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1 year ago

Help pls you get 22 points if you answer me

Chemistry

1 answer:

snow_tiger [21]1 year ago

5 0

Answer:

the 2nd one

Explanation:

All other symbols are for Mathematics.

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How many joules of energy are produced when 3.0 × 10-28 kilograms of mass are lost? [(1 j = 1 ) and the speed of light = 3.00 ×

Aleksandr [31]

The equation that we are going to use on this problem is the famous Einstein field equation. E = mc^2 where E is the energy (to be computed), m is the mass (3.0 × 10-28 kilograms) and c is the speed of light (3.00 × 10^8). If we plug in the given into the equation the answer will be 2.7*10^-11 KJ or 2.7*10^-8 J.

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2 years ago

Be sure to answer all parts. Write an unbalanced equation to represent each of the following reactions: Do not include phase abb

Eva8 [605]

Answer: The unbalanced chemical equations are written below.

Explanation:

An unbalanced chemical equation is defined as the equation in which total number of individual atoms on the reactant side is not equal to the total number of individual atoms on the product side. These equations does not follow law of conservation of mass.

For a:

The chemical equation for the reaction of nitrogen gas and oxygen gas follows:

$N_2+O_2\rightarrow NO_2$

The product formed is nitrogen dioxide.

For b:

The chemical equation for the decomposition of dinitrogen pentaoxide follows:

$N_2O_5\rightarrow N_2O_4+O_2$

The product formed is dinitrogen tetroxide and oxygen gas.

For c:

The chemical equation for the reaction of ozone to oxygen gas follows:

$O_3\rightarrow O_2$

The product formed is oxygen gas.

For d:

The chemical equation for the reaction of chlorine and sodium iodide follows:

$Cl_2+NaI\rightarrow NaCl+I_2$

The product formed is sodium chloride and iodine gas

For e:

The chemical equation for the reaction of magnesium and oxygen gas follows:

$Mg+O_2\rightarrow MgO$

The product formed is magnesium oxide

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2 years ago

The oxygen side of a water molecule is _____.

tatiyna

The correct answer would be “slightly negative”.

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3 years ago

Problems in Context Which separation method is operating in each of the following procedures? (a) Pouring a mixture of cooked pa

Serga [27]

Answer:

( a ) Filtration

( b ) sugar refining .

Explanation:

( a ) Filtration

By the process of filtration pasta from water can be removed , as pasta is not soluble in water , hence , by filtration , the solid pasta will remain in the filtration funnel , and the water will flow down , thereby , removing pasta from the water .

( b ) sugar refining

The raw sugar can be purified from the process of sugar refining .

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3 years ago

An element in group 7 on the periodic table most likely has which physical property?

larisa86 [58]

Answer:

They are most likely solid

Explanation:

solid is a physical property

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3 years ago