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aleksandr82 [10.1K]
3 years ago
11

Hey student made a model of a river in a sandbox a pile of sand represents soil and bits of rocks in the riverbed water pouring

from 100% river water as it flows downhill which two characteristics are limitations of the students model
Chemistry
2 answers:
daser333 [38]3 years ago
8 0

Answer:

The model is missing plants, fish and other details found in a real river

The model is much smaller then a real river

Explanation:

oee [108]3 years ago
3 0

Answer:

The model is missing plants, fish and other details found in a real river

The model is much smaller then a real river

Explanation:

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Decide which element probably forms a compound with chlorine that has a chemical formula most and least similar to the chemical
Degger [83]

Answer:

Most similar - Lithium

Least similar - Phosphorus

Explanation:

Rubidium is an element in group 1A of the periodic table. It is a metal and forms an ionic compound with chlorine. The formula of the compound is RbCl.

If we look at the options, Lithium is also a group 1A element and forms an ionic compound with chlorine having the formula LiCl which is very much similar to RbCl chemically.

Phosphorus is a nonmetal. Its compounds with chlorine, PCl3 and PCl5 are covalent and does not resemble RbCl in any way.

8 0
3 years ago
(-5)+(+7)-(-4) + (+12)<br>A 8<br>B 10<br>C 18<br>d 20<br>​
Vladimir79 [104]

Answer:

C-18

Explanation:

Step one follow order of operations

Add and subtract from left to right(-5)+(7)=2-(-4)+(12)

STEP 2

Apply negative Rule -(-4)=+4=2+4+(12)

then add 2+4+12=18

5 0
3 years ago
2al2o3 4al 3o2 what is the mole ra#tio of aluminum to oxygen is 4:3
erik [133]
In the reaction represented by the equation 2Al2O3-->4Al+3O2, what is the mole ratio of aluminum to oxygen?

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3 years ago
A small file or organization use a payroll program for calculating staff wages each month each employee has a unique payroll num
Rama09 [41]

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Answer/Explanation

Characteristics of Life Present in Viruses:

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Characteristics of Life Absent in Viruses:

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  • uses energy  - this is a tricky one. They don't use or produce their own energy. However, in order to reproduce they do hijack the host cells and <u>steal energy</u> from them in order to reproduce
  • exhibits growth and development - although viruses do <u>reproduce</u>, the individual viral particles do not exhibit growth or development
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  • eliminates waste - since they do not have their own metabolism, they have no waste to eliminate
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