Chemical formula and literal expression of carbon dioxide produced by reaction of calcium carbonate and dilute hydrochloric acid?

Chemical formula and literal expression of carbon dioxide produced by reaction of calcium carbonate and dilute hydrochloric acid?

CaCO3 + 2HCl = CaCl2 + H2O + CO2 (rising sign), calcium carbonate + hydrogen chloride = calcium chloride + water + CO2

A literal expression or chemical equation for the reaction of carbon dioxide with water to form acids

CO2+H2O=H2CO3

Urgent! Several problems in solving the common factor method
one
What is the common factor of (x + Y-Z) (X-Y + Z) - (y + z-x) (z-x-y)
two
Why there is no common factor for the square of 2XY + 3Y, and why the coefficient can't be explained
three
There is no common factor in each group of Polynomials: say reason
Ax BX and by ay 6 XY + 8 x squared y and - 4x-3
AB AC AB BC (a-b) 3x and the square y of (B-A)
Speed, simple and easy to understand reason, will add points!
2. Change to the sum of squares of 2XY + 3 y, x + 2XY + y. who can't use the common factor method to decompose the reason

1, (x + Y-Z) (X-Y + Z) - (y + z-x) (z-x-y) = (x + Y-Z) (X-Y + Z) + (y + z-x) (x + Y-Z) = (x + Y-Z) (X-Y + Z + y + z-x) = 2Z (x + Y-Z) 2,2xy + 3 y & sup2; = y (2x + 3Y) x + 2XY + y = (x + y) & sup2; we can't use the common factor method 3, ax BX = x (a-b) and by-ay = - Y (a-b)

What are the frequency probabilities and frequency estimates

Frequency is the number of times to complete periodic changes in a unit time. It is a quantity to describe the frequency of periodic movements. It is usually represented by the symbol f or u, and the unit is one second. Probability, also known as probability, chance, probability or possibility, is the basic concept of probability theory. Probability is a measure of the probability of the occurrence of random events

Frequency and probability
Toss two coins at the same time and mark "one positive and one negative" (not in order) as one result. How many different results are there? Necessary!

There are four possible results: positive, negative, anyway, negative
There are two kinds of positive and negative
Therefore, it can be understood as three results, but the opportunity is not equal

Frequency, definition of frequency
Please give an easy to understand answer

Frequency: the number of times a data appears in a group of data
Frequency: the probability of a data appearing in a group of data (commonly expressed as percentage)

The difference between frequency distribution histogram and frequency distribution histogram

Frequency refers to the number of the same cases in a sequence. Frequency is the percentage obtained by dividing the frequency by the total number

What is the difference between the ordinates of frequency distribution histogram and frequency distribution histogram?

Frequency distribution histogram ordinate: frequency / group distance frequency distribution histogram ordinate: frequency is the same for all others

All formulas for Grades 1 to 6
Anyway, as long as you have learned all the formulas from grade 1 to grade 6, what's the title of Volume 2 of grade 6? The length of a square is 10 cm. Cut it into a cylinder. What's the volume of the cylinder and how to calculate it?

Four up
Rectangle area = length × width
Square area = side length & sup2;
Five up
Triangle area = bottom × height △ 2
Area of parallelogram = base × height
Trapezoid area = (upper bottom + lower bottom) × height △ 2
Five times
Cuboid volume = length × width × height
Cube volume = edge length & sup3;
Cuboid surface area = 2 (L × W + W × H + L × h)
The surface area of cube = 6.edge length & sup2;
Six up
Circle area = π · radius & sup2;
Six times
Volume of cylinder = bottom area × height
Surface area of cylinder = 2.bottom area + side area
Cone volume = 1 / 3 · bottom area × height
Take my answer!

The daily profit and loss of a convenience store in a week are as follows (the surplus is positive)
128.3 yuan - 25.6 yuan - 15 yuan, 25 yuan - 7 yuan, 36.5 yuan - 98 yuan
How about the profit and loss of a week?

Profit, 128.3-25.6-15 + 25-7 + 36.5-98 = 44.2 yuan