All categories

2 years ago

What are 2 instruments used to test for conductivity

Chemistry

1 answer:

Triss [41]2 years ago

6 0

Answer:

Your answer is probe and a meter.

Explanation:

Hope it helps

Good Luck

You might be interested in

Aqueous solutions of sodium sulfide and copper(II) chloride are mixed together. Which statement is correct? a.Both NaCl and CuS

Nostrana [21]

Answer:

The correct state for the answer is c.

Only CuS will precipitate from solution

Explanation:

We analyse the compounds for the reaction and we write the equation:

Na₂S(aq) + CuCl₂(aq) → Products

For this case, the products are NaCl and CuS. The complete balanced reaction is:

Na₂S(aq) + CuCl₂(aq) → CuS(s) ↓ + 2NaCl(aq)

When the sulfide bond to the cation Cu²⁺ it makes a precipitate (s)

Salts from chlorides are soluble except for the Ag⁺, Pb⁺ or Cu⁺

Salts from S⁻² which are soluble, are found in the group 2 of the Periodic Table (Ca²⁺, Ba²⁺, Mg²⁺)

The correct state for the answer is c.

3 0

4 years ago

uysha [10]

C......…..……...............

5 0

3 years ago

Consider the reaction of KOH with H3PO4 to form K3PO4 and H2O. If 5.38 g H3PO4 is reacted with excess KOH and 7.97 g of K3PO4 is

balu736 [363]

Answer:75%

Explanation:

First, the balanced reaction equation must be written out clearly as a guide to solving the problem. The molar masses of H3PO4 and K3PO4 are then calculated as they will be consistently required in solving the problem. The theoretical yield is obtained from the amount of H3PO4 reacted. Since 1 mole of H3PO4 yields 1 mole of K3PO4, 0.05 moles of H3PO4 yields 0.05 moles of K3PO4. The mass of K3PO4 is produced is then the product of 0.05 and it molar mass hence the theoretical yield. The % yield is calculated as shown.

7 0

3 years ago

The combustion of liquid methanol has a change in enthalpy of -1278 kJ. How much energy will you get from burning 245.0 g of met

Nookie1986 [14]

Answer : 9773 kJ

Explanation:

Exothermic reactions are defined as the reactions in which energy of the product is lesser than the energy of the reactants. The total energy is released in the form of heat and $\Delta H$ for the reaction comes out to be negative.

To calculate the moles :

$\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}$

$\text{Moles of methanol}=\frac{245.0g}{32.04/mol}=7.647moles$

Given : Change in enthalpy on combustion of 1 mole of methanol = -1278 kJ

According to stoichiometry :

1 mole of methanol produce energy = 1278 kJ

Thus 7.647 moles of methanol produce energy = $\frac{1278}{1}\times 7.647=9773kJ$

Thus 9773 kJ of energy is produced from burning 245.0 g of methanol in excess oxygen

3 0

3 years ago

Liquids do not have the energy to overcome the ___ and move to the gaseous state.

Ugo [173]

Answer - Inter-molecular attractions

Explanation-

As we know everything around us is made up of matter that means everything has molecules as their basic structure. The state of anything is decided by the spaces between the molecules.

The state of the objects that have strong inter-molecular attractions a solid and gradually the lesser will be in state of liquid and gas. The attraction between the molecules is overcome only when a certain amount of energy is provided from outside.

4 0

3 years ago