D 2.88 g 17. Elements X and Y react to form a covalent compound with formula XY2.
Which of the following is true?
Unsur X dan unsur Y bertindak balas untuk membentuk satu sebatian kovalen dengan
formula XY2
Antara berikut, yang manakah benar?
X²
Electron arrangement of atom X Electron arrangement of atom Y
Susunan elektron atom X
Susunan elektron atom Y
2.8.2
2.8.7
2.4
2.6
A
B
C
2.5
2.7
D
2.1
2.7

Which is true of transition metals when moving from left to right on the periodic table? the d sublevels are not filled across the period. the cation radii become larger across the period. atomic radii increase slightly and then start to decrease. atomic radii decrease slightly and then start to increase. o

During trial 2, what allowed you to determine that aluminum was the limiting reactant? check all that apply. all of the copper dissolved. all of the aluminum dissolved. the solution turned clear. the number of grams of copper(ii) chloride used in the reaction was greater than the number of grams of aluminum. the molar ratio of copper(ii) chloride to aluminum was greater than 3: 2, the equation’s molar ratio.

If 34.2 grams of lithium react with excess water, how many liters of hydrogen gas can be produced at 299 kelvin and 1.21 atmospheres? 2 li (s) + 2 h2o (l) yields 2 lioh (aq) + h2 (g)