Given the unbalanced equation: _MnO + _HCI - _MnCl2 + _H20+ _Ch2
When the equation is balanced using the smallest whole number coefficients, the coefficient of HCl is
1) 1
2) 2
3)3
4) 4

In what way do investigations build scientific knowledge? the results of investigations lead to questions that cannot be tested. they reflect the opinions and social values of scientists, ensuring valid information. the results of investigations lead to new questions, which lead to new investigations. they are not influenced by the research of earlier scientists, so they are able to address gaps in understanding.i