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3 years ago

Please help I’ll mark brainliest!

Chemistry

2 answers:

IRISSAK [1]3 years ago

8 0

I believe you got the correct answer D.

I actually looked up the problem on quizlet. It reads, “because each element has a different set of emission colors from the emission spectrum. They have different energy level spacing and when the electrons get excited, they go to different energy levels because of the different spacing.”

If u want to view where I got this answer from, go to quizlet and type up Flame Test Lab. There should be 8 terms in the set.

Anyways, I hope that this helps! Have a wonderful day :)

Anni [7]3 years ago

6 0

Answer:

D because excited electrons fall back.....

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Label each of the descriptions below as theoretical

anzhelika [568]

Answer:

Before performing chemical reactions, it is helpful to know how much product will be produced with given quantities of reactants. This is known as the theoretical yield. This is a strategy to use when calculating the theoretical yield of a chemical reaction. The same strategy can be applied to determine the amount of each reagent needed to produce a desired amount of product.

Explanation:

Reagent Examples

Reagents may be compounds or mixtures. In organic chemistry, most are small organic molecules or inorganic compounds. Examples of reagents include Grignard reagent, Tollens' reagent, Fehling's reagent, Collins reagent, and Fenton's reagent. However, a substance may be used as a reagent without having the word in its name.

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3 years ago

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Which net ionic equation would match this description of a chemical reaction: When a

krok68 [10]

Answer:

$3Mg^{2+}(aq.)+2PO_{4}^{3-}(aq.)\rightarrow Mg_{3}(PO_{4})_{2}(s)$

Explanation:

$Mg(NO_{3})_{2}$ , $Na_{3}PO_{4}$ are strong electrolytes. Hence they are fully ionized in aqueous solution.

$Mg_{3}(PO_{4})_{2}$ is a sparingly soluble salt. Hence it remains undissociated in aqueous solution.

So, total ionic equation:

$3Mg^{2+}(aq.)+6NO_{3}^{-}(aq.)+6Na^{+}(aq.)+2PO_{4}^{3-}(aq.)\rightarrow Mg_{3}(PO_{4})_{2}(s)+6Na^{+}(aq.)+6NO_{3}^{-}(aq.)$

Net ionic equation is written by omitting spectator ions from total ionic equation.

Here, $Na^{+}$ and $NO_{3}^{-}$ ions are spectator ions as they remain present on both side of total ionic equation.

So, net ionic equation:

$3Mg^{2+}(aq.)+2PO_{4}^{3-}(aq.)\rightarrow Mg_{3}(PO_{4})_{2}(s)$

So, option (d) is correct.

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3 years ago

What role does sea grass play in this food chain?

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3 years ago

HELP ASAP

evablogger [386]

Answer:

b i think but I'm not 100%

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3 years ago

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This is for my Science assignment: A molecule is made up of at least (blank) different atoms. Fill in the blank, please. Best an

Ierofanga [76]

Answer:

2 differet atoms.

Explanation:

Molecule: group of two or more atoms held together by chemical bonds. So, minimum 2 atoms are required to form a molecule.

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