Sand is converted to pure silicon in a three step process. The third step is sicl4(g) + 2mg(s) → 2mgcl2(s) + si(s) δh = −625. 6 kj what is the enthalpy change when 25. 0 mol of silicon tetrachloride is converted to elemental silicon?

Arealtor is studying the graph above, which shows the expected value of properties in her area over the next 24 years. if t represents the number of years after 2014, in what year should the increase in property values start to slow down? a. 2008 b. 2018 c. 2022 d. 2030

17 a tourist was planning a trip by car for travelling at some constant speed for 2.5 hours. however, he found that if he increases the speed by 20 km/h he can cover the same distance in 30 minutes less time than it was planned. what was the planned speed of the tourist, in km/h?

What is an example of a college admissions test? -state test -cat -act -personality test