A protons and electrons is the correct one
Answer:
Your question is incomplete, please edit it.
Answer:
The actual mass is either 453 or 447
Step-by-step explanation:
7 percent of 450
= (7/100) * 45
= 3.15
error = 3.15 g
hence actual mass
= 450 + 3.15
= 453.15
or
= 450 - 3.15
= 446.85
Answer:
3x²+8xy+4y²
Step-by-step explanation:
Opening brackets,
3x²+6xy+2xy+4y²
=3x²+8xy+4y²
