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Art [367]
3 years ago
12

How does the compound shown in part 5a of the transparency differ from the elements that comprise it?

Chemistry
1 answer:
Tresset [83]3 years ago
5 0
<span>A compound is ''composed'' of elements. The periodic table is made up of elements. Atoms makes up elements and elements when reacted together make compounds. Na+ and Cl- makes NACL....salt. a compound</span>
You might be interested in
An element has an atomic number of 76. The number of protons and electrons in a neutral atom of the element are ____.
dmitriy555 [2]

Answer:

76 protons 76 electrons

Explanation:

The atomic number in a element is equal to the elements protons and electrons. In this case if the atomic number is 76 the number of protons and electrons would also be 76.

Hope this helps.

8 0
2 years ago
From the list provided, choose the reason that
navik [9.2K]

Answer:

the triple beam balance data were measure to the nearest 100th of a gram

7 0
3 years ago
How many atoms are in 14 moles of I
Zarrin [17]

Answer:28.0855

Explanation:

4 0
3 years ago
A 50.0 mL sample of gas at 20.0 atm of pressure is compressed to 40.0 atm of pressure at constant temperature. What is the new v
guapka [62]

Ans: Final volume = 25.0 ml

<u>Given:</u>

Initial volume V1 = 50.0 ml

Initial pressure P1 = 20.0 atm

Final pressure P2 = 40.0 atm

<u>To determine:</u>

The final volume V2

<u>Explanation:</u>

Ideal gas equation: PV = nRT

under constant temperature, T and number of moles n we have:

PV = constant

or, P1V1 = P2V2

V2 = P1V1/P2 = 20*50/40 = 25 ml.

6 0
3 years ago
What is the final, balanced equation that is formed by combining these two half reactions?
OLga [1]

Answer:

Cu + 2NO3- + 4H+ ---------> Cu2+ + 2NO2 + 2H20

Explanation:

The half reactions are;Cu ----------> Cu2+ + 2e-

NO3 + 2e + 2H* —------> N02 + H20

It is worthy to note that oxidation is the an increase in oxidation number while reduction is a decrease in oxidation number.

In the first half reaction involving Copper, copper has been oxidized as its oxidation number increased from 0 to +2.

IN the reduction half reaction, NO3- has been reduced as its oxidation number decreased from +5 to +4.

In balancing half reactions, the following must be observed;

1. split the reactions into half equations, one for oxidation and the other for reduction.

Cu ------> Cu2+ + 2e-   ( oxidation)

NO3- + 2e- -----> NO2   (reduction).

2. balance on half with respect to atoms and charges.

3. balance the other half with respect to atoms and charges

4. balance by adding H+ ions in acidic solution

NO3- + e- -------> NO2

(-1 )       (-1)             (0)

NO3- + 2H+ +e- -------> NO2

(-1)       (+2)     (-1)            (0)

5. balance hydrogen by adding water molecules

NO3 - + 2H+ + e - -------->  NO2 + H2O

6. combine both equations

Cu ---> Cu2+ + 2e-                                  *1

NO3- + 2H+ + e- -------> NO2 + H2O      *2

= Cu -----> Cu2+ + 2e-

2NO3- +4H+ + 2e- -------> 2 NO2 + 2H20

Combined equation  = Cu + 2NO3- + 4H+ ---------> Cu2+ + 2NO2 + 2H20

4 0
3 years ago
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