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
Masteriza [31]
2 years ago
14

knowing that the reaction of potassium in water is extremely exothermic, what would be the problem with adding a large piece of

potassium to a small amount of water?
Chemistry
1 answer:
anygoal [31]2 years ago
8 0

Answer:

Explanation:

If the reaction is really exothermic (and it is) then the water would spatter all over the place. It would boil off if the container could hold it. It would also react according to the following reaction.

You are talking about a reaction like

2K + 2HOH = 2KOH + H2

You might be interested in
Hydrogen reacts with 0.771 g of carbon to form 0.90 g of a compound. What is the mass percent of hydrogen in the compound
morpeh [17]
Answer: 14.3%

Explanation: In order to find the mass percent of hydrogen in this compound, you must determine how many grams of hydrogen you'd get in 100 g of compound. 

In your case, you know that an unknown mass of hydrogen reacts with 0.771 g of carbon to form 0.90 g of hydrocarbon, which is a compound that contains only carbon and hydrogen. 

Use the total mass of the hydrocarbon to determine how many grams of hydrogen reacted with the carbon.

Now, if 0.90 g of this compound contain 0.129 g of hydrogen, it follows that 100 g of this compound will contain.

So, if 100 g of this compound contain 14.33 g of hydrogen, it follows that the mass percent of hydrogen is 14.3%


<span><span><span><span><span><span><span><span><span /></span></span></span></span></span></span></span></span><span><span>
</span></span>
4 0
3 years ago
Read 2 more answers
A sample of 14.5 g of sodium bicarbonate (NaHCO3) was dissolved in 100 ml of water in a coffee-cup calorimeter with no lid by th
Ann [662]

Answer:

The ΔH of the reaction is + 12.45 KJ/mol

Explanation:

Mass of water= 100ml = 100g. (You should always assume 1cm3 of water as 1g)

heat capacity of water = 4.18 Jk-1 Mol-1

Change in temperature = (19.86 - 25.00) = -5.14 K (This is an endothermic reaction because of the fall in temperature)

Molar mass of NaHCO3 = 84 g/mol

Mole of NaHCO3 = 14.5 / 84 = 0.173 mol

Step 1 : Calculate the heat energy (Q) lost by the water.

            Q = M x C x ΔT

            Q = -100 x 4.18 x (-5.14)

            Q = 2148.5 joules

            Q = 2.1485 K J

Step 2: Calculating the ΔH of the reaction?

          ΔH = Q / number of moles of NaHCO3

          ΔH = 2.1485 / 0.173

          ΔH = 12.42 KJ/mol

3 0
3 years ago
Why is the manatee classified as an herbivore?
scoray [572]
Anything considered as a herbivore would be something that eats plants
3 0
2 years ago
Read 2 more answers
Please help ! its urgent!!
ArbitrLikvidat [17]

Answer:

D

Explanation:

Respiration is the process by which you get energy from food. So energy in food is converted to a form that can be used by the body

5 0
2 years ago
Do elements have DNA?
jeyben [28]
Not most elements have DNA, only five "elements" have DNA. <span>The five "elements" are Carbon, Oxygen, Hydrogen, Nitrogen and Phosphorus. Good luck with your question I hope this is what you were looking for.</span>
6 0
3 years ago
Other questions:
  • Convert 7.680 moles of PtSe to grams
    15·1 answer
  • How does concentration affect reaction rate
    11·2 answers
  • Read the statement.
    12·1 answer
  • Suppose that this individual now decides to give one-eight percent of a percent (0.125%) of her new net worth (8.12 * 10^10 to c
    13·2 answers
  • What occurs at transform boundary faults and can cause tremendous devastation
    11·2 answers
  • PLEASE HELP!! STOICHIOMETRY!
    9·1 answer
  • Which chemical equation represents a precipitation reaction?
    6·1 answer
  • How much heat is released when 0.762 mol of copper cools<br> from 81.6°C to 52.2°C?
    8·1 answer
  • What is the net ionic charge of calcium ion
    12·1 answer
  • What is the difference between the number of electrons in an atom of tin (Sn) and the number of electrons in an atom of oxygen (
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!