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
Ksenya-84 [330]
4 years ago
8

Please help ill medal and fan!

Chemistry
1 answer:
krok68 [10]4 years ago
6 0
Solutions for your questions are the following:
1. remaining amount is equal to:960 g : 100% = 30 g : xx = 30 g * 100% / 960 g
 = 3.125%
= 0.03125
Now, we use this formula to calculate the number of half-lives:(1/2)ⁿ = x,
so,(1/2)ⁿ = 0.03125
to calculate n, use this equation:
n*log(1/2) = log(0.03125) n = log(0.03125)/log(1/2)
= log(0.03125)/log(0.5)
= -1.505/-0.301  
n=5

Ifn = 5T = 15 min

Then
L = T/nL = 15 min/5
= 3 minutes

2. 
You should pick filtration. It is use to separate heterogeneous mixtures just like in the problem stated.

You might be interested in
Lactose, C12H22O11, is a naturally occurring sugar found in mammalian milk. A 0.335 M solution of lactose in water has a density
Dmitry_Shevchenko [17]

The molality of the solution is 0.00037 m.

<h3>What is concentration?</h3>

The term concentration refers to the amount of solute in a solution.

We have the following information;

Molarity = 0.335 M

Density =  1.0432 g/mL

Temperature = 20 o C

The molality of the solution is obtained from;

m = 0.335 M ×  1.0432 g/mL/ 1000(1.0432 g/mL) - 0.335 M (342 g/mol)

m = 0.344/1043.2 - 114.57

m =  0.344/928.63

m = 0.00037 m

Learn more about molality of solution: brainly.com/question/4580605

5 0
3 years ago
Investigate: Note the empty jars on the shelf that can be filled by using the slider. Set the amount to 2.000 moles of carbon (m
balandron [24]

Answer:

The molar mass of carbon

Explanation:

Before the mass (in grams) of two moles of carbon can be determined, <u>the molar mass of the element would be needed.</u>

<em>This is because the number of mole of an element is the ratio of its mass and the molar mass</em>. That is,

number of mole = mass/molar mass

Hence, the mass of elements can be obtained by making it the subject of the formular;

mass = number of mole x molar mass

<em>Therefore, the molar mass of carbon would be needed before the mass of 2 moles of the element can be determined.</em>

3 0
3 years ago
What is the energy of electromagnetic radiation with wavelength of 568 nm?
anygoal [31]

Apr 15, 2020 · 1 answer
How to get unblocked. 1. See answer. Add answer. Log in to add comment. lunlun02015 is waiting for your help. Add your
6 0
3 years ago
Two elements with the same number of protons but a different number of 2 points
notsponge [240]

Answer: isotopes

Explanation: I remember this from when I took honors chemistry, they are know as isotopes.

3 0
3 years ago
Lines in one spectral series can overlap lines in another.
makvit [3.9K]

The range of wavelengths of the two series shows that the lines in these two series do not overlap. 

<h3>What is Wavelength? </h3>

Wavelength is the distance between two successive curves of a wave. They are the forms of radiation of electromagnetic waves like light waves, radio waves, or heat waves and the distance to the highest peak of the wave is the wavelength. The lights that are visible usually have a wavelength of 400-700 nanometers. For example, when a person shares the same attitude and communicates well with another person. It acts like a yardstick to measure radiation. We measure them from the bottom of one wave to the bottom of the next wave. 

To learn more about wavelengths, visit: brainly.com/question/13533093

#SPJ4

7 0
2 years ago
Other questions:
  • What causes the wind? A.The Earths orbit around the sun B.The Earths rotation on its axis C.The layers of the Earths atmosphere
    13·2 answers
  • Suppose you have 100 grams of radioactive plutonium-239 with a half-life of 24,000 years. how many grams of plutonium-239 will r
    12·1 answer
  • Climates are classified acording to which two major factors
    12·1 answer
  • what would you observe if you used a ballpoint pen instead of a pencil to mark the chromatography paper?
    8·1 answer
  • Provide an explanation at the subatomic level to explain why different colors are observed for different metal salts.
    14·2 answers
  • Write the balanced chemical equation for lab preparation of oxygen gas by using heat​
    8·2 answers
  • Identify two possible reasons for unemployment​
    5·2 answers
  • Two gases are combined and sealed in a 2.0 L container. The 3.0 L of argon gas and 1.0 L of xenon gas each exert 1.00 atm pressu
    9·1 answer
  • Fat and water in the sausage changed state
    11·1 answer
  • Help mee pleasee its urgent<br> ..<br> thank uuuu&lt;3
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!