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Nata [24]
3 years ago
8

Which is a FALSE statement about the possible benefits of nanocars? A. They could work together to build really complex things.

B. They could increase the efficiency of building computer chips. C. They could increase the ability to build things from the top down. D. They could work as medical submarines searching the body for disease.
Chemistry
1 answer:
kondor19780726 [428]3 years ago
6 0
C, they could work together to make things from the top down. 
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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
3 years ago
Nonmetal halogen family atmoic mass 35
Anettt [7]

chlorine has the atomic mass of 35.5 and is a non metal in the halogen family

5 0
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What is the molarity of a NaCl solution containing 9.0<br> moles of NaCl in 3.0 L of solution?
ss7ja [257]

Answer:

3 M

Explanation:

Molarity equation: M = n/v

n = moles of solute

v = liters of solution

9 moles of NaCl / 3 L

9/3 = 3 M

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When an acid or vase is added to to water,
velikii [3]

Answer:

yes

Explanation:

3 0
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Does the size of an object<br> affect its rate of fall?
Vitek1552 [10]

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The acceleration of the object equals the gravitational acceleration. The mass, size, and shape of the object are not a factor in describing the motion of the object. So all objects, regardless of size or shape or weight, free fall with the same acceleration

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