Chemistry, 24.10.2021 17:50, 87haymaker

What is the % m/m concentration for a solution that contains 100.0 g of water and 3.45 g of solute?

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answered: Guest

first let us lay out the formula for potential

and kinetic energy:

pe = mgh

ke = (mv^2)/2

where: m=mass, v=velocity, g=gravitational

acceleration, h=height

calculating for mass using the known values of

pe:

340j = m (9.81 m/s^2) (50ft) (1m/3.28ft)

m = 2.27 kg

the law of conservation of energy states that

energy is neither created nor destroyed. therefore, the change in kinetic

energy from 50 ft to 35 ft would be equal to the change in potential energy

from 50 ft to 35 ft. however it would be opposite in signs since one is losing

while other is gaining.

ke(35ft) – ke(50ft) = - [ pe(35ft) – pe(50ft]

ke(50ft) = 0 since the brick is initially at rest

ke(35ft) = 340j - 2.27kg (9.81 m/s^2) (35ft)

(1m/3.28 ft)

ke(35ft)

= 102.38 j

answered: Guest

Electron equations of the given changes are as follow,a) cu → cu⁺² + 2e⁻b) mg⁺² + 2 e⁻ → mgc) cl⁻ → cl + 1e⁻d) s + 2 e⁻ → s²⁻e) o²⁻ → o + 2 e⁻f) p + 3 e⁻ → p³⁻g) fe²⁺ → fe³⁺ + 1 e⁻h) s²⁻ → s⁴⁺ + 6 e⁻

answered: Guest

Um ask a different problem if you want me to answer

answered: Guest

a) adding base pairs

c) unwinding the helix

there are possible two correct answers for this question.

dna polymerase doesn’t add base pairs, it adds single nucleotides which are complentar to coding strand . also dna polymerase can’t unwind the dna helix alone. dna helicase can do that, using energy derived from atp hydrolysis.

dna polymerase are enzymes that synthesize dna molecules from deoxyribonucleotides. these enzymes replicate the dna strand and create two identical dna strands from a single original dna molecule. some of dna polymerases have a function of correcting erros which are made during replication and this process is called proofreading. if the dna polymerase detects that incorrectly paired nucleotide has been added, it will remove and replace the wrong nucleotide.

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