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11111nata11111 [884]
3 years ago
10

How much mass does 0.1 mole of neon contain? A) 26.018 g B) 2.02 g C) 2.0 g D) 2 g

Chemistry
2 answers:
nignag [31]3 years ago
7 0
2 grams is the answer

Naddika [18.5K]3 years ago
4 0

D) 2 g is the answer.

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2H2S + 3O2 → 2SO2 + 2H2O<br><br><br>1. For every 10.0 g of H2S how many moles of SO2 are formed?
Veseljchak [2.6K]

Answer:10

Explanation:

7 0
2 years ago
"A sphere of radius 0.50 m, temperature 27oC, and emissivity 0.85 is located in an environment of temperature 77oC. What is the
Aleksandr-060686 [28]

Explanation:

It is known that formula for area of a sphere is as follows.

                     A = 4 \pi r^{2}

                        = 4 \times 3.14 \times (0.50 m)^{2}

                        = 3.14 m^{2}

    T_{a} = (27 + 273.15) K = 300.15 K

          T = (77 + 273.15) K = 350.15 K

Formula to calculate the net charge is as follows.

             Q = esA(T^{4} - T^{4}_{a})

where,    e = emissivity = 0.85

               s = stefan-boltzmann constant = 5.6703 \times 10^{-8} Wm^{-2} K^{-4}

                A = surface area

Hence, putting the given values into the above formula as follows.

                 Q = esA(T^{4} - T^{4}_{a})

                     = 0.85 \times 5.6703 \times 10^{-8} Wm^{-2} K^{-4} \times 3.14 \times ((350.15)^{4} - (300.15)^{4})

                     = 1046.63 W

Therefore, we can conclude that the net flow of energy transferred to the environment in 1 second is 1046.63 W.

8 0
3 years ago
Wind energy is a renewable natural resource<br> True <br> False
KIM [24]

this is true, wind energy is a renewable natural resource c:

3 0
3 years ago
Indicate whether the following are signs or symptoms:
sineoko [7]

Answer:

A fever is a sympton. A headache is a sign. increase pulse rate is a sign. low blood pressure is a sign. feeling of dizzinies is a symptom. stomache is a symptom.

Explanation:

I learned these in class before and they make the most sense.

8 0
2 years ago
A buffer solution contains 0.486 M NaHCO3 and 0.345 M Na2CO3. If 0.0321 moles of sodium hydroxide are added to 150 mL of this bu
Molodets [167]

Answer:

pH = 10.51

Explanation:

The buffer of HCO₃⁻ + CO₃²⁻ has a pka of 10.2

HCO₃⁻ ⇄ H⁺ + CO₃²⁻

0,150L of these substances are:

0,150L × 0,486M NaHCO₃ = <em>0.0729mol NaHCO₃</em>

0,150L × 0,345M Na₂CO₃ = <em>0.05175mol Na₂CO₃</em>

NaOH reacts with HCO₃⁻ producing CO₃²⁻, thus:

NaOH + HCO₃⁻ → CO₃²⁻ + H₂O + Na⁺

0.0321 moles of NaOH produce the same moles of CO₃²⁻ and consume HCO₃⁻. Moles of these species are:

CO₃²⁻: 0.05175mol + 0.0321mol: <em>0.08385mol</em>

HCO₃⁻: 0.0729mol - 0.0321 mol: <em>0.0408mol</em>

<em />

Using Henderson-Hasselbalch formula:

pH = pka + log [Base] / [Acid]

pH = 10.2 + log 0.08385mol / 0.0408mol

<em>pH = 10.51</em>

<em />

I hope it helps!

7 0
3 years ago
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