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r-ruslan [8.4K]

4 years ago

9

Why must all chemical equations be balanced?

1 answer:

Lera25 [3.4K]4 years ago

8 0

If the equation is not balanced, you have extra of one substance. If you try to do an experiment, you could wind up with a totally different outcome. Its kind of like baking a cake. If the ingredients aren't the right amounts, you dont get an edible cake.

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Plz help me with this

Mekhanik [1.2K]

About half of most soils are inorganic materials, such as the products of weathered rock, including pebbles, sand, silt, and clay particles. The organic materials are necessary for a soil to be fertile. The organic portion provides the nutrients, such as nitrogen, needed for strong plant growth.

5 0

3 years ago

Carbon-14 has a half-life of 5720 years and this is a first-order reaction. If a piece of wood has converted 88.5% of the carbon

Ivahew [28]

<u>Answer:</u> The sample of Carbon-14 isotope is 37056.3 years old

<u>Explanation:</u>

The equation used to calculate rate constant from given half life for first order kinetics:

$t_{1/2}=\frac{0.693}{k}$

where,

$t_{1/2}$ = half life of the reaction = 5720 years

Putting values in above equation, we get:

$k=\frac{0.693}{5720yrs}=1.21\times 10^{-4}yrs^{-1}$

Rate law expression for first order kinetics is given by the equation:

$k=\frac{2.303}{t}\log\frac{[A_o]}{[A]}$

where,

k = rate constant = $1.21\times 10^{-4}yr^{-1}$

t = time taken for decay process = ? yr

$[A_o]$ = initial amount of the sample = 100 grams

[A] = amount left after decay process = (100 - 88.5) = 11.5 grams

Putting values in above equation, we get:

$1.21\times 10^{-4}=\frac{2.303}{t}\log\frac{100}{11.5}\\\\t=37056.3yrs$

Hence, the sample of Carbon-14 isotope is 37056.3 years old

6 0

3 years ago

Casi todos los días usamos el hervidor para calentar el agua con el que hacemos el té o cocinamos los alimentos. Sin embargo, mu

Maru [420]

Answer:

si de si es cierto mi id de freefire. 2301818073

3 0

3 years ago

Which bond does this picture best represent?

ddd [48]

Answer:

C is the answer they are looking for but clearly the truth is D

Explanation:

4 0

3 years ago

If 4 dooms = 7 farzes, 1 bing = 2 wots, 2 zots = 3 dooms, and 9 farzes = 4 bings, then 3 zots = ? wots.

Lubov Fominskaja [6]

3 zots = 7 wots

3 zots × (3 dooms/2 zots) = ⁹/₂ dooms

⁹/₂ dooms × (7 farzes/4 dooms) = ⁶³/₈ farzes

⁶³/₈ farzes × (4 bings/9 farzes) = ⁷/₂ bings

⁷/₂ bings × (2 wots/1 bing) = 7 wots

3 0

3 years ago

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