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3 years ago

Animal cells do not have

Chemistry

2 answers:

Dennis_Churaev [7]3 years ago

7 0

Answer:

chloroplasts and central vacuoles

Explanation:

slamgirl [31]3 years ago

7 0

Answer:

Animal Cells don't have cell walls.

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Element X has two isotopes. If 72.0% of the element has an isotope mass of 84.9 atomic mass units, and 28.0% of the element has

bija089 [108]

<h2>Answer:</h2>

Average atomic mass of an element is the sum of the masses of its isotopes each multiplied by its natural abundance

$\footnotesize \longrightarrow \: \rm Average \: atomic \: mass = \dfrac{ \sum\limits \: \% age \: of \: each \: isotope \times Atomic \: mass }{100} \\$

$\footnotesize \longrightarrow \: \rm Average \: atomic \: mass = \dfrac{ 72 \times84.9 + 28 \times 87 }{100} \\$

$\footnotesize \longrightarrow \: \rm Average \: atomic \: mass = \dfrac{ 6112.8 + 2436 }{100} \\$

$\footnotesize \longrightarrow \: \rm Average \: atomic \: mass = \dfrac{ 8548.8 }{100} \\$

$\footnotesize \longrightarrow \: \bf Average \: atomic \: mass = 85.488 \: amu \\$

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2 years ago

State the differences between Transition metals and S-blocks metals<br>

Talja [164]

Answer:

There both different

Explanation:

There just different

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3 years ago

If you took a cross-section of soil from your backyard, what would be the correct order of soil layers from top to bottom? paren

AlladinOne [14]

humus, topsoil, subsoil, parent rock

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2 years ago

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The change of phase from a vapor to a liquid is called _____.

dolphi86 [110]

The change of phase from a vapor to a liquid is called condensation.
Hope this helps~

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3 years ago

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An electron has an uncertainty in its position of 471 pm .

olya-2409 [2.1K]

<u>Answer:</u>

$\Delta x . \Delta p \geq \frac{h}{4 \pi}$

∆x is the Uncertainty in the position of the particle

∆p is the Uncertainty in the momentum of the particle

$\Delta p=\frac{h}{4 \pi \times m \times \Delta x}$

$=\frac{6.626 \times 10^{-34} \mathrm{kgm}^{2} s^{-1}}{4 \times 3.14 \times 9.109 \times 10^{-31} \mathrm{kg} \times 471 \times 10^{-12} \mathrm{m}}$

$=\frac{6.626 \times 10^{-34} \mathrm{ms}^{-1}}{53887 \times 10^{-43}}$

$=1.23\times10^5 ms^{-1}$ is the answer

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3 years ago