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solong [7]
3 years ago
15

the organ system that allows for movement of the organism as a whole and for internal movement of food through the digestive sys

tem, is the _______ system.what is the blank answer?
Chemistry
1 answer:
Elden [556K]3 years ago
3 0

Answer: Skeletal system

The organ system that allows for movement of the organism as a whole and for internal movement of food through the digestive system, is the skeletal system.

Explanation:

An organ system is a group of similar organs which work together to perform specific functions.

Examples of organ system in the body of animals include skeletal and digestive system.

The skeletal system consists of mainly of bones and cartilage, that helps in the following:

- movement

The body move by the aid of connected bones in the skeleton.

- Digestion

The body can carry out functions like contractions and relaxation of the oesophagus (peristalsis) to push chewed food into the stomach for digestion

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Is the number of total molecules on the left side of a balanced equation always equal to the number of total molecules on the ri
Nadya [2.5K]

Answer:

No

Explanation:

No, but the total mass of reactants must equal the total mass of products to be a balanced equation.

Example: Consider the following reaction ...

3H₂ + N₂ => 2NH₃ and 'amu' is atomic mass units (formula weights from periodic table)

In terms of molecules, there are 4 molecules on the left (3 molecular hydrogens (H₂) and 1 molecular nitrogen (N₂) and 2 molecules of ammonia on the right side of equation arrow. ∑reactant molecules ≠ ∑product molecules.

In terms of mass of reactants & mass of products, the 3H₂ + N₂ => 6amu + 28amu = 34amu & mass of products (2NH₃) => 2(14amu) + 6(1amu) = 34amu for sum of product masses.

∑mass reactants = ∑mass products <=> 34amu = 34amu.

The expression '∑mass reactants = ∑mass products' as applied to chemical equations is generally known as 'The Law of Mass Balance'.

3 0
2 years ago
The nuclear symbol for uranium-235 should be written as
ser-zykov [4K]

Answer:

²³⁵₉₂U

Explanation:

               ²³⁵₉₂U

The nuclear symbol of U- 235 should be written as;

   

235 is the mass number of uranium. The mass number is written as the superscript before the symbol of the element.

92 is the atomic number of uranium. It is written as the subscript before the symbol of the element.

 

7 0
2 years ago
What is the mass number of an ion with 108 electrons, 157 neutrons, and a 1 charge?
levacccp [35]
The answer is 264.12

The element is Bh (Bohrium). If the ion has a 1 charge, the charge can either be 1+ or 1-. So the ion has to be an element with the atomic number 107 or 109 (Bh or Mt). Using simple math, subtract the atomic number from the mass number to equal 157.

264 - 107 = 157

3 0
2 years ago
Calculate the volume occupied by 32.0 g of O2 gas, the pressure of the O2 gas is 78.5 kPa at 25°C.
Oksi-84 [34.3K]

Answer: 31.5L

Explanation:

6 0
3 years ago
How many ions form when 39 grams of calcium fluoride are added to excess water? a. 0.50 mol b. 1.0 mol c. 1.5 mol d. 3.0 mol
agasfer [191]

Answer:

c. 1.5 mol

Explanation:

  • Firstly, we need to calculate the no, of moles of 39.0 grams of calcium fluoride.

n = mass / molar mass = (39.0 g) / (78.07 g/mol) = 0.499 mol ≅ 0.5 mol.

  • CaF₂ ionized in water as:

<em>CaF₂ → Ca⁺² + 2F⁻.</em>

Every 0.1 mole of CaF₂ is ionized to 3 ions (1 ion of Ca⁺² and 2 ions of F⁻).

<em>So, 0.5 mol of CaF₂ will contain (3 x 0.5 mol = 1.5 mol) of ions.</em>

Thus, the right choice is "c. 1.5 mol".

6 0
3 years ago
Read 2 more answers
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