Answer:
Metals are the only substances that use metallic bonds among their atoms.
Explanation:
While many elements are commonly known as metals, including iron, aluminum, gold, silver and nickel, metals include a variety of other elements as well.
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Answer:
A) membrane, nucleus, cytoplasm
Explanation:
- A cell is the fundamental unit of life for living organisms that is made of organelles.
- Each organelle performs a specific function to enhance cell activities.
- Animal and plant cells share certain features and also differ in several ways.
- Animal cells and plant cells contain similar organelles such as cell membranes, mitochondria, nucleus, cytoplasm, and ribosomes among others.
- However, plant cells contain cell wall and chloroplast that are absent in animal cells while animal cells contain centrioles that are absent in plant cells.
They burn up and cause it to look like shooting stars
Answer:
27.7 grams of Li
0.140 moles of Co
0.158 moles of K
59.9 grams of As
8.00x10⁻⁹ moles of U
142.8 moles of H
0.0199 moles of O
0.666 moles of Pb
Explanation:
Mass / Molar mass = Mol
Mol . Molar mass = Mass
3.99 m . 6.94 g/m = 27.7 grams of Li
8.28 g / 58.93 g/m = 0.140 moles of Co
6.17 g / 39.1 g/m = 0.158 moles of K
0.8 mol . 74.92 g/m = 59.9 grams of As
6.02x10²³ (NA) particles are contained in 1 mol
6.02x10²³ are contained in 1 mol U____ 1 mol H ____ 1 mol O ___ 1 mol Pb
4.82x10¹⁵ atoms U ____ 4.82x10¹⁵/ 6.02x10²³ = 8.00x10⁻⁹ moles of U
8.60x10²⁵atoms H ____ 8.60x10²⁵ / 6.02x10²³ = 142.8 moles of H
1.20x10²² atoms O ____ 1.20x10²² / 6.02x10²³ = 0.0199 moles of O
4.01x10²³ atoms Pb ____ 4.01x10²³ / 6.02x10²³ = 0.666 moles of Pb