When the mass, specific heat capacity and initial temperature of two different liquids are M1, M2, C1, C2, T1 and T2 respectively, and T2 > T1, what is the temperature after mixing

Let the temperature after mixing be t,
Because Q suction = q discharge
c1m1(t-t1)=c2m2(t2-t)
So t = (c1m1t1 + c2m2t2) (c1m1 + c2m2)

1 mol of any substance contains a molecule of 6.02 times ten to the 23rd power?

Wrong, some substances are ionic crystals or metallic crystals, there are no molecules, only particles

There are only 6 × 1023 molecules in substance A, and there are 12 × 1023 atoms in these molecules, so substance a must be ()
A. Simple substance B. pure substance C. mixture D. inconclusive

If there are 6 × 1023 molecules in substance A, and there are 12 × 1023 atoms in these molecules, the average number of atoms in each molecule is 2. If it is a simple substance, O2 meets the requirements, so it is possible for substance A and it is possible for substance B. if it is a mixture, such as a mixture of H2 and O2, it meets the requirements, so D is selected

A mole of any substance has about 6.02 times 10 atoms to the 23rd power, right?

No, 6.02 times 10 of 23 is 1mol, but many substances have more than one atom, such as H2O, SiO2 have three atoms
6.02 times 10 of 23 is 3 mol atoms

1 mol C contains about -- carbon atoms; 3.01 * 10 is 23 carbon atoms; 1 mol H2 contains about -- H, about -- protons
The amount of Oh ˉ with 23 protons of 5.418 * 10 mol

1mol C contains about 6.02 * 10 ^ 23 carbon atoms
The amount of 3.01 * 10 ^ 23 carbon atoms is 0.5mol
1mol H2 contains about 2mol h and 1.204 * 10 ^ 24 protons
The amount of Oh? Containing 5.418 * 10 ^ 23 protons is 0.1 mol

How many meters is 3.2 microns?

It's 3.2 * 10-6 cubic meters
The one upstairs is nano ha

1 micron= Rice= CM= Decimeter= Mm; 1 mm 2= ; 1 m3= Cm 3

∵ 1 μ M = 0.000001 M = 0.0001 cm = 0.00001 decimeter = 0.001 mm; ∵ 1 μ M = 10-6 M = 10-4 cm = 10-5 decimeter = 10-3 mm. ∵ 1 mm2 = 0.000001 m2; ∵ 1 mm2 = 10-6 m2. ∵ 1 m3 = 1000000 cm3; ∵ 1 m3 = 106 cm3. Answer: 1 μ M = 10-6 M = 10-4 cm = 10-5 decimeter = 10-3 mm; 1 mm2 = 10-6 m2; 1 m3 = 106 cm3

How many meters is 0.3 micron

0.3 μ M = 3 * 10 - 7 m

25m = () m, 3.5cm = () m, 0.7m = () mm, 800000 nm = () cm, 21000 μ M = () M
Using scientific counting method

25 decimeters = (2.5) meters, 3.5 centimeters = (3.5 * 10 ^ - 2) meters, 0.7 meters = (7 * 10 ^ 2) mm, 800000 nanometers = (8 * 10 ^ - 2) cm, 21000 microns = (2.1 * 10 ^ - 2) meters

The parabola y = ax2-5ax + 4 passes through the three vertices of △ ABC, the BC ‖ X axis is known, the point a is on the X axis, the point C is on the Y axis, and AC = BC
If the point P is a moving point on the x-axis, is there an isosceles triangle △ PAB? If so, find out all the P coordinates that meet the conditions. If not, explain the reason

If the coordinates of point a and B are (m, 0) and (n, q), then the coordinates of point C are (0, q)
Then substituting the coordinate of point C into the parabola y = ax2-5ax + 4, we get P = 4
When y = 0, then ax (X-5) = 0, x = 0, x = 5, so n = 5
And because AC = BC
So m ^ 2 + Q ^ 2 = n ^ 2, that is, m ^ 2 + 16 = 25, so m = 3
Substituting the coordinates of point a into the parabola, 9a-15a + 4 = 0, that is, a = 2 / 3
So the parabola is y = 2 / 3x ^ 2-10 / 3x + 4, and the coordinates of points a, B and C are (3,0), (5,4), (0,4) respectively
Let △ PAB be an isosceles triangle, and let the coordinates of point p be (Z, 0)
PA^2=(3-Z)^2 PB^2=16+(5-Z)^2 AB^2=(5-3)^2+16=20
When PA = Pb, then (3-z) ^ 2 = 16 + (5-Z) ^ 2 gives z = 8
When PA = AB, then (3-z) ^ 2 = 20, the solution is Z = 3 + 2 √ 5 or Z = 3-2 √ 5
When Pb = AB, then the solution of 16 + (5-Z) ^ 2 = 20 is Z = 3 (rounding off) or Z = 7
In summary, there exists an isosceles triangle △ PAB, and the coordinates of points P satisfying the conditions are (8,0), (3 + 2 √ 5,0), (3-2 √ 5,0) and (7,0) respectively
If you have any questions,

When the mass, specific heat capacity and initial temperature of two different liquids are M1, M2, C1, C2, T1 and T2 respectively, and T2 > T1, what is the temperature after mixing