Answer:
liquid oxygen is highly flammable
Explanation:
near any source of heat. liquid oxygen can explode to flames thus being hazardous
Answer:
a. blue, b. red, c. red, d. basic - blue
Explanation:
a.washing powder ( containing sodium carbonate ) basic -blue
b. orange juice ( containing citric acid )- acidic -red
c. lemonade ( containing H2CO₃ )-acidic - red
d. cleaner ( containg NH₃ )- basic - blue
Answer:
Accuracy
Explanation:
It is important for scientists to review the work of other scientists, so they can be sure there are no mistakes or lack of judgement. They repeat to compare results to make hypotheses.
Answer:
Iron shavings
Explanation:
A substance that has a fixed chemical composition throughout and a mixture is when two or more substances are combined, but they are not combined chemically.
6.9 x 10^-4 would be .00069 written in scientific notation
