Answer:
For 1 mole of MgCl2, it would require 2 moles of KOH. ( 1 : 2 mole ratio)
Since you have 3 moles of KOH, it is in excess, and MgCl2 is the limiting reactant.
Beta particles will:
1. Not be affected by either pole of a magnet
2. Bend toward the North Pole of a magnet
3.bend toward the South Pole of a magnet
Answer:
3 ans
Explanation:
bend toward the south pole of a magnet
Is 4atm to big of a difference to get when I use the ideal gas law vs the van der waals equation?
This absolute amount of pressure does not play a significant difference.
At high temperatures and low pressures, its results deviate too little.
But at low temperatures and high pressures, it will change significantly and this difference will change from gas to gas.
In the image you can see the difference between some results from both equations.
Which of the following is an example of a velocity?
O A. 3 m/s south
O B. 2 km/hr
O C. 8 m/s
O D. 12 m/s2 east
Answer:
A
Explanation:
velocity is a vector quantity, it has single direction.
B and C are speed while D is acceleration
Please recheck, for this may not be the correct answer
Answer:
i think its A or C
Explanation:
The diagram represents the path of a ball that has been thrown upward. Discuss how the kinetic energy (KE), gravitational potential energy (GPE), and total mechanical energy (ME) change between points A (where the ball is thrown from), B (the highest point reached by the ball), and C (where the ball hits the ground). Ignore friction between the ball and the air. (3 points)
Answer:
Gravitational potential energy: [tex]GPE_{B}>GPE_{A}>GPE_{C}[/tex]
Kinetic energy: [tex]KE_{B}<KE_{A}<KE_{C}[/tex]
Total mechanical energy: [tex]ME_{A}=ME_{B}=ME_{C}[/tex]
Explanation:
The gravitational potential energy is directly proportional to height ([tex]GPE_{B}>GPE_{A}>GPE_{C}[/tex]). Since there are no non-conservative forces, the total mechanical energy is conserved ([tex]ME_{A}=ME_{B}=ME_{C}[/tex]) and the total mechanical energy is the sum of gravitational potential and kinetic energies. Then:
[tex]GPE_{A} + KE_{A} = GPE_{B} + KE_{B} = GPE_{C} + KE_{C}[/tex] (1)
If we know that [tex]GPE_{B}>GPE_{A}>GPE_{C}[/tex], then we conclude the following inequation for the kinetic energy:
[tex]KE_{B}<KE_{A}<KE_{C}[/tex] (2)
Are the activities exothermic or endothermic?
Answer:
The first 5 are exothermic reaction because heat is in product means heat is evolved or given out.
And last no reaction shows that heat is required so last reaction is endothermic reaction.
Explanation:
And heat is evolved in exothermic reaction and heat is absorbed in endo thermic reaction
Which event may occur when ocean salinity increases?
mass of water increases
freezing point of water increases
sunlight in deeper locations decreases
amount of dissolved gases in water increases
Answer:
The answer is C: “sunlight in deeper locations decreases”
Explanation:
The answer is C because the more salinity water has.. the harder it is to see and the harder it is for light to travel through the ocean.
Based on the given options, when ocean salinity increases, the amount of sunlight in deeper locations decreases due to increased turbidity.
What is ocean salinity?Ocean salinity refers to the amount of dissolved salts present in ocean water.
The salinity of the ocean increases in events such as volcanic eruptions due to the influx of minerals into the ocean.
When ocean salinity increases:
the amount of dissolved gases decreases the freezing point of water decreases the amount of sunlight in deeper locations decreases due to increased turbidityTherefore, when ocean salinity increases, the amount of sunlight in deeper locations decreases due to increased turbidity.
Learn more about ocean salinity at: https://brainly.com/question/14346963
Which of the following is one part of a chemical formula for a molecule?
A) A number that shows the total number of chemical bonds
B) Numbers that show how many atoms of each element are in the molecule
C) A number showing the atomic masses of each element
D) A Lewis dot diagram for the molecule
Using the models of the molecules below, (H2 and CH4) what does it mean for a molecule to be symmetrical?
Answer:
A molecule is symmetrical if it can be cut into two identical halves.
Explanation:
H2 can be written as H + H
CH4 is not a symmetrical molecule
Give some tips on how to take care of your microscope.
Answer:
dont get it wet or it wont work at all
When chemists convert ethene (C2H2) to ethanol (CH3CH2OH), they have a mixture of the two gaseous substances. Why do chemists then lower the temperature of the mixture?
Answer:
to collect liquid ethanol and leave ethene as a gas because ethanol has hydrogen bonds
Explanation:
The chemist would be lesser than the temperature of the mixture as to collect the liquid ethanol and then leave ethene as a gas since the ethanol is a bond that should be hydrogen. Also -OH that available in the ethanol would be responsible for the hydrogen bonds also it is the main and significant molecular forice
So as per the given situation the above represent the answer
Answer:
to collect liquid ethanol and leave ethene as a gas because ethanol has hydrogen bonds
Explanation:
How many liters of 3^He are present in 22 moles of gas?
How many grams are in 2.3 moles of O?
Answer:
36.8 g/mol of O
Explanation:
To find the number of grams, multiply the number of moles by the atomic mass of the element.
Oxygen has an atomic mass of 16.00.
2.3 moles O × (16.00 g O ÷ 1 mole) = 36.8 g/mol O
Hope that helps.
what is a unique characteristic of covalent bonding between nonmetal atoms
a) atoms give away electrons to reach a stable octet
b)atoms share valence electrons with neighboring atoms to reach a stable octect.
c)atoms gain electrons to reach a stable octet
d)delocalized electrons move freely among many positive atoms creating a ''sea'' of electrons
Answer:
The answer isssssssssssssss DRUM ROLL PLEASEEE
Explanation:
B
Considering the definition of covalent bonds, the correct answer is option b): atoms share valence electrons with neighboring atoms to reach a stable octect.
Covalent bonds are the forces that hold non-metallic atoms together. These atoms have many electrons at their outermost level (valence electrons) and have a tendency to gain electrons rather than give them up, to acquire the stability of the noble gas electronic structure. Therefore, non-metallic atoms cannot give electrons to each other to form ions.
In other words, a covalent bond is a force that joins two atoms of non-metallic elements to form a molecule. Atoms share pairs of electrons from their most superficial shell (called the valence shell) to achieve the stability of the molecule that has been formed with the bond and thus comply with the octet rule.
In summary, the correct answer is option b): atoms share valence electrons with neighboring atoms to reach a stable octect.
Learn more:
https://brainly.com/question/12661797?referrer=searchResultshttps://brainly.com/question/7591319?referrer=searchResults
Complete the graphic organizer.
Basic Parts of an Atom
Answer:
I'm not sure but I think the answer is electrons, protons and neutrons.
Cu(NO3)2 is what compound?
Answer:
the compound's name is copper nitrate
Thomson's plum pudding model of the atom was most directly replaced or refuted by
a. Rutherford's discovery that atoms contain a nucleus
b. Chadwick's discovery of the neutron
c. Goldstein's discovery of protons
d. Democritus's idea that the atom is indivisible
Answer:
A. Rutherford's discovery that atoms contain a nucleus
Explanation:
Answer:
A is the answer
Explanation:
what demonstrated Kinetic Energy
Kinetic Energy Statement
Kinetic energy is energy that a body possess as a result of its motion. Kinetic energy as it is mathematically written is the "classic statement" of: Kinetic energy is equal to half the mass of an object times its velocity squared.
There are five types of kinetic energy: radiant, thermal, sound, electrical and mechanical. Let us look at some of the kinetic energy examples and learn more about the different types of kinetic energy.
Hope this helped!
❤️
The magnifying power of a telescope is computed by dividing the focal length of its objective by _______.
Answer:
by focal length of the eyepiece.
Explanation:
hope it helps!!plz mark as brainleist.
4. When the mole fraction of solute is 1, there is
(a) a 1:1 ratio of solute to solvent.
(b) no solute present.
(c) only solute present.
(d) only solvent present.
(e) 1 mole of solute and 99 moles of solvent.
Answer:
(c) only solute present
Explanation:
In chemistry, the mole fraction, denoted by X, refers to the number of moles of a substance in a compound/mixture divided by the total number of substances in the same compound or mixture.
In this case, we can say that mole fraction represents the number of solutes to the number of solutes and solvent in the solution i.e. X = nA/nA + nB
Where; nA = number of solutes
nB = number of solvent
X = mole fraction.
Based on this analogy, When the mole fraction of solute is 1, there is only solute present. That is; X = 1 / 1 + 0
X = 1/1 = 1.
Calculate the percentage composition of Aluminum, Sulfur & Oxygen in the compound of Al(SO4)3
Answer:
Percentage of O = 56.1 %
Percentage of Al =15.8%
Percentage of S = 28.1 %
Explanation:
Given compound Al₂(SO₄)₃
Molar mass of compound:
27×2 + 32×3 + 16×12 = 342 g/mol
Percentage of Al = ( Mass of Al / Total mass ) × 100
Percentage of Al = 54 /342 × 100
Percentage of Al =15.8%
Percentage of S = ( Mass of S / Total mass ) × 100
Percentage of S = 96 /342 × 100
Percentage of S = 28.1 %
Percentage of O = ( Mass of O / Total mass ) × 100
Percentage of O = 192 /342 × 100
Percentage of O = 56.1 %
Which are reasons to create a study schedule? Check all that apply.
to prevent scheduling conflicts
to help meet deadlines
to study more efficiently when tired
to maintain a consistent schedule
to set aside enough time for studying
Mark this and return
Answer - A, B, D, E
to prevent scheduling conflicts
to help meet deadlines
to maintain a consistent schedule
how many mercury atoms are contained in 0.37 moles of mercury?
What is the final temperature of the metal?
What is the temperature of the water?
What is the temperature change of the metal?
Answer: 29.8
Explanation:
Which of the following is NOT a compound?
Table salt
Carbon dioxide
Water
Gold
Answer: Gold.
Explanation: Water, CO2, and table salt are compounds. They are composed of two or more separate elements; a mixture, where as gold is neither.
A student measures 10 g of baking soda and mixes it with 5 grams of vinegar. The mixture begins to bubble and fizz and feels cold to the touch. Once the reaction is over the student weighs the solution and discovers that the resulting mixture weighs only 12g. What happened to the missing 3 grams of product? Use the Law of Conservation of Matter in your answer.
Answer:
Some of the product is a gas that goes to the atmosphere.
Explanation:
Based on the chemical reaction of baking soda (Sodium bicarbonate: NaHCO₃) with vinegar (Acetic acid: CH₃COOH):
NaHCO₃(aq) + CH₃COOH(aq) → H₂O(aq) + CO₂(g) + CH₃COONa(aq)
When the reaction occurs, one of the products (CO₂) is a gas that will disappear of the mixture to stay in the atmosphere. That is the reason why there are missing 3 grams.
What is the cation and anion for Aluminum chloride
Answer:
For, Aluminum chloride, aluminum = AL+ so here aluminum is the cation
But Chloride is the anion = CL -
So cation is positive and anion is negative
according to the Aufbau principle, which principle energy level would have higher energy, n=2 or n=5?
Answer:b
Explanation:
A container with a volume of 893L contains how may moles of air at STP?
Answer:
i think 54
Explanation:
In the container with a volume of 893 liters, there are 39.9 moles of air at STP conditions.
We can find the number of moles with the Ideal gas law equation:
[tex] PV = nRT [/tex]
Where:
P: is the pressure = 1 atm (STP)
V: is the volume = 893 L
n: is the number of moles =?
R: is the gas constant = 0.082 L*atm/(K*mol)
T: is the temperature = 273 K
Hence, the number of moles is:
[tex] n = \frac{PV}{RT} = \frac{1 atm*893 L}{0.082 L*atm/(K*mol)*273 K} = 39.9 moles [/tex]
Therefore, there are 39.9 moles in the container.
You can find more about Ideal gas law here: https://brainly.com/question/4147359?referrer=searchResults
I hope it helps you!
Please help me this is my science final
Answer:
1.Winter
2.Autmn
3.Summer
4.Spring
I hope this helps!
If the [H+] of a solution is 6.8 x 10-9 mol/L the pH is
Answer:
8.2
Explanation:
To solve this problem;
The concentration of [H⁺] = 6.8 x 10⁻⁹mol/L
So, we need to convert this to pH:
pH = -log [H⁺]
So;
pH = -log 6.8 x 10⁻⁹ = 8.2