Answer:
FDA
Explanation:
Answer:
FDA
Explanation: it right ;)
B) The smallest unit of P4.
C) The smallest unit of NH3.
D) The smallest unit of H2O.
Answer:
Option A
Explanation:
An atom is the smallest particle of a chemical element that can exist.
Using the method of elimination;
Option A - This correct because an atom is the smallest unit of a chemical element ( Neon). It fits the definition given above.
Option B - This option is wrong because P4 is a substance that is made up of four atoms of the same element, so it is a molecular element and not an atom.
A chemical compound is a chemical substance composed of many identical molecules composed of atoms from more than one element held together by chemical bonds.
Option C - This option is wrong because NH3 is a compound containing two different elements.
Option D - This option is wrong because H2O is a compound containing two different elements.
The overall total would be (3-) charge
b) mass percent sucralose:%?
The mass percentage of vitamin C is 74.5% and the mass percentage of sucralose is 25.5%.
Osmotic pressure (π) = iCRT
Where;
π = Osmotic pressure = 3.18 atm
i = Van't Hoff factor = 1 (molecular solution)
C = concentration (in mol/L)
R = gas constant = 0.082 LatmK-1mol-1
T = temperature = 287 K
But C = number of moles(n) /Volume (V)
volume = 41.1 mL or 0.0411 L
Substituting into the given equation;
π = n/V × RT
Make n the subject of the formula;
n = πV/RT
n = 3.18 atm × 0.0411 L/0.082 LatmK-1mol-1 × 287 K
n = 0.0056 moles
Mass of vitamin C = a
Mass of sucralose = b
Mass of sample = 1.149 g
Hence;
a + b = 1.149
b = 1.149 - a
Molar mass of vitamin C = 176 g/mol
Molar mass of sucralose = 398 g/mol
Total number of moles = number of moles of vitamin C + number of moles of sucralose
0.0056 moles = a/176 + (1.149 - a)/398
70048 ( 0.0056 ) = 398a + 176 (1.149 - a)
392.269 = 398a + 202.224 - 176a
392.269 - 202.224 = 398a - 176a
190.045 = 222a
a = 190.045/222
a = 0.856 g
But;
b = 1.149 - a
Where a = 0.856 g
b = 1.149 - 0.856
b = 0.293 g
Mass percent vitamin C = 0.856 g/1.149 g × 100/1
= 74.5%
Mass percent sucralose = 0.293/1.149 g × 100/1
= 25.5%
Learn more: brainly.com/question/14191541
ur answer is oxygen (O2)!!
oxygen (O2)