Answer:A plant cell has a well defined shape, because it has a cell wall.
Explanation:
51.41%
Percentage Composition from Formulas
A more complex example is sucrose (table sugar), which is 42.11% carbon, 6.48% hydrogen, and 51.41% oxygen by mass.
Or
53.3 %
Thus the % composition of glucose by mass is carbon 40.0 % oxygen 53.3 % hydrogen 6.7 % In this way, the % composition by mass of any compound can be calculated provided that its formula is known.
...
What is the percentage composition of sugar?
Element Symbol Mass Percent
Hydrogen H 6.714%
Carbon C 40.001%
Oxygen O 53.285%
Answer: An atom is the sub-component of a molecule, or the smallest unit of matter. It is the smallest part an element can divide into. A molecule is made up of atoms that are bound by ionic, covalent or metallic bond.
Answer:
1.3005 M
Explanation:
Given that,
Mass of NaCl = ![76 \ g](https://tex.z-dn.net/?f=76%20%5C%20g)
Molar mass of NaCl= ![22.99+35.45=58.44\ g/mol](https://tex.z-dn.net/?f=22.99%2B35.45%3D58.44%5C%20g%2Fmol)
The formula for calculation of moles,
Moles,
![n=\frac{given \ mass}{molar\ mass}\\n=\frac{76}{58.44} \ g/mol\\n=1.3005\ g/mol](https://tex.z-dn.net/?f=n%3D%5Cfrac%7Bgiven%20%5C%20mass%7D%7Bmolar%5C%20mass%7D%5C%5Cn%3D%5Cfrac%7B76%7D%7B58.44%7D%20%5C%20g%2Fmol%5C%5Cn%3D1.3005%5C%20g%2Fmol)
Given that volume ![=1\ ltr](https://tex.z-dn.net/?f=%3D1%5C%20ltr)
Molarity,
![=\frac{moles\ of\ solute}{litre\ of\ solution} \\=\frac{1.3005}{1}\\ =1.3005\ M](https://tex.z-dn.net/?f=%3D%5Cfrac%7Bmoles%5C%20of%5C%20solute%7D%7Blitre%5C%20of%5C%20solution%7D%20%5C%5C%3D%5Cfrac%7B1.3005%7D%7B1%7D%5C%5C%20%3D1.3005%5C%20M)
Therefore the molarity is 1.3005 M.
1.0 mg/mL
a) Convert <em>grams to milligrams
</em>
Mass = 1.0 g × (1000 mg/1 g) = 1000 mg
b) Convert <em>litres to millilitres
</em>
Volume = 1 L × (1000 mL/1 L) = 1000 mL
c) Calculate the <em>density
</em>
ρ = mass/volume = 1000 mg/1000 mL = 1.0 g/mL