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cricket20 [7]
3 years ago
11

Please I have a D in chem and grades close tomorrow ;-;

Chemistry
1 answer:
alekssr [168]3 years ago
3 0
HCO3^1- because sodium has a 1+ charge
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What kind of reaction does luminol go through?
vivado [14]

Answer: This reaction is called as Chemiluminescence. A type of reaction in which light is produced due to chemical reaction. While in case of Phosphorescence and Fluorescence light is emitted due to absorption of photons.

Explanation: i looked the answer up but your welcomee ❤

7 0
3 years ago
Anna is working on finding the patterns of demographic variation within North America’s populations. What is Anna working on?
nata0808 [166]

Answer:

I am pretty sure that I know what Anna is working on, given that she wants to find the patterns of demographic variation, is population structure.  This structure deals with variations in age, gender, and other qualities of a population, and I believe that is what she wants to find out. So the answer to your question would be that population structures are the patterns of demographic variation.

6 0
3 years ago
A mixture of 15.0 g of aluminum sulfide and 10.0 g of water reacts according to the following equation:
masha68 [24]

(a) The mass of hydrogen sulfide produced in the reaction is 9.44 g.

(b) Water is the limiting reagent in the given reaction.

<h3>Mass of hydrogen sulfide produced</h3>

Al2S3 + 6H2O ---> 2Al(OH)3 + 3H2S

mass of water in the reaction = 6(18 g/mol) = 108 g/mol

mass of hydrogen sulfide in the reaction: = 3(34) = 102 g/mol

108 g/mol of H2O ------- > 102 g/mol of H2S

10 of H2O -----------> ?

= 9.44 g

Aluminum sulfide will be completely consumed by the reaction while some fraction of water will remain. Thus, water is the limiting reagent in the given reaction.

Learn more about limiting reagents here: brainly.com/question/26905271

#SPJ1

8 0
2 years ago
Which transition could represent an atom that emits a photon with 10.2 eVeV of energy?
AlekseyPX
There is a co2 contotution
7 0
3 years ago
When light energy excites electrons in photosystem II, where do the electrons to replace them come from?
Artyom0805 [142]
Oh we have just done this in biology recently... photolysis occurs where it splits apart water molecules to make electrons and hydrogen ions (the H+ is used to reduce NaDP later on) and also O₂ is made as a by product

basically this is the equation 2H₂O⇒4e⁻ + 4H⁺  where the electrons replace the lost ones in chlorophyll

hope this helped :)
3 0
4 years ago
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