Answer:
option d is correct
Explanation:
element of group 1A and 7A(halogens) are highly reactive
Answer & Explanation:
The limiting significant figure in a calculation is our smallest figure. 1 g is one figure by using the significant figure rules. In the same manner we don't count zeros unless there is a non-zero number in front of it so .0001 g is still 1 figure.
So no we only know the unknown to one significant figure.
Microwaves are in microwaves. Radio waves in your phone and UV rays from the sun. Plz give me brainliest I only need one more to lvl up
Answer:
I'd say its speed but not to sure
Explanation:
<span>The part of making a solution that always releases energy is the overall change in forming the solution. The answer is letter D. Although letters A, B and C can be viable answers but, it is not always the case. There are some substances that when you mix or separate them requires more energy or less energy. An example would be w</span>hen the formation (or enthalpy of formation) of carbon
dioxide is negative, it means that it releases heat to the surroundings. When
it releases heat to the surroundings, the reaction is exothermic. Another example is when you mix baking soda and muriatic acid, the resulting mixture is colder. When it is cold, it means that the reaction is endothermic. So the best answer is letter D.
