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bulgar [2K]
3 years ago
11

if 9 people greet each other at a meeting by shaking hands with one another, how many handshakes will take place?

SAT
1 answer:
mrs_skeptik [129]3 years ago
4 0
81 because each person has 9 people to greet and there’s 9 people so 9x9=81
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Which of the following is not approved for chemical sanitizing affter washing and rinsing
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The substance that is not approved for chemical sanitizing after washing and rinsing is detergent.

<h3>What is a sanitizer?</h3>

A sanitizer refer to a liquid chemical composition which is applied to the hand after washing and rinsing to remove dirt's and kills germs that may be present in the hand.

Therefore, The substance that is not approved for chemical sanitizing after washing and rinsing is detergent.

The question is incomplete, below is the completed part and options gotten from brainly website.

Quaternary ammonium

Chlorine

lodine

Detergent

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brainly.com/question/27846654

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Which of the following tasks would best provide practice for automating letter recognition in kindergarteners
arlik [135]

Tracing a model following numbered arrows on lined paper will best provide practice for automating letter recognition in kindergartners.

<h3>Who is a Kindergartners?</h3>

These are referred to as the group of children between the ages of 4 and 6 years old who attend kindergarten as a way of preparing them for nursery school. These individuals usually have a high sense of inquisitiveness and are fast learners especially when images are used to teach them about various topics in schools or at home.

Practices for letter recognition should be done with the use of tracing the models as it serves as a very important pre-writing activity and serves as the foundation of learning which helps to ensure that adequate knowledge of certain things are achieved.

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8 0
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Using the notation just described, represent a cell based on the following reaction: clo3−(aq)+3cu(s)+6h+(aq)→cl−(aq)+3cu2+(aq)+
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Given the reaction equation; ClO3−(aq)+3Cu(s)+6H+(aq)→Cl−(aq)+3Cu2+(aq)+3H2O(l), the cell notation is Cu/Cu2+//ClO3-/Cl/Pt.

<h3>What is an electrochemical cell?</h3>

A electrochemical cell is one in which electrical energy is produced by chemical processess. In this case, the cell reaction equation is; ClO3−(aq)+3Cu(s)+6H+(aq)→Cl−(aq)+3Cu2+(aq)+3H2O(l).The electrode used here is Pt.

Looking at the equation, we can write the notation for the cell reaction as;Cu/Cu2+//ClO3-/Cl/Pt.

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