1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
polet [3.4K]
3 years ago
9

Label the following as a pure substance or a mixture.

Chemistry
2 answers:
Zigmanuir [339]3 years ago
6 0

Answer: a mixture

Explanation:

Snezhnost [94]3 years ago
5 0

Answer:

b

Explanation:

can you help ,meeeeee

You might be interested in
WILL GIVE BRAINYEST! please help
RoseWind [281]
The answer is c i need brainlyest plz 
5 0
4 years ago
Alkaline batteries are non-rechargeable.<br> Why do alkaline batteries eventually stop working?
scoray [572]

Answer:

Alkaline batteries stop working when all of the manganese dioxide has been converted.

Explanation: Hope it helps you :)))

Have a good day

4 0
2 years ago
A 155.0 g piece of copper at 128 oC is dropped into 250.0 g of water at 17.9 oC. (The specific heat of copper is 0.385 J/goC.) C
Mamont248 [21]

Answer:

T_{eq}=23.85^oC

Explanation:

Hello,

In this case, as the copper's heat loss is gained by the water, the following energetic relationship is:

\Delta H_{Cu}=-\Delta H_{H_2O}

Therefore the equilibrium temperature shows up as:

m_{Cu}Cp_{Cu}(T_{Cu}-T{eq}) = m_{H_2O}Cp_{H_2O}(T_{eq}-T_{H_2O})\\\\T_{eq}=\frac{m_{Cu}Cp_{Cu}T_{Cu}-m_{H_2O}Cp_{H_2O}T_{H_2O}}{m_{Cu}Cp_{Cu}-m_{H_2O}Cp_{H_2O}} \\

Thus, by knowing that water's heat capacity is 4.18J/g°C, one obtains:

T_{eq}=\frac{155.0g*0.385\frac{J}{g^oC}*128^oC+250.0g*4.18\frac{J}{g^oC}*17.9^oC}{155.0g*0.385\frac{J}{g^oC}+250.0g*4.18\frac{J}{g^oC}}=23.85^oC

Best regards.

6 0
3 years ago
Read 2 more answers
Surface tension explains which of the following
dexar [7]
I'm pretty sure the answer is 1. I and III
3 0
3 years ago
Read 2 more answers
Determine the molarity of 1.2 mol KCl in 1.1 L of a solution?
victus00 [196]

Answer:

1.1 M

General Formulas and Concepts:

  • Molarity = moles of solute / liters of solution

Explanation:

<u>Step 1: Define variables</u>

1.2 mol KCL

1.1 L of solution

M = unknown

<u>Step 2: Solve for Molarity</u>

  1. Substitute:                    M = 1.2 mol/1.1 L
  2. Evaluate:                       M = 1.09091

<u>Step 3: Check</u>

<em>We are given 2 sig figs. Follow sig fig rules.</em>

1.09091 M ≈ 1.1 M

7 0
3 years ago
Other questions:
  • What is the theoretical yield of vanadium, in moles, that can be produced by the reaction of 1.0 mole of V2O5 with 4.0 moles of
    8·1 answer
  • Which of the following was one result of el niño that occurred in 1997-1998
    7·2 answers
  • Which is not a name to describe global winds A) Polar Easterlies B) Prevailing Westerlies C) Trade Winds D) Tropical Northerlies
    10·2 answers
  • What is the effect of tap water, sea water, and rainwater on the rusting rate of iron?
    9·1 answer
  • calculate the speed of an electron if its de broglie wavelength is twice its displacement in one second
    15·1 answer
  • A volume of 5.0 L of gas at a temperature of 25°C is cooled to a temperature of -120°C at constant pressure. What is the new vol
    13·1 answer
  • 5. A study of the system, 4 NH3(g) + 7 O2(g) 2 N2O4(g) + 6 H2O(g), was carried out. A system was prepared with [NH3] = [O2] = 3.
    14·1 answer
  • Comparing Mirrors
    13·2 answers
  • What did Thomson’s and Rutherford’s experiments have in common?
    12·1 answer
  • In the United States, the primary agents of socialization include
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!