A. helium, neon and argon, because they are in the same group or column
Yes, the forensic technique is seen reliable nowadays especially the DNA testing. DNA testing is one of the highly recommended forensic techniques since prior to forensic science process, it will undergo first into rigorous examination and validation of the specimen.
Answer: The mass of the sample will be 1417.7 grams.
Explanation:
We are given:
This means that 1 mole of NaCl has an enthalpy of fusion of 30.2 kJ
1 mole of NaCl has a mass of 58.44 grams.
So, 30.2 kJ of heat is require for a mass 58.44 grams of NaCl
So, 732.6 kJ of heat will be required for = 
= 1417.65 grams of NaCl.
Hence, the mass of NaCl sample will be 1417.7 grams.
Answer:
Similarities
1. Fresh water and marine water both are essential parts of the water cycle.
2. They contain the same chemical and the amount of minerals in both the ecosystems is same.
3. Both addresses to the aquatic development.
Dissimilarities
1. Marine water carries much higher amounts of suspended chemicals as related to fresh water.
2. This larger collection of the chemical also increases the quantity of salt in marine water than that of fresh water.
3. Plant and animals existing in these water bodies also differ.
Answer:
Gravity.
Explanation:
Black holes in the center of most galaxies hold the galaxy together by gravity. Everything is sucked towards the center and kept together.
