Answer:
3.47 mol MnSO4
Explanation:
54.94 + 32.07 + (16 × 4) = 151.01g/mol MnSO4
542.32g / 151.01g/mol = 3.47 mol MnSO4
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equation of bhr and h2o
50 POINTS!
What do you expect to happen to the reaction rate when the size of a solid reactant is changed describe increased in size or solid reactant effect on rate/decrease in size of solid react in a second on rate
Answer:
sorun nedir anlamıyorum seni türkçe yaz
is this reaction oxidation or reduction
CH2=CH2 + OsO4 yields to HOCH2CH2OH
Answer:
it's definitely a oxidation reaction because here the oxygen contained OH group present in yeild
3) Two atoms have identical electron configurations. Which statement about the atoms
is true?
a) They have the same chemical properties.
b) They must have the same mass.
c) They must have the same number of neutrons.
d) They could be atoms of different elements in the same group.
what are greenhouse effect 1 paragraph and come friends
pls hurry
Answer:
The greenhouse effect is a natural process that warms the Earth's surface. When the Sun's energy reaches the Earth's atmosphere, some of it is reflected back to space and the rest is absorbed and re-radiated by greenhouse gases.
Explanation:
Greenhouse gases are certain gases in the atmosphere (water vapor, carbon dioxide, nitrous oxide, and methane, for example) that trap energy from the sun. Without these gases, heat would escape back into space and Earth's average temperature would be about 60º F colder.
the warming of the Earth's atmosphere that is caused by air pollution. Note: The greenhouse effect occurs when warmth from the sun is trapped in the Earth's atmosphere by a layer of gases (such as carbon dioxide) and water vapor.
Find the mass of 3.89 mol of NaF
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help me if your good at science
Answer:
B.
Explanation:
I had this same question today and got it right
Answer:
Genetic variability of offspring
Explanation:
Basically the sorting of genes
Need help on thissss
Answer:37
Explanation:
Because mass number is proton number + neutron number
Which is a NOT a freshwater source on Earth?
A. The ocean
B. The atmosphere
C. Surface water
D. Groundwater
Answer:
B the atmosphere it's not on earth and I'm pretty sure the atmosphere doesn't have water in
Explanation:
1. What is the correct order of the water cycle?
A cloud, water vapor, rain,
B rain, cloud, water vapor
C water vapor, cloud, rain
D water vapor, rain, cloud
what mass of potassium sulfate is needed to make 2500.0ml of 2.0m solution?
(ANSWER THIS AND SHOW THE WORRRKKKKK, AND EXPLAINNN IT) THIS ISSS 60 POIUNTS PLZZ TAKE IT SERIOSLY
Molarity
Chemists primarily need the concentration of solutions to be expressed in a way that accounts for the number of particles that react according to a particular chemical equation. Since percentage measurements are based on either mass or volume, they are generally not useful for chemical reactions. A concentration unit based on moles is preferable. The molarity (M) of a solution is the number of moles of solute dissolved in one liter of solution. To calculate the molarity of a solution, you divide the moles of solute by the volume of the solution expressed in liters.
Note that the volume is in liters of solution and not liters of solvent. When a molarity is reported, the unit is the symbol M and is read as “molar”. For example a solution labeled as 1.5 M NH 3 is read as “1.5 molar ammonia solution”.
Sample Problem: Calculating Molarity
A solution is prepared by dissolving 42.23 g of NH 4 Cl into enough water to make 500.0 mL of solution. Calculate its molarity.
Step 1: List the known quantities and plan the problem.
& underline{text{Known}} &&underline{text{Unknown}} \& text{mass}=42.23 text{g} NH_4Cl && text{molarity}= ? text{ M}\& text{molar mass} NH_4Cl=53.50 text{g} / text{mol} \& text{volume solution}=500.0 text{mL}=0.5000 text{L}
The mass of the ammonium chloride is first converted to moles. Then the molarity is calculated by dividing by liters. Note the given volume has been converted to liters.
Step 2: Solve.
42.23 text{ g } NH_4Cl times frac{1 text{ mol } NH_4Cl}{53.50 text{ g } NH_4Cl} &= 0.7893 text{ mol } NH_4Cl\frac{0.7893 text{ mol } NH_4Cl}{0.5000 text{ L}} &= 1.579 text{ M}
Step 3: Think about your result.
The molarity is 1.579 M, meaning that a liter of the solution would contain 1.579 mol NH 4 Cl. Four significant figures are appropriate.
In a laboratory situation, a chemist must frequently prepare a given volume of solutions of a known molarity. The task is to calculate the mass of the solute that is necessary. The molarity equation can be rearranged to solve for moles, which can then be converted to grams. See sample problem 16.3.
Sample Problem:
A chemist needs to prepare 3.00 L of a 0.250 M solution of potassium permanganate (KMnO 4 ). What mass of KMnO 4 does she need to make the solution?
Step 1: List the known quantities and plan the problem.
Known
molarity = 0.250 M
volume = 3.00 L
molar mass KMnO 4 = 158.04 g/mol
Unknown
mass KMnO 4 = ? g
Moles of solute is calculated by multiplying molarity by liters. Then, moles is converted to grams.
Step 2: Solve.
text{mol KMnO}_4 = 0.250 text{ M KMnO}_4 times 3.00 text{ L} &= 0.750 text{ mol KMnO}_4\0.750 text{ mol KMnO}_4 times frac{158.04 text{ g KMnO}_4}{1 text{ mol KMnO}_4} &=119 text{ g KMnO}_4
Step 3: Think about your result.
When 119 g of potassium permanganate is dissolved into water to make 3.00 L of solution, the molarity is 0.250 M.
First person with the right answer gets brainliest thanks (btw the numbers on the right are the answers choose the right one)
Answer:
there isnt anything
Explanation:
Extra points please someone help
Answer: Plants and animals share many characteristics, but they are different in some respects hope that helps-
Explanation:
Shown in the table below are solubility data for different salts in water at 60oC.
Which salt is most soluble at 60o C?
A, B, C, or D.
(Chart Below:)
Answer:
D is the most soluble in water at 60 degrees Celsius
According to the data given in the table, the salt is most soluble at 60o C - salt D.
In the given table it is given that all the salts are soluble in different concentrations in different concentrations of the water at the same temperature of 60 degrees celsius.
Salt A - 10/ 50 grams H₂OSalt B - 20/60 grams H₂OSalt C - 30/120 grams H₂OSalt D - 40/120 grams H₂OConverting them in the same amount of H₂O that is 100 grams in the same ratio:
Salt A - 10/ 50 = x/100 gram = 20 gram/ 100 gram H₂OSalt B - 20/60 = x/100 grams = 33.3 gram/ 100 gram H₂OSalt C - 30/120 = x/100 grams = 25 gram/ 100 gram H₂OSalt D - 40/120 = x/100 grams = 50 gram/ 100 gram H₂OThus, the salt D is the most soluble that is 50 grams per 100 gram H₂O.
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Describe at least two ways that carbon can get from the atmosphere to the hydrosphere.
Answer:
One way is that carbon dioxide automatically dissolves in cold ocean surface waters anyway so large bodies of water already have a concentration of carbon dioxide. Another way is when carbon dioxide dissolves in rainwater which later reacts with minerals in rocks. These rocks then get carried away by rivers or streams into bigger bodies of water and the carbon is transported through the minerals in the rocks.
Why is Polaris an important star?
Because it is the brightest star in the night sky
Because appears to remain in a fixed location due north while all the other stars appear to move around it a.
Because it is located halfway between The Big Dipper and Cassiopeia
Because you can find the North star from any place on Earth and never lose your way
Pleaseeee helpppp ;-;
Answer:
BECAUSE APPEARS TO REMAIN IN A FIXED LOCATION DUE NORTH WHILE ALL THE OTHER STARS APPEAR TO MOVE AROUND IT.
Explanation:
I'M NOT SURE.CORRECT ME IF WRONG
Someone who looks after all of the different area managers in a large corporation such as in HR, Business Information, and Operations is called a:
The person who looks at the different area managers in a large corporation such as in HR, Business Information and Operations is known as a general manager.
What is organizational structure?An organizational structure can be described as the process which involves dividing an organization into several functional units. A functional organizational structure is a kind of structure used to organize staff by categorizing them into several departments based on their roles or functions, skill sets, and knowledge.
These departments are vertically structured and may include IT, sales, finance and marketing, research, customer service, etc. The various departments are headed by functional managers who have the responsibility of managing, overseeing, and reporting to the executive management.
A manager is an individual who has the responsibility of providing guidance, supervision, support, and administrative control, as well as acting as a role model to the employees working in an organization.
Generally, managers are involved in taking up leadership roles and are expected to build strong relationships with their subordinates by providing a fair ground for effective communication and sharing of resources.
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Organisms on earth are
th-based Ilfe forms.
hydrogen
oxygen
carbon
Hurryyyy!!
Answer:
carbon...?
Explanation:
Answer:
Carbon
Explanation:
Carbon makes up most of the building blocks of life. Hope that is right. Good luck
The Henry's Law constant (k) for carbon monoxide in water at 25°C is 9.71 x 10-4 mol/(L·atm). How many grams of CO will dissolve in 1.00 L of water if the partial pressure of CO is 2.75 atm? A) 3.53 x 10-4 g D) 7.48 x 10-2 g B) 2.67 x10-3 g E) None of these choices is correct. C) 9.89 x 10-3 g
Answer:
2.67 * 10-3 mol/L
Explanation:
Henry's law is a gas law that states that the amount of dissolved gas in a liquid is proportional to its partial pressure above the liquid. The proportionality factor is called Henry's law constant. (Wikipedia)
Given that; C =kP
C= concentration of a dissolved gas = ?
k = Henry's Law constant = 9.71 x 10-4 mol/(L·atm)
P = partial pressure of the gas = 2.75 atm
So,
C = 9.71 x 10-4 mol/(L·atm) * 2.75 atm
C = 2.67 * 10-3 mol/L
1. What is the density of a 75 g block of wood measuring 12 cm x 8 cm x 9 cm?
Answer:
0.087 g/cm^3
Explanation:
Density is Mass : Volume.
Volume = 12 x 8 x 9 = 864 cm^3
Mass = 75 g
Density = 75g/864 cm^3 = 0.087 g/cm^3
The density of a 75 g block of wood measuring 12 cm x 8 cm x 9 cm is 8.6 x 10⁻⁵ Kg/cm³.
What is density?
Density is defined as the mass per unit volume of the body. Mathematically-
ρ = M/V
Given is a 75 g block of wood measuring 12 cm x 8 cm x 9 cm.
We can write -
Mass = [m] = 75 g = 75/1000 = 0.075 Kg
Volume = [V] = L x B x H = 12 x 8 x 9 = 864 cm³
Therefore, the density of the object will be -
ρ = M/V
ρ = 0.075/864
ρ = 8.6 x 10⁻⁵ Kg/cm³
Therefore, the density of a 75 g block of wood measuring 12 cm x 8 cm x 9 cm is 8.6 x 10⁻⁵ Kg/cm³.
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An aerosol can was found to burst at a pressure of about 24 atm and 85 c. What was the pressure inside the can at normal room temperature ( about 23 c)
Answer:
Drd
Explanation:
If you dissolve 10g of NaOH in a 250 mL aqueous solution, what is the pH?
Convert 10g of NaOH to moles using the molar mass.
10 g NaOH / 39.997 g/mol NaOH = 0.25 mol NaOH
NaOH is a strong base so it dissolves completely in solution, so you’ll have 0.25 mol of OH-. Calculate the molarity of OH-.
0.25 mol OH / 0.250 L = 1.0 M OH-
Calculate the pOH. pOH = -log(1.0) = 0
pH = 14 - pOH = 14
This yellow nonmetal with a distinct odor is used in the manufacture of
gunpowder, the vulcanization of rubber, and in insecticides and
medicinal drugs.
Answer: it is Sulphur, S
Explanation:
HELP ASAPPPP PLEASEEEEEEEEEE
Answer: 1.) A. Nebula
2.) I think it's K. Planetary Nebula
3.) E. Red Supergiant
4.) C. Main Sequence
5.) F. Supernova
6.) I. White dwarf
7.) B. Protostar
8.) G. Black Hole
9) J. Black dwarf
10.) H. Neutron Star
11.) D. Red Giant
Select the correct answer.
Observe the two images. What is the correct conclusion?
copper in hot
sulphuric acid
bunsen burner
copper in
hydrochloric acid
Image 1
Image 2
O A. Copper reacts with any kind of acid.
B. Copper does not react with acids.
Conner rearts with sulfuric acid when heated
EXTRA CREDIT. The rate at which an object moves is its speed. If a horse
walked 50m in 68s, cantered 150m in 35s, and galloped 300m in 22s, what
would its average speed be? Show your work! Help ASAP
If you have a 15% salt water solution, how many grams of salt do you have if you have
50 ml of water.
Answer:
15 grams should be the answer
which formation is a result of a hotspot
Answer:
Hotspots occur when one of the Earth's plates moves over an unusually hot part of the Earth's mantle. These hot areas are usually relatively stationary and result in large amounts of magma rising up, piercing a hole in the plate to form a volcano. As the plates move, a series of volcanoes can form.