Chemistry College

1.
How many moles of NaCl are in 1.5L of 0.25 M solution?

Answers

Answer 1

Answer:

0.375 moles

Explanation:

no of moles =vol×molarity

Related Questions

Please help me with this question please just help me with what is this is or synthesis singlereplacement
combustion
decomposition
double replacement

Answers

Answer:

1) Combustion

2)Synthesis

3)Single Replacement

4)Decomposition

5)Double Replacement

6)Synthesis

7)Double Replacement

8)Single Replacement

9)Combustion

10)Decomposition

Explanation:

Remeber, decomposisition is breaking things apart, synthesis is building them, cobusion will always make water and CO2 and will always burn O2, single replacemnt will have 1 thing replaced (single) and double replacement will have 2 things replaced (double).

Hope this helps!

supose 10 atoms of carbon (c) recat with 20 atoms of oxegen (o) to from 10 molecules of carbon dioxide (co2). According to the law of conservation of matter, how many atoms are presented in this reaction?

Answers

Answer:

30

Explanation:

CO2 means that there is 1 carbon and 2 oxygens  in each CO2 molecule.

If there are 10 atoms of Carbon that requires 20 atoms of oxygen.

The number of atoms present is 10 + 20 = 30 atoms of any kind present. You just need to add.

A compound contains 25.94%N and 74.06% O by mass whats the empirical formula

Answers

Answer:

the answer is NO or nitric oxide.

hope this helps, love. have a good day

Explanation:

Empirical formula is the simplest whole number ration of elements in a compound. Molecular formula is n times the empirical formula, where n is integers 1,2,... Therefore, the empirical formula is NO[tex]_2[/tex].

What is Empirical formula?

Empirical formula gives the proportion of the element that is present in a compound. It does not give information about the actual number or the arrangements of the atoms.

The relation between molecular formula and empirical formula can be given as

n= molecular formula÷ empirical formula

Number of gram atoms in compound and divide by smallest Number of gram atoms in compound

N=(25.94%)÷14=1.85/1.85=1

O=( 74.06% )÷16=4.62/1.85=2

The atomic ratio is 1:2

Whole number N:O is1:2

Empirical formula corresponding to this whole number is NO[tex]_2[/tex].

Therefore, the empirical formula is NO[tex]_2[/tex].

To know more about empirical formula, here:

https://brainly.com/question/21743699

#SPJ2

Name of equipments that uses in crude oil distillation?​

Answers

Explanation:

Crude oil distillation is a complex and capital-intensive process in petroleum refining. The crude oil distillation unit comprises distillation columns, pump-around loops, side strip.pers and a heat recovery system, known as the preheat train.

How many moles is 7.78 x 1024
formula units of MgCl2?

Answers

How many moles is 7.78 x 1024

formula units of MgCl2?

answer: 7966.72

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, there are 0.49moles of  MgCl[tex]_2[/tex] in  7.78 x 10²⁴atoms of MgCl[tex]_2[/tex] .

What is mole?

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity of amount of substance. It measure the number of elementary entities of a given substance that are present in a given sample. There are so many formula for calculating mole.

we know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number

mole =given number of atoms ÷ 6.022×10²³(Avogadro number)

given number of atoms of MgCl[tex]_2[/tex]= 7.78 x 10²⁴

Substituting the values

mole= 7.78 x 10²⁴÷ 6.022×10²³

mole = 0.49moles of  MgCl[tex]_2[/tex]

So, there are 0.49moles of MgCl[tex]_2[/tex] in  7.78 x 10²⁴atoms of MgCl[tex]_2[/tex] .

To know more about mole, here:

https://brainly.com/question/15209553

#SPJ2

I NEED HELP ASAP !!!!

Answers

Answer:

5)A &D 6)B

Explanation:

Mass of Fe is 55.845 u

Mass of Cl is 35.453 u

And their sum is 91.298 u

Which type of rock is formed when rocks are melted deep in the Earth and cool to form new rocks?

A. Igneous
B. Metamorphic
C. Sandstone
D. Sedimentary

Answers

A. Igneous rocks

Igneous rocks are formed from melted rock deep inside the Earth. Sedimentary rocks are formed from layers of sand, silt, dead plants, and animal skeletons. Metamorphic rocks formed from other rocks that are changed by heat and pressure underground.

Answer:

igneous

Explanation:

key word: melt, cool. igneous rocks are when lava is melted then cooled off, then becoming a igneous rock.

Other Questions
What was the system called where laborers are bound to a landowner because of debt?crop lienssubdivisionpeonagefree labor How can accidental transfer of DNA impact a crime scene investigation? In addition, explain why accidental DNA transfer cannot be used as an excuse to throw away all DNA evidence found at a crime scene? when plate movement rocks to break its called It seems to me that..__________use marking signal Warmup- if you was an agent what 2 sportsyou would manage and why? The work of writing a budget is done in Congress, but the president can formulate abudget proposal and no linksWhat effect does Mathilde's borrowing the necklace have on the plot of "The Necklace"? as part of their third-year defence against the dark arts exam, what creature did harrys class have to navigate when crossing a series of potholes? what are three physical properties with constant value You wish to buy a new skateboard. To earn money, you sell your baseball cards toyour friends for $2.50 each. If the new skateboard costs $98, what is the minimum numberof baseball cards you will have to sell? Briefly, why did the Russians develop their own religion? stion 13: A typical barrel of bot-oil contains 70 liters of oil. If a hole he barrel is causing a constant 6 liters an hour leak, use a function to show the amount of oil in the barrel over time. Y= -2x+4 in function notation What are the three layers that make up the body of a Cnidarian?A. endoderm, mesoderm, ectodermB. endoderm, mesoglea, ectodermC. ectoderm, mesoderm, mesogleaD. endoderm, mesoglea, epidermis Question is on the picture The language used in texting is acceptable in business writing. True or false question math genius help but preparation for tmrw math exam a) 2x-y-3=0,4x+y-3=0lots of thx if u helped Which fraction is the same as 3.375? is atmosphere pressure at high altitudes is less than the pressure at ground, true or false A school bookstore has the following items for sale.A sign that shows that a notebook costs 2 dollars and 89 cents, a pencil costs 79 cents, and a folder costs 1 dollar and 35 cents.Part AHow much will Luke pay for 4 notebooks? Enter your answer in the box.$ 11.56Part BTraci uses partial products to find the cost of 14 pencils.A piece of paper has the following text writte on it. 14 pencils at 79 cents each. 10 times 0.7 equals 7. 10 times 0.9 equals 9. 4 times 0.7 equals 2.8. 4 times 0.9 equals 3.6. 7 dollars plus 9 dollars plus 2 dollars and 80 cents plus 3 dollars and 60 cents equals 22 dollars and 40 cents.Which explains whether or not Tracis partial products are correct?Traci's partial products are not correct. She should have multiplied 10 0.09 and 4 0.09. The actual cost is $11.06.Traci's partial products are not correct. She should have multiplied 10 0.07 and 4 0.07. The actual cost is $13.58.Traci's partial products are not correct. She should have multiplied 4 0.07 and 4 0.09. The actual cost is $16.64.Traci's partial products are correct. The actual cost is $22.40.