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Leviafan [203]
2 years ago
13

Why are space probes and other unmanned crafts more commonly used for space investigations than space crafts with crews of astro

nauts?
Select one:

Unmanned crafts don't have to support human life

Manned missions are risky to human life

All of these are correct

Space probes are less expensive to launch
Chemistry
1 answer:
Crank2 years ago
4 0
All of these are correct.
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Complete the chemical equations and balance them
Aleks04 [339]

Answer:

KCl+H2O

Na3PO+H2O

CaCO3+H2O

4 0
2 years ago
What would be the volume of a sample of Uranium with a mass of 1800g?
Yuki888 [10]

Answer:

V = 94.24 cm3

Explanation:

Uranium metal has a very high density of 19.1 g/cm3.

d = 19.1 g/cm3

m = 1800 g

m = V × d

=> V = m/d = 1800/19.1 = 94.24 cm3

5 0
3 years ago
Which of the following determines the type of tree species found in a temperate broadleaf forest? (Select all that apply.)
Sunny_sXe [5.5K]

Answer: A B C

Explanation: chapter 34-45 pdf

3 0
2 years ago
Do bromide ions accept or donate an electron in redox reactions? how do you know?​
Vaselesa [24]

Bromide ions donates an electron in redox reactions.

<u>Explanation:</u>

  • In these redox reactions, the halide ions like bromide donates a pair of electrons and acts as a reducing agents, but itself gets oxidized to bromine.
  • In this process, the oxidation state of bromide ion is increased from -1 to 0 oxidation state, that is Br⁻ (-1) to Br₂ (0), thus reduces the compound and oxidizes by itself.
  • Bromide ion is a strong reducing agent, thereby reduces sulfuric acid which changes to sulfur di oxide, but this doesn't happen in the case of chloride and fluoride ions as they are not having that much capacity like bromide and iodide ions.
4 0
2 years ago
For how many seconds each respiration occurs?
skelet666 [1.2K]
Around two seconds for an inhalation and three seconds exhalation
5 0
3 years ago
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