Covalent bonds exist between two nonmetal elements while ionic bonds exist between a metal and a nonmetal element. In this case, oxygen is a nonmetal and in order to create an ionic bond, the other substance should be a metal. The answer therefore to this problem is calcium.
Answer:
The hormone glucagon secreted by the pancreatic cells cause the release of glucose from the body's storage.
Explanation:
The pancreas is an organ found inside the abdomen. This organ produces hormones such as:
- Insulin
- Glucagon
- Somatostatin
- Vasoactive intestinal peptide
Insulin and glucagon are considered primary hormones secreted by the pancreas.
Upon skipping a meal, leading to a drop in blood sugar levels, glucagon is secreted by the pancreas. This hormone then acts on the liver to stimulate the conversion of stored up glycogen present in the liver into glucose. This produced glucose is then released into the blood stream, availing the boy glucose for energy.
Answer:
The mass of solid with density 14.2 g/cm3 and volume 350 cm3 is 4.97 Kg.
Explanation:
Formula for density is given below :
Insert the values in the formula
on cross multiplication :
1 g = 0.001 Kg
mass = 4.97 Kg
Note : Check the units of volume and density carefully
The answer is silicates!!! Hope this helps!!!
Hi I'm in Chemistry too this year,
I believe D is correct because usually physical changes are things like density, color or quantity.
