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3 years ago

What are the properties of a bandaid

Chemistry

1 answer:

8090 [49]3 years ago

4 0

Three physical properties that a band aid has is it is elastic , sticky , and has holes to keep the wound getting air .

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1. A 250g chunk of metal is heated with 400 joules of energy and the temperature goes from 20 °C to 25°C. What is its specific h

Paha777 [63]

The specific heat capacity of this chunk of metal is equal to 0.32 J/g°C.

Given the following data:

Mass of metal = 250g

Quantity of energy = 400 Joules

Initial temperature = 20°C

Final temperature = 20°C

To determine the specific heat capacity of this chunk of metal:

<h3>The formula for quantity of heat.</h3>

Mathematically, quantity of heat is given by the formula;

$Q = mc\theta$

Where:

Q represents the quantity of heat.

m represents the mass of an object.

c represents the specific heat capacity.

∅ represents the change in temperature.

Making c the subject of formula, we have:

$c = \frac{Q}{m\theta}$

Substituting the given parameters into the formula, we have;

$c = \frac{400}{250 \times (25-20)}\\\\c = \frac{400}{250 \times 5}\\\\c = \frac{400}{1250 }$

Specific heat, c = 0.32 J/g°C.

Read more on specific heat here: brainly.com/question/2834175

5 0

2 years ago

Propane(C3H8) combusts with oxygen gas. If you start with 15 grams of Propane, how many grams of carbon dioxide will be produced

skelet666 [1.2K]

mC₃H₈: 44 g/mol
mCO₂: 44 g/mol
---------------------

C₃H₈ + 5O₂ ----> 3CO₂ + 4H₂O
44g (44·3)g

44g C₃H₈ ------ 132g CO₂
15g C₃H₈ ------ X
X = (15×132)/44
X = 45g CO₂

_____
:)

4 0

3 years ago

What mass of O2 is needed to produce 4.5 moles of CO2?

Ahat [919]

Answer:

Explanation:

4 0

3 years ago

What mass of octane must be burned in order to liberate 5270 kj of heat? δhcomb = -5471 kj/mol?

katrin2010 [14]

As,
5471 kJ heat is given by = 1 mole of Octane
Then,
5310 kJ heat will be given by = X moles of Octane

Solving for X,
X = (5310 kJ × 1 mol) ÷ 5471 kJ

X = 0.970 moles of Ocatne

So, 0.970 moles of Octane will liberate 5310 kJ energy. Now changing moles to mass,
As,
Moles = mass / M.mass
Or,
Mass = Moles × M.mass
Putting values,
Mass = 0.970 mol × 114.23 g/mol

Mass = 110.83 g of Octane

6 0

3 years ago

Determine the number of atoms that are in 1.15 mol of Cl 2.

Brums [2.3K]

Answer:

Explanation: I think its 4.91 x 10^25. Im not very sure, i just multipled 1.15 mol by the molar mass of Cl 2, which was 70.9 g. Then I multiplied that by avogadro's number. sorry if im wrong

4 0

2 years ago