Answer:
Humans have 23 pairs of chromosomes.
A trisomy is a chromosomal condition characterised by an additional chromosome.
A person with a trisomy has 47 chromosomes instead of 46.
Down syndrome, Edward syndrome and Patau syndrome are the most common forms of trisomy.
Explanation:
Answer:
a) Can be cut into tiny pieces - Physical Change
b) Fizzling occurs when placed water -Chemical Change
c) Light is emitted when burned -Chemical Change
d) Turns to ash -Chemical Change
Explanation:
Answer:
B
Explanation:
To calculate questions like this, you need to make use of the equation below:
ν = c / λ
ν is the frequency, c is the speed of light, and λ is the wavelength
ν = c / λ
2.45 • 10^9 Hz = (3•10^8 m/s)/(λ)
λ = 0.122 m = B
MC3H7COOC2H5: (12×6)+(1×12)+(16×2) = 116 g/mol
mC3H7COOH: (12×4)+(1×8)+(16×2) = 88 g/mol
88g....................................................116g
C3H7COOH + C2H5OH ---> C3H7COOC2H5 + H2O
7,55g..................................................X
X = (116×7,55)/88
X = 9,952g of ethyl butyrate
