Answer:
2 : 2
Explanation:
The balanced chemical equation is given as:
2K + Cl₂ → 2KCl
From the balanced reaction equation, we can conclude that;
- 2 moles of K will react with 1 mole of Cl₂
- 2 moles of K will produce 2 moles of KCl
- 1 mole of Cl₂ will produce 2 moles of KCl
Therefore, the mole ratio is 2:2 or 1:1 in the simplest form.
Answer: <u>endothermic</u>
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Explanation: <u>A chemical reaction or physical change is endothermic if heat is absorbed by the system from the surroundings. </u>
There are two H2 .There are four nitrogen atoms present. There are two NH3 formed
In order to get the sum of 2.7 and 2.47, we will add both numbers. So, 2.7 plus 2.47 would be 5.17. And the correct number of significant digits in this number is still the same, 5.17, so we have three significant numbers. Why? There are three rules in identifying the significant figures: 1. Non zeros are always significant (which this applies in our sum above). 2. Any zeros in between significant numbers are always significant. 3. <span> The final zero or zeros in the decimal portion only are significant.</span>
2 Na + 2 H2O → 2 NaOH + H2 (balanced equation)
The answer would be 2, since 2 in the coefficient of both Na and NaOH
