Ask question

Ask question

All categories

steposvetlana [31]

3 years ago

7

The half life of potassium 40 is approximately 1.25 billion years. An igneous rock is found to contain about 1/4 of its original

mass of potassium 40. The approximate age of the rock is _____ billion years.

1 answer:

vodomira [7]3 years ago

4 0

Answer:

2.5 billion years

Explanation:

You might be interested in

A bottle contains 3.100 ml of a liquid. the total mass of the bottle and the liquid together is 6.300 g. the mass of the empty b

Olenka [21]

The answer is <span>a. 0.665 g/m</span>

7 0

3 years ago

Read 2 more answers

If carbon has the electron configuration of (2,4) what would the electron configuration of the element to the right of it on the

Svetllana [295]

Answer:

2,5

Explanation:

When move from left to right in periodic table atomic number increases. So element to the right of carbon has one electron more than carbon therefore it's electronic configuration would be 2,5

3 0

3 years ago

The temperature is -14°C the air pressure in an automobile tire is 149K PA if the volume does not change what is the pressure af

Jet001 [13]

Answer: The pressure after the tire is heated to 17.3°C is 167 kPa

Explanation:

To calculate the final temperature of the system, we use the equation given by Gay-Lussac Law. This law states that pressure of the gas is directly proportional to the temperature of the gas at constant pressure.

Mathematically,

$\frac{P_1}{T_1}=\frac{P_2}{T_2}$

where,

$P_1\text{ and }T_1$ are the initial pressure and temperature of the gas.

$P_2\text{ and }T_2$ are the final pressure and temperature of the gas.

We are given:

$P_1=149kPa\\T_1=-14^0C=(273-14)=259K\\P_2=?=27.5psi\\T_2=17.3^0C=(273+17.3)=290.3K$

Putting values in above equation, we get:

$\frac{149}{259}=\frac{P_2}{290.3}\\\\P_2=167kPa$

Hence, the pressure after the tire is heated to 17.3°C is 167 kPa

4 0

3 years ago

What ion does a base increase

cricket20 [7]

OH- is the ion that increases the concentration of a base

8 0

3 years ago

Which occurs whenever valence electrons are shared or transferred between atoms?

Tanzania [10]

Whenever electrons are shared or transferred between atoms there is a chemical reaction.

The electrons that are being transferred between atoms (two or more) create new bonds, which enable the production of a new substance. This process is then known as a chemical reaction.

4 0

3 years ago