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malfutka [58]
3 years ago
12

BRAINLIESTTT ASAP!! PLEASE HELP ME :)

Chemistry
2 answers:
ozzi3 years ago
4 0

the instrument used to measure the volume of a liquid, mass, length, and density is a graduated cylinder

the main 3 units of measurement in the metric system are meters, grams, and liters

Arada [10]3 years ago
4 0

The instrument used to measure the volume of a liquid is a graduated cylinder i believe.

The ones i know are:

Work: Joules

Power: Watts

Force: Newtons

Time: Usually Secs

Distance: Usually meters

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If you want 370 mL of 2.3 M AgNO3 solution, how many grams of AgNO3 do you need?
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dont use that link its bad

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What is a common feature of elements in group 1, group 2 and group 3?​
Papessa [141]

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all of them have seven valence electron

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Someone said that we can not use sulfric acid to prepare PbSO4 .
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A. we can use sulfuric acid to prepare PbSO4

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Which of the following is a balanced equation?<br><br>Select one:<br>a. A<br>b. B<br>c. C<br>d. D​
Phantasy [73]

Answer:

B

Explanation:

Balanced equations have the same number of elements on both sides. If the number of elements are equal to each other for every element in the equation on both sides, then the equation is balanced.

Important concept : The big number before an element or compound represents how many molecules of that compound or element there are in a reaction. To find the number of atoms of each element you multiply the coefficient by the subscript ( small number ) which represents the number of atoms of that element in each molecule. Ex. 3H2O. There is a coefficient of 3 meaning that there are 3 molecules of H2O. There is a subscript after H meaning there are 2 atoms of hydrogen in each molecule. To find the total number of atoms we multiply the subscript of hydrogen by the coefficient of the whole molecule. 3 * 2 = 6 , so there are a total of 6 atoms of hydrogen in 3H2O

A) Cu + 2AgNO3 ==> CuNO3 + 2Ag

                    1   Cu  1

                    2   Ag  2

                     2   N  1

                     3  O   3

The amount of nitrogen atoms is different on both sides of the equation therefore this is not a balanced equation

B) CCl4 + O2 ==> CO2 + 2Cl2

                     1  C  1

                     4  Cl  4

                     2  O  2

The number of atoms of each element is the same on both sides of the equation therefore this is the balanced equation, however lets check the other answer choices just in case.

C)  2K + H2SO4 ==> K2SO4 + 2H2

                        2  K   2

                        1   H   4

                        1   S    1

                        4  O   4

The number of Hydrogen atoms are different on each side of the equation therefore this is not a balanced equation.

D) 2Al2O3 ==> 2Al + 3O2

              4  Al  2

              6  O  6
There are a different amount of aluminum atoms on both sides of the equation therefore this is not a balanced equation.

               

3 0
2 years ago
Which type of energy uses the photoelectric effect?
ikadub [295]

Answer:

My lovely people the answer is SOLAR

Explanation:

i just know

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