6. How many sections are there to an SDS for a given chemical? *
(2 Points)
N.
8
10
14
16
Which statement best explains how weather is related to the water
cycle?
Answer:
Increased evaporationof water vapour from sea or land will increase rainfall
Answer:
Explanation:
increased evaporation of water vapor from sea to land will increase rainfall
elements have similar characteristics?
Periodic TaBle
oF The Elements
Answer:
See attachment.
Explanation:
Elements that are in the same group will definitely possess similar characteristics because they tend to have the same valence electron which determines their reactivity.
On a periodic table, elements in the same group can be found arranged on the same column in the periodic table.
Therefore the two elements that have similar characteristics are those two elements you can see on the same column in group 2. See the two elements indicated in the attachment below.
3.
Question
Many chemical warfare reagents readily convert into reactive 3-membered ring intermediates (although
maybe not the Joker's venom from the Batman comics). In turn, these intermediates can damage DNA by
what type of chemical reaction?
Your answer
O a. Elimination
O b. Sn1
OC. SN2
O d. None of the above
Answer:
I think it's letter B
Explanation:
Hope it helps correct if I'm wrong
Particle size directly affects which of the following spil properties?
Answer:
The size of soil particles is important. The amount of open space between the particles influences how easily water moves through a soil and how much water the soil will hold. Too much clay, in proportion to silt and sand, causes a soil to take in water very slowly. Such a soil gives up its water to plants slowly.
Write a balanced net ionic equation for each of the following aqueous metathesis reactions. Classify each reaction as a neutralization, precipitation, or gas--forming reaction.
A. Hydrobromic acid and cesium hydroxide.
B. Sulfuric acid and sodium carbonate.
C. Cadmium chloride and sodium sulfide.
Answer:
See explanation
Explanation:
A. This is a neutralization reaction.
Molecular equation;
HBr(aq) + CsOH(aq) ---------> CsBr(aq) + H20(l)
Complete ionic equation;
H^+(aq) + Br^-(aq) + Cs^(aq) + OH^-(aq) --------> Cs^+(aq) + Br^- + H20(l)
Net ionic equation;
H^+(aq) + OH^-(aq) --------> H20(l)
B. This is a gas forming reaction;
H2SO4(aq) + Na2CO3(aq) ------->Na2SO4(aq) + H2O(l) + CO2(g)
Complete ionic equation;
2H^+(aq) + SO4^-(aq) + 2Na^+(aq) + CO3^2-(aq) ------->2Na^+(aq) + SO4^-(aq) + H2O(l) + CO2(g)
Net ionic equation;
2H^+(aq) + CO3^2-(aq) -------> + H2O(l) + CO2(g)
C. This a precipitation reaction
Molecular equation;
CdCl2(aq) + Na2S(aq) ------->CdS(s) + 2NaCl(aq)
Complete ionic equation;
Cd^2+(aq) + 2Cl^-(aq) + 2Na^+(aq) + S^2-(aq) ---------> CdS(s) + 2Na^+(aq) + 2Cl^-(aq)
Net ionic equation;
Cd^2+(aq) + S^2-(aq) ---------> CdS(s)
How does a jacket keep you warm?
Answer:
Your body releases heat. Your jacket helps your body preserve that heat by shielding the heat from going out in the cold.
How many moles of phosphorus are in a sample of 40.4 grams of phosphorus I NEED HELP FAST
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 :)
What is the mass of 2.9 moles of calcium? Show all work!
Answer:
the mass of 2.9 moles of calcium is 116 g
Explanation:
The computation of the mass of 2.9 moles of calcium is shown below
As we know that
Mole = mass ÷ molar mass
where,
Moles be 2.9
And, we know that the molar mass of calcium be 40g/mol
Now put the values to the above formula
2.9 = Mass ÷ 40
So, the mass would be
= 40 × 2.9
= 116 g
Hence, the mass of 2.9 moles of calcium is 116 g
How many grams of iron can be extracted from 1.55 kg of iron(III) carbonate?
Hydrofluoric acid and water react to form fluoride anion and hydronium cation, like this:
HF(aq) + H2O(I) rightarrow F-(aq) + H3O+(aq)
At a certain temperature, a chemist finds that a 5.6 L reaction vessel containing an aqueous solution of hydrofluoric acid, water, fluoride anion, and hydronium cation at equilibrium has the following composition:
Compound Amount
HF 1.62 g
H2O 516 g
F- 0.163 g
H3O+ 0.110 g
Calculate the value of the equilibrium constant for this reaction.
Answer: The value of the equilibrium constant is 0.000023.
Explanation:
Equilibrium concentration of [tex]HF[/tex] = [tex]\frac{1.62g}{20.01g/mol\times 5.6L}=0.014M[/tex]
Equilibrium concentration of [tex]H_2O[/tex] = [tex]\frac{516g}{18g/mol\times 5.6L}=5.12M[/tex]
Equilibrium concentration of [tex]F^-[/tex] = [tex]\frac{0.163g}{18.9g/mol\times 5.6L}=0.0015M[/tex]
Equilibrium concentration of [tex]H_3O^+[/tex] = [tex]\frac{0.110g}{18g/mol\times 5.6L}=0.0011M[/tex]
The given balanced equilibrium reaction is,
[tex]HF(aq)+H_2O(l)\rightleftharpoons F^-(aq)+H_3O^+(aq)[/tex]
The expression for equilibrium constant for this reaction will be,
[tex]K_c=\frac{[F^-]\times [H_3O^+]}{[HF]\times [H_2O]}[/tex]
[tex]K_c=\frac{(0.0015\times 0.0011}{(0.014\times 5.12)}[/tex]
[tex]K_c=0.000023[/tex]
Thus the value of the equilibrium constant is 0.000023.
NO GO*GLE ANSWERS PLEASE!
Tyrel is learning about a certain kind of metal used to make satellites. He learns that infrared light is absorbed by the metal, X-ray light is transmitted through the material, and visible light is reflected off the metal. Tyrel wonders if the metal will get warm if he shines the lights on it.
Answer:
Tyrel is learning about a certain kind of metal used to make satellites. He learns that infrared light is absorbed by the metal. X-ray light is transmitted through the metal. ... Yes, light can cause the metal to get warm because light carries energy.
calculate the wavelength of the first line in the lymen series of hydrogen spectrum
Which Sphere does condensation occur.
Answer:
The atmosphere, I believe.
Explanation:
PLZ HELP NEED HELP ASAP
Answer:
The third answer choice.
Question
In Woodward's 1952 synthesis of cholesterol, an elimination reaction was used to remove the C20 alcohol
substituent as shown below. The transformation is performed with acetic acid (hint: as opposed to a strong
base). Would you classify this as an E1 or E2 elimination?
Ola.E2
O b, E1
.
In an investigation, the volume of a material is measured
as 80.0 cm3 and its mass is measured as 253 g. Which
calculation of density correctly uses the precision rules:
3.1625 g/cm3, 3.163 g/cm3, 3.16 g/cm3, 3.2 g/cm3, or 3
g/cm3?
Answer:
3.2 g/cm3
Explanation:
Mass = 253 g
Volume = 80.0 cm3
Density = Mass / Volume = 253 g / 80.0 cm3
Density = 3.1625 g/cm3
The precision rule means the answer must not have more significant values than the value with the least number of significant figures. In this case, the value with the least number of significant figures is 80.0 with two signiificant figures. Hence;
Answer = 3.2 g/cm3
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
What does the fossil record tell us about the evolution of the hominin skull?
The face grew wider as hominins evolved
The face stuck out farther from the rest of the skull as hominins evolved
The part of the skull surrounding the brain grew larger as hominins evolved
The part of the skull surrounding the brain grew more pointed as hominins evolved
Answer:
The part of the skull surrounding the brain grew larger as hominins evolved
The skulls are all casts of the original fossils. By determining the skulls we can explore the characteristics which reflect the evolutionary relationships. The part of the skull surrounding the brain grew larger as hominins evolved. The correct option is C.
What is hominin evolution?Hominin evolution is characterized by two mains trends, transition to bipedality and increase in brain size. Fossil evidence shows that both trends had a major impact on the structure and function of the hominin skull.
Hominins or homo species are characterized by relatively and absolutely large brains, a modern skeleton, reduced tooth and jaw size and an involvement in cultural activities. Hominins have a larger cranial capacity and this is an indication of their brain size.
In addition, the contour of the hominin forehead eventually shifted from being angled to more vertical.
Thus the correct option is C.
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a'Zorria Ward
An elevator traveled 15 floors (150 ft) at a speed of 4.5 m/s. What additional information is needed to determine the velocity of the elevator?
the direction the elevator traveled
how long the elevator was stationary
O how many times the elevator stopped
O the total mass of the elevator plus anything in it
Explanation:
An elevator traveled 150 ft at a speed of 4.5 m/s. What additional information is needed to determine the velocity of the elevator?
Velocity is vector quantity.So it needs direction in addoition to speed.
The velocity of an object is the rate of change of its position with respect to a frame of reference, and is a function of time. Velocity is equivalent to a specification of its speed and direction of motion.
Why is co2 so bad for our bodies and why do we need to remove it? In the context of protons and ions acid/base solution.
Why didn't you just clean the spill with water?
Answer:
if you did it would probably make it bigger...
Explanation:
:)
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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ASAP!!
Identify the limiting reactant when 6 moles of CaCl2 is combined with 6 moles of Al2O3.
Reaction: 3CaCI2 + Al2O3 -> 3CaO + 2AlCI3
Answer:
just downloud smart
Explanation:
thank me later
How many moles are in 3.2 x 10^25 atoms of silver?
53 mol Ag
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableMolesAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[Given] 3.2 × 10²⁵ atoms Ag
[Solve] moles Ag
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
[DA] Set up: [tex]\displaystyle 3.2 \cdot 10^{25} \ atoms \ Ag(\frac{1 \ mol \ Ag}{6.022 \cdot 10^{23} \ atoms \ Ag})[/tex][DA] Multiply/Divide [Cancel out units]: [tex]\displaystyle 53.1385 \ mol \ Ag[/tex]Step 4: Check
Follow sig fig rules and round. We are given 2 sig figs.
53.1385 mol Ag ≈ 53 mol Ag
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!
Suppose you are provided with a 36.89 g sample of potassium chlorate to perform this experiment. What is the mass of oxygen you expect
to release upon heating?
Answer:
14.45 g of O₂.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
2KClO₃ —> 2KCl + 3O₂
Next, we shall determine the mass of KClO₃ that decomposed and the mass of O₂ produced from the balanced equation. This can be obtained as follow:
Molar mass of KClO₃ = 39 + 35.5 + (16×3)
= 39 + 35.5 + 48
= 122.5 g/mol
Mass of KClO₃ from the balanced equation = 2 × 122.5 = 245 g
Molar mass of O₂ = 2 ×16 = 32 g/mol
Mass of O₂ from the balanced equation = 3 × 32 = 96 g
SUMMARY:
From the balanced equation above,
245 g of KClO₃ decomposed to produce 96 g of O₂.
Finally, we shall determine the mass of O₂ produced by heating 36.89 g of KClO₃. This can be obtained as follow:
From the balanced equation above,
245 g of KClO₃ decomposed to produce 96 g of O₂.
Therefore, 36.89 g of KClO₃ will decompose to produce =
(36.89 × 96)/245 = 14.45 g of O₂
Thus, 14.45 g of O₂ were obtained from the reaction.
True of false
nad + and fad are also used to shuttle energy from the favourable oxidations that take place in anabolism, to the unfavourable reactions that take place in catabolism.
Answer:
true
Explanation:
In order to predict the outcome of the reaction, write the molecular, full ionic, and net ionic equations for a mixture of aqueous ammonia (NH3) and silver nitrate (AgNO3) in which a diammonia silver complex ion is produced. Molecular: Full ionic: Net ionic: Predict your observations based on above molecular equation: Actual observations:
Answer:
See explanation
Explanation:
Full molecular equation;
2NH3(aq) + AgNO3(aq) -------> [Ag(NH3)2]NO3(aq)
Full ionic equation
2NH3(aq) + Ag^+(aq) + NO3^-(aq) --------> [Ag(NH3)2]^+(aq) + NO3^-(aq)
Net ionic equation;
2NH3(aq) + Ag^+(aq) --------> [Ag(NH3)2]^+(aq)
When Silver nitrate is mixed with a solution of aqueous ammonia, a white and cloudy solution was observed.
what explains the bonding in a compound made from carbon and hydrogen
1) ch4 because every hydrogen gets two electrons to bond
2) ch4 because 8 electrons are shared in this molecule
Answer:
2) ch4 because 8 electrons are shared in this molecule
Explanation:
The bond between carbon and hydrogen in the molecule; CH4 is a covalent bond. This bond involves sharing of electrons. Carbon has a valency of 4 and needs four more electrons to complete it's electronic configuration. These 4 electrons are taken care of by the 4 hydrogen atoms which each have a valency of 1.