Chemical CalculationsD. Van Nostrand Company, 1923 - 276 páginas |
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Página 1
... indicate the location of the 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 ...
... indicate the location of the 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 ...
Página 2
... indicate the position of the 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 ...
... indicate the position of the 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 ...
Página 3
... indicate this uncertainty the unreliable decimal place is often underlined and written as 666.42 . = Consider ... indicates that the figure underscored carries some uncertainty . Another example involving the division of approximate ...
... indicate this uncertainty the unreliable decimal place is often underlined and written as 666.42 . = Consider ... indicates that the figure underscored carries some uncertainty . Another example involving the division of approximate ...
Página 5
... system to the usual system : ( a ) If no power of ten is indicated , leave the number as it stands . ( b ) If the number is written with 10+ give a number of places greater than n by one before the decimal point , APPROXIMATE NUMBERS 5.
... system to the usual system : ( a ) If no power of ten is indicated , leave the number as it stands . ( b ) If the number is written with 10+ give a number of places greater than n by one before the decimal point , APPROXIMATE NUMBERS 5.
Página 8
... indicate the number of zeros by a small subscript number . Thus 0.0000078 becomes 0.0578 . Logarithms . All positive real numbers may be regarded as powers of ten , the exponents of the powers being known as the common or Brigg's ...
... indicate the number of zeros by a small subscript number . Thus 0.0000078 becomes 0.0578 . Logarithms . All positive real numbers may be regarded as powers of ten , the exponents of the powers being known as the common or Brigg's ...
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Términos y frases comunes
according added amount analysis approximate atomic weight barium barometer Baumé boiling calcium Calculate carbon dioxide cent Chem chemical chloride coefficient combination composition compound constant contains converted corrected corresponding cubic centimeter decimal density determined difference element equal equation equivalent error example expansion expressed factor figures Find flask formula freezing point gases given gives grams heat hence HNO3 hydrochloric acid hydrogen indicate iodine iron liquid liter logarithm measured mercury method mixed mixture molecular weight molecule multiplied nitric nitrogen normal obtained occupy oxide oxygen percentage potassium pounds present pressure problem produced ratio reaction reading relative remaining represents result salt sample saturated shows silver sodium sodium hydroxide solution solving specific gravity standard substance sulphuric acid Suppose Table taken taking temperature tion titrated unit vapor volume yields
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...