हिंदी

Solve the following problem: Write the following number in ordinary decimal form: 0.011 × 10−3 - Chemistry

Advertisements
Advertisements

प्रश्न

Solve the following problem:

Write the following number in ordinary decimal form:

0.011 × 10−3

एक पंक्ति में उत्तर

उत्तर

0.011 × 10−3 = 0.000011

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 2: Introduction to Analytical Chemistry - Exercises [पृष्ठ २५]

APPEARS IN

बालभारती Chemistry [English] 11 Standard
अध्याय 2 Introduction to Analytical Chemistry
Exercises | Q 4. (O)(e) | 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 air.


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


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 mole fraction


Why does the molarity of a solution depend upon temperature?


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:

5.16 × 104


Solve the following problem:

Write the following number in ordinary decimal form:

5.00858585


Solve the following problem:

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

`33/(9.00xx10^-4)`


Solve the following problem:

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

`((4xx10^-3)(9.9xx10^-7))/((789)(1.002xx10^-10)(0.3xx10^2))`


Solve the following problem:

A 1.000 mL sample of acetone, a common solvent used as a paint remover, was placed in a small bottle whose mass was known to be 38.0015 g.
The following values were obtained when the acetone - filled bottle was weighed: 38.7798 g, 38.7795 g and 38.7801 g. How would you characterise the precision and accuracy of these measurements if the actual mass of the acetone was 0.7791 g?


Solve the following problem:

Your laboratory partner was given the task of measuring the length of a box (approx 5 in) as accurately as possible, using a metre stick graduated in milimeters. He supplied you with the following measurements:

12.65 cm, 12.6 cm, 12.65 cm, 12.655 cm, 126.55 mm, 12 cm.

Give your reason for rejecting each of the others.


Solve the following problem:

What weight of calcium oxide will be formed on heating 19.3 g of calcium carbonate?
(At. wt.: Ca = 40; C = 12; O = 16)


Solve the following problem:

The hourly energy requirements of an astronaut can be satisfied by the energy released when 34 grams of sucrose are “burnt” in his body. How many grams of oxygen would be needed to be carried in space capsule to meet his requirement for one day?


When light is passed through water containing a few drops of milk, it shows a bluish tinge. This is due to the ______ of light by milk and the phenomenon is called ______. This indicates that milk is a ______ solution.


Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.

Name a lustrous non-metal.


A child wanted to separate the mixture of dyes constituting a sample of ink. He marked a line by the ink on the filter paper and placed the filter paper in a glass containing water as shown in Fig.2.3. The filter paper was removed when the water moved near the top of the filter paper.

(i) What would you expect to see, if the ink contains three different coloured components?

(ii) Name the technique used by the child.

(iii) Suggest one more application of this technique.


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


Which of the following solutions have the same concentration?

(i) \[\ce{20 g of NaOH in 200 mL of solution}\]

(ii) \[\ce{0.5 mol of KCl in 200 mL of solution}\]

(iii) \[\ce{40 g of NaOH in 100 mL of solution}\]

(iv) \[\ce{20 g of KOH in 200 mL of solution}\]


Which of the following terms are unitless?

(i) Molality

(ii) Molarity

(iii) Mole fraction

(iv) Mass percent


Match the following physical quantities with units

Physical quantity Unit
(i) Molarity (a) g mL–1
(ii) Mole fraction (b) mol
(iii) Mole (c) Pascal
(iv) Molality (d) Unitless
(v) Pressure (e) mol L–1
(vi) Luminous intensity (f) Candela
(vii) Density (g) mol kg–1
(viii) Mass (h) Nm–1
  (i) kg

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)


Molarity of liquid HCl will be if the density of the solution is 1.17 g/cc.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×