Answer:
Atoms form chemical bonds with other atoms when there's an electrostatic attraction between them. This attraction results from the properties and characteristics of the atoms' outermost electrons, which are known as valence electrons.
conclusion about filter press
Answer: A filter press is an efficient and economical machine for liquid/solid separation. ... The Slury – in a filter press operation the slurry is pumped into the chamber and against the filter media. The Filtrate – the liquid passes through the filter cloth and exits via the filter plate's filtrate ports.
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The table below shows the average seasonal relative humidity during the summer in four locations:
Relative Humidity
Location Average Seasonal Relative Humidity (%)
A
76
81
с
60
D
98
B
Which location is most likely to experience frequent summertime storms? (3 points)
Location A
Ob
Location B
Oc
Location C
Od
Location D
Answer:
C
Explanation:
It’s the lowest to create storms
A student is conducting an experiment to see which material, when placed in a closed circuit, will still allow a light bulb to light up. With which material would the student have success?
A.sulfur
B.copper
C.glass
D.wood
The student would have success in experiment with using copper in a closed circuit as it allows conduction and is a good conductor of electricity.
What is conduction?Conduction is defined as a process as a means of which heat is transferred from the hotter end of the body to it's cooler end.Heat flows spontaneously from a body which is hot to a body which is cold.
In the process of conduction,heat flow is within the body and through itself.In solids the conduction of heat is due to the vibrations and collisions of molecules while in liquids and gases it is due to the random motion of the molecules .
When conduction takes place, heat is usually transferred from one molecule to another as they are in direct contact with each other.There are 2 types of conduction:1) steady state conduction 2) transient conduction.According to the type of energy conduction is of three types:
1) heat conduction
2) electrical conduction
3)sound conduction
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A mixture of 80.0 g of oxygen and 80.0 g of helium has a total
pressure of 0.1800 atm. What is the partial pressure of each gas?
Answer:
Partial pressure of O₂ = 0.0198 atm
Partial pressure of He = 0.1584 atm
Explanation:
Given data:
Mass of oxygen = 80.0 g
Mass of helium = 80.0 g
Total pressure = 0.1800 atm
Partial pressure of each gas = ?
Solution:
First of all we will calculate the number of moles.
Number of moles of oxygen:
Number of moles = mass/molar mass
Number of moles = 80.0 g/ 32 g/mol
Number of moles = 2.5 mol
Number of moles of helium:
Number of moles = mass/molar mass
Number of moles = 80.0 g/ 4 g/mol
Number of moles = 20 mol
Total number of moles = 20 mol + 2.5 mol = 22.5 mol
Mole fraction of O₂ = 2.5 mol/ 22.5 mol = 0.11
Mole fraction of He = 20 mol / 22.5 mol = 0.88
Partial pressure:
Partial pressure of O₂ = 0.11× 0.1800 atm = 0.0198 atm
Partial pressure of He = 0.88 × 0.1800 atm = 0.1584 atm
PLEAS HELP ASAP WILL MARK BRAINLIST
Answer:
Carbon
Explanation:
7) If the mass of an object is 20 g and its volume is 25 L. What is the density of this object? 1 8) What is the difference between accuracy and precision? Copy and paste a picture of something that accurate but not precise and also something that is precise, but not accurate. 9) What is the formula for percent error?
this is due under 30 mins, please help
Answer:
Accuracy is the closeness of a measured value to the accepted or exact value. The precision of a tool is the smallest unit of measure the tool provides. The smaller the units a tool can measure, the more precise the tool. A measurement can be precise and not be accurate.
Explanation:
Pls Help! 100 Points!!!!!
Which of the following correctly compares the radii of F and F−?
A) F has a smaller radius than F− because an additional electron causes greater repulsion in F−.
B) F has a larger radius than F− because an additional electron causes greater repulsion in F.
C) F has a smaller radius than F− because F− has an additional energy shell.
D) F has a larger radius than F− because F has an additional energy shell.
F has a smaller radius than F− because F− has an additional energy shell correctly compares the radii of F and F−. The correct option is C.
Thus, Compared to oxygen, fluorine is a stronger electronegative element. The outermost electrons of fluorine are gripped by the nucleus more tightly than oxygen because fluorine has a high electronegativity.
It takes more energy to remove the outermost electron of fluorine than it does to remove the outermost electron of oxygen. Fluorine has a higher ionization energy than oxygen as a result.
An atom's energy is determined by how much energy it gains or loses as a result of chemical processes that result in electron loss or gain. Exothermic reactions are those in which energy is released, and endothermic reactions are those in which energy is absorbed.
Exothermic reactions produce negative energy, which is why energy is given a negative sign.
Thus, F has a smaller radius than F− because F− has an additional energy shell correctly compares the radii of F and F−. The correct option is C.
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Please help I need a answer to both
Hi , I’m really sorry because I just have the first question... so here it is :
So it is 0.52 mol .
Have a nice day .
Solid nickel reacts with aqueous lead (II) nitrate to form solid lead. What is the net ionic equation for this reaction? • Hint: In this reaction, nickel exhibits its most common oxidation state of +2. • Be sure to include the charge for each ion in the net ionic equation. Provide your answer below: (s) + (aq) → *(n)
Answer:
Pb²⁺(aq) --> Ni²⁺(aq)
Explanation:
The equation of the reaction is given as;
Ni(s) + Pb(NO₃)₂(aq) --> Pb(s) + Ni(NO₃)₂(aq)
In writing the ionic equation, we break the aqueous compound into ions. The solid and liquid compounds are ignored.
We have;
Pb²⁺(aq) + NO₃²⁻(aq) --> Ni²⁺(aq) + NO₃²⁻(aq)
Canceling the spectator ions;
Pb²⁺(aq) --> Ni²⁺(aq)
Answer:
Ni(s)+Pb2+(aq)→Ni2+(aq)+Pb(s)
Explanation:
The complete ionic equation of this reaction is
Ni(s)+Pb2+(aq)+2 NO−3(aq)→Ni2+(aq)+2 NO−3(aq)+Pb(s)
The nitrate ions are spectator ions and can be removed from the equation, giving us
Ni(s)+Pb2+(aq)→Ni2+(aq)+Pb(s)
Which of the following elements will lose electrons to form an
ion? Check all that apply.
Р
Fe
Pb
Se
Elements that will loose electron as so that ion can be formed are; Fe and Pb.
Fe ( iron ) and Pb ( Lead) are both metals and metals will always loose electron so that they can turn to postively charged ion, and this ion is regarded as Cation.Phosphorus (P) is a non- metal, it will only gain electron and turn to a negatively charged ions, this ion is regarded as Anion.Therefore, Metals usually lose electron while non- metals accept the electron.
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Which of the following statements about atomic mass is true? (help asap)
A. It represents the number of protons
B. It is the relative amount of mass of the element
C. It is the whole number used to numerically order the elements
D. It equals the number of electrons when the element is a neutral atom
Answer:
B
Explanation:
Because the atomic mass is the mass of a single atom of a chemical elements
How many atoms is 59.6 Liters of He gas at STP?
A cyclist traveled 2 miles in 10 minutes. What is the average speed of the cyclist?
Group of answer choices
Answer:
about 6 min
Explanation:
PLEASE HELP!! I WILL MARK THE 1st ONE BRAINLIEST!
Answer:
2 3 and 6
Explanation:
which of the elements below has a smaller atomic radius. element1: 1s2 2s2 2p4 element2: 1s2 2s2 2p5
Answer:
both are same give different number
Which method of heat transfer allows you to fry an egg in a frying pan on the stove?
Answer:
Conduction
Explanation:
Answer:
Conduction is correct
Explanation:
Unsanitary meat processing, poisonous additives, and false claims about the efficacy of drugs (i.e., "snake oil") resulted in the original Food
and Drugs Act and Meat Inspection Act in 1906.
True or False
10 The rate of the reaction between hemoglobin (Hb)
and carbon monoxide (CO) was studied at 20°C.
The following data were collected with all
concentration units in u mol/L. (A hemoglobin
concentration of 2.21 u mol/L is equal to
2.21 x 10 mol/L.)
[Hblo [CO),
Initial Rate
(u mol/L) (u mol/L) (u mol/Ls)
2.21
1.00
0.619
4.42
1.00
1.24
4.42
3.00
3.71
(a) Determine the orders of this reaction with
respect to Hb and CO.
(b) Determine the rate law.
(c) Calculate the value of the rate constant.
(d) What would be the initial rate for an
experiment with [Hb]o =3.36 u mol/L
[CO] =2.40 4 mol/L?
Answer:cookie
Explanation:
The following image represents the movement of a tsunami, a giant wave produced by an earthquake at sea. Which type of model is represented in this image?
A: Computer simulation
B: Graph
C: Map
D: Small-scale object
Answer:
A
Explanation:
It is not c or b, D is not applicable so it must be A
An ice cube melts in the hot sun. Is this exothermic or endothermic and
why?
Answer:
Endothermic
Explanation:
In order to melt the ice cube, heat is required, so the process is endothermic. Endothermic reaction In an endothermic reaction, the products are higher in energy than the reactants. Therefore, the change in enthalpy is positive, and heat is absorbed from the surroundings by the reaction.
What type of compound is disulfur dichloride?
a. organic compound
b. acid (ionic compound)
c. covalent compound
d. ionic compound
Answer:
Covalent compound
Explanation:
It is formed by covalent bonds, in which the atoms share a pair of valence electrons
Unless otherwise instructed, you may use the periodic table in the Chemistry: Problems and Solutions book for this question.
Which explanation accounts for why carbon monoxide is not a polar molecule?
The electronegativity differences between carbon and oxygen are not very large.
Carbon and oxygen do not form ions.
Carbon is a metal, and oxygen is a nonmetal.
There are no hydrogen atoms in the molecule.
Answer:
The electronegativity differences between carbon and oxygen are not very large.
Explanation:
Between the atoms of carbon monoxide exists a covalent bond which attaches the carbon to the oxygen.
In this type of bonding, both atoms shares a given number of valence electrons to attain chemical stability.
A substance is polar when there is a distinct charge separation between the species.
For covalent bonds, the electronegativity difference plays in important role in determining the polarity of the compound. When the difference is large, the compound will be polar but when the difference is very small or zero, no polarity will exist.
In between carbon and oxygen of carbon monoxide, the electronegativity difference is very low.
4. A scientific theory is
1. a well-tested explanation for a widely accepted hypothesis
2. a well-tested explanation for a broad set of observations
3. a proven explanation for the results of multiple experiments
4. a hypothesis that has stood the test of time
Answer:
Option 1
Explanation:
Peptides can be separated using an ion‑exchange column based on their isoelectric (pI) values. At which pH values would two different peptides, one with a pI of 5.3 and the other with a pI of 8.5 , bind to a cation‑ and anion‑exchange column? Each peptide may be capable of binding to each column at more than one pH value.
Answer:
At pH 3.5:
Peptide A with pI 5.1 and peptide B with pI 8.5 will both bind to the anion-exchange column.
At pH 6.5:
Peptide A with pI 5.1 will bind to the cation-exchange column, while peptide B with pI 8.5 will bind to the anion-exchange column.
At pH 10.8:
Peptide A with pI 5.1 and peptide B with pI 8.5 will both bind to the cation-exchange column.
Explanation:
Ion-exchange column chromatography is used for separating proteins and other molecules in a solution based on differences in net charge. Negatively charged molecules bind to positively charged solid supports called the anion-exchange column, whereas, positively charged molecules bind to negatively charged solid supports known as cation-exchange column.
A peptide can acquire a net charge if the pH of the medium is either above or below its isoelectric point,pI. At pH above pI, the peptide acquires a net negative charge and can bind to a positive support. At pH above pI, the peptide acquires a net positive charge and can bind to a negative support. The greater the difference between pH and pI, the tighter the peptide will bind to the column.
At pH 3.5:
Peptide A with pI 5.1 and peptide B with pI 8.5 will both bind to the anion-exchange column.
At pH 6.5:
Peptide A with pI 5.1 will bind to the cation-exchange column, while peptide B with pI 8.5 will bind to the anion-exchange column.
At pH 10.8:
Peptide A with pI 5.1 and peptide B with pI 8.5 will both bind to the cation-exchange column.
how many grams of diazine (N2H2) are there in 2.55 mol of the compound
Answer:
76.5g is present in 2.55mol of diazine
Explanation:
no. of mole equals mass over molar mass
molar mass of diazine equals 30g/mol.. then substitute to get the mass in grams which is 76.5g
10. What mass of methane gas (C2H6) is 6.10 x 1024 molecules?
Answer:
10 to the 24 power
Explanation:
Question 1 of 7
Which sentence correctly explains the change that occurs when ice melts?
Ice melting is a physical change, and the state of the substance remains the same.
Ice melting is a physical change, and the mass of the substance remains the same.
оо оо
Ice melting is a chemical change, and the state of the substance remains the same.
Ice melting is a chemical change, and the mass of the substance remains the same.
Answer:
Explanation:B ice melting is a phiyscal change and the mass of the substance remains the same
Answer:
b
Explanation:
As a sample's temperature increases, which two factors also increase?
A. Particle speed
O.B. Particle boiling point
C. Particle kinetic energy
D. Particle size
Help please
Answer:
speed
energy
Answer:
particle speed and particle energy
Explanation:
i just took the quiz on a p e x
I need the answer to this multiple-choice
which of these is a cost of using paper grocery bags
Answer:
15 cents where im from
Explanation: