Chemistry, 17.12.2020 17:30 Delgadojacky0206
Which of the following is the most accurate description of all known spaces?
A. The galaxy contains thousands of universes, and each universe contains millions of stars.
B. The universe contains hundreds of galaxies, and each galaxy contains thousands of stars.
C. The galaxy contains hundreds of universes, and each universe contains thousands of stars.
D. The universe contains billions of galaxies, and each galaxy contains billions of stars.
Answers: 2
Chemistry, 21.06.2019 23:00
A100-watt light bulb radiates energy at a rate of 100 j/s. (the watt, a unit of power or energy over time, is defined as 1 j/s.) if all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second?
Answers: 1
Chemistry, 22.06.2019 21:50
If e is the symbol for an element, which two of the following symbols represent isotopes of the same element? 1. e2. e3. ea.1 and 2c.1 and 4b.3 and 4d.2 and 3
Answers: 2
Chemistry, 23.06.2019 00:00
Mercury turns to a vapor at 629.88 k. how much heat is lost when 75.0 g of mercury vapor at 650 k condenses to a liquid at 297 k?
Answers: 1
Which of the following is the most accurate description of all known spaces?
A. The galaxy contains...
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