Calculate the molecular mass of Mg(HCO3)2 (Given atomic masses : Mg=24,H=1,C=12,O=16​

Answers 2

Answer:

Calculate the molecular mass of Mg(HCO3)2

(Given atomic masses : Mg=24,H=1,C=12,O=16

Answer:

Molar mass Mg3N2 = 3 × 24 + 2 × 14 = 100 gm/mole.

Step-by-step explanation:

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সম্পূর্ণ স্থিতিস্থাপক চাহিদা কাকে বলে?​

Answer:

যখন কোনো দ্রব্যের মূল্য অপরিবর্তিত থাকে এবং এর চাহিদা বৃদ্ধি বা হ্রাস পায়, তখন এই চাহিদাকে পুরোপুরি স্থিতিস্থাপক চাহিদা বলে।

There are 12 fruits on table of 12 different kinds. 3 different kind of fruits combinations ca 3 randomly. What are the possible Number of ways A. O 220 B. O 36 C. O 156 D. O 4​

Answer:

220

12! ÷ 3! x ( 12-3)! =220

Given:

Number of fruits = 12

kinds of fruits = 3

3 fruits are to be picked

To Find:

Find the number of ways can the fruits be picked that all the fruits be of different kind.

Solution:

As the number of fruits and the kinds of fruits are same , this means that every fruit is of different kind.

We have to select 3 different fruits from 12 different fruits.

when we select 3 different fruits from these 12 different fruits, they would be automatically be different because all are of different kind.

So we have to only select means we have to apply the combination rule.

Acc to combination rule , for selecting r articles from n articles , there [tex]nCr[/tex]

ways, therefore for selecting 3 articles from 12 articles, there would be [tex].^{12}C3[/tex] ways

= 12!/(9!x3!)

= (12x11x10)/(3x2x1)

=220

Hence the total number of ways for selecting the 3 fruits from 12 fruits would be 220.

what are plants called due to carbon dioxide fixation​
QUESTION => what are plants called due to carbon dioxide fixation.ANSWER => autotrophs.

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