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3 years ago

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(GIVING BRAINLIEST!!!)What is the correct formula for the ionic compound that forms when oppositely- charged ions of magnesium a

nd ions of oxygen attract?
(ANSWERS ARE IN THE IMAGE!!)

1 answer:

allochka39001 [22]3 years ago

6 0

Pretty confident that MgO is the answer

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Water (2230 g ) is heated until it just begins to boil. If the water absorbs 5.73×105 J of heat in the process, what was the ini

shutvik [7]

Answer: $38.5^0C$

Explanation:

To calculate the initial temperature of the water:

$q=m\times c\times (T_{final}-T_{initial})$

where,

q = heat absorbed = $5.73\times 10^5J$

$c$ = specific heat of water = $4.18J/g^oC$

m = mass of water = 2230 g

$T_{final}$ = final temperature of water = $100^0C$

$T_{initial}$ = initial temperature of metal = ?

Now put all the given values in the above formula, we get:

$5.73\times 10^5J=2230g\times 4.18J/g^oC\times (100-T_i)^0C$

$(100-T_i)=61.5$

$T_i=100-61.5)=38.5^0C$

Thus, the initial temperature of the water is $38.5^0C$

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