Chemical CalculationsD. Van Nostrand Company, 1923 - 276 páginas |
Dentro del libro
Resultados 1-5 de 27
Página 1
... decimal point are not counted as significant figures . Thus , the speed of light , given as 186,000 miles per second , has three significant figures , the final zeros merely serving three or four , as for instance , Beryllium ( I ...
... decimal point are not counted as significant figures . Thus , the speed of light , given as 186,000 miles per second , has three significant figures , the final zeros merely serving three or four , as for instance , Beryllium ( I ...
Página 2
... decimal point . The ash of a certain size and grade of filter paper may be given as 0.00042 g . , the zeros merely serving to indicate the posi- tion of the decimal point , there being only two significant figures . 1 Logarithms have ...
... decimal point . The ash of a certain size and grade of filter paper may be given as 0.00042 g . , the zeros merely serving to indicate the posi- tion of the decimal point , there being only two significant figures . 1 Logarithms have ...
Página 3
... decimal place . To indicate this uncertainty the unreliable decimal place is often underlined and written as 666.42 . Consider another example : The percentage of iron in an ore is given as 54.23 % Fe . What is the weight of iron in ...
... decimal place . To indicate this uncertainty the unreliable decimal place is often underlined and written as 666.42 . Consider another example : The percentage of iron in an ore is given as 54.23 % Fe . What is the weight of iron in ...
Página 4
... decimal place which are reliable only in the first . In the factor just considered , the errors were assumed to be additive while they might have neutralized each other , consequently , one and sometimes two uncertain figures are ...
... decimal place which are reliable only in the first . In the factor just considered , the errors were assumed to be additive while they might have neutralized each other , consequently , one and sometimes two uncertain figures are ...
Página 5
... decimal point in order to make the number conform to this system ; plus , when the decimal point has been moved to the left and minus when moved to the right . To transform numbers written in the system of the powers of ten back into ...
... decimal point in order to make the number conform to this system ; plus , when the decimal point has been moved to the left and minus when moved to the right . To transform numbers written in the system of the powers of ten back into ...
Otras ediciones - Ver todas
Términos y frases comunes
2HCl 2KCl acetic acid added AgBr AgCl amount analysis analyzed anhydride aqueous vapor arsenic atomic weight BaCl2 barium sulphate barometer boiling point bromine CaCO3 Calculate the percentage Calories carbon dioxide Chem chemical compound contains corresponding cubic centimeter decimal point degrees Baumé determined element equation equivalent error factor flask formula freezing point gases given H₂O HNO3 hydrochloric acid hydrogen iodide iodine iron kilogram liquid liter logarithm mercuric oxide mercury meters method mixed acid mixture molecular weight multiplied NaCl NaHCO3 NaOH neutralize nitric acid nitrogen normal solution obtained oleum oxalic oxygen platinum potassium chloride potassium permanganate pounds present pressure problem ratio reaction salt sample significant figures silver chloride sodium carbonate sodium chloride sodium hydroxide sodium sulphate specific gravity specific heat standard conditions substance sulphuric acid Table taken temperature thiosulphate tion titrated unit valence volume
Pasajes populares
Página 95 - Avogadro's law states that equal volumes of all gases at the same temperature and pressure contain the same number of molecules...
Página 268 - Baume Hydrometers for use with this table must be graduated by the above formula, which formula should always be printed on the scale. Atomic weights from FW Clarke's table of 1901. О - 16. Allowance for Temperature At 10° -20° Be.— 1/30° Be.
Página 9 - The logarithm of the quotient of two positive numbers is found by subtracting the logarithm of the divisor from the logarithm of the dividend. (6) The logarithm of a power of a positive number is found by multiplying the logarithm of the number by the exponent of the power. For, N" = (oT)
Página 106 - (a) Units of Capacity. — The liter, defined as the volume occupied by a quantity of pure water at 4° C. having a mass of 1...
Página 269 - Soc., vol. 57, p. 363. AUTHORITIES — WC FERGUSON; HP TALBOT. This table has been approved and adopted as a standard by the Manufacturing Chemists' Association of the United States.
Página 88 - Marriott, so named after its discoverers, is that the volume of a gas varies inversely as the pressure to which it is subjected.
Página 140 - The atomic weight (also known as the combining weight) of an element is the ratio of the weight of an atom of that element to the weight of an atom of hydrogen. Hydrogen...
Página 58 - Thus, the reduction of the value of the modulus between the melting point of ice and the boiling point of water is...