Answer:
Explanation:
Solids are matters whose shape are usually fixed. They have a definite volume which be measured at any point. The particles of solids are usually arranged in an order manner or pattern based on their crystal lattices. Solid particles are tightly and closely packed together and are held by a very strong attractive force.
Liquids do not have a fixed shape. Liquids have a definite volume which can easily be determined. The particles of liquids are closely packed and held by a stronger attractive force than those of gases but less strong when compared solids.
Gases do not have a fixed volume or shape. They occupy any volume of space they are found in. Particle of gases are poorly packed and they are held by weak attraction forces between their particles.
Answer:
Take this as a hint :
The value of the mole is equal to the number of atoms in just 12 grams of pure carbon-12. 12.00 g C-12 = 1 mol C-12 atoms = 6.022 × 1023 atoms • The number of particles in 1 mole is called avogadro's numberr (6.0221421 x 1023).
Explanation:
Answer:
Take 3 mL of the 5 M NaCl solution, 10 mL of the 10% glucose solution, and add water for a final volume of 100 mL.
Explanation:
- In order to calculate the required volume of the 5 M NaCl solution, we calculated the moles contained in a 100 mL solution that has a concentration of 150 mM:
0.1 L * 0.150 M = 0.015 moles of NaCl
With those moles we can calculated the required volume, using the concentration of the stock solution:
0.015 mol / 5 M = 0.003 L = 3 mL.
- To make a solution that has a 1 % concentration of glucose, from a 10 % glucose solution, is the same as to make it ten times less concentrated. Thus, with a final volume of 100 mL, you would need to take 10 mL of the 10% glucose solution, because 100mL * 10/100 = 10.
So in order to prepare the solution, you would need to take 3 mL of the 5 M NaCl solution, 10 mL of the 10% glucose solution, and add water for a final volume of 100 mL.
The height above or below sea level