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finlep [7]
3 years ago
13

Who goes to K12 and if so what grade

Chemistry
2 answers:
olchik [2.2K]3 years ago
8 0

Answer:

I might next year with my cuz and nex year ima be in 8th

Explanation:

grandymaker [24]3 years ago
5 0

Answer:

Hey! I`m In K12. Currently in 7th, going into 8th next year. I have Mrs. Keefe and one of my teachers, what about y`all?

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How many miles are there in 20g of KClO3 (k=39 Cl=35.5 O=16)​
SashulF [63]
<h3>Answer:</h3>

0.144 moles

<h3>Explanation:</h3>
  • The relationship between mass of a compound, number of moles and molar mass of the compound is given by;
  • Number of moles = Mass ÷ Molar mass
  • Molar mass is equivalent to the relative formula mass of the compound that is calculated the atomic masses of the elements making the compound.

In this case;

Our compound, KClO3 will have a molar mass of;

= 39 + 35.5 + 4(16)

= 138.5 g/mol

Mass of KClO3 is 20 g

Therefore;

Number of moles = 20 g ÷ 138.5 g/mol

                            = 0.144 moles

Thus, the number of moles in 20 g of KClO3 is 0.144 moles

4 0
3 years ago
{Science Question} -Photosynthesis-
MAVERICK [17]
Look I am not even close to a genius in this type of stuff but the leaves help collect energy and sunlight for the plant to live off of during the winter. It basically needs them for processing and helping them with their food. Also food is stored in every pine needles mitochondrion or the powerhouse of their cell structure. In the mitochondrion their is things like chloropasts. These are like the energy or food for the cell. So when the tree cant draw nutrients from its roots or soil anymore all the excess things stored in the pine needles will help the tree survive. 
3 0
3 years ago
Read 2 more answers
What’s Nacl molar mass amount
Likurg_2 [28]

NaCl is made of Na and Cl

The molar mass of Na = 22.989 g/mol

The molar mass of Cl = 35.453 g/mol

Molar mass of NaCl = 22.989 + 35.453

= 58.44 g/mol

4 0
1 year ago
Calculate the amount of heat needed to boil 64.7 g of benzene (C6H6), beginning from a temperature of 41.9 C . Round your answer
JulsSmile [24]

Answer: The amount of heat needed is = 4.3kJ

Explanation:

Amount of heat H = M × C × ΔT

M= mass of benzene = 64.7g

C= specific heat capacity = 1.74J/gK

ΔT = T2-T1

Where T1 is initai temperature = 41.9C

T2 is the final temperature( boiling point of benzene) = 80.1C

H= 64.7×1.74×80.7

H= 4300J

H=4.3kJ

Therefore, the amount of heat needed is 4.3kJ

8 0
3 years ago
Arsenic has one stable isotope:75/33 As.
algol13
The answer is 42 neutrons
6 0
3 years ago
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