1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
bazaltina [42]
3 years ago
12

4. What is the rarest element that is natural to earth?

Chemistry
2 answers:
krek1111 [17]3 years ago
5 0
Astatine it’s also a chemical element
never [62]3 years ago
3 0

Answer:

Astatine

Explanation:

Astatine is a chemical element with the symbol At and atomic number 85. It is the rarest naturally occurring element in the Earth's crust, occurring only as the decay product of various heavier elements.

You might be interested in
A molecule has an empirical formula of ch, and its molar mass is known to be 26 g/mol. What is its molecular formula?.
Sonbull [250]

A molecule has an empirical formula of ch, and its molar mass is known to be 26 g/mol and the  molecular formula is C₂H₂ ethyne

Molecular formula of compound is (CH)n and the given molar mass is 26g/mol

Molar mass of (CH)n, C=12=n(12+1)=13n

So 13n and n=2

=13×2=26 and given molar mass is also 26g/mol

So here two carbon and two hydrogen so molecular formula is C₂H₂ and name is ethyne

Know more about molecular formula

brainly.com/question/28496692

#SPJ4

7 0
2 years ago
What do repeated trials in an experiment allow a scientist to do?
Oksana_A [137]

Answer:

Learn from their experiment and know the possible results from trial and error

8 0
3 years ago
A sample of gas occupying 350 mL at 25 C is cooled to -25 C. What volume will it occupy if the pressure is held constant?
leonid [27]

Answer:

I hac no ideasghjjbhnn

7 0
3 years ago
Determine the mass density, specific volume and specific weight of a liquid whose
irakobra [83]

the volume is 63 i hope it is

5 0
2 years ago
Which of the following sets of empirícal formula, molar mass, and molecular formula is correct?
skad [1K]

<em>Answer:</em>

  • The option C is correct.
  • CH4N, 90g, C3H12N3.

<em>Explanation:</em>

                    <em>Option C:</em>

  • The molecular formula is C3H12N3.
  • If we take ratio 3:12:3 that will be equal to 1:4:1 so its empirical formula will be CH4N.
  • The molar mass of molecular formula = (12×3) + (1×12) +( 14×3) = 98 g

                <em>Option A :</em>

  • In option A , molecular and empirical formula are both correct but molar mass is not valid. It should be 169 acc. to molecular formula.

              <em>Option B:</em>

  • In option B, molecular formual is not valid.
  • It should be as C6H16O2
4 0
3 years ago
Other questions:
  • How does a scientist critique another scientist’s conclusion?
    14·2 answers
  • HELP QUICK I HAVE A QUIZ ITS JUST MULTIPLE CHOICE
    12·1 answer
  • Self explanatory what’s the answers ?
    13·1 answer
  • How do sulfur and phosphorus move from the biotic to the abiotic pools during their cycle?
    15·1 answer
  • if 150g of aluminum react with 101g of sulfuric acid what is the maximum amount of hydrogen gas that can be produced
    6·1 answer
  • “A mixture is the chemical bonding of two or more substances in any proportion.” Is this statement true or false? Explain your a
    11·2 answers
  • What is the molar mass of C3H8? <br> a) 44.0 g b)11.0 g c)36.0 g d)6.02 × 1023 g
    6·2 answers
  • I need help with these 2 questions below:
    8·1 answer
  • 1.38g of CO2 is how many formula units?​
    8·1 answer
  • If you could travel to any TIME PERIOD, when would go and why.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!