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
Pie
4 years ago
8

Help If U Know This.....Please

Chemistry
1 answer:
skad [1K]4 years ago
6 0
Question 5)

1 Hour: 100g
40 Minutes: 50g
20 Minutes: 25g
0 Minutes: 12.5g

Question 6)

160 Days: 80ou
120 Days: 40ou
80 Days: 20ou
40 Days: 10ou
0 Days: 5ou

Every period of time, the radioactive isotopes halve in numbers as they emit radiation.

I think you now know the gist. Try doing the rest yourself.

Good luck.
You might be interested in
Which element is a metalloid?
Naily [24]

Answer:

helium Because it's in the 9th grade book

8 0
3 years ago
Read 2 more answers
Calculate the average mass for iron. 15.2% iron-55, 85.8% iron-56
Roman55 [17]

Answer:

Iron 55 (Fe-55) is the iron isotope whose nucleus consists of 26 protons and 29 neutrons. It is a radioisotope that disintegrates by electron capture in manganese 55.

Explanation:

i hope this helps if not tell me

5 0
3 years ago
How does the position of an element on the periodic table allow you to determine if the element is a metal or non-metal?
malfutka [58]

Answer:

a jagged black line along the right side of the table separates the metals from the nonmetals. The metals are to the left of the line, the nonmetals are to the right of the line, and the elements immediately next to the line are the metalloids.

Explanation:

7 0
3 years ago
Chemical Reaction Type of reaction
solmaris [256]

Answer:

Explanation:

2NaCl 2Na + Cl2         synthesis reaction

CaCl2 + F2 CaF2 + Cl2          oxidation-reduction

AgNO3 + KCl AgCl + KNO3      precipitation reaction

N2 + H2 2NH3      i dont know

C3H8 + 5O2 3CO2 +4 H2O Balanced Chemical Reactions and the Conservation of Mass

8 0
3 years ago
The melting point of phenol is 40.5∘C and that of toluene is −95∘C. What is the best explanation for this difference? Select the
romanna [79]

Answer:

None of the above

Explanation:

The (−OH) group on phenol can form hydrogen bonds, and the −CH3 group on toluene cannot.

Phenol has only one hydrogen on the −OH group available to form hydrogen bonds, so the hydrogen bond is stronger. In toluene, the hydrogen bond is spread over all three hydrogens on the methyl group, so the interaction is weaker overall.

Phenol has a higher molecular mass than toluene.

3 0
3 years ago
Read 2 more answers
Other questions:
  • Which form of decay produces a nucleus similar to the element helium? alpha particle beta particle gamma rayWhich form of decay
    5·2 answers
  • What minimum concentration of clâ is required to begin to precipitate pbcl2? for pbcl2, ksp=1.17Ã10â5?
    5·1 answer
  • Which of the following would be an appropriate situation for you to use the eye wash station
    12·1 answer
  • How do I balance Na + H2O = NaOH + H2
    6·1 answer
  • Plz help me with this
    8·1 answer
  • He then takes a powerful magnet and positions it below the table and the keys. He finds that he is able to drag the keys along t
    12·1 answer
  • 38.742 kg /0.421 L =
    15·1 answer
  • Can someone help me plz for BRAINLIST I swear I’ll give it to you !! I’m in 6th grade ( just started ) please help I’m begging !
    15·1 answer
  • Very small particles of solids and liquids suspended in air are called​
    6·2 answers
  • If a sample of a gas occupies 5.22 L at 235 oC, what will its volume be at 75 oC if the pressure remains the same?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!