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Mars2501
4 months ago
8

A hardware salesman measures the mass of a box containing

Chemistry
2 answers:
lorasvet [2.7K]4 months ago
8 0
Step 1: To find the mass of a single washer, divide the total measured mass by the number of washers \frac{0.4168}{1000} =0.0004168\ Kg 0.0004168kg=4.168*10^{-4} kg. Step 2: Convert kilograms to milligrams knowing 1 kg=1*10^{6} mg; thus 4.168*10^{-4}*10^{6} =4.168*10^{2}mg=416.8 mg resulting in the final answer 416.8 mg.
Anarel [2.9K]4 months ago
7 0
Given the box with 1000 washers weighs 0.4168 kg, divide this mass by 1000 to get the mass per washer, then convert to milligrams using 1 kg = 10^6 mg. The calculation is 0.4168 kg ÷ 1000 × 10^6 mg/kg = 4168 mg.
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A chemist is studying the following reaction: NO + NO2 ⇌ N2O3. She places a mixture of NO and NO2 in a sealed container and meas
castortr0y [3046]

Answer:

The forward reaction will keep occurring until all NO or all NO₂ is consumed.

Clarification:

  • According to Le Châtelier's principle, when a system at equilibrium experiences a disturbance from an outside source, the system will adjust to counteract this disturbance and restore equilibrium.

  • Thus, removing the product (N₂O₃) from the system effectively lowers the product concentration, prompting the reaction to shift forward and generate additional product in order to alleviate the strain caused by the removal of N₂O₃.

  • Consequently, the reaction will proceed forward until all of either NO or NO₂ is depleted.

5 0
3 months ago
How many moles of O2 are produced when 0.500mol of KO2 reacts in this fashion?
lions [2927]
I believe you mean KO2 reacting with H2O. The reaction is 4KO2+2H2O->4KOH +3O2. The mole ratio O2:KO2 is 3:4. Thus moles of O2 produced = 0.500/4*3 = 0.375 mol.
6 0
2 months ago
Oxygen at 150 k and 41.64 atm has a tabulated specific volume of 4.684 cm3/g and a specific internal energy of 1706 j/mol. calcu
lions [2927]

Specific enthalpy is defined as the overall energy in a system attributed to its temperature and pressure, measured per unit mass. It is essential in thermodynamic calculations when one needs to determine the energy for a specific unit mass of a component.

Specific enthalpy can be computed with the equation:

H = U + PV

For this example, the specific volume is 4.684 cm³/g or 149.888 cm³/g moles, which translates to 149.888 × 10⁻³ J/g moles.

The specific internal energy (U) is 1706 J/mol, and the pressure measured is 41.64.

Calculating gives us H = 1706 + 41.64 × 149.888 × 10⁻³ × 101.3 joules

= 2428 joules / mole


5 0
3 months ago
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