Answer:
4.419 g
Explanation:
55 years is 5.5 half lives
200 g * (1/2)^5.5 = 4.419 g
<u><em>Ponds and rivers are two types of . . . . freshwater ecosystems</em></u>
GDP measures the value of goods and services produced within a country's borders, by citizens and non-citizens alike. GNP measures the value of goods and services produced by only a country's citizens but both domestically and abroad. GDP is the most commonly used by global economies.
B) Water only dissolves other non-polar molecules.
<em>This option is wrong because water is a polar molecule and it can dissolve only other polar molecules.</em>
Explanation:
2H2(g) + O2(g) → 2H2O(l ) Chemical equations give the following information about chemical reactions. Chemical equations show the formulas for the substances that take part in the reaction.
