Answer:
1. 2Na + 2HCl = 2NaCl =H2
2. 2Mg + O2 = 2MgO
Explanation:
make sure that the number of atoms of each element is the same on each side of the equation
1. 2Na + 2HCl = 2NaCl =H2
<em><u>on LHS of equation,</u></em>
Na = 2
H = 2
Cl =2
<em><u>On RHS of equation, </u></em>
Na=2
H= 2
Cl =2
2. 2Mg + O2 = 2MgO
<em><u>on LHS of equation,</u></em>
Mg = 2
O2 = 2
<em><u>On RHS of equation, </u></em>
Mg = 2
O2 = 2
<em><u /></em>
Answer:
D) 0.50 mole of Ne
Explanation:
Given data:
Number of molecules of nitrogen = 3.0×10²³ molecules
Which sample contain same number of molecules as nitrogen= ?
Solution:
A) 0.25 mole of O₂
1 mole = 6.022×10²³ molecules
0.25 mol × 6.022×10²³ molecules / 1 mol
1.51×10²³ molecules
B) 2.0 moles of He.
1 mole = 6.022×10²³ molecules
2.0 mol × 6.022×10²³ molecules / 1 mol
12.044×10²³ molecules
C) 1.0 moles of H₂
1 mole = 6.022×10²³ molecules
D) 0.50 mole of Ne
1 mole = 6.022×10²³ molecules
0.50 mol × 6.022×10²³ molecules / 1 mol
3.0×10²³ molecules
Answer:
the equation for cylinders is V = (pi)r2h
none of these are even close but i can do a little more research
sorry if this one wasnt as much help
False, many chemicals can be toxic to the drainage systems, and can make their way into the ocean harming sea life.
