3 years ago

Which are bundles of cells in the lungs that take in oxygen?

Chemistry

1 answer:

taurus [48]3 years ago

8 0

Answer:

Which are bundles of cells in the lungs that take in oxygen? Alveoli.

Explanation:

Answer option A is correct. Hope you have a great day.

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Answer:

CaCO3 + H2SO4 ---> CaSO4 + H2O +CO2(gas)

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3 years ago

Which of these is NOT a colloid?

SVETLANKA909090 [29]

Answer:C

Explanation:

Mountain Dew soda is not a colloid

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3 years ago

Uranium-238 decays to lead-206 with a half-life of 4.5 x 109 yr. Determine how much uranium-238 decays in milligrams (to three s

Mamont248 [21]

Answer:

2.15 mg of uranium-238 decays

Explanation:

For decay of radioactive nuclide-

$N=N_{0}.(\frac{1}{2})^{\frac{t}{t_{\frac{1}{2}}}}$

where N is amount of radioactive nuclide after t time, $N_{0}$ is initial amount of radioactive nuclide and $t_{\frac{1}{2}}$ is half life of radioactive nuclide

Here $N_{0}=4.60 mg$ , $t=4.1\times 10^{9}yr$ and $t_{\frac{1}{2}}=4.5\times 10^{9}yr$

So, $N=(4.60mg)\times (\frac{1}{2})^{\frac{4.1\times 10^{9}}{4.5\times 10^{9}}}$

so, N = 2.446 mg

mass of uranium-238 decays = (4.60-2.446) mg = 2.15 mg

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3 years ago

A compound is formed by the reaction between magnesium and bromine. What is the chemical formula for this compound?

saul85 [17]

Answer:

Magnesium Bromide

Explanation:

MgBr₂

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2 years ago

Write a complete set of quantum numbers for the fifth electron added to a hydrogen ion (i.e., the fifth electron in any electron

ankoles [38]

N=
l=
m(l)=
m(s)=

start with H^+ (no electrons) , then adding 5 electrons will be 1s2 2s2 2p1
so for the 5th electron
n = 2
l = 1
ml = -1
ms = 1/2

5 0

3 years ago

Read 2 more answers