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Alexus [3.1K]
3 years ago
9

Transfer 2-3 drops of each solution onto the indicator paper. Be sure to

Chemistry
1 answer:
alexira [117]3 years ago
4 0

Answer:

0.1 M HCl pH: 1-2

0.001 M HCl pH: 3-4

0.00001 M HCl pH: 5-6

Distilled Water pH: 7

0.00001 M NaOH pH: 8-9

0.001 M NaOH pH: 10-11

0.1 M NaOH pH: 12-13

Explanation:

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You need to prepare a sample containing 0.20 g of CuSo from a solution that is 10% Cuso, by mass. What mass of
Andru [333]

Answer:

Mass of solution = 2 g

Explanation:

Given data:

Mass of CuSO₄ = 0.20 g

Percent by mass = 10%

Mass of solution needed = ?

Solution:

Formula:

Percent by mass = mass of solute / mass of solution × 100

Now we will put the values.

10 = 0.20 g/ mass of solution × 100

10/ 100 = 0.20 g/ mass of solution

0.1 = 0.20 g/ mass of solution

Mass of solution =  0.20 g/ 0.1

Mass of solution = 2 g

4 0
4 years ago
1. What is the state of matter of each of these materials at room temperature? a) gold b) gasoline c) oxygen d) olive oil e) mer
ehidna [41]

Answer:

a) gold - Solid

b) gasoline - liquid

c) oxygen - gaseous

d) olive oil - liquid

e) mercury (found in thermometers) - liquid

f) aluminum - solid

Explanation:

Matter exists in three states viz: solid, gas and liquid. Note that, room temperature is a neither hot or cold temperature, which is about 20-23°C.

A) Gold is a transition metal with the symbol Au. At a room temperature, Gold, like most metals are found as SOLIDS.

B) Gasoline is a liquid mixture of refined hydrocarbons majorly used as fuels.

C) Oxygen is a chemical element with symbol O. It is a constituent of natural air, which is a mixture of different gases including oxygen. Hence, at room temperature, Oxygen is a gas.

D) Olive oil is a vegetable oil got from olives. It is composed of fats and it's a liquid at room temperature.

E) Mercury is an element with symbol Hg. It is the only metallic element found naturally (at room temperature) as a liquid. It is used in thermometers.

F) Aluminum is another chemical element with symbol Al. It is a lustrous metal that occurs as a Solid in room temperature.

8 0
3 years ago
True or False? If friction didn’t exist, an object in motion would stay in motion forever.
nata0808 [166]

Answer:

True

Explanation:

Friction is defined as the force that opposes motion when an object is sliding over a surface.

As a result of friction, all objects moving over a surface eventually come to rest over time.If we were to successfully create a friction-less surface, an object will remain in motion forever because it will encounter no opposition to its motion.

Hence, the resistance to the motion of objects over  a surface which causes the objects to come to a halt after moving over the surface for some time is called friction.

5 0
3 years ago
A 0.479 g sample of nitrogen, oxygen or neon gas occupies a volume of 265 ml at 157 kpa and 20◦c. what is the molar mass and ide
Anna11 [10]
PV = nRT
P = 157 kPa = 157 × 10³ Pa
V = 265 ml = 0.265 l
T = 20°C = 293 K
m = 0.479 g
PV•M = mRT
M = (mRT)/(PV)
M = 0.479 g × 8.314 kPa.l/(mol.K) × 293 K / (157 kPa × 0.265 l)
M ≈ 28.04579 g/mol.
Hence, the Molar Mass of Dinitrogen or Nitrogen Gas is 28 g.
7 0
3 years ago
| | | |<br> | | | |<br> | | | |<br> VVV
zubka84 [21]

Answer:the answer would be a because that's what it would talk about and is the correct answer

Explanation:yes it is correct just answer it trust me

7 0
4 years ago
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