O4(aq) + H2O(l)
Number of moles of NaOH reacted = 17.47/1000 * 0.5000 M
Number of moles of NaOH reacted =8.735 * 10^-3 moles
From the reaction equation;
1 mole of NaOH reacted with 1 mole of KHC8H4O4
Hence, 8.735 * 10^-3 moles of NaOH reacts with 8.735 * 10^-3 moles of KHP.
So,
Mass of KHP reacted = 8.735 * 10^-3 moles * 204.2 g/mol = 1.784 g
Which combination will make a buffer?
A. NaOH and NaCl
B. KOH and KC1
C. HC1 and NaCl
D. CH3COOH and CH3COONa
Answer:
D
Explanation:
A buffer solution contains (1)a weak base and its salt, or (2) a weak acid and its salt.
So, the combination of the weak acid CH3COOH and its salt CH3COONa will make a buffer.
Answer:
D. CH3COOH and CH3COONa
Explanation:
A buffer is made of:
- a weak acid + its conjugate base
- a weak base + its conjugate acid
A. NaOH is a strong base
B. KOH is a strong base
C. HCl is a strong acid
In what type of reaction is water always a product
when hydrogen and oxygen combine then they form water as product
also in neutralization reaction water form as product
hope it helps
Water is always a product in a type of chemical reaction called a neutralization reaction.
A reaction is a process that involves the transformation of one or more substances into one or more different substances.
Neutralization reaction is type of reaction occurs when an acid and a base react together to form a salt and water. The general equation for a neutralization reaction is:
[tex]\rm acid + base \rightarrow salt + water[/tex]
In this type of reaction, the hydrogen ions ([tex]\rm H^+[/tex]) from the acid combine with the hydroxide ions ([tex]\rm OH^-[/tex]) from the base to form water ([tex]\rm H_2O[/tex]). The remaining ions from the acid and the base combine to form a salt.
Therefore, water is always a product in a neutralization reaction, which occurs when an acid and a base react together to form a salt and water.
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A chemical plant produces ammonia using the following reaction at high
temperature and high pressure. Which issue are plant engineers and
investors most likely to see as a drawback of this method?
3H2 + N2 = 2NH3 + energy
A. This reaction system will solidify at a higher temperature and
obstruct the equipment.
B. The high temperature will increase the rate of the reactant-favored
reaction at equilibrium.
C. The high pressure will increase the rate of the reactant-favored
reaction at equilibrium.
D. Maintaining a high temperature will require burning fossil fuels or
using a great deal of electricity.
Answer:
D. Maintaining a high temperature will require burning fossil fuels or
using a great deal of electricity.
Explanation:
The chemical plant produces ammonia using the following reaction at high temperature and high pressure the issue is "Maintaining a high temperature will require burning fossil fuels or using a great deal of electricity.
What is the chemical plant?An industrial processing facility known as a "chemical plant" produces chemicals, typically on a large scale.
What are fossil fuels?The components of fossil fuels are decaying plants or animals. These fuels may be consumed to provide energy and could be discovered in the crust of the Earth. Fossil fuels include, for example, coal, oil, as well as natural gas.
Therefore, the chemical plant produces ammonia using the following reaction at high temperature and high pressure the issue is "Maintaining a high temperature will require burning fossil fuels or using a great deal of electricity.
Hence, the correct answer will be option (D)
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ILL GIVE BRAINLIEST!
Answer:
A since dormant volcanoes haven't erupted for a long time but are expected to erupt again in the future.
Explanation:
Which of the following answers is true for the following statement?
The conjugate acid of a strong base is:
O aweak acid
O an amphiprotic acid
O a polyprotic acid
O a lousy (or very weak) acid
O a strong acid
it is either "aweak acid or a lousy (or very weak) acid"
Sugar is made of carbon , hydrogen, and oxygen atoms. sugar is ?
Answer:
The white stuff we know as sugar is sucrose, a molecule composed of 12 atoms of carbon, 22 atoms of hydrogen, and 11 atoms of oxygen (C12H22O11). Like all compounds made from these three elements, sugar is a carbohydrate.
Explanation:
TEST QUESTION FOR CHEMISTRY GENIUSES ONLY...
Answer:
HBr has an electronegativity difference of .76 because Hydrogen's electronegativity is 2.2 and the electronegativity of Bromide is 2.96, and by the chart, it has a polar-covalent bond
Hope this helps!
Please help me, im studying for finals and i need an answer to this question! Will mark brainliest for the answers that are the best!
Answer:
group of people assembled for religious worship.
a second definition:
a gathering or collection of people, animals, or things.
other words that mean the same thing as cogeneration:
assembly gathering assemblage convocation crowd flock group mass multitude!
I just need one more brainlest so if this helped! <3
HELP
Carla and Maurice are recording the temperatures of classrooms at their school, but they're using two different
thermometers. They plan to present their readings in both kelvins and degrees Celsius. Help the students convert their
temperatures from one scale to the other.
Type the correct answer in each box.
Answer:
1. 25.19
2. 301.57
Explanation:
it says it's correct...
The conversion of units of temperatures from one scale to the other which is measure by Carla and Maurice are given as.
298.34 K = 25.34°C
28.42°C = 301.42 K
How many units of temperature there?The temperature can be measure by using three units.
Kelvin abbreviate as KCelsius abbreviate °CFahrenheit abbreviate FRelationship between Kelvin (K) and Celsius (°C)
Let the value of temperature in Celsius (°C) unit as X °C, then value of this temperature in Kelvin (K) is,
X °C = 273 + X °C = (273 + X) K
Let the value of temperature in Kelvin (K) as Y K , then value of this temperature in Celsius (°C) is,
Y K = Y K - 273 = (Y - 273) °C
If 298.34 K
Then 298.34 K = 298.34 K - 273 = 25.34°C
If 28.42°C
Then, 28.42°C = 273 + 28.42°C = 301.42 K
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what is the difference between zinc and magnesium
10. Many cooking pans are made of aluminium although it is a reactive metal, Explain.
Answer:
Aluminium is a highly reactive metal yet it is used to make utensils for cooking this is because aluminium reacts with oxygen present in air to form a thin layer of Aluminium oxide is oxide layer is very stable and prevent for the reaction of aluminium with oxygen
Which of the following represents a beta decay?
O A. 220/86 Rn → 294/84Po + 4/2 He
O B. 60/28 Ni → 60/28 Ni + y
C. 235/93 Np → 23/91 Pa+ x
O D. 213/83 Bi → 214/84 Po+0/-1e
Answer:
Option D
Explanation:
Parent isotope has 83 protons, daughter isotope has only one more proton (84). Beta particle is very small, atomic mass of 212 stays the same in beta decay.
[tex]^2^1^2_8_3Bi\;\rightarrow\;^2^1^2_8_4Po\;+\;^0_-1e[/tex] represents a beta decay. Parent isotope has 83 protons, daughter isotope has only one more proton (84). Beta particle is very small, atomic mass of 212 stays the same in beta decay.
What beta decay?In nuclear physics, beta decay (β-decay) is a type of radioactive decay in which a beta particle (fast energetic electron or positron) is emitted from an atomic nucleus, transforming the original nuclide to an isobar of that nuclide.
[tex]^2^1^2_8_3Bi\;\rightarrow\;^2^1^2_8_4Po\;+\;^0_-1e[/tex]
In beta decay, one of the neutrons in the nucleus suddenly changes into a proton, causing an increase in the atomic number of an element.
Hence, option D is correct.
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Phosphorus is implanted into silicon. The implant parameters are a dose of 1015cm-2at an energy of 150keV.a)Find the depth of the peak of the implant profile and its value at that depth.b)If the wafer originally had 1016cm-3of boron uniformly distributed throughout, find the depth(s) at which the concentration of phosphorus is equal to the concentration of boron.
Answer:
a) ≈ 4.99 / cm^3
b) 0.515 um
Explanation:
Given data:
energy = 150 Kev
dose of 10^15 cm^-2
A) find the depth of the peak of the implant profile and its value at that depth
expression for implant profile = written below in the attached file
value of the peak depth ≈ 4.99 / cm^3
B ) determine the depth at which the concentration of phosphorus is equal concentration of boron
= 0.515 um
attached below is the detailed solution to the problem
Water Cycle, what percentage of Earths water can be found in soil?
Based on appearances, which group of animals likely has the greatest genetic diversity?
bears
horses
whales
birds
What volume, in mL, of 0.100 M NaOH is required to neutralize 35.0 mL of 0.102 M hydroiodic acid HI?
Answer:
35.7 mL NaOH
Explanation:
M1V1 = M2V2
M1 = 0.100 M NaOH
V1 = ?
M2 = 0.102 M HI
V2 = 35.0 mL
Solve for V1 --> V1 = M2V2/M1
V1 = (0.102 M)(35.0 mL) / (0.100 M) = 35.7 mL NaOH
I need help with chemistry :(
Answer:
How may we help kind sir
Explanation:
and if this was for points thanks
which of the following is the ether- containing analgesic drug (pain fever reducer) that likely contributed to the death of famous aviator howard hughes
Answer:
Happy Birthday HAHAHAHAHAYAHYAHAHAH
Phenacetin is the ether-containing analgesic drug that is likely to contribute to the death of famous aviator Howard Hughes.
What is phenacetin?It is a drug used for relieving pain and reducing fever.
It was taken off the market as a medicine in the 1970s because it was deemed hazardous.
This was the reason for the death of the famous aviator Howard Hughes.
The chemical formula of [tex]\rm C_1_0H_1_3NO_2[/tex].
Thus, the correct option is C, phenacetin.
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How many mL of 0.25 M NaOH would have 0.18 moles of NaOH?
Answer:
720 mL
Explanation:
To answer this problem we'll use the definition of molarity:
Molarity = moles / litersWith that in mind we can calculate the volume in liters:
0.25 M = 0.18 moles / litersliters = 0.72 LFinally we convert liters to mL:
0.72 L * 1000 = 720 mLThus 720 mL of 0.25 M NaOH would have 0.18 moles of NaOH.
Which of the following has the highest viscosity?
A. Honey
B. Milk
C. Water
D. Oil
The highest viscosity has honey
Answer:
The highest viscosity is honey.
Safurared Solution changes into Unsaturated
by heating
Answer:
Yes it is because heating expands molecules of solution which helps to form a solution as it acts as solvent solution.
Explanation:
Hey! I was wondering how to get the solution to this question!
A solution was prepared by dissolving 0.541 g of benzoic acid (HC6H5COO) in 100 mL of
water. The pH was measured to be 2.78. What is the Ka for benzoic acid?
Answer:
6.22 × 10⁻⁵
Explanation:
Step 1: Write the dissociation reaction
HC₆H₅COO ⇄ C₆H₅COO⁻ + H⁺
Step 2: Calculate the concentration of H⁺
The pH of the solution is 2.78.
pH = -log [H⁺]
[H⁺] = antilog -pH = antilog -2.78 = 1.66 × 10⁻³ M
Step 3: Calculate the molar concentration of the benzoic acid
We will use the following expression.
Ca = mass HC₆H₅COO/molar mass HC₆H₅COO × liters of solution
Ca = 0.541 g/(122.12 g/mol) × 0.100 L = 0.0443 M
Step 4: Calculate the acid dissociation constant (Ka) for benzoic acid
We will use the following expression.
Ka = [H⁺]²/Ca
Ka = (1.66 × 10⁻³)²/0.0443 = 6.22 × 10⁻⁵
(R)-Limonene is found in many citrus fruits, including oranges and lemons. Draw its structures and identify the relationship between them.
Answer:
we cant draw jn this
Explanation:
because it contin citric acid
define saturated and unsaturated fats
Answer:
i don't no the
answer
i am sorry
Answer:
Saturated fats: Saturated fats are a type of fat-containing a high proportion of fatty acid molecules without double bonds, considered to be less healthy in the diet than unsaturated fat.
Unsaturated fats: Unsaturated fats are a type of fat-containing a high proportion of fatty acid molecules with at least one double bond, considered to be healthier in the diet than saturated fat.
Look at Periodic Table. Which
element has 7 valence
electrons and is in period 3?
A. Fluorine
B. Sulfur
C. Chlorine
D. Bromine