Answer:
Cells can only be formed by division of pre-existing cells. [Students should be aware that the 64 codons in the genetic code have the same meanings in nearly all organisms, but that there are some minor variations that are likely to have accrued since the common origin of life on Earth
Explanation:
Answer:
two atoms share 1 pair of valenece electrons
Explanation:
because double bond is created when each of two atoms share 2 valenece electrons (1 pair of electrons = 2 electrons)
Answer:
0.868M Cu⁺
Explanation:
The reaction is:
KMnO₄ + 5Cu⁺ + 8H⁺ → 5Cu²⁺ + Mn²⁺ + K⁺ + 4H₂O
<em>Where 1 mol of KMnO₄ reacts with 5 moles of Cu⁺</em>
<em />
3.30x10⁻²L of 0.132M KMnO₄ are:
3.30x10⁻²L × (0.132mol KMnO₄ / L) = <em>4.356x10⁻³mol KMnO₄</em>
As 1 mol reacts with 5 moles of Cu⁺, moles of Cu⁺ are:
4.356x10⁻³mol KMnO₄ × (5mol Cu⁺ / 1mol KMnO₄) = <em>0.02178moles Cu⁺</em>
As these moles are in 2.51x10⁻²L, the starting concentration of the Cu⁺ solution is:
<em>0.02178moles Cu⁺ / </em>2.51x10⁻²L = <em>0.868M Cu⁺</em>
B
1 mile=4 poles
if 5 poles pass by than she´s going around 1.25 miles per min
rounded up = 1.3 mil/min
Answer:
(A) 2.7*10^-8, (B)3.56*10^2, (C)4.78*10^4 (D) 9.6*10^-2
Explanation:
Scientific notation is a system that allows you to express very large or very small numbers by multiplying them by multiples of 10 with positive or negative exponents