Krypton is named after the Greek word that means "secret." Which explains why krypton was most likely given this name? Krypton is a noble gas, so it was difficult for chemists to find it, as though it was a secret.

Explanation:

5 0

3 years ago

A 10 gram iron nail absorbed 125J of heat. What was the final temperature of the nail if the original temperature was 25°C?

valentina_108 [34]

Answer:

52.1 degrees C

Explanation:

We need to use the equation: q = mCΔT, where m is the mass in grams, C is the specific heat capacity, and ΔT is the change in temperature.

Here, m = 10 g and q = 125 J. The heat capacity of iron is about 0.461 J/(g * C). And, our initial temperature is 25. So:

125 J = (10 g) * (0.461 J/(g * C)) * (T_f - 25)

Solving for T_f (final temp), we get: 52.1 degrees C

Hope this helps!

7 0

4 years ago

Whats the difference between a molecule and compound?<br><br> best answer gets branliest :)

Mice21 [21]

molecule- when two or more of the same atoms of an element chemically join together

ex: O2

compund- when the two types of atoms are different

ex: H2O

6 0

3 years ago

Enter the net ionic equation for the reaction of AgNO3(aq)

mixas84 [53]

Answer:

Explanation:

This is a typical double replacement or double decomposition reaction. In this kind of reaction, it involves the combination of ionic compounds which exchange their partners to form new compounds. Typical of these reaction is the formation of precipitates which are insoluble compounds.

The reaction equation is shown below:

AgNO₃ $(_{aq} )$ + K₂SO₄ $(_{aq} )$ → 2KNO₃ $(_{aq} )$ + AgSO₄ $(_{s}$ )

From the rule of solubility:

All trioxonitrate(v) salts are soluble
Salts of silver sulfates are slightly soluble. This will form the precipitate in the solution.

We can write the ionic equation as:

Ag⁺ $(_{aq} )$ + NO₃⁻ $(_{aq} )$ + 2K⁺ $(_{aq} )$ + SO₄²⁻ $(_{aq} )$ → AgSO₄ $(_{s} )$ + 2K⁺ + NO₃⁻ $(_{aq} )$

The spectator ions or non-reactive ions are those ions that appears on both sides of the equation. These ions are the potassium and trioxonitrate ions. We cancel them out to give the net ionic equation of the reaction:

Ag⁺ $(_{aq} )$ + SO₄²⁻ $(_{aq} )$ → AgSO₄ $(_{s} )$

6 0

3 years ago