Answer:c
Explanation: gravity is pulling it down then k. energy because it hits the ground
Answer:
6.31×10^-7M
Explanation:
pH= -log[H+]
6.2 = -log[H+]
[H+]= antilog(-6.2) = 6.31×10^-7M
19. The
metallic properties that are caused by atoms rolling over each other in
metallic bonds are malleability and ductility. The atoms that are being rolled
over are delocalized electrons in the sea of electrons in the metallic bond
enable them to roll over when stress is applied.
<span>
20. </span><span>The
following scenarios that accurately describes a condition in which resonance
can occur is vibrating tuning fork is struck and begins to vibrate as the
object used to strike it is placed away from the tuning fork.</span><span>
*</span>
Answer:Boron
Explanation:
it is element 5 represented by the letter B
Answer:
Grams of the reactant would be required is 8.26 g
Explanation:
Decomposition of NI3 is :
2 NI3 (s) --------------------> N2 (g)............... +..................... 3 I2 (g)
2 mol..................................1 mol.........................................3 mol
2 x 394.7 g/mol..............28 g/mol....................................3 x 253.8 g/mol
789.4 g...............................28 g...........................................761.4 g
From chemical equation it is cleared that
761.4 g of iodine is obtained from = 789.4 g of NI3
Therefore,
7.97 g of iodine is obtained from = 789.4 g x 7.97 g / 761.4 of NI3
= 6291.518 / 761.4 of NI3
= 8.26 g of NI3
Hence
Grams of the reactant would be required = 8.26 g
