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trasher [3.6K]
3 years ago
7

The form of energy that is found in large moving objects is _________ ________ energy.

Chemistry
2 answers:
LiRa [457]3 years ago
7 0
1. Kinetic energy
2. Potential energy
7nadin3 [17]3 years ago
3 0

Answer: The first one would be "_______ mechanical energy" second one is "gravitational potential energy"

Sorry; I have no idea at all what word would be placed in front of mechanical the only word that comes to mind is Kinetic but I think it may be wrong

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Calculate the gravitional force in between two object of mass 25kg and 20kg if distance between them is 5m?
astraxan [27]

Answer:

Explanation:The equation for this is F = -GmM/R^2 where the minus sign says the force is attractive m is 10 kg, M is 20 kg and R is 5 meters. If you crunch the numbers you get an answer of:

7 0
3 years ago
A reaction occurs in a calorimeter, resulting in the starting and final temperatures shown below. What can you say about the rea
Pavlova-9 [17]

Answer:

The reaction is exothermic and ΔH is negative

Explanation:

An exothermic reaction is a chemical reaction that releases energy in the form of heat. It is the opposite of an endothermic reaction in which energy is absorbed. It is expressed in a general thermochemical equation: reactants → products + energy.

We can know that a reaction is exothermic by observing the calorimeter to know if there is an increase in temperature. Remember that an exothermic reaction leads to evolution of heat. This is observed physically as a rise in temperature.

The calorimeter initially read 21.0 and finally read 38.8 at the end of the reaction. This implies that heat was given out in the process. The reaction is exothermic and ∆H is negative.

8 0
4 years ago
Momentum is. __________
horrorfan [7]
 is the product of the mass and velocity of an object, quantified in kilogram-meters per second. 
7 0
3 years ago
At a particular temperature, the solubility of Kr in water is 0.060 M when the partial pressure is 0.90 atm. What partial pressu
elena55 [62]

At a particular temperature, the solubility of He in water is 0.060 M when the partial pressure is 0.90 atm. 2.27 atm is the partial pressure of Kr would give a solubility of 0.150 M.

<h3>What is Henry's Law ?</h3>
  • According to Henry's law, the weight of a gas dissolved by a liquid is proportional to the pressure of the gas onto the liquid.
  • With very few exceptions, a solute molecule in an extremely diluted solution will only have solvent molecules as its close neighbors. This means that the likelihood that a specific solute molecule will escape into the gas phase is predicted to be independent of the total concentration of solute molecules.

Solution:

The solubility of gas is directly proportional to partial pressure. It is expressed as:

S = K_ h \times P _g_a_s

where, S = Solubility of gas

K_h = Henry's Law constant

P_g_a_s = Partial pressure of gas

Now, put the values in above expression we get

0.060M = K_h × 0.9 atm

   K_h =  = 0.066 M/atm

Now we have to find the partial pressure of He

0.150 M = 0.066 M/atm × P_g_a_s

P_g_a_s = 2.27 atm

Learn more about the Henry's Law : brainly.com/question/23204201

#SPJ4

3 0
2 years ago
Calculate the mass of oxygen released by the action of water on 10.0 grams of sodium peroxide (the other product is sodium hydro
lesya692 [45]
The reaction equation:
2H₂O + 2Na₂O₂ → 4NaOH + O₂

Moles of sodium peroxide = 10 / 78 = 0.128

Moles of oxygen released = 0.128 / 2 = 0.064 mol
Mass of oxygen = 0.064 x 32

Mass of oxygen = 2.05 grams
4 0
3 years ago
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