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wariber [46]
3 years ago
13

How might you cause a saturated solution of lithium sulfate to form a precipitate?

Chemistry
1 answer:
erastova [34]3 years ago
6 0

Add barium chloride. Reaction equation as shown:

Li2SO4(aq) + BaCl2(aq) → BaSO4(s) + 2LiCl(aq)

Reaction will result in a white precipitate, making the solution look milky.

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Who was the first scientist to develop a theory of the atom
Olegator [25]

Democritus, a Greek philosopher.

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3 years ago
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Why would it be more comfortable to walk on hot beach sand in flip-flops
Eddi Din [679]

Answer:

D. Thermal conduction is blocked by the flip-flops.

Explanation:

Convection is a process of heat transfer which involves fluids( liquid or gas). This however rules convection out of the answer.

Radiation involves heat transfer from the sun to bodies on earth.

Conduction involves heat transfer between two solid bodies. Hot beach sand and flip-flops are solid bodies which validates thermal(heat) conduction.

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3 years ago
6. A sheet of metal is 2 cm wide, 10 cm tall, and 15 cm long. It was 4 grams. What is the
Flauer [41]

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0.013g/cm^3

Explanation:

density= mass÷volume

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Which pair of bars represents the French and English populations in 1700?​
kondaur [170]

Answer:

Explanation:

The music of France reflects a diverse array of styles. In the field of classical music, France has produced several prominent romantic composers, while folk and popular music have seen the rise of the chanson and cabaret style. The earliest known sound recording device in the world, the phonautograph, was patented in France by Édouard-Léon Scott de Martinville in 1857. France is also the 5th largest market by value in the world, and its music industry has produced many internationally renowned artists, especially in the nouvelle chanson and electronic music.

8 0
2 years ago
A long (i.e., L >> D) stainless steel rod 6.4 mm in diameter is initially at a uniform temperature of 25°C and is suddenly
sp2606 [1]

Answer:

68.4 seconds

Explanation:

Assume that the temperature of the stainless steel rod will reach 120 C in t seconds. According to lumped – capacity analysis use the following expression to determine the value of t

T- T∞/T₀ – T∞ = e^-(hA/ρcV)t, where T is the required temperature, T∞ is the surface temperature, T₀ is initial temperature of the rod, h is the convection heat transfer coefficient, A is surface are, ρ is density of stainless steel, c is specific head and V is the volume of the rod.

Area of rod = π x d x L and Volume of rod is (π/4) x d² L

T - T∞/T₀ – T∞ = e^-(h x π x d x L/ρc(π/4 x d² x L))t

T - T∞/T₀ – T∞ = e^-(4h/(ρ x c x d))t, d is the radius of the log and L is the length of rod

<em>The value of c and ρ for stainless steel can be obtained from the table of properties of metals</em>

<u>Substitute 120 C for T, 150 C for T∞, 25 C for T₀, 7817 kg/m³ for ρ, 460 J/kg.C for c, 6.4 x 10⁻³ m for d, 120 W/m².C for h in the above equation</u>

T - T∞/T₀ – T∞ = e^-(4h/ρ x c x d))t

120 – 150/25 – 150 = e ^ -(4 x 120/7817 x 460 x 6.4 x 10⁻³)t

0.24 = e^-0.02086t

<u>Take natural log on both sides</u>

㏑0.24 = -0.02086t

T = 68.4 seconds

Thus, the temperature of the stainless steel will reach 120 C in 68.4s

5 0
3 years ago
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