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anastassius [24]
3 years ago
7

A student notices dark clouds in the sky and that the playground is wet the student reasons that it rained which scientific skil

l describes the students reasoning
A. classifying

B. observing

C. inferring

D. predicting
Chemistry
1 answer:
Fantom [35]3 years ago
8 0

Answer:

the answer is B. observing

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Vhich element would Element X most likely be grouped with on the periodic table
Sveta_85 [38]

Answer:

It might be xenon (Xe)

Explanation:

3 0
3 years ago
Ice melts into water. The correct equation to calculate the heat of this reaction is...
mr_godi [17]

Answer:

q=mAHf

Explanation:

When water change form from solid(ice) to liquid, it will need heat that depends on the heat of fusion(Hfus). If the form changed from liquid to gas it will use the heat of vaporization(Hvap) instead. The heat of fusion usually written just AT

q=MCAT is used to calculate heat when temperature change(AT = delta T= difference in temperature)

q=mAHvap is wrong because you need if the form change from liquid to gas

q=mc^2 is wrong because it describes the relation of mass and energy, not the form.

The answer should be q=mAHf

6 0
3 years ago
How many moles are in 2.04 × 1024 molecules of h2o?
EleoNora [17]

Answer:

3.4moles

Explanation:

Given parameters:

Number of molecules = 2.04 x 10²⁴

Unknown: Number of moles

Solution

We use the concept of mole to solve this kind of problem.

A mole is the amount of substance that contains Avogadro's number of particle i.e 6.02 x 10²³ molecules

Solving

For elementary particles:

Number of moles = \frac{number of particles}{6.02 x 10^{23} }¹ molecules

Number of moles = \frac{2.04 x 10^{24} }{6.02 x ^{23} }

Number of moles of H₂O = 0.34 x 10¹ = 3.4moles

5 0
4 years ago
In the copper- planting solution lab placed copper pennies in vinger is an weak acid with hydrogen ions when you put the pennies
kakasveta [241]
Hydrogen gas

Acid + metal = salt and hydrogen gas
8 0
3 years ago
What should go in the blanks?
amm1812

Answer:

i hate chemistry w all my heart so i suggest maybe finding the worksheet on the internet or smthing :)

Explanation:

8 0
3 years ago
Read 2 more answers
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