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TiliK225 [7]
3 years ago
13

HELP PLEASE I NEED HELP THANKS I LOVE U

Chemistry
1 answer:
Pani-rosa [81]3 years ago
4 0

Answer:

0.500-Molarity solution

Explanation:

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Eli states that sodium phosphate is a mixture because it is composed of both sodium ions and phosphate ions.
KonstantinChe [14]

Answer is: c. It is incorrect because sodium phosphate is a compound that has a single composition.

Sodium phosphate is chemical compound composed of atoms connected with chemical bonds.

Pure substance is made of only one type of atom (element) or only one type of molecule (compound), it has definite and constant composition with distinct chemical properties.

Pure substances can be separated chemically, not physically, that is difference between pure substances and mixtures.

7 0
3 years ago
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What factors affect freezing-point depression of a solution? (select all that apply)
ANTONII [103]

Answer:

A and F i think

Explanation:

Freezing point depression is a colligative property observed in solutions that results from the introduction of solute molecules to a solvent. The freezing points of solutions are all lower than that of the pure solvent and is directly proportional to the molality of the solute

8 0
3 years ago
28. Describe the molecular geometry and hybridization of the N, P, or S atoms in each of the following compounds. (a) H3PO4, pho
Whitepunk [10]

Answer:

See explanation

Explanation:

The molecular geometry of an atom is connected to the number of electron pairs that surround it(whether lone pairs or bonding pairs) as well as its hybridization state. We shall now examine the N, P, or S atoms in each of the following compounds.

a)

In H3PO4, P has a tetrahedral molecular geometry and is sp3 hybridized.

b) In NH4NO3

N is sp3 hybridized in NH4^+ and sp2 hybridized in NO3^-. Also, N is tetrahedral in NH4^+ but trigonal planar in NO3^-.

c) In S2Cl2, we expect a tetrahedral geometry but as a result of the presence of two lone pairs on each sulphur atom, the molecular geometry is bent. The sulphur is sp3 hybridized.

d) In K4[O3POPO3], each phosphorus atom is in a tetrahedral molecular geometry and is sp3 hybridized.

8 0
3 years ago
Explain how original mass of dry ice compares with the mass of carbon dioxide gas?
MAVERICK [17]
The freezing temperature at a normal sea level air pressure is negative 78.5 degrees.
8 0
3 years ago
if there are 19 grams of oxygen in a sample of aluminum oxide . how many grams of aluminium are present ​
Maksim231197 [3]

Explanation:

Al2O3

16=molar mass of one oxygen atom

Number of moles: mass/molar mass

Mol of O3: 19÷(16*3) = 0.40 g/mol

mole ratio

0.40: 3 (oxygen)

0.27: 2 (aluminum)

Mass = molar mass*mole

0.27*(27*3)= 21.87g

3 0
3 years ago
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