4 years ago

ILL GIVE YOU BRAINLIST !!! HAVE TO GET IT RIGHT !!

Chemistry

1 answer:

inysia [295]4 years ago

4 0

Answer: The 3rd and 6th bullet point is the quantitative data.

Explanation: Quantitative data is expressed by NUMBERS and Qualitative data is expressed by WORDS. The 3rd and 6th one is correct because they both use numbers to compare how much time hummingbirds spent feeding on nectar.

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Two chemicals are mixed together and a gas is produced. * chemical change physical change

givi [52]

Answer:

chemical change

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chemical change is when a substance combine with another substance to form a new substance.

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In which of the ions do all x-o bonds (x indicates the central atom) have the same length?

Radda [10]

Answer: All of the ions do all x-o bonds (x indicates the central atom) have the same length.

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4 years ago

A banana rots if its out to long.What property is this

s2008m [1.1K]

Chemical properties because It`s the ethylene gas and bacteria and fungi that attack the banana.

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A liquid takes 10.14 x 10^6 J of energy to boil 28.47 kg at 298 K. Using the latest heats of vaporization, what substance is thi

otez555 [7]

A liquid takes 10.14 x 10^6 J of energy to boil 28.47 kg at 298 K. Using the Latent heats of vaporization of some of the substances:

Acetone: 538,900 $\frac{J}{kg}$

Ammonia: 1,371,000 $\frac{J}{kg}$

Propane: 356,000 $\frac{J}{kg}$

Methane: 480,600 $\frac{J}{kg}$

Ethanol: 841,000 $\frac{J}{kg}$

Calculating the latent heat of vaporization of the given substance:

Heat required = $10.14 * 10^{6} J$

Mass of the substance boiled = 28.47 kg

Latent heat of vaporization = $\frac{10.14 * 10^{6} J}{28.47 kg} = 3,56,000 \frac{J}{kg}$

So the substance boiled is propane.

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3 years ago

3. Which oxidation-reduction reactions are best balanced by the half-reaction method? (1 point)

34kurt

Answer:

the answer is ionic reactions

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4 years ago