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3 years ago

How does the ability to balance a chemical equation relate to that reaction obeying the Law of Conservation of Matter?

1 answer:

8 0

Example:
CH4 + 2 O2 → CO2 + 2 H2O 

In the balanced equation above, 1 mole of CH4 will react with 2 moles of O2 to produce 1 mole of CO2 and 1 mole of H2O. 
The mass of 1 mole of CH4 = 12 + (4 * 1) = 16 grams 
The mass of 2 moles of O2 = 2 * 32 = 64 grams 
Total mass of reactants = 16 + 64 = 80 grams 

The mass of 1 mole of CO2 = 12 + (2 * 16) = 44 grams 
The mass of 2 moles of H2O = 2 * 18 = 36 grams 
Total mass of products = 44 + 36 = 80 grams 

Before the reaction, there was 80 grams of matter, and after the reaction there is 80 grams of matter! 
Matter is conserved!

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In the Bohr model of the hydrogen atom, the speed of the electron is approximately 2.2 106 m/s.

Murrr4er [49]

The central force acting on the electron as it revolves in a circular orbit is $9.52 \times 10^{-8} \ N$ .

The given parameters;

speed of electron, v = 2.2 x 10⁶ m/s
radius of the circle, r = 4.63 x 10⁻¹¹ m

The central force acting on the electron as it revolves in a circular orbit is calculated as follows;

$F = \frac{M_e v^2}{r} \\\\$

where;

$M_e$ is mass of electron = 9.11 x 10⁻³¹ kg

$F = \frac{(9.11 \times 10^{-31}) \times(2.2\times 10^6)^2 }{4.63 \times 10^{-11}} \\\\F = 9.52 \times 10^{-8} \ N$

Thus, the central force acting on the electron as it revolves in a circular orbit is $9.52 \times 10^{-8} \ N$ .

Learn more about centripetal force here:brainly.com/question/20905151

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2 years ago

What is the main function of a protein within the body?

aksik [14]

The answer looks to be "A" because Protein is used to regulate organs.

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3 years ago

Read 2 more answers

What are the characteristics of prokaryotes?

Lelu [443]

Prokaryotes lack an organized nucleus and other membrane-bound organelles. Prokaryotic DNA is found in a central part of the cell called the nucleoid. The cell wall of a prokaryote acts as an extra layer of protection helps maintain cell shape, and prevents dehydration.

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3 years ago

The boiling point of sulfur is 444.6 celsius .sulfur melting point is 586.1 fahrenheit lower than its boiling?

iVinArrow [24]

Answer:

(a) Melting point is 136.8°C

(b) Melting point is 278.24°F

Boiling point is 832.28°F

Boiling point is 717.6K

Explanation:

(a) 586.1°F = 5/9(586.1 - 32)°C = 307.8°C

Melting point = 444.6°C - 307.8°C = 136.8°C

(b) Melting point = 136.8°C = (9/5×136.8) + 32 = 278.24°F

Boiling point = 444.6°C = (9/5×444.6) + 32 = 832.28°F

Boiling point = 444.6°C = 444.6 + 273 = 717.6K

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3 years ago

When baking soda and vinegar are mixed together bubbles form and the vinegar and baking soda are changed into new chemicals. Thi

nadya68 [22]

Answer:

A. Chemical change

Explanation:

When vinegar and baking soda are first mixed together, hydrogen ions in the vinegar react with the sodium and bicarbonate ions in the baking soda. The result of this initial reaction is two new chemicals: carbonic acid and sodium acetate.

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3 years ago