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zepelin [54]
3 years ago
7

Pb(NO3)2+KI ——-> KNO3 + PbI2

Biology
1 answer:
djverab [1.8K]3 years ago
7 0

Answer: The balanced chemical equation is Pb(NO3)2 + 2KI ——-> 2KNO3 + PbI2

Explanation: A chemical equation is a condensed statement of fact about a chemical reaction which shows the kinds and number of atoms that took part in the reaction.

In writing chemical equations, the reactants are written on the left hand side of the equation with their correct formulae while the products are written on the right hand side of the equation with their correct formulae with an arrow in the middle showing the direction of the reaction.

In balancing a chemical reaction, the total mass of the reactants (number of atoms of reactants) must be equal to the total mass of the products (number of atoms of the products) formed because according to the law of conservation of matter, matter is neither created nor destroyed in the course of a chemical reaction.

Pb(NO3)2 + 2KI ——-> 2KNO3 + PbI2

In the above equation, the number of atoms on both sides of the equation are equal.

Pb is 1 on both sides.

N is 2 on both sides.

O is 6 on both sides.

K is 2 on both sides while

I is 2 on both sides.

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Answer:

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Explanation:

Assume the graph looks like the one below.

It shows that, from Point B to C, the distance they were from home did not change.  They had stopped.

A possible interpretation is that they waited before crossing a busy street.

If they had begun accelerating, BC would have been steeper than AB.

If they had slowed their walk, BC would still point up. However, its slope would be less than that of AB.

If they had returned home, BC would point down and to the right.

 

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According to the graph, which region's population is expected to approach 500 million in the year 2040?
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Answer:

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KengaRu [80]

The phase in the cardiac cycle when the mitral valve is closed and the aortic valve is open is the systolic ejection phase (Option D). It is the second phase of the ventricular systole.

The cardiac cycle is a sequence of contraction and relaxation of the atria and ventricles to pump blood throughout the body.

This cycle (cardiac cycle) can be divided into two major periods: diastole and systole.

The diastole is when the heart relaxes and refills with blood, while the systole is when the heart contracts and pumps blood.

The systolic ejection phase is the second phase of the ventricular systole where blood is pumped from the ventricle.

Learn more in:

brainly.com/question/4224481

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