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aliya0001 [1]
3 years ago
10

1S Called A simple machine that has a disc with a grooved rim to wind up asing is called When a fixed pulley and a movable nugnk

cmm vnghldley​
Chemistry
2 answers:
EastWind [94]3 years ago
7 0

Answer:

the question isn't enlisted here...

maxonik [38]3 years ago
3 0

what is the question??

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What is approximate half-life of carbon-14 ?
Alja [10]
The correct answer is C
5 0
4 years ago
Caffeine has the molecular formula, C8H10N4O2. What is the percent composition of caffeine?
Debora [2.8K]

Answer:

b) 49.48% C, 5.19% H, 28.85% N, and 16.48% O

Explanation:

we find the mass for each element in one mole by multiplying the number of atoms in one molecule with the atomic mass

mC=8Ac=8*12=96g

mH=10AH=10*1=10g

mN=4AN=4*14=56g

mO=2AO=2*16=32g

by adding the masses together we find the molar mass of the molecule

M=mC+nH+mN+mO=96+10+56+32=194g/mole

we apply the rule of threes to find the percentage of each element

194g..96gC..10gH...56gN....32gO

100g....a...........b...........c.............d

a=(100*96)/194=49.48%C

b=(100*10)/194=5.19%H

c=(100*56)/194=28.85%N

d=(100*32)/194=16.48%O

3 0
3 years ago
What is the type of hybridization of each carbon in prop - 2- one ?​
KATRIN_1 [288]

Explanation:

  1. IUPAC name: porpane-2-one
  2. Other name: Acetone
  3. Functional group: Ketone
  4. Longest C-chain: 3
  5. position of Functional group: 2nd-C
  6. molecular formula: C₃H₆O
  7. molecular mass: 58 g/mol
  8. solubility: soluble in water (H-bond)
  9. boiling point: High as compared to haloalkanes
  10. Structure: O

||

CH₃–C–CH₃

11. Hybridisation:

  • 1-C: sp³
  • 2-C: sp²
  • 3-C: sp³
5 0
3 years ago
Question 1
podryga [215]

actually it is 5% of 100 is 5

Therefore, 5% of 500 is 5 x 5 = 25g

6 0
3 years ago
What kind of solid is crystalline boron
Ulleksa [173]

Answer:

It is a network solid, a lattice of many covalent bonds (like diamond, except that it is black rather than transparent).

Explanation:

7 0
3 years ago
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