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stich3 [128]
4 years ago
13

For a substance to reach its boiling point, a substantial amount of energy must be added. The boiling point occurs when the ____

_____.
A temperature increases
B vapor pressure equals atmospheric pressure
C particle velocity equals the boiling point
D vapor pressure reaches the critical point
Chemistry
2 answers:
riadik2000 [5.3K]4 years ago
3 0

Answer:B

Explanation:

kirza4 [7]4 years ago
3 0

B, vapor pressure equals atmospheric pressure

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But Are Punnett square percentages always correct?
AleksAgata [21]

Answer:

yes

Explanation:

cuz is a square and if all angles are equal of a square then it is correct

8 0
3 years ago
A compound made of two elements, iridium (Ir) and oxygen (O), was produced in a lab by heating iridium while exposed to air. The
natima [27]
1) Compund Ir (x) O(y)

2) Mass of iridium = mass of crucible and iridium - mass of crucible = 39.52 g - 38.26 g = 1.26 g

3) Mass of iridium oxide = mass of crucible and iridium oxide - mass of crucible = 39.73g - 38.26g = 1.47g

4) Mass of oxygen = mass of iridum oxide - mass of iridium = 1.47g - 1.26g = 0.21g

5) Convert grams to moles

moles of iridium = mass of iridium / molar mass of iridium = 1.26 g / 192.17 g/mol = 0.00656 moles

moles of oxygen = mass of oxygen / molar mass of oxygen = 0.21 g / 15.999 g/mol = 0.0131

6) Find the proportion of moles

Divide by the least of the number of moles, i.e. 0.00656

Ir: 0.00656 / 0.00656 = 1

O: 0.0131 / 0.00656 = 2

=> Empirical formula = Ir O2 (where 2 is the superscript for O)

Answer: Ir O2
5 0
4 years ago
Read 2 more answers
Chapter 2 test chemistry
____ [38]

Im sorry but Chapter 2 test chemistry doesnt sound much like a question can you be more specific thanks ik u can be more specififc!

6 0
4 years ago
Name the reaction processes that lead to the two types of synthetic polymers.
Ksivusya [100]

The reaction processes that lead to the two types of synthetic polymers are chain reaction polymerization and step reaction Polymerization.

<h3>What is Polymerization Reaction? </h3>

The chemical reaction which involves the addition of monomers to form higher molecular mass molecules is known as polymerization. There are two basically two types of polymerization, one is chain-reaction (or addition) and the other is step-reaction (or condensation) polymerization.

<h3>Chain-reaction (addition) polymerization</h3>

One of the most common and important types of polymer reactions is chain-reaction (addition) polymerization. This type of polymerization involves three step process including two chemical entities. The first which is known simply as a monomer. It is initially exists as simple units. Normally in all cases, the monomers must have at least one carbon-carbon double bond. Ethylene is one of the best known example of a monomer which is used to make a common polymer.

<h3>Step-reaction (condensation) polymerization </h3>

It is second type of polymerization. This polymerization method is used to produce polymers having lower molecular weight as compared to chain reactions and requires higher temperatures to occur.

Unlike chain reaction polymerization, this reactions include two different types of di-functional end groups or monomers which react with one another, forming a chain.

Step wise polymerization produces a small molecular by-product (water, HCl, etc.). The example is the formation of Nylon 66.

Thus, we concluded that the reaction processes that lead to the two types of synthetic polymers are chain reaction polymerization and step reaction Polymerization.

learn more about Polymerization reaction:

brainly.com/question/7025919

#SPJ4

7 0
2 years ago
How would you seprate a mixture of sand and salt?
lys-0071 [83]
First, you mix the salt and sand with water, so the salt dissolves. Next, you filter the sand out, so you have the slat water and sand separated. Then, you evaporate the water, leaving the salt behind.
3 0
3 years ago
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