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2 years ago

A box of jello has a mass of 250 g. How many boxes must be bought to have 1 Kg of jello? *

Chemistry

1 answer:

zhuklara [117]2 years ago

8 0

Answer:

Number of boxes = 4

Explanation:

Given:

Mass of one box of jello = 250 grams

Total quantity want to purchase = 1 kg = 1 × 1,000 gram = 1,000 grams

Find:

Number of boxes in 1,000 grams = ?

Computation:

Number of boxes = Total quantity want to purchase / Mass of one box of jello

Number of boxes = 1,000 / 250

Number of boxes = 4

Therefore, 4 boxes of jello must be purchase to get 1 kg of Jello.

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Write a balanced equation to show the reaction of sulfurous acid with caesium hydroxide to form water and caesium sulfite.

Soloha48 [4]

Answer:

H2SO3 + 2CsOH —> Cs2SO3 + 2H2O

Explanation:

When sulfurous acid react with caesium hydroxide, caesium sulfite and water are formed according to the equation:

H2SO3 + CsOH —> Cs2SO3 + H2O

Next, we balanced the equation by putting 2 in front of CsOH and 2 in front of H2O i.e

H2SO3 + 2CsOH —> Cs2SO3 + 2H2O

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Why is the time series useful as a management tool?

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2 years ago

A mystery element contains 11 electrons. Which group of the periodic table will it belong to?

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2 years ago

How many liters of oxygen gas (O2) are needed to produce 100 kJ of energy at STP? 2C6H6(I) + 1502(g) —> 12CO2(g)+6H2O(g)+3909

makkiz [27]

Answer: 8.59 L of oxygen gas are needed to produce 100 kJ of energy at STP

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number $6.023\times 10^{23}$ of particles.

Standard condition of temperature (STP) is 273 K and atmospheric pressure is 1 atmosphere respectively.

1 mole of every gas occupy volume at STP = 22.4 L

The balanced chemical reaction is:

$2C_6H_6(I)+15O_2(g)\rightarrow 12CO_2(g)+6H_2O(g)$

3909.9 kJ of of energy is produced by = $15\times 22.4=336L$

100 kJ of oxygen gas are needed to produce = $\frac{336}{3909.9}\times 100=8.59L$

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2 years ago