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ElenaW [278]
3 years ago
9

2Fe + 3C02 3CO + Fe2O3 AH = -24.7 kJ Is the reaction exothermic or endothermic?

Chemistry
1 answer:
Softa [21]3 years ago
7 0

Answer:

the answer should be B xD<<<<<<<<<<<:::::::::::>>>>>>>>::::::::::::<<<<<<:::::>>>>>::::: makes this brainlist for good luck for the rest of ur life dont risk it

Explanation:

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2. The explosion of nitroglycerin, CHS (NO3)3 , is chemically speaking an instantaneous
frosja888 [35]

Answer: In equation of reaction nitrogen N2 is formed instead of O2

Formula of nitroglycerin is C3H5(NO3)3

Number for N2 is 12. Thus one mole nitroglycerin produces 3 moles N2

Explanation:

4 0
3 years ago
Please help!!!
Aloiza [94]

Answer:

3 × 10¯¹⁰

Explanation:

9×10² ÷ 3×10¹²

The above expression can be simplified as follow:

9×10² ÷ 3×10¹²

Recall:

9 = 3²

9×10² ÷ 3×10¹² = 3²×10² ÷ 3×10¹²

Recall:

a^m ÷ a^n = a^(m – n)

3²×10² ÷ 3×10¹² = 3^(2 – 1) × 10^(2 – 12)

= 3¹ × 10¯¹⁰

Recall:

a¹ = a

3¹ × 10¯¹⁰ = 3 × 10¯¹⁰

4 0
3 years ago
Pls help me over here
alexgriva [62]

Answer:

1 and the element is hydrogen (there is an exception for the octet rule for the element hydrogen) hope this helps

Explanation:

8 0
3 years ago
An unknown element, X, is a nonmetal that contains seven valence electrons. Element X most likely forms ___________ covalent bon
Bogdan [553]

Answer:

1

Explanation:

An unknown element, X, is a nonmetal that contains seven valence electrons. Element X most likely forms <u>1 </u>covalent bond.

Nonmetals gain the electron to complete the octet and form anion. Consider the example of halogen.

When it combine with another halogen atom they form covalent bond. There are seven valance electrons in outer most orbital of halogen atom. By combining with other halogen atom they form one covalent bond and complete the octet.

For example:

Cl atom combine with other Cl atom and form Cl₂.

4 0
3 years ago
Buoyancy force is determined by comparing the _____.
Elden [556K]
Did you get the answer? I need help on that one too
5 0
3 years ago
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