Answer:
165.52 g/mol
Explanation:
As the temperature raised to 100 C, part of the initial mass of liquid converted to gas, specifically 2.00-0.581 = 1.419 g. This gas occupies a volume of around 265 mL, at a pressure of 752 mm Hg and a temperature of 100 C. Assuming this gas behaves ideally, we can estimate its molecular weight 
using the ideal gas law:
with R= 0.082 atm L/(mol K)
or 
Before applying the formula, we convert volume to L (1L=1000 mL), pressure to atm (1 atm=760 mmHg), and temperature to K (K=273+C).
Ultimately, inserting values into the formula gives
g/mol
The concentration of the drug stock solution measures 1.5 × 10^-9 M, indicating that there are 1.5 × 10^-9 moles of the drug for every liter of solution.
To determine the number of moles in 1 ml (which is 1 × 10^-3 L), calculate: 1 × 10^-3 L × 1.5 × 10^-9 moles/1 L = 1.5 × 10^-12 moles.
Each mole of the drug consists of 6.023 × 10^23 molecules.
Thus, for 1.5 × 10^-12 moles of the drug, the corresponding number of molecules is:
1.5 × 10^-12 moles × 6.023 × 10^23 molecules/1 mole = 9.035 × 10^11 molecules.
The total number of cancer cells is 2.0 × 10^5.
The ratio hence equals the drug molecules divided by the cancer cells:
9.035 × 10^11 / 2.0 × 10^5 = 4.5 × 10^6.
Answer: refer to the explanation
Explanation:
This question requires calculating mass. To determine the mass, we need values for two parameters, namely the specifications for the grade 70 tow chain and the mass per unit length given.
Assuming the mass per unit length is 3 kilograms per meter (kg/m) and the length of the grade 70 tow chain is 5 meters (m).
Thus, the formula used to compute the mass of the chain is as follows;
Mass of the chain = mass per unit length (kg/m) × length ---------------------------------------------------------------------------------------------------------------------(1).
Mass of the chain = 3 kg/m × 5 m.
Mass of the chain equals 15 kg.
The equal mass indicates that both atoms have the same number of protons and neutrons.
A positive charge signifies a difference in electron count.
Assuming the atomic number is A,
the mass number equals M.
In a neutral atom, there are A electrons.
A negatively charged atom would have A + 1 electrons [while the count of protons and mass number remains unchanged].
A positively charged atom contains A - 1 electrons [with consistent protons and mass number].
For instance: Cl- and Cl+.
