Answer: Lead(II) nitrate but idk the rest
Explanation:
Astatine is At in the periodic table, hope I helped :))
Answer:
In a planned economy, a central authority determines who buys goods and services. In a market economy determines who buys these products.
Explanation:
In a planned economy, the market has a secondary role for the allocation of resources.
Market economy is understood as the organization and allocation of the production and consumption of goods and services arising from the interplay between supply and demand.
Answer:
0.0400 g for the example given below.
Explanation:
pH value is not provided, so we'll solve this problem in a general case and then we will use an example to justify it.
- By definition, .
- NaOH is a strong base, as it's a hydroxide formed with a group 1A metal, so it dissociates fully in water by the equation: .
- From the equation above, using stoichiometry we can tell that the molarity of hydroxide is equal to the molarity of NaOH: .
- Concentration of hydroxide is then equal to the ratio of moles of NaOH and the volume of the given solution. Moles themselves are equal to mass over molar mass, so we obtain: .
- We also know that . Take the antilog of both sides: .
- Solve for the mass of NaOH: .
Now, let's say that pH is given as 12.00 and we use a 100-ml volumetric flask. Then we would obtain: