Answer
The base is Ba(OH)2
Explanation
This equation follows the path of, acid +base---salt +water
H2S +Ba(OH)2------BaS +2H2O
Where H2S is the acid, Ba(OH) is the base and 2H2O is water.
Here, Barium hydroxide reacts with hydrogen sulfide to give barium sulfide and water.
Answer:
b. POST has failed, and you should research the BIOS beep codes.
Explanation:
When we here continuous beeps coming from computer and monitor shows no signal as the computer lost its power. This situation arises when POST( Power on self test) has failed and we must research the BIOS( basis input output system) beep codes.
When the post fails there is not any diagnostic testing sequence Runs to evaluate the correct functioning of the computer keyboard, random access memory, storage devices and other peripherals.
Answer:

Explanation:
As the above statement says two carbon atoms are bonded to each other with double bond, the suffix used for double bond is -ene & the prefix for two carbon atoms is eth- & it says four Hydrogen atoms are attached to carbons, 2 Hydrogens to each carbon above & below.
When we draw the structural formula it comes out that the molecule is ethene.
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To balance a chemical equation, place coefficient as needed in front of the symbols or formulas of the elements. So the same number of each type of atom occurs in both reactants and products.
Steps to be followed are-
(1) Write down the chemical reaction in the form of word equation, keeping all the reactants on left hand side and keeping products on right hand side.
(2) Write all the symbol and formula of all reactants and products in word equation.
(3) Balance the whole equation by multiplying the symbols and formula by smallest possible figures.
Same number of each and every atom, of same type occurs in both reactants and products.
Once all the individual elements are balanced, then the total number of atoms of each element on the reactant and product side are compared once again after balancing. If there are no inequalities, the chemical equation is said to be balanced.
To learn more about balancing chemical equations visit the link- brainly.com/question/26227625
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The correct option is B.
Coal dust refers to the powered form of coal. Because of the high surface area of coal dust it is highly prone to dust explosion, which involves rapid combustion of fine particles that are suspended in the air; this usually occur in an enclosed place. Coal dust in an enclosed place is more explosive than coal dust that is blown outdoor in an open space because the coal dust in an enclosed place is more concentrated due to restricted space, thus it is more liable to explosion.