Answer: You should learn the symbols for the eight most abundant elements in the Earth's crust (Oxygen (O), Silicon (Si), Aluminum (Al), Calcium (Ca), Iron (Fe), Magnesium (Mg), Sodium (Na), and Potassium (K) .

Explanation:

7 0

1 year ago

14. Calculate the mass in grams of oxygen required to react completly with 0.75 moles of Aluminum.

cluponka [151]

3mols of O_2 react with 4mol of Al
3/4=0.75mol O_2 react with 1mol of Al

Moles of O_2:-

0.75(0.75)
0.5625mol

Mass of O_2:-

moles(Molar mass)
0.5625(32)
18g

Option B

8 0

1 year ago

Which structure vibrates the hammer? stirrup ear canal eardrum anvil

sammy [17]

ANSWER: Eardrum

EXPLANATION:

The vibrations from the eardrum set the ossicles into motion. The ossicles are actually tiny bones — the smallest in the human body. The three bones are named after their shapes: the malleus (hammer), incus (anvil) and stapes (stirrup). The ossicles further amplify the sound.

5 0

3 years ago

_______ in the mountains melts into water.

Zigmanuir [339]

Answer:

Ice

Explanation:

When ice melts it makes water

8 0

2 years ago