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
klasskru [66]
3 years ago
5

Manganese-58 has a half-life of about 3 seconds. If you have a 90.0 gram sample, how

Chemistry
1 answer:
Rus_ich [418]3 years ago
4 0

Answer:

18.018 seconds.

Explanation:

Given that the half life of Manganese, Mn = 3 seconds. The initial sample mass = 90.0 gram, the final sample mass = 1.40 gram.

The general idea to the question is to look for the time it will take to decay from the initial mass that is 90 gram to 1.40 gram.

Therefore, we will be making use of the formula below;

J(t) = J(o) × (1/2)^t/t(hL).

Where t(hL) is the half life, t is the time taken, J(t)= mass after time,t and J(o) is the initial mass. So, let us slot in the values into the equation above.

1.4 = 90 × (1/2)^ t/3.

1.4/90 = (1/2)^t/3.

t/3 = log(0.5) (1.4/90).

+Please note that the 0.5 of the log is at the subscript).

That is the base 0.5 logarithm of (1.4/90) 0.01556 is 6.0060141295.

t = 3 × 6.0060141295.

t = 18.018 seconds.

You might be interested in
Earth has a low air pressure zone at the equator because what
SashulF [63]
Rising air in the tropics is called the Intertropical convergence zone and is a region of rising hot air. As it rises, the moisture in the air eventually reaches its saturation point and the moisture falls out as rain. This is why the tropics are know for their very heavy rainfall periods
7 0
3 years ago
Stored energy due to position is know as blank energy
Drupady [299]

Answer:

Potential energy

Explanation:

Potential energy is the energy possed by an object at rest. It is otherwise referred to as the stored energy due position.

6 0
3 years ago
Name two hormones produced by the endocrine system and describe how they work with other organ systems to maintain homeostasis
Annette [7]
The 2 hormones are insulin & glucagon.

A hormone will only act on a part of the body it 'fits'. A hormone can be thought of as a key, and its target site ( i.e an organ) has specially shaped locks on the cell walls. 
If the hormone fits, then it will work.

The hormone can set off a cascade of other singling pathways in the cell to cause an immediate effect ( for instance, insulin signaling leads to a rapid uptake of glucose in muscle cells)

The endocrine system is a tightly regulated system that keeps the hormones and their effects at just the right level. One way this is achieved is through ' feedback loops'. The release of hormones is regulated by other hormones, proteins or neuronal signals.

The released hormone then has its effect on other organs. This effect on the organ feeds back to the original signal to control any further hormone release.


btw- found all this info @ the Better Health channel, an australian government health website , so if your still confused by my answer, check out this website

www.betterhealth.vic.gov.au/health/conditionsandtreatments/hormonal-endocrine-system

8 0
3 years ago
Read 2 more answers
What does Le Châtelier's principle say about upsetting a system at
never [62]

Answer:

C

Explanation:

7 0
2 years ago
Which molecule or reaction supplies the energy for polymerization of nucleotides in the process of transcription?
Sindrei [870]

Answer to this is "the phosphate bonds that are present in the nucleotide triphosphate serves as the substrates" in the process of transcription.

Transcription is the process in which DNA is transformed into RNA with the help of an enzyme known as RNA-polymerase. RNA and DNA are the nucleic acids which are formed by linking the nucleotides together.


7 0
3 years ago
Other questions:
  • Which statements describe how stars are born? Check all that apply. Stars are born in clouds of gas and dust called nebulas. The
    7·2 answers
  • How can you tell if a chemical reaction has occurred?
    8·1 answer
  • 150.0 grams of iron at 95.0 °C, is placed in an insulated container containing 500.0 grams of water. The temperature of the wate
    10·1 answer
  • Brass is an alloy of copper and zinc. The two metals are melted, mixed, and then solidified. How would you BEST classify brass?
    9·2 answers
  • A small car with mass = 800 kg slows from 15 m/s to 10 m/s. What is the
    9·1 answer
  • 4. It takes a car one minute to go from rest
    7·1 answer
  • The motion of this wave vibrates up and down.
    13·1 answer
  • Which of the following coefficients will correctly
    13·1 answer
  • If 6.75 g of NaOH are dissolved in 50.00 g of water and the temperature increases
    11·1 answer
  • Diabetes occurs when there is a large amount of sugar in the blood. Which gland is most likely not functioning well enough in a
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!