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Sedaia [141]
3 years ago
11

Ben and Jerry were testing powders in science lab. First they put the powder in a zip lock bag. Next they added some water. The

powder fizzed and bubbled; soon it disappeared. When the bubbling stopped the bag contained a clear liquid and a lot of gas.
What is the MOST OBVIOUS sign of a chemical change in this reaction?
Chemistry
2 answers:
ch4aika [34]3 years ago
6 0
The powder fizzled and bubbled; soon it disappeared.
fgiga [73]3 years ago
3 0
The most obvious one is that when the powder came into contact with the water it fizzed.
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Answer:

A

Explanation:

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3 years ago
Will give brainliest this is simple plz help
julsineya [31]

Answer:

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Phosphoric acid, which is commonly used as rust inhibitor, food additive and etching agent for dental and orthopedic use, can be
Sphinxa [80]

Answer:

P_4_{(I)}+5O_2_{(g)}+6H_2O_{(l)}\rightarrow +4H_3PO_4_{(l)}

Explanation:

The first step is:

P_4_{(I)}+5O_2_{(g)}\rightarrow 2P_2O_5_{(g)}

Second step is:

P_2O_5_{(g)}+3H_2O_{(l)}\rightarrow 2H_3PO_4_{(l)}

Multiplying second step by 2, and adding both the steps, we get that:

P_4_{(I)}+5O_2_{(g)}+2P_2O_5_{(g)}+6H_2O_{(l)}\rightarrow 2P_2O_5_{(g)}+4H_3PO_4_{(l)}

Cancelling common species, we get that:

P_4_{(l)}+5O_2_{(g)}+6H_2O_{(l)}\rightarrow +4H_3PO_4_{(l)}

6 0
3 years ago
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AleksAgata [21]

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true

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A single replacement reaction is a reaction that an element is displaced with another element in a compound

A+BC------AC+B

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