3 years ago

Please help me with these Radioactive Decay Problems ASAP! I need helppppp

Chemistry

1 answer:

Masteriza [31]3 years ago

5 0

Answer:

Explanation:

it is very simple

You might be interested in

The electron dot diagram for a neutral atom of chlorine (atomic number 17) is shown below.

sergejj [24]

Answer:

A. 35Cl1-

Explanation:

Chlorine needs 1 more electron to have full octet thus will take 1 electron and possess a -1 charge.

7 0

3 years ago

What compound/element is this? <br><br> (Easy)

Karo-lina-s [1.5K]

Answer:

C₃H₆ propene

Explanation:

Find the chemical formula by adding all the carbon and then all the hydrogen together.

5 0

3 years ago

A cubic piece of platinum metal (specific heat capacity = 0.1256 J/°C･g) at 200.0°C is dropped into 1.00 L of deuterium oxide ('

polet [3.4K]

Answer:

$a=5.65cm$

Explanation:

Hello,

In this case, for this heat transfer process in which the heat lost by the hot platinum is gained by the cold deuterium oxide based on the equation:

$Q_{Pt}=-Q_{Deu}$

We can represent the heats in terms of mass, heat capacities and temperatures:

$m_{Pt}Cp_{Pt}(T_f-T_{Pt})=-m_{Deu}Cp_{Deu}(T_f-T_{Deu})$

Thus, we solve for the mass of platinum:

$m_{Pt}=\frac{-m_{Deu}Cp_{Deu}(T_f-T_{Deu})}{Cp_{Pt}(T_f-T_{Pt})} \\\\m_{Pt}=\frac{-1.00L*1110g/L*4.211J/(g\°C)*(41.9-25.5)\°C}{0.1256J/(g\°C)*(41.9-200.0)\°C} \\\\m_{Pt}=3860.4g$

Next, by using the density of platinum we compute the volume:

$V_{Pt}=\frac{3860.4g}{21.45g/cm^3}\\ \\V_{Pt}=180cm^3$

Which computed in terms of the edge length is:

$V=a^3$

Therefore, the edge length turns out:

$a=\sqrt[3]{180cm^3}\\ \\a=5.65cm$

Best regards.

6 0

3 years ago

Fill in the blank: <br> A correctly written hypothesis uses an ____ ______ statement

myrzilka [38]

Answer:

a theory of a experiment and the experiment acts like a judge determining if the hypothesis is right or wrong from the final test result

Explanation:

8 0

2 years ago

A relationship in which one variable increases as the other variable decreases is an inverse relationship.

Brut [27]

Answer:

TRUE

Explanation:

HOPE IT WILL HELP YOU

8 0

3 years ago