1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Serggg [28]
3 years ago
14

Which of the following isotopes is not commonly used for dating objects? a. carbon-14 b. phosphorus-32 c. potassium-40 d. rubidi

um-87
Chemistry
2 answers:
Alekssandra [29.7K]3 years ago
3 0
<span> a. carbon-14 b. phosphorus-32 c. potassium-40 d. rubidium-87
d</span>
Lunna [17]3 years ago
3 0

Answer:

The correct answer is phosphorus-32-32.

Explanation:

Phosphorus-32 is an isotope of phosphorus found in many organic molecules. They are used to detect metabolic pathways of involving bio-molecules. Also used to detect malignant tumors in the body of the living being.

Where as:

Carbon-14 is used for carbon-14 dating also known as radiocarbon dating. this is used to determine age of  old objects.

Potassium-40 id used to determination of age of rocks and minerals. Specially used in potassium argon dating.

Rubidium-87 is an isotope of rubidium element used to  determine age of rocks.

You might be interested in
Explain the problem surrounding the ammonia-making process in terms of chemical equilibrium.
bazaltina [42]

Answer is: at lower temperatures the reaction rate would decrease.

The lower is the temperature, the slower the reaction becomes.

The Haber process is procedure for the production of ammonia, in this process atmospheric nitrogen (N₂) is converted to ammonia (NH₃):

N₂ + 3H₂ ⇄ 2NH₃ ΔrH = -92 kJ/mol.

Because this is exothermic reaction (enthalpy is less than zero), at lower temperatures, the equilibrium is in favor of ammonia, but the reaction doesn't proceed at a detectable rate.

5 0
3 years ago
What is 25 grams of HF?
Shtirlitz [24]
HI

I found a link that will direct you to the answer of this questions
<span>http://click.dji.com/ANbvbbP7bwUWtSACp6U_?pm=link&as=0004</span>
7 0
3 years ago
How many kilojoules are absorbed when 0.772 mol of N2(g) reacts? N2(g) + 2NO(g) → 2N2O(g) ΔH = 73.8 kJ
ANEK [815]

Answer:

56.97kJ

Explanation:

1 mole of N2 reacts with 73.8kJ

0.772 mole of N2 reacts with xkJ

cross multiply

x= 0.772×73.8

=56.97kJ

5 0
3 years ago
If the mixing ratio of a parcel of air is 6 grams per kilogram and the relative humidity is 25 percent, the saturation mixing ra
Y_Kistochka [10]

Answer: -

24 grams per kilogram.

Explanation: -

We know that

The mixing ratio = actual (measured) mass of water vapor (in parcel) in grams / mass of dry (non water vapor) air (in parcel) in kilogram

The saturation mixing ratio = mass of water vapor required for saturation (in parcel) in grams/ mass of dry (non water vapor) air (in parcel) in kilograms

Relative humidity = actual (measured) water vapor content/ maximum possible water vapor amount (saturation)

Thus saturation mixing ratio = Mixing ratio / relative humidity

= 6 / (25/100)

= 24

4 0
3 years ago
If atoms are electrically neutral then how do they form bonds?​
goldenfox [79]

Answer:

<h3>The nucleus contains neutrons and protons; protons carry the positive charge. The shells contain electrons which carry the negative charge. So, how can the atom be changed. ... Covalent bonds are electrically neutral because they are not formed due to the transfer of electrons but sharing of electrons.</h3>

Explanation:

Hope it helps ^-^

<em>#</em><em>C</em><em>a</em><em>r</em><em>r</em><em>y</em><em>O</em><em>n</em><em>L</em><em>e</em><em>a</em><em>r</em><em>n</em><em>i</em><em>n</em><em>g</em>

5 0
3 years ago
Read 2 more answers
Other questions:
  • Given the balanced equation representing a reaction:
    8·1 answer
  • What is the ratio of [a–]/[ha] at ph 3.75? the pka of formic acid (methanoic acid, h–cooh) is 3.75?
    6·2 answers
  • 12. Which rational number is least?<br>A<br>B<br>C<br>D<br>0.66<br>- 4<br>-<br>-0.6​
    5·1 answer
  • Th e enzyme-catalyzed conversion of a substrate at 25°C has a Michaelis constant of 0.045 mol dm−3. Th e rate of the reaction is
    12·1 answer
  • The kilocalories in one can of cola if it has 40. g of carbohydrate and no fat or<br> protein
    5·1 answer
  • 1.Which Statement best describes the use of a catalyst in a fuel cell?
    6·2 answers
  • Describe the characteristics<br> of the different sections<br> (families) of the periodic<br> table
    8·1 answer
  • Methanol and ethanol are said to be miscible in one another. What does this tell you?
    10·1 answer
  • 4. Automotive airbags inflate when sodium azide, NaN 3, rapidly decomposes to its constituent elements according to the chemical
    8·1 answer
  • Which of the following pairs of elements will not form an ionic bond with
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!