मराठी
महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता ११ वी

Solve the following problem: Write the following number in ordinary decimal form: 5.00858585 - Chemistry

Advertisements
Advertisements

प्रश्न

Solve the following problem:

Perform the following calculation. Round off your answer to two digits.

13.40×1024

बेरीज

उत्तर

13.40×1024

= 0.2941 × 10–24

= 2.941 × 10–25

= 2.9 × 10–25

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 2: Introduction to Analytical Chemistry - Exercises [पृष्ठ २५]

APPEARS IN

बालभारती Chemistry [English] 11 Standard
पाठ 2 Introduction to Analytical Chemistry
Exercises | Q 4. (P)(a) | पृष्ठ २५

संबंधित प्रश्‍न

To make a saturated solution, 36 g of sodium chloride is dissolved in 100 g of water at 293 K. Find its concentration at this temperature.


Explain the term Saturated solution giving examples.


Calculate the amount of carbon dioxide that could be produced when 1 mole of carbon is burnt in 16 g of dioxygen.


Calculate the amount of carbon dioxide that could be produced when 2 moles of carbon are burnt in 16 g of dioxygen.


A sample of drinking water was found to be severely contaminated with chloroform, CHCl3, supposed to be carcinogenic in nature. The level of contamination was 15 ppm (by mass).

  1. Express this in percent by mass.
  2. Determine the molality of chloroform in the water sample.

Dinitrogen and dihydrogen react with each other to produce ammonia according to the following chemical equation:

NA2(g)+3HA2(g)2NHA3(g)

(i) Calculate the mass of ammonia produced if 2.00 × 103 g dinitrogen reacts with 1.00 × 103 g of dihydrogen.

(ii) Will any of the two reactants remain unreacted?

(iii) If yes, which one and what would be its mass?


Calculate the molarity of a solution of ethanol in water in which the mole fraction of ethanol is 0.040 (assume the density of water to be one).


To make a saturated solution, 36 g of sodium chloride is dissolved in 100 g of water at 293 K. Find its concentration at this temperature.


A solution contains 40 g of common salt in 320 g of water. Calculate the concentration in terms of mass by the mass percentage of the solution.

Solve the following problem:

Find out the molar mass of the following compounds:

Copper sulphate crystal (CuSO4.5H2O)

(At. mass: Cu = 63.5; S = 32; O = 16; H = 1; Na = 23; C = 12; Fe = 56; N = 14)


Solve the following problem:

Find out the molar mass of the following compounds:

Sodium carbonate, decahydrate (Na2CO3.10H2O)

(At. mass: Cu = 63.5; S = 32; O = 16; H = 1; Na = 23; C = 12; Fe = 56; N = 14)


Solve the following problem:

Find out the molar mass of the following compounds:

Mohr’s salt [FeSO4(NH4)2SO4.6H2O]

(At. mass: Cu = 63.5; S = 32; O = 16; H = 1; Na = 23; C = 12; Fe = 56; N = 14)


Solve the following problem:

Write the following number in ordinary decimal form:

3.75 × 10−1


Solve the following problem:

Write the following number in ordinary decimal form:

0.011 × 10−3


Solve the following problem:

Write the following number in ordinary decimal form:

0.00477 × 105


Solve the following problem:

Perform the following calculation. Round off your answer to two digits.

339.00×10-4


Solve the following problem:

Perform the following calculation. Round off your answer to two digits.

1.4×109(2.77×103)(3.76×105)


Solve the following problem:

Perform the following calculation. Round off your answer to two digits.

(4×10-3)(9.9×10-7)(789)(1.002×10-10)(0.3×102)


Perform each of the following calculations. Round off your answers to three digits.

(3.26104) (1.54106)


Name the process associated with the following

A drop of ink placed on the surface of water contained in a glass spreads throughout the water.


Give an example of each mixture having the following characteristics. Suggest a suitable method to separate the components of this mixture

Two immiscible liquids.


If 500 mL of a 5 M solution is diluted to 1500 mL, what will be the molarity of the solution obtained?


If the concentration of glucose (CA6HA12OA6) in blood is 0.9 g L–1, what will be the molarity of glucose in blood?


Which of the following solutions have the same concentration?

(i) 20g of NaOH in 200mL of solution

(ii) 0.5mol of KCl in 200mL of solution

(iii) 40g of NaOH in 100mL of solution

(iv) 20g of KOH in 200mL of solution


An aqueous KCl solution of density 1.20 g mL-1 has a molality of 3.30 mol kg-1. The molarity of the solution in mol L-1 is ______. (Nearest integer)


With increase of temperature, which of these changes?


What quantity (in mL) of a 45% acid solution of a monoprotic strong acid must be mixed with a 20% solution of the same acid to produce 800 mL of a 29.875% acid solution?


The molality of solution containing 15.20 g of urea, (molar mass = 60) dissolved in 150 g or water is ______.


The molarity of urea (molar mass 60 g mol−1) solution by dissolving 15 g of urea in 500 cm3 of water is ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×
Our website is made possible by ad-free subscriptions or displaying online advertisements to our visitors.
If you don't like ads you can support us by buying an ad-free subscription or please consider supporting us by disabling your ad blocker. Thank you.