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antiseptic1488 [7]
3 years ago
10

Plz help, science open answer

Chemistry
1 answer:
aleksandrvk [35]3 years ago
7 0
Scientists are cool
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9. Calculate the approximate number of atoms in a bacterium. Assume the average mass of an atom in the bacterium is 10 times the
Natali5045456 [20]

The question is incomplete, the complete question is :

Calculate the approximate number of atoms in a bacterium. Assume the average mass of an atom in the bacterium is 10 times the mass of a hydrogen atom.(Hint the mass of hydrogen atom is on order of 10^{-27} kg and the mass of bacterium is on order of 10^{-15} kg

Answer:

The total numbers of atom in bacterium are 10^{12}.

Explanation:

Mass of hydrogen atom, m= 10^{-27} kg

Mass of bacterium , M= 10^{-15} kg

Mass of bacterium atom =m'

Given ; m' =10\times m

m'=10\times 10^{-27} kg=10^{-26} kg

let the number of atoms in bacterium be N

m'\times N=M

N=\frac{M}{m'}=\frac{10^{-15} kg}{10^{-27} kg}=10^{12}

The total numbers of atom in bacterium are 10^{12}.

5 0
3 years ago
molecules that resemble fats but contain phosphate functional groups are called: a. steroids. b. polypeptides. c. phospholipids.
Rom4ik [11]
The answer is C. Phospholipids because Lipids mean "Fat"
8 0
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A rigid plastic container holds 1.00 l methane gas at 660 torr pressure when the temperature is 22.0 degrees Celsius. How much p
igor_vitrenko [27]
 <span>PV/T = P'V'/T' 
660 x 1.00/295.2 = P' x 1.00/317.8 
P'=710.5 torr</span>
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3 years ago
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What does condensation mean in the water cycle?
tester [92]
Condensation<span> is the process by which </span>water<span> vapor in the air is changed into liquid </span>water<span>. </span>Condensation<span> is crucial to the </span>water cycle<span> because it is responsible for the formation of clouds. ... </span>Condensation<span> is the opposite of evaporation.</span>
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Find the percent of water in Zn3(PO4)2 x 7H2O
Andreas93 [3]

Answer:

24.66%

Explanation:

To find the percent of water (H2O) in the following compound: Zn3(PO4)2. 7H2O

The atomic mass of the elements are as follows:

Zn = 65g/mol

P = 31g/mol

O = 16g/mol

H = 1g/mol

Hence, molar mass of the compound is as follows:

65(3) + {31 + 16(4)} 2 + 7{1(2) + 16}

195 + 95(2) + 7(18)

195 + 190 + 126

511g/mol

Molar mass of 7H2O

= 7(18)

= 126g/mol

Hence, the percent of H2O in the compound is:

Molar Mass of 7H2O/molar mass of compound × 100

= 126/511 × 100

= 0.2466 × 100

= 24.66%

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3 years ago
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