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Nutka1998 [239]
3 years ago
14

When cleaning immersion oil from a 100X lens, what should be used?

Chemistry
1 answer:
jeka943 years ago
6 0

Answer: wipe it with a kimwipe

Explanation:

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(04.04 MC)<br> Which table best shows the impacts resulting from human activity? (6 points)
hodyreva [135]

Answer:

B

Explanation:

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3 years ago
Sean drew this diagram and labeled an unknown gas as gas A. Which gas does A represent?
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Gas A is Carbon Dioxide
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4 years ago
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Calculate the number of CO2 molecules in 1.5 moles
sineoko [7]

n =  \frac{n1 }{l}
n = number of moles
n1= number of molecules
l = avagadro constant
1.5 =  \frac{n1}{6.022 \times  {10}^{23} }
now find n1
6 0
3 years ago
A glass flask of volume 400cm is just filled with mercury at 0 degree ​
3241004551 [841]

<em>A glass flask of volume 400 cm³ is just filled with mercury at 0°C. How much mercury will  overflow when the temperature of the system rises to 80°C.​</em>

<em />

The volume of mercury that overflow is 5.376 cm³

<h3>Further explanation</h3>

Given

volume of glass = 400 cm³

Δt=80 °C - 0 °C = 80

Required

overflow volume

Solution

With an increase in the temperature of the substance, objects can expand. This expansion includes volume expansion.

Can be formulated

\tt V_t=V_o(1+\gamma.\Delta t)\\\\\Delta V=V_o.\gamma.\Delta t

Find volume expansion of glass and mercury

  • Glass(γ = 1.2.10⁻⁵ C⁻¹)

\tt \Delta V=400\times 1.2.10^{-5}.80=0.384~cm^3

  • Mercury(γ=1.8.10⁻⁴ C⁻¹)

\tt \Delta V=400\times 1.8.10^{-4}\times 80=5.76~cm^3

Overflow :

ΔV mercury - ΔV glass : 5.76-0.384 = 5.376 cm³

7 0
3 years ago
Which equation shows conservation of mass and energy for a reaction at 101.3 kpa and 298 k?
harkovskaia [24]

Answer is: a.2h2(g) + o2(g) 2h2o(g) + 483.6 kj.

Conservation of mass (mass is never lost or gained in chemical reactions), during chemical reaction no particles are created or destroyed, the atoms are rearranged from the reactants to the products.

The law of conservation of energy states that the total energy of an isolated system remains constant; energy can neither be created nor destroyed; it can only be transformed or transferred from one form to another.

Balanced chemical reaction: 2H₂ + O₂ → 2H₂O ΔH = 483.6 kJ.

There are four hydrogen atoms and two oxygen atoms on both side of balanced chemical reaction.

3 0
3 years ago
Read 2 more answers
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