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3 years ago

How many moles are in 123.0 grams of KClO4? (3 points)

Chemistry

1 answer:

iVinArrow [24]3 years ago

5 0

Answer:

0.8878 mol KClO4

Explanation:

Molar mass of KClO4 = 39.0983 + 35.453 + ( 15.9994 x 4 ) = 39.0983 + 35.453 + 63.9976 = 138.5489g/mol

but,

number of moles = mass in grams / molar mass where mass in grams = 123g, molar mass = 138.5489g/mol

number of moles = 123g / 138.5489g/mol = 0.8878mol

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Mamont248 [21]

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Answer:

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3 years ago

8. True or False: There are some exceptions to the rule.... organisms such as a protist called a

ankoles [38]

There are some exceptions to the rule organisms such as a protist called a euglena can be both heterotrophic and autotrophic. This is a true statement.

Explanation:

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3 years ago

How many grams of sodium chloride could be produced from 41.3 L of chlorine gas?

babymother [125]

Answer:

The grams of sodium chloride that will be made is 292.5 g. calculation. 2Na + Cl₂ → 2NaCl. step 1: calculate the moles of Na. moles = mass/molar mass. From periodic table the molar mass of Na = 23 g/mol. moles = 115 g/23 g / mol = 5 moles. Step 2 : use the mole ratio to determine the moles of NaCl. Na:NaCl is 2:2 = 1:1 therefore the moles of NaCl is also = 5 moles.

Explanation:

We know sodium is a very active metal and chlorine is also a very reactive non-metal. Usually, metals like to eliminate electrons and non-metals such as halogens like to accept electrons. Sodium readily eliminate its last shell electrons become Na+ cation and chlorine accepts that electron to form Cl-anion.

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2 years ago

Marigold, Inc. uses activity-based costing as the basis for information to set prices for its six lines of seasonal coats.

agasfer [191]

Answer:

Designing= $42 per designer hour

Sizing and cutting= $26.85 per machine hour

Stitching and trimming= $17.75 per labor hour

Wrapping and packing= $10.5 finished unit

Explanation:

<u>To calculate the activity-based overhead rates, we need to use the following formula:</u>

Predetermined manufacturing overhead rate= total estimated overhead costs for the period/ total amount of allocation base

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Wrapping and packing= 346,500/33,000= $10.5 finished unit

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3 years ago