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Semenov [28]
3 years ago
11

A(n) ________ chemical reaction releases energy, whereas a(n) ________ reaction requires an input of energy.

Chemistry
1 answer:
NeTakaya3 years ago
7 0
There are two types of chemical reaction based on the direction of heat or energy. 

If the energy or heat is absorbed by the system of reactants in order to form the specific products then, the reaction is called endothermic. 

However, if the energy is released by the reactants in the process of producing the products then, the reaction is exothermic.

Hence, for this item, the first blank should be filled with exothermic and the second blank should be filled with endothermic. 

There are sometimes given chemical reactions that do not involve the transfer of heat from the system or from the system. 
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You have 8 moles of a gas at 250 K in a 6 L container. What is the pressure of the gas? Show your work
Bogdan [553]

Hello:

In this case, we will use the Clapeyron equation:

P = ?

n = 8 moles

T = 250 K

R = 0.082 atm.L/mol.K

V = 6 L

Therefore:

P * V = n *  R * T

P * 6 = 8 * 0.082* 250

P* 6 = 164

P = 164 / 6

P = 27.33 atm


Hope that helps!

7 0
4 years ago
The osmotic pressure of a solution formed by dissolving 75.0 mg of aspirin (c9h8o4) in 0.250 l of water at 25 °c is ________ atm
Igoryamba

Answer is: the osmotic pressure of aqueous solution of aspirin is 0.0407 atm.

m(C₉H₈O₄) = 75 mg ÷ 1000 mg/g = 0.075 g.

n(C₉H₈O₄) = 0.075 g ÷ 180.16 g/mol.

n(C₉H₈O₄) = 0.000416 mol.

c(C₉H₈O₄) = 0.000416 mol ÷ 0.250 L.

c(C₉H₈O₄) = 0.00167 M; concentration of solution.

T(C₉H₈O₄) = 25°C = 298.15 K; temperature in Kelvins.

R = 0.08206 L•atm/mol•K; universal gas constant.

π = c(C₉H₈O₄) • T(C₉H₈O₄) • R.

π = 0.00167 mol/L • 298.15 K • 0.08206 L•atm/mol•K.

π = 0.0407 atm.


3 0
3 years ago
What elements start with Ne
tatyana61 [14]
The element that starts with Ne is Neon.
3 0
3 years ago
Write the formula iron 11 bromide
vazorg [7]

Answer:

FeBr2

Explanation:

this isn't really an explanation but it's helpful so here, iron(II) bromide is an inorganic compound with the chemical formula FeBr₂. The anhydrous compound is a yellow or brownish-colored paramagnetic solid. Several hydrates of FeBr₂ are also known, all being pale colored solids.

5 0
3 years ago
I need help here. Did I make any mistakes in any of the equations. Can you please check my work? Please only answer if you know
quester [9]

Answer:

yes it is all corect

Explanation:

4 0
3 years ago
Read 2 more answers
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