Give atleast 5 differences in cell structures of plant and animal cells

Chemistry

1 answer:

Molodets [167]3 years ago

8 0

The shape, the cell wall, chlorophyll, the components of the nucleus, cytoplasm

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A certain second-order reaction (B→products) has a rate constant of 1.30×10−3 M−1⋅s−1 at 27 ∘C and an initial half-life of 224 s

soldier1979 [14.2K]

Answer:

$\large\boxed{\large\boxed{0.291M}}$

Explanation:

By definition one half-life is the time to reduce the initial concentration to half.

For a second order reaction the rate law equations are:

$\dfrac{d[B]}{dt}=-k[B]^2$

$\dfrac{1}{[B]}=\dfrac{1}{[B]_0}+kt$

The half-life equation is:

$t_{1/2}=\dfrac{1}{k[A]_0}$

Thus, substitute the rate constant $1.30\times 10^{-3}M^{-1}\cdot s^{-1}$ and the half-life time 224s to find [A]₀:

$224s=\dfrac{1}{1.30\times10^{-3}M^{-1}\cdot s^{-1}[A]_0}$

$[A]_o=0.291M$

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4 years ago

A mystery object has a density of .75; will it sink or float?

brilliants [131]

Answer:float

Explanation:

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3 years ago

A cup of gold colored metal beads was measured to have a mass 425 grams. By water displacement, the volume of the beads was calc

Butoxors [25]

If the volume of 425 grams was 48.0 cm³, simply divide

g/cm³ = 425 g/48 cm³ = 8.85 g/cm³

If using water in water displacement, 1 mL = 1 cm³

8.85 g/cm³ = 8.85 g/mL

This density is most closely aligned with that of B. Copper

Hope I helped!

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3 years ago

If enought heat was removed from water. What will it change into and why

Savatey [412]

If enought heat was removed by water, its will probably evaporate or turn into steam.

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4 years ago

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How many moles of sulfur will be needed to oxidize 3 moles of zinc to zinc sulfide

Ksenya-84 [330]

Answer : The number of moles of sulfur needed to oxidize will be, 3 moles

Solution : Given,