Answer:
Positively Charged
Explanation:
The is a group XVI and period 4 element of the periodic table with similar physical and chemical to that of tellurium and sulfur. Selenium exist in different allotropic forms, which have different solubility including selenate, selenite and selenium in elemental form
The Se ion in selenate has a positive charge of +6, while the selenate ion has a charge of -2
The Se ion in selenite has a charge of +4, while the selenite ion has a negative charge of -2.
The charge of Se in elemental selenium is 0.
Answer:
10 moles
Explanation:
of moles = given mass /atomic mass = 280 g /28 g = 10 moles of Si atoms in 280g sample.
Explanation:
A balance chemical equation is a representation of a chemical reaction in which reactants are written on left hand side followed by arrow pointing in right direction along with product on the right-hand side. A balanced chemical equation follows the law of conservation of mass.
The balanced chemical equation for decomposition of nitroglycerin is given as:
4 moles of nitroglycerin on decomposition gives 6 mole of dinitrogen, 1 mole of dioxygen, 10 moles of water and 12 moles of carbon dioxide.
The statement about
“Upwelling is a process in which warm, nutrient rich water from the deep ocean
rises to the surface” is false. It must be the cold, nutrient rich water from
the deep ocean that must rise to the surface and replaces warm surface water.
The cause of upwelling is when the local wind patterns blow along the northwest
coast of South America causing local surface currents to move away. The warm
water is then replaced by the deep cold water
Answer: Humans use energy to carry out their daily activities, like moving around, working, running etc.
Explanation: