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ASHA 777 [7]
3 years ago
13

Which of the following characteristics do all unicellular organisms share?

Chemistry
1 answer:
noname [10]3 years ago
3 0

Answer:

B

Explanation:

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Solid sodium reacts violently with water, producing heat, hydrogen gas, and sodium hydroxide. How many molecules of hydrogen gas
Zinaida [17]

Answer: Number of molecules of hydrogen gas 6.32\times 10^{32}

Explanation:

2Na+2H_2O\rightarrow 2NaOH+H_2

Number of moles of sodium =\frac{\text{mass of sodium}}{\text{molar mass of sodium}}=\frac{48.7 g}{23 g/mol}=2.11mol

According to reaction , 2 moles of sodium produces 1 mole of hydrogen gas , then 2.11 mol of sodium will= \frac{1}{2}\times 2.11 mol of hydrogen gas that is 1.05 moles of hydrogen gas.

Number of molecules = N_A(\text{Avogadro number})\times moles of substance

Moles of hydrogen gas formed = 1.05 moles

Number of molecules of hydrogen gas = N_A\times moles of hydrogen gas

Number of molecules of hydrogen gas =6.022\times 10^{23} mole^{-1}\times 1.05 mole=6.32\times 10^{32}

8 0
2 years ago
When an atom of lithium loses an electron the atom becomes a
Ymorist [56]
Positive ion with a radius smaller than the radius of the atom
5 0
3 years ago
Read 2 more answers
What is the element for Trifluoroborane
Harlamova29_29 [7]

<span>Ethoxyethane; trifluoroborane; BF3.Et2O; Boron trifluoride ethyl ether; Boron trifluoride diethyl ether; Boron trifluoride-diethyl ether; Boron 

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7 0
3 years ago
How many moles are present in 25.0 grams of potassium permanganate, KMnO,? ​
poizon [28]

Answer: 0.158

Explanation:

7 0
3 years ago
Ammonia, NH3, is a typical ingredient in household cleaners. It is produced through a combination reaction involving N2(g) and H
GalinKa [24]
The balanced chemical reaction is:

N2 + 3H2 = 2NH3

We are given the amount of hydrogen gas to be used in the reaction. This will be the starting point of the calculations.

24.0 mol H2 (2 mol NH3 / 3 mol H2 ) = 16 mol NH3

Therefore, ammonia produced from the reaction given is 16 moles.
3 0
3 years ago
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