The Periodic Table of Elements is organized by the number of:

Chemistry

2 answers:

bija089 [108]2 years ago

7 0

Answer:

c) protons

Explanation:

inn [45]2 years ago

3 0

Answer:

C: PROTONS

Explanation:

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Considering the temperature vs. time graph below, how does the temperature at the beginning of a change of state

Cloud [144]

Answer:

The temperature is always lower.

Explanation:

The temperature is always lower at the end of the state as compared to beginning of the state. We can see in the given data, the temperature is higher at the beginning i. e. 140 degree Celsius but with the passage of time, the temperature of a state decreases constantly and the temperature at the end is lower i. e. 20 degree Celsius. So we can conclude that the temperature is always lower.

6 0

3 years ago

Read 2 more answers

When you mix copper sulphate solution and steel wool, what is the chemical property that can be observed.

bazaltina [42]

Answer:

Explanation:

depending on the activity series there will probably be a single replacement reaction possibly heat or color change and the copper precipitate out of solution

6 0

2 years ago

What compound is formed when methyloxirane (1,2-epoxypropane) is reacted with ethylmagnesium bromide followed by treatment with

Pavlova-9 [17]

Answer:

Pentan-2-ol

Explanation:

On this reaction, we have a Grignard reagent (ethylmagnesium bromide), therefore we will have the production of a carbanion (step 1). Then this carbanion can attack the least substituted carbon in the epoxide in this case carbon 1 (step 2). In this step, the epoxide is open and a negative charge is generated in the oxygen. The next step, is the treatment with aqueous acid, when we add acid the hydronium ion ( $H^+$ ) would be produced, so in the reaction mechanism, we can put the hydronium ion. This ion would be attacked by the negative charge produced in the second step to produce the final molecule: "Pentan-2-ol".