A sample originally contained 1.28 g of a radioisotope. It now contains 1.12 g of its daughter isotope.
How many half-lives have passed since the sample originally formed?

Answers

Answer 1

Answer:

3

Explanation:


Related Questions

WHOEVER RESPONDS FIRST WILL GET MARKED BEST!
People's pinkie fingers can either be bent or straight. The allele for bent pinkie fingers is dominant (B). The allele for straight pinkie fingers is recessive (b). Match the genotype (in letters) to the correct genotype (in words). Some answer choices may not be used at all
look at the picture please.

Answers

Explanation: When the little finger bends in towards the palm and can't be straightened out, it is known as streblomicrodactyly, streblodactyly or camptodactyly.

Little fingers range from perfectly straight to bending inwards at a sharp angle. It is not clear whether fingers fall into two discrete categories or there is a continuous range of pinky angle. Hersh et al. (1953) said that bent little fingers bend inward at an angle of 15 to 30 degrees. They found that only 4 out of a sample of 4,304 people had what they considered to be bent little fingers

If only extremely bent little fingers are considered, then the bent little finger trait is too rare to be useful for illustrating basic genetics in classrooms. If fingers with a more moderate bend are counted, then there is no clear dividing line between bent and straight, plus no evidence that the trait is genetic. In either case, you should not use bent little finger to demonstrate basic genetics.

 Bent Little Finger :  A dominant allele results in the end joint of the little finger of each hand bending inward.  Straight little fingers are a result of the recessive genotype.

Place your hands on a flat surface, palms down, and relax.  Check to see if the first joints of your little fingers are bent or straight.

There you go

Hope that helps :)

PS the picture is too fuzzy to read

What type of energy is transferred during heating?
A. Thermal
B. Temperate
C. Convective
D. Conductive
Thank u for helping !:)

Answers

thermal energy is transfers

Answer:

A.) Thermal

Explanation:

I got it correct on founders edtell

Is there a relationship between low-income neighborhoods and obesity? What do you think are some of the reasons?

Answers

Answer:

cheaper foods are usually more processed and unhealthy, therefore, poorer people are likelier to be obese.

Explanation:

8. A fossil plant that helps support the theory of continental drift is ____.
a. Mesosaurus
b. Glossopteris
c. Glomar
d. Pangaea

Answers

Answer:

b.

Explanation:

Why critical thinking is important for chemists?

Answers

Answer:

"Critical thinking is the analysis of available facts, evidence, observations, and arguments to form a judgment. The subject is complex; several different definitions exist, which generally include the rational, skeptical, and unbiased analysis or evaluation of factual evidence. Critical thinking is self-directed, self-disciplined, self-monitored, and self-corrective thinking. It presupposes assent to rigorous standards of excellence and mindful command of their use. It entails effective communication and problem-solving abilities as well as a commitment to overcome native egocentrism and sociocentrism." - Searched it up on Wiki, so at least I stated this-.

I hope this helps..?

Answer:

Critical thinking in the area of chemistry requires students to not just think about the concepts and principles of but also how they can be applied to other areas. Critical thinking creates an area of overlapping or related information to the nature of a certain function.

Explanation:

its simple plus hope this helps

Stoichiometry: mole/ mole help

Answers

Answer:

0.531 moles of CO₂ are formed.

Explanation:

Given data:

Number of moles of CO = 0.531 mol

Number of moles of CO₂ formed = ?

Amount of oxygen = excess

Solution:

Chemical equation:

2CO + O₂    →    2CO₂

Now we will compare the moles of CO with CO₂.

              CO            :            CO₂

                2             :              2

              0.531        :          0.531

Thus, 0.531 moles of CO₂ are formed.

What would happen if organ system failed to work together​

Answers

Answer:

if organ systems failed to work together then the body will not function properly and we should not able to do a simple work and suffer from many others diseases.

Is the organ system do not work together, then homeostasis is not being maintained. If homeostasis is not maintained, the cells of the body will not work properly. As an result the body will not work product

Which action will decrease the gravitational force between two objects?
A. Adding mass to one of the objects
B. Increasing the charge on one of the objects
C. Reducing the masses of the objects
D. Moving the objects closer together

Answers

Answer: C

Explanation:

The force of gravity is proportional to the amount of mass in the system, and is inversely proportional to the separation distance between the two masses.

Adding mass to one of the objects would increase the gravitational field it produces, which in return increases the force of gravity.

Increasing the charge of one of the objects would technically add mass to the system, but it can be considered negligible. The adding of charge would cause an attraction between the two objects, but that is not the gravitational force. It is the Coulomb force.

Reducing the mass of one of the objects would decrease the gravitational field it produces, which would cause the force of gravity to decrease. This is the answer.

Moving the objects closer would cause the denominator of the force equation to decrease. A smaller denominator would cause the equality to increase, aka the gravitational force.

[tex]F=GMm/r^2[/tex]

what is the force needed to accelerate a sled with a mass of 2 kg at a rate of 3.0/s²

A. 6.0N

B. 3.0N

C. 1.5N

D. 3.0N




(help asap please I will give brainliest to the correct answer )​

Answers

Answer:

The answer is option A

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

Force = mass × acceleration

From the question

mass = 2 kg

acceleration = 3 m/s²

We have

Force = 2 × 3

We have the final answer as

6.0 N

Hope this helps you

Calcium and water are the reactants in this chemical reaction. The products are calcium hydroxide and hydrogen gas. Which statement correctly describes the total mass of the products when the reaction is complete?

Answers

Explanation:

Using the Law of Conservation of mass,the mass of the reactants should be equal to the mass of the products after the reaction.

How does latitude
affect climate?

Answers

Answer:

as the latitude increases, the intensity of the solar energy that strikes an area decreases,and climates become cooler

Explanation:

The higher the elevation the cooler the air therefore the climate becomes colder.

How many atoms are in 3.5 L of Neon at STP? Show your work

Answers

Answer:

0.1734

this is the answer to the question

1.is the light from the christmas tree natural or artificial?​

Answers

i would say artificial because it’s not sunlight.
Artificial because it’s man made not natural as in something coming from nature.

What is the missing force?

Answers

Answer:

The missing force is the 17 newton

Explanation:

When fluids are subjected to increases in pressure they tend to do this.

A.) evaporate

B.) contract

C.) expand

D.) solidify

Answers

Answer:

D.) solidify

Explanation:

5. When 8.00 g of Pb(C2H3O2)2 * xH2O are heated, 1.14 g of H2O are driven off. Find the chemical formula and the name of the hydrate

Answers

Answer:

Please look in the paper ! <3

The synthesis of carbohydrates can be particularly difficult because of the large number of chiral centers and OH functional groups present.
a. True
b. False

Answers

True The synthesis of carbohydrates can be particularly difficult because of the large number of chiral centers and OH functional groups present.
a. True
b. False

1. Given the image below, which calculation will NOT give you the correct average atomic mass?

A. (12+12+12+12+12+12+13+13+13+13)
10
B. (60⋅12)+(40⋅13)
C. (0.6⋅12)+(0.4⋅13)
D.

Answers

Answer: I think it’s either C or Dz

Explanation:

Due how it’s calculated.

The calculation that will not give the correct average atomic mass is  (60⋅12)+(40⋅13).

The average atomic mass is obtained as the sum of the products of the relative abundance of each isotope multiplied by its mass.

There are 6 C-12 isotopes and 4 C-13 isotopes. This gives a total of 10 isotopes of both types.

All calculations of average atomic mass are correct except (60⋅12)+(40⋅13).

Learn more: https://brainly.com/question/13292428

the ion with a 3+ charge, 28 electrons, and a mass number of 71

Answers

if your trying to find the element then the element is Nickel.

What happens when there is a change in the DNA of a gene

Answers

Answer:

DNA is a dynamic and adaptable molecule. As such, the nucleotide sequences found within it are subject to change as the result of a phenomenon called mutation. Depending on how a particular mutation modifies an organism's genetic makeup, it can prove harmless, helpful, or even hurtful.

Explanation:

Which of the following helps protect species from extinction?
Question 4 options:


laws and policies


wildlife refuges


conservation efforts


all of the above

Answers

Answer:

all of the above :)

have a nice day !

Explanation:

What information does an acid or base equilibrium constant give?

Answers

The value of the equilibrium constant shows the relative amounts or concentrations of the reactants and products.

A photon has a wavelength of 220 nm. How much energy does the
photon have?

Answers

Answer:

The energy of a photon with a wavelength of 350 nm is 5.7×10−19 J .12‏/05‏/2

Explanation:

Which of the following is true of a compound but not a mixture? (1) A compound contains more than one element.
(2) All the nuclei in a compound contain the same number of protons.
(3) A compound may be heterogeneous.
(4) The composition of a compound does not vary

Answers

The composition of a compound does not vary because it is made up of fix ratio by mass.

What is compound?

A compound is a chemical substance that is composed of more than one element that held together by chemical bonds and produces fix ratio by mass so we can conclude that the composition of a compound does not vary because it is made up of fix ratio by mass.

Learn more about compound here: https://brainly.com/question/634206

Which of the following actions does the Commissioner of Insurance NOT have the power to conduct? O Activate insurance companies' financial reserves O Issue a cease-and-desist order Issue insurance licenses O Regulate the business of insurance in this state​

Answers

The insurance commissioner does not have the right to activate insurance companies' financial reserves.

Functions of the commisioner for insurance

The insurance commisioner is  soely in charge of the control of the bussiness of insurance in the company and seeks to ensure that prudent insurance policies are implemented by the government.

However, the insurance commissioner does not have the right to activate insurance companies' financial reserves.

Learn more about insurance: https://brainly.com/question/989103

A proton in a linear accelerator has a de Broglie wavelength of 132 pm. What is the speed of the wavelength?

Answers

Answer:

The speed of wavelength is 3.0 ×10³ m/s.

Explanation:

Given data:

De Broglie wavelength = 132 pm (132×10⁻¹² m)

Speed of wavelength = ?

Solution:

Formula:

λ = h/mv

λ = wavelength

h = planck's constant

m = mass of proton

v = speed

now we will put the values in formula.

132×10⁻¹² m = 6.63 ×10⁻³⁴ j.s / 1.67 ×10⁻²⁷ kg × v

v =  6.63 ×10⁻³⁴ j.s / 1.67 ×10⁻²⁷ kg × 132×10⁻¹² m

j = kg m²/s²

v = 6.63 ×10⁻³⁴ kg m²/s / 1.67 ×10⁻²⁷ kg × 132×10⁻¹² m

v = 6.63 ×10⁻³⁴ kg m²/s / 220.44 ×10⁻³⁹ kg.m

v = 0.03×10⁵ m/s

v = 3.0 ×10³ m/s

The speed of wavelength is 3.0 ×10³ m/s.

Think of a substance that does not dissolve in water. Explain what happens when this substance is added to water.

Answers

An example would be oil. Oil is considered to be hydrophobic (which translates to "fear of water" so it is repelled by water). It floats on the top of water, which is why oil spills result in black blobs that float on the surface of the ocean rather than mix underneath the surface.

A homogeneous mixture is a solid, liquid, or gaseous mixture that has the same proportions of its components.

a. True
b. False

Answers

Answer:

true

Explanation:

It is because it appears uniformly in the eye

Describe the structure of an Atom (HELP!)

Answers

Answer:

The answer is A.

Explanation:

Neutrons and protons are located in the dense middle of the atom called the nucleus, and electrons are located on the electron cloud located outside of the nucleus.

Calculate the wavelengths (in Å) for the first six Balmer lines (Ha, Hb, Hg, Hd, He, and Hz)

Answers

Explanation:

Transition of n 3→2 6→2

Name -H-α / Ba-α- H-δ- / Ba-δ

Wavelength (nm, air) -656.279 -410.1734

Energy difference (eV)- 1.89 -3.03

Color- Red -Violet

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