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Ainat [17]
3 years ago
11

Compare the two types of optical telescopes

Chemistry
1 answer:
Jet001 [13]3 years ago
3 0

Answer: Reflectors use a mirror to collect the light, whilst refractors use a lens while, Refractor telescopes require a large lens at the front to direct the incoming light to the lens.

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If you have 6.02x10^23 molecules of trisulfur monoxide, how many grams would it weigh?
Cloud [144]

Answer:

112.18 g.

Explanation:

you're using stoichiometry to find the mass of the compound S₃O.

3 0
3 years ago
Radon-222 is an alpha emitter with a half life of 3.82 days.
rewona [7]

The daughter isotope (a decay product): Polonium (Po)

<h3>Further explanation</h3>

Radioactivity is the process of unstable isotopes to stable isotopes by decay, by emitting certain particles,  

  • alpha α particles ₂He⁴
  • beta β ₋₁e⁰ particles
  • gamma particles γ
  • positron particles ₁e⁰

Radon-222 emits alpha α particles ₂He⁴  , so the atomic number decreases by 2, mass number decreases by 4

Reaction

\tt _{86}^{222}Rn\Rightarrow _{84}^{218}+_2^4He

1. The mass number of the daughter isotope = 218

2 and 3. If we look at the periodic system, the element with atomic number 84 is Polonium (Po)

4 0
3 years ago
Which element does the following box notation represent:
vazorg [7]

Answer:

D. yan trust meManiwala kalang

8 0
3 years ago
True or False:
Juli2301 [7.4K]

Answer:

Explanation:

From the work of Krogh in 1918 until the present time, a very wide range of values for oxygen diffusion coefficients has been reported1–5 ranging from 1.1 × 10−4 to 4 × 10−8 cm2 sec−1.

7 0
3 years ago
Britta traveled 1250 km on her road trip and used 209 L of gasoline, filling her tank atan average of 1.14 euros per liter. Pier
icang [17]

Answer:

  • Britta paid more per kilometer driven

Explanation:

<u>1) Britta:</u>

  • Distance traveled: 1,250 Km
  • Gasoline used: 209 liter
  • Gasoline price: 1.23 euros / liter

Cost per km = total cost of gasoline / distance traveled

Cost per km = gasoline used × gasoline price / distance traveled

Cost per km = 209 liter × 1.14 (euro / liter) / 1,250 km =  0.19 euro / km

<u>2) Pierce:</u>

  • Distance traveled: 1,405 km
  • Gasoline used: 175 liter
  • Gasoline price = 1.23 euros / liter

Cost per km = 175 liter × 1.23 (euro / liter) / 1,405 km =  0.15 euro / km

<u>3) Comparison:</u>

  • 0.19 > 0.15 ⇒ Britta paid more per kilometer driven
4 0
4 years ago
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