All categories

3 years ago

What type of isotope undergoes radioactive decay?

Chemistry

2 answers:

Troyanec [42]3 years ago

7 0

Answer:

B, one that has an unstable nucleus

Explanation:

Dominik [7]3 years ago

3 0

Answer:

All elements with 84 or more protons are unstable; they eventually undergo decay. Other isotopes with fewer protons in their nucleus are also radioactive.

You might be interested in

Balance the combustion reaction between propane and oxygen.<br> C ₃ H ₈+ O ₂→ CO ₂ + H ₂ O

lys-0071 [83]

Answer:

The answer is C3H8 + 5O2 → 3CO2 + 4H2O .

6 0

3 years ago

Read 2 more answers

when a 12.7 g chunk of zinc dissolves in 500. ml of 1.450 m hcl, what is the concentration of hydrogen ions remaining in the fin

Schach [20]

Concentration of hydrogen ions remaining in the final solution is $.673 M$

In original solution we have 1.450M of HCl

1.450 M means 1.450 moles of HCl in 1 liter of water

Therefore, number of moles of HCl in 500ml of water will be

= $1.450*0.5$ moles

= 0.725 moles of HCl

Reaction between HCl and Zn happens when zinc is added -

$Zn(s) + 2HCl$ → $ZnCl_{2} + H_{2}$

Therefore two moles of HCl is needed for 1 mole of zinc

Thus number of moles of HCl needed to react with 12.7g of Zinc will be

= $(12.7/ 65.38 moles of Zn )* (2moles of HCl/mole of Zn)$

= .388 Moles

So moles of HCl left = $0.725 - .3888$

= 0.3365 moles

In 1 Mole of HCl there is 1 mole of H because

$HCl$ → $H^{+} + Cl^{-}$

Therefore in 0.3365 mole HCl there will be 0.3365 moles of H

Thus final concentration of H ions in final solution is =

= $0.3365mole/0.5 L$

= 0.673M

To know more about concentration in solution

brainly.com/question/22837979

#SPJ4

8 0

2 years ago

To save on heating bills, do you think the roof of a building should be lined with

bekas [8.4K]

A thermal insulator because it would keep the heat in

4 0

3 years ago

Read 2 more answers

Li and S - covalent or ionic bond?

Evgesh-ka [11]

Answer:

It is an ionic bond.

Explanation:

Ionic bonds occur when a metal and a nonmetal combine, while covalent bonds occur between two nonmetals. Lithium is a metal and sulfur is a nonmetal.

4 0

3 years ago

Read 2 more answers

Calculate the number of pounds of CO2 released into the atmosphere when a 15.0-gallon tank of gasoline is burned in an automobil

masha68 [24]

<h3>Answer:</h3>

266.997 pounds

<h3>Explanation:</h3>

The balanced equation for the combustion of octane is;

2C₈H₁₈(l) + 25O₂(g) → 16CO₂(g) + 18H₂O(g)

Assuming that gasoline is purely octane:

Amount of gasoline available is 15.0 gallon

We are required to calculate the amount of CO₂ released to the atmosphere;

This can be done in several steps;

Step 1: Mass of octane in grams

Amount of octane = 15.0 gallons

But, 1 gallon = 3785.41 ml

Therefore;

15 gallon is equivalent to;

= 15 ×3785.41 ml

= 56,781.15 ml

We are given the density of octane (0.692 g/ml) and thus we can calculate the mass of octane.

Mass = density × volume

= 0.692 g/ml × 56,781.15 ml

= 39,292.56 g

Step 2: Number of moles of octane

Number of moles = Mass/ Molar mass

Molar mass of octane = 114.23 g/mol

Number of moles of Octane = 39,292.56 g ÷ 114.23 g/mol

= 343.978 moles

Step 3: Moles of carbon dioxide released

From the equation;

2 moles of octane completely burns in air to yield 16 moles of CO₂

Therefore;

343.978 moles of octane produces;

= (343.978 moles/2) 16

= 2751.824 moles of CO₂

Step 4: Mass of CO₂ in pounds

1 mole of CO₂ has 44.01 g

Therefore;

2751.824 moles contains;

= 2751.824 moles × 44.01 g/mol

= 121,107.77 g

But, 1 pound = 453.592 g

Therefore;

Mass of CO₂ in pounds = 121,107.77 g ÷ 453.592 g

= 266.997 pounds

Therefore, the mass of CO₂ released to the atmosphere is 266.997 pounds

4 0

3 years ago