<span>[He] 2s2 2p4 is the EC</span>
Answer : Note : The formula give in the question needs to be corrected , the formula of two chlorine atoms for every magnesium atom in the compound is 
which is Magnesium Chloride.
Explanation : To write the formula of the compound we need to know the charge of the atoms or elements involved in the formula.
Charge of Mg is +2 and charge of Cl is -1 , to write the formula of the compound we always criss cross the charges. And also when we write the formula the total (or net) charge of the compound should be 0. Charge of Mg is +2 so to get the total(net) charge as 0 we need two Cl atoms with each -1 charge.
Mg = +2 , Cl = -1 , Cl = -1
2 Cl = -1 + (-1) = -2
Mg = +2 and 2 Cl = -2
+2 -2 = 0
So the formula for Magnesium Chloride is
Cross-contamination of lactose/dairy is a real thing, a true statement.
Cross-contamination is a process in which food comes into contact with substances from other foods. This contact causes the food to become contaminated and negatively affects whoever eats it.
One type of contamination is with lactose or dairy. In this process, an element that does not have lactose comes into contact with this chemical compound and is then consumed by someone who is lactose intolerant, which will produce an allergic reaction.
This situation can occur in the lunch area of schools or other venues where lunch is served to many people.
Therefore, it is advisable that restaurants have an implementation for each food and that hygiene protocols are properly followed.
According to the above, dairy cross-contamination is a real situation.
Learn more in: brainly.com/question/20760706
Answer:
Amount of heat required = 2810.5 J
Explanation:
Given data:
Mass of copper = 29.2 g
Initial temperature = 25°C
Final temperature = 275°C
Amount of heat required = ?
Solution:
Specific heat capacity of copper is 0.385 j/g.°C.
Formula:
Q = m×c×ΔT
ΔT = 275°C - 25°C
ΔT = 250°C
Q = 29.2 g × 0.385 j/g.°C ×250°C
Q = 2810.5 J
1 half-life - 4.5 days
x half-lives - 27 days
x=(1*27)/4.5=6
6 <span>half-lives have elapsed after 27 days.</span>
