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ElenaW [278]
3 years ago
9

Plpwkejnrhbgvjdhebr 15 points!

Chemistry
2 answers:
Tanzania [10]3 years ago
7 0

Answer: the answer is b

Explanation:

Alex73 [517]3 years ago
7 0
Water and carbohydrates probably sorry if I get it wrong
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What are the effects of global warming?​
svp [43]

the effects are: temperature rises, water shortages, and increased fire threats

7 0
3 years ago
Calculate the mass of Octane needed to release 6.20 mol Co2
n200080 [17]
The combustion reaction of octane is as follow,

                           C₈H₁₈  +  25/2 O₂     →     8 CO₂  +  9 H₂O

According to balance equation,

8 moles of CO₂ are released when  =  114.23 g (1 mole) Octane is reacted

So,

      6.20 moles of CO₂ will release when  =  X g of Octane is reacted

Solving for X,
                                     X  =  (114.23 g × 6.20 mol) ÷ 8 mol

                                     X  =  88.52 g of Octane
Result:
           88.52 g of Octane is needed to release 6.20 mol CO₂.
8 0
3 years ago
Of protons, neutrons and electrons which of these can never change an atom during an ordinary chemical or physical change. Expla
hjlf

Answer:

protons

Explanation:

electron number changes when the atom reacts with another atom to gain a full octet

neutron number changes when it goes through radioactive decay

but proton number never changes

6 0
4 years ago
Make a general statement about the reactivity of the metals in this experiment.
Gala2k [10]
Transition metals seem to have fairly even levels of reactivity though it seems they to react more with bases than acids. If I didn’t know from the lessons, I would say alkali and alkaline earth metals weren’t very reactive. 
 
(That's my answer when I did a lab about the reaction of metals for chemistry at least.)

3 0
3 years ago
Evaporation of water becomes rapid if humidity in air is?
tankabanditka [31]

Answer:

Low.......................

8 0
2 years ago
Read 2 more answers
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