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
Alecsey [184]
3 years ago
15

Suppose a laboratory has a 30 g sample of polonium-210. The half-life of polonium-210 is about 138 days. How many half-lives of

polonium-210 occur in 1104 days? How much polonium is in the sample 1104 days later?
Mathematics
2 answers:
Gwar [14]3 years ago
4 0
That is exactly 8 half lives.
After 8 half - lives only (1 / 2^8) or (1 / 256) of the original 30 grams will remain.
(1 / 256) = <span> <span> <span> 0.003906250 </span> </span> </span>
So, 30 * <span> <span> 0.003906250 = </span></span> <span> <span> <span> 0.1171875 grams will remain.
 </span></span></span>




klasskru [66]3 years ago
3 0

Answer:

8 half-lives of polonium-210 occur in 1104 days.

0.1174 g of polonium-210 will remain in the sample after 1104 days.

Step-by-step explanation:

Initial mass of the polonium-210 = 30 g

Half life of the sample, = t_{\frac{1}{2}}=138 days

Formula used :

N=N_o\times e^{-\lambda t}\\\\\lambda =\frac{0.693}{t_{\frac{1}{2}}}

where,

N_o = initial mass of isotope

N = mass of the parent isotope left after the time, (t)

t_{\frac{1}{2}} = half life of the isotope

\lambda = rate constant

\lambda =\frac{0.693}{138 days}=0.005021 day^{-1}

time ,t = 1104 dyas

N=N_o\times e^{-(\lambda )\times t}

Now put all the given values in this formula, we get

N=30g\times e^{-0.005021 day^{-1}\times 1104 days}

N=0.1174 g

Number of half-lives:

N=\frac{N_o}{2^n}

n =  Number of half lives elapsed

0.1174 g=\frac{30 g}{2^n}

n = 7.99\approx 8

8 half-lives of polonium-210 occur in 1104 days.

0.1174 g of polonium-210 will remain in the sample after 1104 days.

You might be interested in
(Please help quick! will do brainliest!!)
Kaylis [27]

Answer:

110

Step-by-step explanation:

that's what I got, I apologize if it's incorrect

4 0
3 years ago
Read 2 more answers
Imagine deleting everything i put
NARA [144]

Answer:

oof that's gotta suck bro

5 0
3 years ago
Round 5,439 to the nearest thousand​
Murrr4er [49]

Answer:

5,000

Step-by-step explanation:

4 is less than 5 and more so, it will leave the 5 alone

It will also turn everything else into 0's. Making it:

-------------------------------------------------------------------------------

5,000

7 0
3 years ago
K +-23 = -100<br>help me
Alex_Xolod [135]

Answer:

-77

Step-by-step explanation:

-77 + -23 = -100

4 0
3 years ago
Absolute Bagels makes bagels using two different recipes, one recipe for regular bagels
shutvik [7]

Answer:

At its most basic, traditional bagel dough contains wheat flour (without germ or bran), salt, water, and yeast leavening. Bread flour or other high gluten flours are preferred to create the firm, dense but spongy bagel shape and chewy texture.

Step-by-step explanation:

A bagel (Yiddish: בײגל, romanized: beygl; Polish: bajgiel; also historically spelled beigel)[1] is a bread product originating in the Jewish communities of Poland. It is traditionally shaped by hand into the form of a ring from yeasted wheat dough, roughly hand-sized, that is first boiled for a short time in water and then baked. The result is a dense, chewy, doughy interior with a browned and sometimes crisp exterior. Bagels are often topped with seeds baked on the outer crust, with the traditional ones being poppy and sesame seeds. Some may have salt sprinkled on their surface, and there are different dough types, such as whole-grain and rye.

The earliest known mention of a boiled-then-baked ring-shaped bread can be found in a 13th-century Arabic cookbook, where they are referred to as ka'ak.[4] Today, bagels are widely associated with Ashkenazi Jews from the 17th century; it was first mentioned in 1610 in Jewish community ordinances in Kraków, Poland.Bagel-like bread known as obwarzanek was common earlier in Poland as seen in royal family accounts from 1394.

Bagels are now a popular bread product in North America and Poland, especially in cities with a large Jewish population, many with alternative ways of making them. Bagels are also sold (fresh or frozen, often in many flavors) in supermarkets.

The basic roll-with-a-hole design is hundreds of years old and has other practical advantages besides providing more even cooking and baking of the dough: The hole could be used to thread string or dowels through groups of bagels, allowing easier handling and transportation and more appealing seller displays.

8 0
2 years ago
Other questions:
  • 6.
    15·1 answer
  • Subtract
    5·1 answer
  • I need help on everything
    13·1 answer
  • What is the length of the altitude of the equilateral triangle below? Thank you! &lt;3
    14·2 answers
  • Find the value of n such that x2-11+n is a perfect square trinomial
    11·1 answer
  • Rahmir bought 18 pieces of candy. he gave1/6 of the apples to each of his 5 friends.how many apples did each friend get?
    11·1 answer
  • Can there be more than one point of intersection between the graphs of two linear equations
    6·1 answer
  • 73 divided by the difference between 12 and 7
    12·2 answers
  • 4.78 gallons of milk is sold for $14.12. If you have $25.60 in your wallet. How many gallons of milk you can buy?
    8·1 answer
  • which of the following represent s of the graph of f (x) equals x exponent 3 think about the reflectional drive using Desmos.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!