Answer:
8.73
Explanation:
when you are adding or subtracting numbers, the sigfig (significant figure) is based on how many numbers after the decimal. with this info, we can see that 15.67 has 2 sigfigs and 6.943 has 3 sigfigs. when you subtract normally, you would get 8.727, which has 3 sigfigs, so you would round the last 7 up to get 8.73 with 2 sigfigs!
also it is to 2 sigfigs because we know that we go by the least number of sigfigs. hope this helped!
Answer:
2KCl + F₂ → 2KF + Cl₂
Explanation:
Law of conservation of mass:
According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.
This law was given by French chemist Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.
2KCl + F₂ → 2KF + Cl₂
In this equation mass of reactant and product is equal. There are 2 potassium 2 chlorine and fluorine atoms on both side of equation it means mass remain conserved.
All other options are incorrect because mass is not conserved.
Mg₂ + LiBr ---> LiMg + Br
In this equation mass of magnesium is more on reactant side.
Na +O₂ ---> Na₂O
In this equation there is more oxygen and less sodium on reactant side while there is more sodium and less oxygen on product side.
H₂O ---> H₂ + O₂
In this equation there is less oxygen on reactant side while more oxygen on product side.
The transition metals is Group 3B(13), there is a smoother decrease in ionization energy because these group contains only the transition metals.
The quantity of strength needed to remove an electron from a selected gaseous atom or ion is called the ionisation electricity Group 3B(13) . not just the atoms that are gases at ambient temperature are protected via it; all the elements at the periodic desk are included.
Ionization energy:
the desired energy to put off an outermost electron from a neutral atom is known as ionization electricity.
In typically, up to down inside the periodic table ionization power is decreases but in group 3A and Group 3B(13) (thirteen) it's miles irregular because the arrival of the transition metals in four length due to this Ga, In and Tl elements indicates better the ionization energies so there's no pattern on this organization.
To learn more about Group 3B(13) refer the link:
brainly.com/question/5489194
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