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eimsori [14]
4 years ago
12

HELP PLS A chemical reaction between an acid and a base that produces water and a salt is known as neutralization. Which of the

following chemical equations represents a neutralization reaction?
NaCO3 (aq) + CuCl (aq) ® NaCl (aq) + CuCO3 (s)
HBr (aq) ® H+ (aq) + Br- (aq)
NH3 (aq) + HCl (aq) ® NH4Cl (aq)
HNO3 (aq) + KOH (aq) ® KNO3 (aq) + H2O (l)
Chemistry
1 answer:
quester [9]4 years ago
7 0

Answer:

4th Option

Explanation:

HNO3 is an acid, KOH is a base and they react to produce KNO3 which is a salt and H2O water.

So this reaction is a neutralisation reaction.

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8 0
3 years ago
Choose the TRUE statement. A. Laurasia broke up to form Pangaea and Gondwanaland. B. Pangaea broke up to form Laurasia and Gondw
Amanda [17]
B is the correct answer since both Gondwanaland and Laurasia both technically came after pangaea
8 0
3 years ago
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Of the five NASA space shuttles, which one flew the most missions?
Irina-Kira [14]

Endeavour is the youngest shuttle in NASA's orbiter fleet, and was built as a replacement for Challenger. The shuttle flew 25 missions over the course of its spaceflying career, logging a total of 122,883,151 miles (197,761,261 km) on its odometer. Endeavour launched on its maiden flight, STS-49, on May 7, 1992.

8 0
3 years ago
Perform the following operation and express the answer in scientific notation 8.6500x10^3+6.5500x10^5
Dafna1 [17]

Taking into account the scientific notation, the result of the sum is 6.6365×10⁵.

<h3>Scientific notation</h3>

First, remember that scientific notation is a quick way to represent a number using powers of base ten.

The numbers are written as a product:

a×10ⁿ

where:

  • a is a real number greater than or equal to 1 and less than 10, to which a decimal point is added after the first digit if it is a non-integer number.
  • n is an integer, which is called an exponent or an order of magnitude. Represents the number of times the comma is shifted. It is always an integer, positive if it is shifted to the left, negative if it is shifted to the right.

<h3>Sum in scientific notation</h3>

You want to add two numbers in scientific notation. It should be noted that when the numbers to be added do not have the same base 10 exponent, the base 10 power with the highest exponent must be found.

In this case, the highest exponent is 5.

Then all the values ​​are expressed as a function of the base 10 exponent with the highest exponent. In this case: 8.6500×10³= 0.086500×10⁵

Taking the quantities to the same exponent, all you have to do is add what was previously called the number "a". In this case:

0.086500×10⁵ + 6.5500×10⁵= (0.086500+ 6.5500)×10⁵=  <u><em>6.6365×10⁵</em></u>

Finally, the result of the sum is 6.6365×10⁵.

Learn more about scientific notation:

brainly.com/question/11403716

brainly.com/question/853571

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8 0
2 years ago
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Galina-37 [17]

Answer:

Reactants starts the chemical reaction and gives right to the product either by thermal decomposition or in the presence of a catalyst.

Explanation:

Reactants and products contain the same atoms, but they are rearranged during the reaction, so reactants and products are different substances.

6 0
3 years ago
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