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
V125BC [204]
3 years ago
7

Which substance would cool down faster concrete or iron

Chemistry
1 answer:
Olin [163]3 years ago
7 0
Personal experience from Ag Mech classes-Concrete cools faster than metal.
You might be interested in
How much is 35° C in F?
Furkat [3]
It's 95 F
The formula is the following:
T
4 0
3 years ago
Each axis on a graph should be:<br> equal<br> O numbered<br> Olabeled<br> vertical
Anni [7]
I think it’s Labeled or numbered....
6 0
3 years ago
Which law of thermodynamics states that the entropy
Arte-miy333 [17]

Answer:second law of thermodynamics

Explanation:the second law of thermodynamics states that the total entropy of an isolated system can never decrease over time and is constant if only if all processes are reversible.

6 0
3 years ago
Suppose now that you wanted to determine the density of a small crystal to confirm that it is phosphorus. From the literature, y
denis23 [38]

Answer:

Volume of CHCl_3   = 15.31 mL

Volume of CHBr_3 = 4.69 mL

Explanation:

Given that:

the density of the mixture = 1.82 g/mL

From the density of the pure samples

The density of CHCl_3 = 1.492 g/mL

The density of CHBr_3 = 2.890 g/mL

The total volume of the liquid mixture = 20.0 mL

Suppose the volume of  CHCl_3 = P ml

and the volume of CHBr_3 = Q ml

the sum of their volumes should be equal to the total volume of the mixture

P \ ml + Q \ ml = 20 ml  ----- (1)

However, we know that Density = mass/volume

∴ mass = density × volume

The equation can now be expressed as:

\mathtt{(Density \ of  \ CHCl_3 \times Vol. \ of  \ CHCl_3 ) + (Density  \  of \  CHBr_3  \times \ volume \ of \ CHBr_3)} = \mathtt{ (Density  \ of \ mixture \times volume \ of \ the \ mixture)}

1.492 g/mL × P mL + 2.890 g/mL × Q mL = 1.82 g/mL × 20 mL  ---- (2)

From equation (1) ;

let Q = 20 - P

The replace the value of P into equation (2)

1.492 g/mL × P mL + 2.890g/mL × (20 - P) mL = 1.82 g/mL × 20 mL

1.492 P g + 57.8g - 2.890 P g =  36.4g

1.492 P g - 2.890 P g = 36.4g - 57.8g

-1.398 P g = -21.4g

P = -21.4g/-1.398g

P = 15.31 mL

Q = 20 - P

Q = (20 - 15.31) mL

Q = 4.69 mL

∴

Volume of CHCl_3   = 15.31 mL

Volume of CHBr_3 = 4.69 mL

6 0
3 years ago
The matter through which waves travel is called a/an​
sweet [91]

Answer:

A medium.

<h3>Explanation:</h3>

It's the material the wave is travelling through.

5 0
3 years ago
Other questions:
  • Given that an activity's normal time and cost are 10 days and $400, respectively, and its crash time and cost are 5 days and $80
    7·2 answers
  • A protein subunit from an enzyme is part of a research study and needs to be characterized. A total of 0.150 g of this subunit w
    12·1 answer
  • What is caused by the heating and coolingof the earth
    7·1 answer
  • What is the emperical formula for a compound containing 68.3% lead, 10.6% sulfur, and the remainder oxygen? a. Pb2SO4 b. PbSO3 c
    14·2 answers
  • Calcium carbonate () is 34.5% Ca by mass. In a 418 g sample of , how many grams of calcium are present?
    9·1 answer
  • Write the equilibrium constant: Pb3(PO4)2(s) = 3Pb2+ (aq) +<br> 2PO2 (aq)
    14·1 answer
  • Part C<br> What is a useful application for this new material?
    11·2 answers
  • A sample of oxygen gas occupies a volume of 160 liters at 364 K. What will be the volume of the gas when the temperature drops t
    10·1 answer
  • Kp for the reaction CO2(g) + C(s) --- 2CO(g) is 1.47 at 727°C. Calculate Kc at this temperature.
    15·1 answer
  • 2. Density is a physical property of a molecule that's measured as mass per unit volume Given that deasity is
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!