A scientific model must make a testable prediction. a scientific model must make a testable prediction.

1 answer:

8 0

It is true because Scientists will create models (simplified views of reality) to help them focus on the basic fundamental processes.

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Which term best describes this reaction? 2 carbons double bonded to each other, with CH 3 above the left C and H above the right

Ierofanga [76]

Answer:

addition polymerization

Explanation:

In addition polymerization, the monomers are simply joined to each other to form a polymer having the same empirical formula as the monomer but of higher relative molecular mass. The monomers in addition polymerization are usually simple unsaturated molecules such as alkenes.

We can deduce the reaction to be an addition polymerization because of the the attachment of n to both the unsaturated monomer and the saturated polymer without the loss of any small molecule. If it was a condensation polymerization, there would have been an accompanying loss of a small molecule such as water.

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4 years ago

How many grams are in 2.3 x 10-4 moles of calcium phosphate, Ca3(PO3)2?

scZoUnD [109]

Answer:

7136900g or 7136 kg

Explanation:

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3 years ago

Which of the following elements has two valence electrons?

lara31 [8.8K]

Beryllium, Magnesium, Calcium....etc have two valence electrons

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3 years ago

Which solution has the lowest freezing point?

Leokris [45]

Correct Answer: Option 3 i.e. 30 g of KI dissolved in 100 g of water.

Reason:
Depression in freezing point is a colligative property and it is directly proportional to molality of solution.

Molality of solution is mathematically expressed as,
Molality = $\frac{\text{Number of moles}}{\text{Weight of solvent (Kg)}}$ 

In case of option 1 and 2, molality of solution is 0.602 m. For option 3, molality of solution is 1.807 m, while in case of option 4, molality of solution is 1.205 m.

Thus, second solution (option 2) has highest concentration (in terms of molality). Hence, it will have lowest freezing point

3 0

3 years ago

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Once the sun's energy reaches the earth's atmosphere through radiation, it is circulated within the atmosphere and oceans throug

maw [93]

The sun's energy would be circulated through convection. This is because whenever you see the word "circulate", there is a pretty good chance it has something to do with convection.

5 0

4 years ago

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