fosterthefuture fosterthefuture

24-06-2019
Chemistry

contestada

what would the percentage of thorium-232 ( parent compound) be in a rock that was dated at 1.8 billion years

Respuesta :

warnercm warnercm

24-06-2019

The half-life of Th-232 is 1.405 × 10¹⁰ years

Time elapsed = 2.8 x 10⁹ years

Equation of radioactive decay:

A = A₀ = (1/2)^ t/t₁/₂

Thus, the percentage of thorium-232 in the rock that was dated at 2.8 billions year = 87.1%

Answer Link

Otras preguntas

help please I’ll mark you

What’s does a voltage of a power line affect

A recent study reported that diastolic blood pressures of adult women in the united states are approximately normally distributed with mean 80. 6 and standard d

From a basket consisting of 4 apples and 7 oranges, two fruits are selected at random. What is the probability that one is orange and the other is an apple? a)

Read the story below. Then, answer the question. Kites were first used in China. Today, people like to fly kites on windy days. People can make their own kites.

When Renee White applied to participate in the police cadet program, why were several of her friends subsequently contacted by department investigators?

Which of the following areas is the fourth-largest island in the world and is considered part of the continent of Africa

qué más rápido un balón o un lápiz

Name the specialized lymph vessel that transports chyle. A) Lacteals B) Fracteals C) Pasteals D) Vessels

Find the inverse of each function. And show work.