The first one is substance 3
The second one is Oxygen, Helium, and carbon dioxide
The third one is the oil floats on top of the water
Answer:
c) NOx and VOC
oxides of nitrogen (NOx) and volatile organic compounds (VOC)
Explanation:
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Answer:
put a test tube over the opening, remove it and quickly put a lit splint near the mout or in the tube. if you hear a squeaky pop it is hydrogen.
Explanation:
hydrogen ignites in air.
Answer:
Explanation:
I would ask him why would he want to add the blue stripe?
<u>Answer:</u> The average of the densities of the given measurements is 1.363 g/mL
<u>Explanation:</u>
The equation used to calculate density of a substance is given by:

We are given:
First measured value of density,
= 1.019 g/mL
Second measured value of density,
= 1.498 g/mL
Third measured value of density,
= 1.572 g/mL
Putting values in above equation, we get:


Hence, the average of the densities of the given measurements is 1.363 g/mL