If you have loratadine at home, you can use it!
Junior high school science problem, urgent! 100g =0. 1 kg
F float =G object = 0.1kg×10n/kg =1n
Suspension refers to the state of an object at rest. And after you press this object, Because its own gravity is less than buoyancy, it will float.
The suspension, sinking or floating of an object depends on its density. And you changed the mass and volume of the object together. But the density will not change.
That's the answer. If you don't understand. You can tell me your QQ. I will add you. And then continue to explain to you.
Urgent, high school chemistry, online, etc. In view of hydrochloric acid dripping into it, hydrochloric acid is a small amount. According to the reaction sequence, it involves reactions:
1> HCl+NaOH=NaCl+H2O;
2> HCl+Na2CO3=NaHCO3+NaCl;
3> HCl+NaHCO3=NaCl+H2O+CO2;
Let the molar amount of sodium hydroxide be n 1, the molar amount of sodium carbonate be n2, and the molar amount of sodium bicarbonate be n3.
It can be seen from the figure that CO2 starts to be generated when 1) reaches point A, and the hydrochloric acid (0.1mol/l× 25ml = 0.025ml) at point A is the total molar amount of sodium hydroxide and sodium carbonate: n 1+n2=0.025;
2) Hydrochloric acid from point A to point B is consumed on sodium bicarbonate, which is composed of two parts (produced by sodium carbonate and originally existing). The molar amount of hydrochloric acid from point A to point B is 0. 1×(45-25)=0.02mol, which is the total molar amount of sodium carbonate and sodium bicarbonate: n2+n3=0.02;
3) It is known that the total amount of the three substances is 2.5g: 40× n1+106× N2+84× n3 = 2.5;
Three simultaneous formulas can be obtained: n 1=0.0 15mol, n2=0.0 1mol and n3=0.0 1mol.
So the mass fraction of Na2CO3 is:106× 0.01/2.5 = 0.424, that is, 42.4%.
I haven't done it for a long time. I don't know if it's right. .
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High school chemistry! Urgent! Wait online! More than 25, the higher the temperature, the more active the electrolyte.
Shake hands on the Great Wall! La la la la la la ...
Hand in hand, hand in hand, is a beautiful ark!
Whether you are a new friend or an old friend, we all hold hands.
They are all good friends. Whether from a big city or a small ravine,
Shake hands on the Great Wall, and there is a warm current in my heart.
La la la la la la ...
Holding hands is a great wall of friendship;
Holding hands is an oasis of joy.
La la la la la la ...
Holding hands is an oasis of joy.
La la la la la la ...
Hand in hand, hand in hand, is a beautiful ark!
No matter through winter and summer or spring and autumn, our friendship
Forever and ever. Whether you are heading for the horizon or the corner of the sea,
Always remember to shake hands on the Great Wall.
La la la la la la ...
Holding hands and holding hands is a loving world;
Holding hands, holding hands, is a beautiful ark.
La la la la la la ...
Holding hands, holding hands, is a beautiful ark.
Beautiful ark!
There is a process to calculate 36 35 ′× 3. It is urgent to calculate 36 35 ′× 3.
=（36°+35′）×3
= 108°+ 105′
= 109°45′
There is a problem with renting a house! People with similar experiences saw it.
When I left Shanghai, it was only a day away. The landlord just asked me to pay the rent. I said I wouldn't give you any money if I slept in the street. You gave me a month's rent back, and he said I used the kitchen washing machine for air conditioning and so on. I was very upset at that time, and I knocked him down with one punch, with blood all over my face. I called the police. I was detained for one day, and the fine plus medical expenses was more than 1000. He didn't refund the rent for one month. When I went back to the rental place, I found that the landlord had thrown all my things out, including more than 8,000 RMB in foreign currency cash, and I lost a lot of things.
Then I spent 5 thousand yuan to find someone. . . . . You know.
I regret it now, and I don't have to be common sense with such people. Take the credentials and find an intermediary to let them solve it.
I hope I can bear more injuries and not hurt others.
High school history for help! Urgent! "The oppression of domestic feudal forces: exorbitant taxes and extortion, massive domestic debts and indiscriminate issuance of paper money" Because Jiang Gong's * * * is the representative of feudal forces and bureaucratic capitalism, it is said to be oppressed by feudal forces. The first victory in the socialist revolution was the October Revolution, and February was the bourgeois-led bourgeois revolution. The temporary establishment of * * * is also bourgeois, so only October is the first socialism. Geming
Q: Editing graphics in java is as follows *** public class Graph {
public static void main(String[] args) {
TODO Auto-generated method stub
for(int i = 0; i < 5; i++){
for(int j = 0; j < 3; j++){
System.out.print("*");
}
System.out.println();
}
}
}
It's not difficult. Please adopt it.