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3 years ago

Which of these shows the correct hierarchical sequence?

Chemistry

2 answers:

Musya8 [376]3 years ago

5 0

Answer:

Cells > tissues > Organs > Organs Systems

Explanation:

tissues are made of a group of cells

a specific organ is made up of a geoup of specific type of tissues

and a group of organs make up the organs system

gayaneshka [121]3 years ago

4 0

Answer:

cells -> tissues -> organs -> organ system

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3 years ago

When heated, magnesium combines readily with excess oxygen in the air to produce magnesium oxide, as shown in the following unba

aev [14]

<u>Answer:</u> The given chemical reaction can be classified as synthesis and exothermic.

<u>Explanation:</u>

A synthesis reaction is defined as the reaction where two small chemical species combine in their elemental state to form a single large chemical species.

Exothermic reactions are defined as the reactions in which heat is released by the reaction. The heat is written on the product side of the reaction.

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3 years ago

How many grams of water are needed to react with 18.9 grams of li2o? given: li2o+h2oâ2lioh?

4vir4ik [10]

The balanced equation for the reaction is as follows;
Li₂O + H₂O ---> 2LiOH
Stoichiometry of Li₂O to H₂O is 1:1
Mass of Li₂O reacted - 18.9 g
Number of Li₂O moles reacted - 18.9 g / 30 g/mol = 0.63 mol
An equivalent amount of moles of water have reacted - 0.63 mol
mass of water required - 0.63 mol x 18 g/mol = 11.34 g
A mass of 11.34 g of water is required

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3 years ago

Inessa [10]

Answer:

methane + oxygen → carbon dioxide + water

Explanation:

methane + oxygen → carbon dioxide + water

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3 years ago

Describe the characteristics that identify a sample of matter as being a substance.

ollegr [7]

No matter how big or little a material is, its properties remain the same. Size, form, color, and mass are the qualities that distinguish a material from non-substances. All of these qualities, including size, shape, color, and mass, can be seen and measured. Some characteristics are physical, while others are chemical. Physical characteristics include mass, volume, density, and color. Viscosity and solubility are examples of chemical qualities.

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2 years ago