The answer is 2) 4.7 g/mL because the solid use 17 mL and 80g/17mL is 4,7 g/mL.
Answer:chromosome is made of DNA. DNA is double helix structure made of sugar, phosphorus and nitrogen bases.
Explanation:
Answer:
Explanation:
Na reacts with all OH groups to produce hydrogen.
The reaction with cyclobutanol is shown below.
The reaction with butanoic acid is
Both compounds release bubbles of hydrogen, so you can't use sodium to distinguish between them.
Answer:
d. Radon-222
Explanation:
²²⁶₈₈Ra → ²²²₈₆Rn + ⁴₂He
Alpha particle is a helium nucleus with mass number 4 and atomic number 2. According to the law of conversation of mass, the sum of the mass number and atomic number must be equal on both side of the reaction.
Since the mass number of Ra is 226 and that of He is 4. The mass number of the unknown element must be 226 - 4 = 222.
Since the atomic number of Ra is 88 and that of He is 2. The atomic number of the unknown element must be 88 - 2 = 86.
Now looking in the periodic table Radon is the only element with atomic number 86.
Answer:
Option c. 40 mL
Explanation:
Dilution formula:
M Concentrated . Concentrated Volume = Diluted volume . M diluted
1.50 M . Concentrated volume = 300 mL . 0.200 M
Concentrated volume = (300 mL . 0.200 M) / 1.50 M
Concentrated volume = 40 mL
When the dilution factor is applied, it is indicated how many times a concentration is diluted to obtain a lower solute concentration, so its concentration depends on the number of solute particles and the total volume
