Answer:
A. 3
Explanation:
Principle 3:
Less Hazardous Chemical Syntheses - Wherever practicable, synthetic methods should be designed to use and generate substances that possess little or no toxicity to human health and the environment.
First one is because they’re alternate angles and the second one is because all angles on a straight line = 180° therefore its co interior i think
Answer:
pH>7
sour taste
donate H+ ions
turn litmus paper from blue to red
Explanation:
Fe2O3
That’s the formula for iron oxide
Answer:
There are 110 elements known to us, out of which 92 are naturally occurring, while the rest have been prepared artificially. Elements are further classified into metals, non-metals, and metalloids..
Explanation:
Hope it helps you..
Y-your welcome in advance..
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