Answer:
1255.4L
Explanation:
Given parameters:
P₁ = 928kpa
T₁ = 129°C
V₁ = 569L
P₂ = 319kpa
T₂ = 32°C
Unknown:
V₂ = ?
Solution:
The combined gas law application to this problem can help us solve it. It is mathematically expressed as;
P, V and T are pressure, volume and temperature
where 1 and 2 are initial and final states.
Now,
take the units to the appropriate ones;
kpa to atm, °C to K
P₂ = 319kpa in atm gives 3.15atm
P₁ = 928kpa gives 9.16atm
T₂ = 32°C gives 273 + 32 = 305K
T₁ = 129°C gives 129 + 273 = 402K
Input the values in the equation and solve for V₂;
V₂ = 1255.4L
Answer:
Temperature decreases
Explanation:
The correct answer that indicates that an endothermic reaction has occurred would be a reaction in which the <u>temperature decreases</u>.
An endothermic reaction is a reaction in which energy in the form of heat is absorbed from the surrounding. Hence, the final temperature of an endothermic reaction is usually lower than the initial temperature.
Endothermic reactions are the complete opposite of exothermic reactions in which heat is given off in the course of the reactions. Hence, the temperature of the reaction in exothermic reactions increases instead of decreasing.
<em>In summary, a decrease in temperature of a reaction is an indication that heat has been absorbed during the course of the reaction and such a reaction is said to be endothermic.</em>
Each atom/element has an electron configuration
The electron configuration shows the energy level of the electron
Each electron configuration has 4 quantum numbers, namely n, l, ml, and ms
- n = the principal
- l = the angular momentum / azimuthal
- ml = the magnetic
- ms = the electron-spin
We make an example of the element Mg which is in group 2 with the atomic number 12
Electron configuration of Mg: [Ne] 3s² or 1s² 2s² 2p⁶ 3s²
if Mg removes 2 electrons then Mg will form a positive ion (cation) Mg²⁺
This cation is included in the monatomic ion because it is formed from one element (in contrast to the polyatomic ion, which is formed from two or more elements such as SO₄²⁻, ClO₃⁻)
Electron configuration of Mg²⁺ : 1s² 2s² 2p⁶
So atoms can be positively or negatively charged depending on removing or attracting electrons
Bromine, B2. Hope this helps! ♥
Answer:
<h3>false ..</h3>
since...
- NaOH is an Arrhenius base because it dissociates in water to give the hydroxide (OH-) and sodium (Na+) ions.
hope this answer is helpful for you
<h3>mark as brainlist please</h3>