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2 years ago

What mass of sodium chloride contains 4.59 x 10 24 formula units?

1 answer:

7 0

The term formula units means molecules.

Then, what you are looking for is the mass in 4.59*10^24 molecules.

The procedure involves to convert the 4.59 * 10^24 molecules into moles and use the molar mass of the sodium chloride.

1) Number of moles = 4.59 * 10^24 molecules / (6.02 * 10^23 molecules/mol) = 7.62 mol

2) Molar mass of NaCl = 22.99 g/mol + 35.45 g/mol = 58.44 g/mol

3) mass of NaCl = molar mass * number of moles = 58.44 g/mol * 7.62 mol = 445.31 g of NaCl

Answer: 445.31 g of NaCl.

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How do I turn 2 s into one in the products

-BARSIC- [3]

Make the equation equal on each side.

With number 1 it says the left side of the arrow has 1 Sn, 2 S, and 2 O.

The right has 1 Sn, 4 O, and 1 S.

So you have to balance the equation by putting numbers in front of the compounds.

SnS2 + O2 = SnO2 + SO2

SnS2 + 3 O2 = SnO2 + 2 SO2

Now there is 1 Sn, 2 S. and 6 O on each side. The large number in front of the compounds essentially multiplies it by that the subscript of that number. So with O2 it says there are 2 Oxygens. So they come in pairs. If you get 3 pairs of Oxygens there will be 6.

The same process goes with the rest of them too. Sometimes it takes a few guesses. Just figure them out like an algebra problem. Put the equal sign between them like I did. It maked it easier for me.

5 0

2 years ago

Find the density of a gas at STP if it’s molar mass is 112g/mol

AleksandrR [38]

Answer:

D= 5 g/L

Explanation:

M= D x Vm

M is the molar mass = 112g/mol

D is the density

Vm is the molar volume whuch is 22.4L at STP

now substitute;

112 = D x 22.4

D= 112\22.4

D= 5 g/L

5 0

2 years ago

PH Range of 7.1-14<br> Is that acid or a base?

Taya2010 [7]

Answer:

pH is a measure of how acidic/basic water is. The range goes from 0 - 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base.

Explanation:

3 0

3 years ago

Match each type of chemical bond with its properties. Drag the items

natka813 [3]

Explanation:

covalent bond poor thermal conductivity

molecular compounds

metallic bond ductile

electron sea model

ionic bond crystalline

hard and brittle

Covalent compounds have the following properties:

Gases and volatile liquids or low melting point solids
Often insoluble in polar solvents
Mainly non - conductors
Have slow reactions

Metallic compounds:

Have good malleability, ductility, electrical and thermal conductivity.
A large sea of electron by jointly packed atoms.
They are mostly in metals
Accounts for the bulk of the physical properties displayed by metals

Ionic compounds:

High melting and boiling point
Soluble in polar liquids
Conducts electricity in molten or aqueous forms.
Mostly crystalline solids
Usually hard and brittle
Undergoes fast chemical reactions

learn more:

Covalent bonds brainly.com/question/5258547

Ionic bond brainly.com/question/6071838

#learnwithBrainly

5 0

3 years ago

I know the correct answer is either a or d. Can anyone explain which one it is and why? CH3C ≡ CCH2CH2Cl is named: a. 1-chloro-3

tiny-mole [99]

Answer:

Explanation:

CH₃C≡ CCH₂CH₂Cl

Since there are 5 carbons so the suffix used is "pent"

There is a triple bond so its alkyne

So the compound becomes 2-pentyne (2 because the triple bond is with the 2nd carbon)

Then,

The functional group of chlorine is attached with 5th carbon So the compound becomes

5-chloro,2-pentyne

6 0

2 years ago