Answer:
2O is an atom while O2 Is a molecule
Why is it easier to remove an electron from potassium than sodium?
The value of resistance r was determined by measuring current I flowing through the resistance with an error
Correct question is;
Resistance of a given wire is obtained by measuring the current flowing in it and the voltage difference applied across it. If the percentage errors in the measurement of the current and the voltage difference are 3% each, then error in the value of resistance of the wire is?
Answer:
6%
Explanation:
From ohms law, we know that;
R = V/I
Where;
R is resistance
V is voltage
I is current
Now, the percentage error in the resistance is given by the formula;
ΔR/R = ΔV/V+ ΔI/I
We are told that the current and the voltage difference have a percentage error of 3% each. Thus;
ΔR/R = 3% + 3% = 6%
A small amount of liquid bromine is added to a container which is then sealed.
Br2 (l) " Br2 (g)
Could anyone just suggest questions to practice using Faraday's Law?
Answer:
just to get points
Explanation:
I gotta pick 4 last question to pass :,) pls help:>
whoever answers first will be marked brainliest unu
Answer:
Explanation:
heat up the solvent
increse the pressurre of the mixture
add more solute
agitate
how can you predict if a bond will be ionic or covalent by using the periodic table
Answer: There is a couple different ways to determine if a bond is ionic or covalent. By definition, an ionic bond is between a metal and a nonmetal, and a covalent bond is between 2 nonmetals. So you usually just look at the periodic table and determine whether your compound is made of a metal/nonmetal or is just 2 nonmetals.
what is chemical composition of the atmosphere
Answer:
nitrogen 78%, Oxygen 21%, Argon 0.9%, Carbon dioxide 0.03%, water 0-4%(depends)
Explanation:
Answer:
definition: The atmosphere is composed of a mix of several different gases in differing amounts. The permanent gases whose percentages do not change from day to day are nitrogen, oxygen and argon. Nitrogen accounts for 78% of the atmosphere, oxygen 21% and argon 0.9%.
Explanation:
Nitrogen accounts for 78% of the atmosphere, oxygen 21% and argon 0.9%. Gases like carbon dioxide, nitrous oxides, methane, and ozone are trace gases that account for about a tenth of one percent of the atmosphere.
Layers of the atmosphere:
- From lowest to highest, the major layers are the troposphere, stratosphere, mesosphere, thermosphere and exosphere
100 POINTS +BRAINLIEST PLZ ANSWER ASAP
Eduardo looks at stars through his telescope. He says that the star Sirius is brighter than the star Rigel. In reality, Rigel has a greater absolute brightness than Sirius. What can explain Eduardo's observation?
A. Sirius is much closer to Earth than Rigel
B. Rigel is much closer to Earth than Sirius
C. Sirius is a hotter star than Rigel.
D. Rigel is a hotter star than Sirius,p
Answer:
answer is A. Sirus is much closer to Earth than Rigel.
Answer:
A
Explanation:
word equations- Please help ASAP
Answer:
See answer below
Explanation:
In this case, you just need to use any acid you want (Like HCl, or H₂SO₄) to do this exercise.
You are given a sample of what you have to do which is:
Acid + metal ------> Salt + hydrogen
As you can see, an acid like the ones I wrote above, have hydrogen atoms, so you should put the hydrogen there. As for the part of salt, you just need to draw the corresponding salt that is formed when the acid reacts with the metal, and write it's name.
Let's do all three equations for you to a better understanding. For all the given examples, I will use HCl as acid, and i will explain one reaction cause the other two reactions happens the same thing, only with a different metal.
1. 2HCl + Zn ------> ZnCl₂ + H₂
As you can see, we just have a displacement reaction where the metal displaces the position of the hydrogen to form the salt and the hydrogen leaves the molecule as a gaseous molecule. Written in words it would be:
Hydrochloric acid + Zinc ----> Zinc chloride + hydrogen
2. 2HCl + Pb -------> PbCl₂ + H₂
Hydrochloric acid + lead ------> Lead (II) chloride + hydrogen
3. 2HCl + Fe -------> FeCl₂ + H₂
Hydrochloric acid + iron ------> Iron (II) chloride + hydrogen
Hope this helps
Explain how the use of fossil fuels can cause lakes and ponds to become more acidic.
Answer:
Explained below
Explanation:
Fossil fuels which are made up of coal and oil when burnt by power-production industries, make sulfur to be released into the atmosphere where it combines with oxygen to form SO2 (sulfur Dioxide). Now, the exhausts possessed by cars could also cause the formation of nitrogen oxides in the atmosphere. Therefore, H2SO4 which is airborne sulfuric acid and HNO3 which is nitric acid can be formed and when dissolved in the water vapor in the atmosphere form what is called acid rain.
Now, as acid rain flows through the soil, it can leach aluminum from the soil clay particles and then flow into the lakes to make them more acidic.
Graham's law states that, the rate by which a gas effuses is __________ to the square root of the molar mass of that gas
A) not related
B) directly proportional
C) inversely proportional
D) a multiple
Describe the three steps involved in producing crystals of the salt copper sulfate.
Answer:
Add copper (II) oxide (insoluble base), a little at a time to the warm dilute sulfuric acid and stir until the copper (II) oxide is in excess (stops disappearing) Filter the mixture into an evaporating basin to remove the excess copper (II) oxide. Leave the filtrate in a warm place to dry and crystallize.
The three main steps involved in producing crystals of the salt copper sulfate is listed below.
What is the process of making Soluble Salts ?
Soluble salts can be made by reacting acids with soluble or insoluble reactants.
Titration method is used if the reactants are soluble
Insoluble salts are made by precipitation reactions.
For producing crystals of the salt Copper Sulfate from copper oxide following three steps needs to be done ,
1. Copper oxide is added continuously with a spatula to the Water Bath heated Sulfuric Acid , until it gets in excess.
2. The mixture is filtered to remove extra Copper Oxide, and then pour the filtrate (Copper sulfate solution) into an evaporating basin , where it is heated to evaporate half of the water .
3. The solution is poured into a watch glass so that all the water evaporates.
Hence we are left with blue and regularly shaped Hydrated copper sulfate crystals .
To know more about Soluble Salts
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What is an isotope and how are they formed?
Answer:
Long story short, isotopes are simply atoms with more neutrons — they were either formed that way, enriched with neutrons sometime during their life, or are originated from nuclear processes that alter atomic nuclei. So, they form like all other atoms.
Explanation:
what would be the ph of an aqueous solution of sulphuric acid which is 5×10^_5 mol l^_1 in concentration
Answer:
the ph of an aqueous solution of sulphuric acid which is 5*10^5 mol in concentration is basic in nature
hiiii everyone my previous account has been deleted who knows me plz follow
Answer:
okie!
Explanation:
Answer:
ok i. d k u but thnaks for points ill follow u anyways lol
Explanation:
Jazz and Pam went to Six Flags over Texas. They had fun riding the rides at the
amusement park. Their favorite ride was the Road Runner Express roller coaster. It
made so many turns, and it was going up hills and down hills really fast. Their inertia
was always changing throughout the ride. Once the roller coaster came to a stop they
moved forward into their seatbelt. This is an example of which Newton's Law?
Answer:
newtons first law
Explanation:
an object in motion will stay in motion unless acted upon by an outside force
if the Gulf Stream is warm and the air in Europe is cold, what kind of energy transfer will happen between the water and the air?
Answer:
If it weren't for the warm water of the Gulf Stream, England would have a much colder climate
Explanation:
Answer:
If it weren't for the warm water of the Gulf Stream, England would have a much colder climate
Explanation: hope it helps ^w^
Alex rode his bike from school to home and measured the distance to be 400 meters.
It only took him 10 minutes to get home. What is his average speed in meters per
minute?
O
40m/min
O
.0250m/min
.667m/min
O
240,000m/min
Answer: 40 meters per minute
Explanation:
If the total length was 400 meters and it took him 10 minutes, divide 400 by 10 and boom there you go
Answer:
40 m/min
Explanation: why? because I did that before and it was right so I am sure about the answer and all to do is to divide 400 meter and 10 minutes
which you will get 40
400:10 = 40
How many atoms are in 4.25 g of Ag?
Group of answer choices
2.76 x 10^26 atoms
2.37 x 10^23 atoms
2.76 x 10^23 atoms
2.37 x 10^22 atoms
You enter a crime scene and discover one, single blood drop. You immediately measure the drop and calculate it’s Impact Angle. However, you will not be able to determine the Point of Origin of this single blood drop. Why can’t you determine the Point of Origin from a single blood drop?
Answer:
You cannot determine the point of the origin of a single blood drop because it is just a single drop.
When a drop of blood splatters over the ground drag and trail occurs on it which could be useful when there are a lot of it and you can measure the distance from the origin but in case of a single drop it cannot help you because of one main reson which is distance.
You only CAN measure the direction but not the distance of the one single drop.
Let's take a scenario for a example.
A murderer approaches it's target from behind and grope it's target and stabbed him from front.
You will notice that the blood splatter does not occur in a straight direction but it spreads in kind of in a semicircle.
(THIS IS JUST AN EXAMPLE OF A SCENARIO. there are many other cases but this just an example to make the concept clear)
Hope this answer helped
please help! Doesn't need to be super long maybe 1-2 sentences for each please! (30 points)
Why do you believe knowing how elements and compounds react together is essential in everyday matters?
Some elements are more "reactive" than other elements; why do you think this is?
Answer:
it is very important to know how elements and compounds react together because everything that surrounds us is made out of elements and compounds. Therefore, understanding how these work can allow us to have a better understanding of the world that surrounds us. Moreover, it can avoid accidents when we deal with dangerous compounds, such as when we cook or clean.
Explanation:
Riddle
Why did the rock collector like his
collection of metamorphic rocks so much?
Answer:
Because they would keep changing? Or Because they were the hottest?
Select all the correct answers.
Which statements correctly match a chemical name with its formula? Use the list of polyatomic ions and the periodic table to help you answer.
The chemical formula for ammonium carbonate is NH4HCO3.
The chemical formula for ammonium hypochlorite is NH4ClO.
The chemical formula for ammonium nitrate is NH4NO3.
The chemical formula for ammonium phosphate is NH4(PO4)3.
The chemical formula for ammonium sulfate is (NH4)2SO3.
Answer:
The correct answers are C. Ammonium nitrate - NH4ClO and D. Ammonium phosphate - NH4(PO4)3
Explanation:
what is haemoglobin? Name its function.
Answer:
Haemoglobin is the red pigment which is present in our blood and helps in transporting oxygen to different parts of our body.
Hope it helps
Answer:
Haemeglobin is a red substance that has the function of transporting oxygen into the blood.
Explanation:
The microscope has the power to show details of
an object more clearly. This is known as
Answer:
Explanation:
in order for the user to clearly view an image, the microscope must carry out two processes. ... the ability of the microscope to increase the size of the image of an object is called______. magnification. the microscope has the power to show details of an object more clearly.
The power of a microscope to show details of an object more clearly is: resolution.
A microscope can be defined as an optical device which is typically designed and developed to make an enlarged (magnified) image of a minute (very small) object, in order to show all the littlest or tiniest details (information) about the object that cannot be seen by the natural human eye.
Generally, the different types of microscopes include:
Inverted microscope.Compound light microscope.Scanning electron microscope.Polarizing microscope.In Science, the resolution of a microscope is a measure of its power to clearly show the details of an object.
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the bus will stop here into question tag
Answer:
the bus will stop here, wouldn't it?
How does the concentration of ions in a strong base differ from a weak base?
1 full sentence answer. TY!
Answer:
Strong acids ionize completely in aqueous solutions while weak acids release a few ions in aqueous solutions.
pls help i have to pick 3 T-T
Answer:
Explanation:
elemant
compound
mixture
I NEED HELP PLZ HELP
Answer:
A
Explanation:
A solution of benzene is prepared by dissolving 0.32 mg of benzene to volume of 100 dm3 calculat molarity
Answer:
4.10 x 10⁻⁸ M
Explanation:
The molarity (M) of a solution is defined as the number of moles of solute per liter of solution. We have to first calculate the number of moles of solute (benzene) from the mass and the molecular weight:
Benzene has the chemical formula C₆H₆. So, its molecular weight (MW) is calculated from the molar mass of C (12 g/mol) and H (1 g/mol):
MW(C₆H₆)= (12 g/mol x 6 C) + (1 g/mol x 6 H) = 78 g/mol
Then we convert the mass of benzene (0.32 mg) from mg to grams and divide the mass into the MW:
mass = 0.32 mg x 1 g/1000 mg = 3.2 x 10⁻⁴ g
moles of benzene = mass/MW = 3.2 x 10⁻⁴ g/(78 g/mol) = 4.10 x 10⁻⁶ mol
Now, we convert the volume of solution from dm³ to L:
liters of solution = 100 dm³ x 1 L/1 dm³ = 100 L
Finally, we divide the moles of benzene into the volume of solution in liters:
M = moles of benzene/liters of solution = 4.10 x 10⁻⁶ mol/100 L = 4.10 x 10⁻⁸ mol/L = 4.10 x 10⁻⁸ M