One liter is unit of volume, and one kilogram is the unit of weight. The formula between them is m=ρv, where m is mass, ρ is density and v is volume.
Liters are not equal to grams, liters are unit of volume, and kilograms are units of mass.
One liter cannot be directly converted into kilograms, depending on the density of the liquid.
Let's take water for example. The maximum density of water is 1* 103kg/m3 at 3.98℃. At 0℃, the density of water is 0.99987* 103 kg/m3, generally 1g/cm? As the density calculation of water. If you want to know how many kilograms a liter of water is equal to, you can use the mass density formula m = ρ v to convert it, so the mass of a liter of water is: 1L* 1g/cm? = 1000cm？ * 1g/cm？ = 1000g= 1kg, that is, one liter of water is equal to 1kg.
Liters and kilograms are not two convertible units. A liter is a unit of capacity, while a kilogram is usually a unit of weight. For example, for water, one liter is equal to one kilogram. For others, you can change this conversion formula to calculation: kilogram = density * liter.
How many kilograms is a liter of gasoline depends on the gasoline number: a liter of 90 # gasoline is 0.72 kilograms; No.93 gasoline is 0.73 kg per liter; No.97 gasoline is 0.737 kg per liter. The English name of gasoline is gasoline (USA)/petroleum (UK). It is a transparent liquid with flammable appearance, and its distillation range is 30℃~ 220℃. Its main components are C5 ~ C 12 aliphatic hydrocarbons and naphthenes, and a certain amount of aromatic hydrocarbons. Gasoline has a high octane number (anti-knock combustion performance), which can be divided into 90 #, 93 # and 93 # according to the octane number. Gasoline is a blend of straight-run gasoline, catalytic cracking gasoline and catalytic reforming gasoline obtained from petroleum refining with high octane number components, which is mainly used as fuel for automobile ignition internal combustion engines.
Universal unit conversion:
1, length unit conversion:
1 km = 1 000m1m = 10 decimeter.
1 decimeter =10cm1m =10cm.
1 cm = 10/0mm
2, area unit conversion:
1 km2 = 100 hectare
1 ha = 1 10,000 m2
1 m2 = 100 square decimeter
1 square decimeter = 100 square centimeter
1 cm2 = 100 mm2
3, the body (volume) product unit conversion:
1 m3 = 1000 cubic decimeter
1 cubic decimeter = 1000 cubic centimeter
1 cubic decimeter = 1 liter
1 cm3 = 1 ml
1 m3 = 1000 liter
4, weight unit conversion:
1 ton = 1000 kg
1 kg =1000g
1 kg = 1 kg
5. RMB unit conversion:
1 yuan = 10 angle.
1 angle = 10 point
1 yuan = 100 integral.
6. Time unit conversion:
1 century = 100 1 year =65438+ February.
The big month (3 1 day) includes:1\ 3 \ 5 \ 7 \ 8 \10 \ 65438+February.
Abortion (30 days) includes: April \ June \ September \165438+1October.
February 28th in a normal year and February 29th in a leap year.
There are 365 days in a normal year and 366 days in a leap year.
1 day =24 hours 1 hour =60 minutes.
1 minute =60 seconds 1 hour =3600 seconds.
1 century = 100 year; * 1 year = average number of years of 365 days; * One year =366 days leap year
January, Wednesday, Friday, July, August, October and December are big months, with 3 1 day.
Four, six, nine and eleven are abortions. Abortion lasts for 30 days.
There are 28 days in February in a normal year and 29 days in February in a leap year.
1 day = 24 hours * 1 hour =60 minutes * 1 minute =60 seconds.
A complete set of commonly used formulas for primary school mathematics (formulas for calculating quantitative relations);
Unit price × quantity = total price?
Single output × quantity = total output
Speed × time = distance
Work efficiency × time = total workload.
Appendix+Appendix = and one addend = and+another addend.
Minus-Minus = Difference?
Subtraction = minuend-difference
Negative = negative+difference
Factor × factor = product One factor = product ÷ another factor.
Divider = quotient divisor = dividend = quotient
Dividend = quotient × divisor
Division with remainder: dividend = quotient × divisor+remainder
Special number:
1. Maximum common divisor:
Several numbers can be divisible by the same number at the same time. This number is called the greatest common divisor of these numbers. (or the common divisor of several numbers is called the common divisor of these numbers. The largest one is called the greatest common divisor. )
2, prime number:
The common divisor is only 1, which is called a prime number.
3. Least common multiple:
The common multiple of several numbers is called the common multiple of these numbers, and the smallest is called the least common multiple of these numbers.
4. Score:
Comprehensive score:
Fractions with different denominators divided into fractions with the same denominator equal to the original fraction are called total scores. (Common divisor is the least common multiple)
About integral:
Changing a fraction into an equal fraction with smaller numerator and denominator is called a reduced fraction. (The greatest common divisor is used for divisor)
The simplest score:
A fraction whose numerator and denominator are prime numbers is called simplest fraction. At the end of the score calculation, the score must be converted into the simplest score. Numbers in units of 0, 2, 4, 6 and 8 can all be divisible by 2, that is, they can be subtracted by 2. A number with a bit of 0 or 5 can be divisible by 5, that is, it can be subtracted by 5. Pay attention to the use of contracts.
5. Even and odd numbers:
A number divisible by 2 is called an even number. Numbers that are not divisible by 2 are called odd numbers.
6. Prime number (prime number):
If a number has only 1 and two divisors of itself, it is called a prime number (or prime number).
7. Composite number:
If a number has other divisors besides 1 and itself, it is called a composite number. 1 is neither prime nor composite.
8. Interest = principal × interest rate × time (time is usually in years or months, which should correspond to the unit of interest rate).
9. Interest rate:
The ratio of interest to principal is called interest rate. The ratio of interest to principal for one year is called annual interest rate. The ratio of interest to principal in January is called monthly interest rate.
10, natural number:
Integers used to represent the number of objects are called natural numbers. 0 is also a natural number.
1 1, cyclic decimal:
A decimal, starting from somewhere in the decimal part, and one or several numbers are repeated in turn. Such decimals are called cyclic decimals. For example, 3. 14 14 14 ...
12, acyclic decimal:
A decimal, starting from the decimal part, is called acyclic decimal without a number or several numbers repeating in turn. Such as 3. 14 1592654. ...
13, infinite acyclic decimal:
A decimal, from the decimal part to the infinite digits, is called an infinite acyclic decimal without one number or several numbers repeating in turn. Such as 3. 14 1592654. ...
Arithmetic:
1, additive commutative law, two numbers are added to exchange addends, and the sum is unchanged.
2, the law of addition and association, three numbers add, first add the first two numbers, or first add the last two numbers, then add the third number, and the sum is unchanged.
3. Multiplication and exchange law, when two numbers are multiplied, the position of the exchange factor remains unchanged.
4, the law of multiplication and association, the multiplication of three numbers, first multiply the first two numbers, or multiply the last two numbers first, and then multiply the third number, their products are unchanged.
5, the law of multiplication and distribution, two numbers multiplied by the same number, you can multiply the two addends by this number, and then add the two products, the result is unchanged. Such as: (2+4) × 5 = 2× 5+4× 5.
6, the nature of division, in division, the dividend and divisor at the same time expand (or shrink) the same multiple, the quotient remains unchanged. Divide by any number that is not.
Simple multiplication, multiplicand, multiplication with O at the end of multiplier, you can multiply the one before O first, zero does not participate in the operation, and then add a few zeros at the end of the product.
7. What is an equation? An equation in which the value on the left of the equal sign is equal to the value on the right of the equal sign is called an equation.
Basic properties of the equation:
Both sides of the equation are multiplied (or divided) by the same number at the same time, and the equation still holds.
8. Equations are equations with unknowns.
9. Fraction is a number that divides the unit "1" into several parts on average, indicating such a part or several points.
10, addition and subtraction of score:
Add and subtract fractions with the same denominator, only add and subtract numerators, and the denominator remains the same. Fractions of different denominators are added and subtracted, first divided, then added and subtracted.
1 1, comparison of scores:
Compared with the fraction of denominator, the numerator is large and the numerator is small. Compare the scores of different denominators, divide them first and then compare them; If the numerator is the same, the denominator is big and small.
12. Fractions are multiplied by integers, and the product of the multiplication of fractions and integers is a numerator, and the denominator remains unchanged.
13, the fraction is multiplied by the fraction, the product of molecular multiplication is the numerator, and the product of denominator multiplication is the denominator.
14, the fraction divided by an integer (except 0) is equal to the fraction multiplied by the reciprocal of this integer.
15, true fraction: the fraction with numerator less than denominator is called true fraction.
16. False fraction: the fraction with numerator greater than denominator or numerator equal to denominator is called false fraction. False score is greater than or equal to 1.
17, with fraction: write the false fraction as an integer, and the true fraction is called with fraction.
18, the basic nature of the fraction: the numerator and denominator of the fraction are multiplied or divided by the same number at the same time (except 0), and the size of the fraction remains unchanged.
19, a number divided by a fraction equals this number multiplied by the reciprocal of this fraction.
20. The number A divided by the number B (except 0) is equal to the reciprocal of the number A multiplied by the number B..