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-Dominant- [34]
4 years ago
14

A runner completes a 5-mile run.how many yards did she run

Chemistry
1 answer:
slega [8]4 years ago
5 0

The runner ran a total of 8800 yards.

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A sample of 0.010 mole of oxygen gas is confined at 127 °c and 0.80 atmosphere. what would be the pressure of this sample at 27
devlian [24]
First,let's assume ideal gas behavior for simplicity. This is a special case because the volumes of the two states are equal. At constant volume, we can use the Gay-Lussac equation:

P₁/T₁ = P₂/T₂

(0.8)/(127+273) = (P₂)/(27+273)
Solving for P₂,
P₂ = 0.6 atm

<em>Thus, the answer is 0.6 atm.</em>
4 0
3 years ago
Calculate the molarity of a solution made by adding 45.4 g of nano3 to a flask and dissolving it with water to create a total vo
aleksandr82 [10.1K]
Solutions are made up of two non reacting species called solute and solvent. The amount of solute in solvent is known as concentration of that solute. Concentration is often measured in Molarity. Molarity is the amount of solute dissolved in 1 dm3 of solution. Answer to your question is as follow;

3 0
3 years ago
Read 2 more answers
Which of the following changes can be reversed by changing the temperature: (a) dew condensing on a leaf; (b) an egg turning har
oksano4ka [1.4K]

Answer:

(a) dew condensing on a leaf

(c) ice cream melting

Explanation:

The process which can be reversed by changing the temperature , i.e. , by increasing or decreasing the temperature , is called the <u>reversible process</u> .

From the question ,  

  • dew condensing on a leaf is a reversible process ,  

As the water on the leaf can be changed to gaseous state by increasing the temperature .  

The process of condensation and evaporation are reversible of each other .

  • Ice cream melting

The melted ice cream can be solidified again by reducing its temperature , hence , it is a reversible process .

  • an egg turning hard when boiled and the batter cooking on a hot griddle

They both are irreversible process , and by changing the temperature , we can not get back the original substance .

3 0
3 years ago
The atom of element has 25 electrons and 30 neutrons write down its atomic number and mass number.​
den301095 [7]

Answer:

Atomic number = 25 protons

Mass number = ( 25 + 30 ) = 55

8 0
4 years ago
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A 3.0-mol sample of kclo3 was decomposed according to the equation 2kclo3(s) --&gt; 2kcl(s) + 3o2(g) how many moles of o2 are fo
d1i1m1o1n [39]
2moles of O2 are formed.
5 0
3 years ago
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