Drag the number to the correct location based on the number of significant figures.
Answers
Significant figures
0.0093: Leading zeros are never significant. This number has two significant figures, nine and three.
120.9: Nonzero numbers are significant and zeros between those numbers are significant, too. This number has four significant figures.
1.000: Trailing zeros are significant if there is a decimal point. This number has four significant figures.
1.008: Nonzero numbers are significant and zeros between those numbers are significant, too. This number has four significant figures.
670: Trailing zeros are not significant. This number does not have a decimal point. So, it has two significant figures.
0.184: Nonzero numbers are significant. This number has three significant figures.
1.30: Trailing zeros are significant if there is a decimal point. This number has three significant figures.
Related Questions
Explain briefly why the tendency of a polymer to crystallize decreases with increasing molecular weight.
Answers
As the molecular weight increases, polymers tend to crystallize due to how harder it is for chains that are side by side to align due to the increasing length of the chain which makes it difficult to turn out the ordered atomic array.
How does polymer crystallize?Polymers can be natural or synthetic substances. Polymers can be crystalline or amorphous, depending on how their molecular chains are structured.
Polymers are found in proteins and nucleic acids. Crystalline polymers, have chains that are positioned together, they don't bend easily under pressure. A typical example of a crystalline polymer is a diamond-hard structure.
In summary, whenever there is an increase in molecular weight, there is always a notable decrease in crystallinity. The crystallinity of a polymer generally affects its properties which include properties such as the density of the polymer and its hardness.
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The equation below shows hydrogen reacting with oxygen to produce water.
2H2 + O2 Right arrow. 2H2O
If 16 mol of oxygen were reacted with excess hydrogen gas, how many moles of water would be produced?
4.0 mol
8.0 mol
16 mol
32 mol
Answers
The equation below shows hydrogen reacting with oxygen to produce water 2H₂ + O₂ → 2H₂O If 16 mole of oxygen were reacted with excess hydrogen gas, then 32 mole of water would be produced
Mole is the amount of substance of a system which contains as many elementary entities
Here given data is
Hydrogen reacting with oxygen to produce water and the reaction is
2H₂ + O₂ → 2H₂O
16 mol of oxygen were reacted with excess hydrogen gas
Then we have to calculate moles of water would be produced = ?
Moles of oxygen = 16 moles
From the balanced equation
1 mole oxygen react to give 2 moles of water
16 moles oxygen react to give 2×16 = 32 moles
Therefore 32 moles of water would be produced in the reaction
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d. 32 mol in case you dont want to read that
Which of the following units is used when measuring electrical power?
Answers
Answer:
Joules/sec and watts.
Explanation:
1 Joule/sec is a rate of energy expending every second. It is equal to a watt, the English term.
What is the empirical formula of a compound composed of 81. 71% c and 18. 29% h by mass?.
Answers
m
C
=
0.8171
×
100
g
=
81.71
g
m
H
=
0.1829
×
100
g
=
18.29
g
Using the known molar masses, the molar quantities of carbon and hydrogen in this sample are:
n
C
=
81.71
g
×
m
o
l
12.01
g
=
6.803
m
o
l
n
H
=
18.29
g
×
m
o
l
1.01
g
=
18.11
m
o
l
The molar ratio of the elements is:
C
6.803
H
18.11
If we divide both subscripts by the smallest value and multiply by 3, then the empirical formula will be:
C
3
H
8
Which statement about liquids and gases is correct? A -1 cm³ of gas contains more particles than 1 cm² of liquid.
B- A given mass of liquid has a fixed volume at room temperature.
C- Particles in a liquid can easily be forced closer together.
D Particles in a liquid have fixed positions.
Answers
Answer:
A given mass of liquid has a fixed volume at room temperature.
Explanation:
Most of the weather of the world is based upon changes in the moisture, pressure, and/or temperature of the.
Answers
Most of the weather of the world is based upon changes in the moisture, pressure or temperature of the troposphere.
What is the importance of troposphere?The layer closest to the surface of the Earth is troposphere. This layer goes up to twenty kilometers above the Earth. The troposphere is very essential as it contains the weather of the Earth and also greenhouse gases to maintain the temperature on Earth.
Troposphere layer has the air humans breathe and the clouds in the sky. The air is densest in this lowest layer and the troposphere has three-quarters of the mass of the entire atmosphere. The air in troposphere is 78% nitrogen and 21% oxygen.
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Calculate the volume in liters of a 7.76 g/dL iron(III) bromide solution that contains 427. g of iron(III) bromide (FeBr3).Round your answer to 3 significant digits.
Answers
Answer
5.50 L of solution
Procedure
We will use dimensional analysis to solve this question. After getting the answer, we will round to 3 significant digits. All the previous can be done in a single-step calculation.
[tex]427\text{ g}\frac{1\text{ dL}}{7.76\text{ g}}\frac{1\text{ L}}{10\text{ dL}}=5.5026\approx5.50\text{ L}[/tex]when a weak acid react with a weak base. what's the result
Answers
Answer:
weak acids and weak bases only ionize partially. Therefore, when they are mixed, it generally results in a reversible reaction with the formation of a conjugate acid and a conjugate base as products.Weak acid-weak base neutralization reaction in which a weak acid reacts with a weak base to form a neutral salt and water.How many grams of sodium hydroxide (NaOH) do you need to make 6.5 L of 1.0M solution?
Answers
260grams
Explanations:The formula for calculating the moles of NaOH is expressed as
[tex]\begin{gathered} moles=molarity\times volume \\ moles\text{ of NaOH}=1.0M\times6.5L \\ moles\text{ of NaOH}=6.5moles \end{gathered}[/tex]Determine the required mass of NaOH
[tex]\begin{gathered} Mass\text{ of NaOH}=moles\times molar\text{ mass} \\ Mass\text{ of NaOH}=6.5\cancel{moles}\times\frac{40g}{\cancel{mole}} \\ Mass\text{ of NaOH}=260grams \end{gathered}[/tex]Hence the grams of sodium hydroxide (NaOH) you need to make 6.5 L of 1.0M solution is 260grams
Some are based on other
languages, for example the
symbol
is
from the Latin "ferrium."
Answers
Answer:
Fe
Iron – Ferrum (Fe)
Iron's Latin name, 'ferrum', gives it its symbol Fe; it simply means 'iron' or 'sword', and is possibly of Semitic origin.
Which of the following is true of
the eye of a hurricane?
A. Warm, moist bands of air move around the
eye.
B. The eye makes up the outer most layer of the
storm.
C. Hot and humid air rises up through the eye.
D. It only appears at the very beginning and very
end of the storm.
Answers
Answer: a
Explanation:
Where would one find the s-block, p-block, d-block and f-block elements on the periodic table?
Answers
Answer:
You can find p-block elements on the periodic table in groups 13 to 18, you can find the s-block on the periodic table in group 1, Group 3 through Group 12 are d-block elements, and The f-block elements, found in the two rows at the bottom of the periodic table, are called inner transition metals and have valence electrons in the f-orbital's.
Explanation:
Hope this helps!
Which of the following describes how difficult it is to remove a valence electron from an atom of a particular element?
A: Electron Affinity
B: Ionization energy
C: Atomic Radius
D: Electronegativity
Answers
Answer:
B: ionization energy
Explanation:
The metalloids are located along
a stair-step line between the metals and the
nonmetals on theperiodic table. Referring to the
periodic table as needed, draw the stair-step line
on this table. Then, write the symbol for each
metalloid in the correct location on this table.
Answers
Here is the diagram which it shows the arrangement of metalloids in the modern periodic table.
Metalloids are the elements which shows both the characteristics of metals and non-metals.
Boron - B, Silicon - Si, Germanium - Ge, Arsenic - As, Antimony - Sb, Tellurium - Te, Polonium - Astatine are the elements belongs to metalloids
what is the molarity of chloride ion in a solution made by dissolving 1.500g of aluminum chloride in a total volume of 250.0ml?
Answers
Answer: The Molarity of chloride ion in the solution is 0.1344 m.
Explanation:
For this question we first have to find the no. of moles of the given compound.
moles of Aluminium chloride is (n)= 1.5/133.5=0.0112. (given mass/molecular mass)
no of chloride ions present in 1 mole of this given compound = 3
moles of chloride ions present in 0.0112 moles of compound = 0.0112x3=0.0336
molarity of CL ion is = 0.0336/(250/1000)=0.1334 m
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A spray paint can at 24 Celsius has a pressure of 20 psi. If it is placed in a fire at 480 Celsius what will the pressure become?
Answers
According to Gay Lussac's law, the pressure of a given mass of gas is directly proportional to its temperature provided that volume is constant. Mathematically;
[tex]\begin{gathered} P\alpha T \\ P=kT \\ k=\frac{P}{T} \\ k=\frac{P_1}{T_1}=\frac{P_2}{T_2} \end{gathered}[/tex]From the given question, we are given the following parameters:
[tex]\begin{gathered} P_1=20psi \\ T_1=24^0C=24+273=297K \\ T_2=480^0C=480+273=753K \\ P_2=\text{?} \end{gathered}[/tex]Substitute the given parameters into the formula as shown:
[tex]\begin{gathered} P_2=\frac{P_1T_2}{T_1} \\ P_2=\frac{20psi\times753\cancel{K}}{297\cancel{K}} \\ P_2=\frac{15,060}{297} \\ P_2=50.71\text{psi} \end{gathered}[/tex]Therefore the pressure of the spray paint at 480 celsius is 50.71psi
in the sn1 mechanism conditions, silver nitrate is added. in principle, the nitrate anion can act as a nucleophile, but is so poor of a nucleophile that any chemical reactivity from it is negligible. knowing that, what is the nucleophile in the sn1 reaction in the reactions using silver nitrate if it is not the nitrate ion?
Answers
Nitrate performs an crucial function withinside the technique as nicely with the aid of using performing as a nucleophile that promotes a thermodynamic self-correcting technique.
the response of an alkyl chloride with silver nitrate (AgN03) to shape silver chloride and an alkyl nitrate, the silver atom coordinates with the chloride facilitating the formation of the carbocation. Nitrate ion is one of these susceptible nucleophile, that direct SN2 displacement can't occur.
The nitrate is a terrible nucleophile. It has three oxygen atoms pulling electron density far from the nitrogen, and there may be additionally a truthful quantity of resonance that lowers the nucleophilicity notably as well SN1 response mechanism follows a step-with the aid of using-step technique in which first, the carbocation is shaped from the elimination of the leaving group.
Then the carbocation is attacked with the aid of using the nucleophile. Finally, the deprotonation of the protonated nucleophile takes location to present the specified product.
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What is the most stable form of Calcium in terms of nuclear stability?
Answers
Answer
Calcium - 40 is the most stable and most likely to be found occurring naturally
Explanation
Nuclear stability means that the nucleus of the element is stable enough to not decay with the passing of time, this decay is known as radioactivity. When it comes to Calcium, we have many isotopes of this element, but only a few have such a long half-life that we can consider them to be stable, and Calcium - 40 is the most stable and common of them.
Describe the intermolecular forces in terms of strength and properties?
Answers
Liquids have characteristics that fall somewhere in between those of solids and gases, yet they resemble solids more. Intermolecular forces, as opposed to intramolecular forces, such as the covalent bonds that bind atoms in molecules and polyatomic ions, keep molecules in a liquid or solid together. In comparison to covalent bonds, intermolecular forces are often significantly weaker. For instance, in 1 mol of water, the intramolecular forces must be overcome in order to break both O-H bonds, while the intermolecular forces must be overcome in order to turn 1 mol of liquid water into water vapor at 100 °C, which needs just around 41 kJ. (Despite this figure appearing to be modest, the intermolecular forces in liquid water are some of the highest intermolecular forces ever measured.
pls answer question will mark brainliset tyty
Answers
Answer: A. The population is growing rapidly
3. Categorize the following physical properties as physical properties recognized by our sense organs or measurable physical properties a. Density b. odor c. taste d. melting point e. color f. conductivity
Answers
Melting point, density, color, are measurable physical properties.
A physical property is a characteristic that may be observed or quantified without changing the composition. Density is another illustration of a physical characteristic. Your coin is still composed of the same material as it was before it was dropped into the fountain, despite the fact that it may be a little moist. Additional examples of physical attributes are color, mass, smell, boiling point, volume, and temperature.
Some physical qualities, such density and color, may be detected without changing the physical state of the item being studied. Only when matter undergoes a physical transition can other physical properties, like the melting point of iron or the freezing point of water, be seen.
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Which formulas represent one ionic compound and one covalent compound?
a. N, and SO.
b. Cl, and H,S
c. BaCl and N.O,
d. Na,O and CaO
Answers
The formula NaO,CaO represents one ionic compound and one covalent compound.
An ionic compound is formed by ions made up of charged particles.A covalent compound is formed by sharing of electrons between two different elements.N exists as N2 which is covalently bonded and SO exists as S=O which is covalently bonded.Cl exists as Cl2 which is formed by sharing of electrons and is covalently bonded.HS has an electronegativity difference of 0.4 which is non-polar covalent compound.BaCl2 exists as an ionic compound as it is formed on basis of electrostatic attraction.NO exists as N=O which is a covalent compound.NaO exists as ionic compound and CaO exists as covalent compound.
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25.As a solution becomes more acidic, the pH of the solution...Select one:a. increases.b. decreases.c. remains unchanged.d. quickly increases and then gradually decreases.
Answers
Answer:
[tex]B\text{ : decreases}[/tex]Explanation:
Here, we want to know what happens to a solution that becomes more acidic
A lesser ph (1-7) indicates acidity with the acidity being higher as the number becomes smaller
What this means is that a solution with a pH of 3 is more acidic than a solution with a pH of 5
Thus, when the acidity increases, it is expected that the pH of the solution decreases (it becomes smaller in number)
i need help on all of them please & thank you!! Unfortunately Punnett Squares are not always for finding out the best parts about parenting. They are often, as you will see in the next few lessons, often used to determine the probability of a disease being passed on to a child. We’ll have you try one and see what that looks like. One such disease is Cystic Fibrosis. Let’s assume both parents are heterozygous for Cystic Fibrosis. That means both parents carry the recessive gene for the disease, but because of the dominant genes they have, they don’t have it. However, they want to know if they try to have a child, what the chances of the child would be for having Cystic Fibrosis?
Answers
Answer:
question 1:
answered previously
question 2:
a= 50% chance tall daughter
b= 50% chance short daughter
question 3:
a= 75% chance of not having cystic fibrosis
b= 25% chance of having cystic fibrosis
question 3:
Explanation:
question 2:
the question specified on the offspring being female so when stating the gametes we must include the XX chromosomes for the female and XY chromosome for the male.
let us denote that:
T = tall gene
t = short gene
Father 》 Mother
parental phenotype: Short 》 tall
parental genotype: XtYt 》 XTXt
parental gametes: (Xt) (Yt) 》 (XT) (Xt)
random fertilization:
Xt Yt
XT XTXt XTYt
Xt XtXt XtYt
F1 generation sex: Male 》Female
F1 chromosomes: XY 》 XX
F1 gen phenotype: Tall 》 Tall
F1 gen genotype: Tt, tt 》 Tt, tt
ratio: 2 : 2 or 1 : 1
percentage gender: 50% 》 50%
percentage tall: 50% 》 50%
question 3:
denoting:
N = normal (dominant)
c= cystic fibrosis (recessive)
parental phenotype: Normal 》Normal
parental genotype: Nc 》 Nc
random fertilization:
N c
N NN Nc
c Nc cc
F1 gen phenotype: Normal 》 Cystic fibrosis
F1 gen genotype: NN, Nc, Nc 》 cc
ratio: 3 : 1
percentage: 75% 》 25%
(if you have anymore questions on the topic let me know)
Explain in terms of energy transfer and motion of molecules what happens to the WAX when the candle is blown out.A: When the candle was blown out the wax ________ because the molecules _________ energy and moved _________.
Answers
When a candle is lit, a combustion reaction takes place that releases heat, this heat causes the temperature of the candle to increase and the state of the candle to be liquid. Molecules move due to heat.
When the candle blown out, the temperature begins to decrease and the liquid wax begins to solidify because the molecules move slower and slower. Therefore, the spaces of the obtained can be filled in the following way:
When the candle was blown out the wax solidifies because the molecules have low energy and moved slower.
What do understanding isotopes explain on the periodic table 
Answers
How many electrons can be held in a sublevel l = 3?
Answers
Answer:
6 electrons max
Explanation:
The p sub level has three orbitals so can contain six electrons The d sub levels has five orbitals so can contain 10 electrons Max.
What is the compound name of this formula CuSO4 ?
Answers
Copper(II) sulfate.
Explanations:Before we name the given compound, we need to know what chemical compounds are. Chemical compounds are chemical substances composed of molecules formed from atoms of an element and held together by a chemical bond.
Given the chemical compound CuSO4, this compound contains copper, sulfur, and oxygen element.
The molecular compound CuSO4 is named with the first element first and then the second element by using the stem of the element name plus the suffix -ate
The compound name for CuSo4 will therefore be Copper(II) sulfate. The roman numeral of (II) comes from the sum of the oxidation state of the element.
Note that the oxygen atoms have a -2 oxidation number, and sulfur has a +6, oxidation number to have (4 * -2) + 6 = -2. This makes copper have an oxidation number of +2.
calculate how many grams are in 0.10 moles of OH ions
Answers
1.7 grams are there in 0.10 moles of OH ions.
The mole is a unit of measurement or the starting point for determining the concentration of a chemical in a sample. Avogadro's constant, or 1 mole, is a quantity that is equal to 6.022 × 10²³ particles. Any species, such as atoms, molecules, electrons, protons, neutrons, etc., can make up.
Number of moles = Mass/ Molecular mass
Given, number of moles = 0.10
Molecular mass of OH = 17 g/mol
∴ Mass = Number of moles × Molecular mass
Mass = 0.10 × 17
Mass = 1.7 grams
Therefore, 1.7 grams are there in 0.10 moles of OH ions.
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which of the following is the only list representing natural components of the atmosphere
Answers
The option containing Pollen, oxygen, carbon dioxide is the correct answer as it contains all the natural components, rest contains one or more synthetic or man made component.
Male gametes or the sperm cells are transported between the different plant reproductive sections by pollen which is a fascinating natural substance that is essential to plant reproduction.
The water is the primary component of all lifeforms, oxygen makes up the majority of the mass of all living things.
There are the numerous natural sources of atmospheric carbon dioxide, including outgassing from the ocean, decomposing vegetation and other biomass, venting volcanoes, naturally occurring wildfires, and even belches from ruminant animals. Photosynthesis is the process by which oxygen is continuously replenished in the Earth's atmosphere.
Pollen, oxygen and carbon dioxide all are natural component since they are form naturally in the environment.
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Your question is incomplete , for full question please refer below:
Which of the following is only list representing natural components of the atmosphere?
Dust, argon, smogPollen, oxygen, carbon dioxide Pollen, sulfuric acid, smogDust, oxygen, sulfuric acids