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alex41 [277]
4 years ago
6

1- Science that deals with the identification and quantification of the components of material systems

Chemistry
1 answer:
Elis [28]4 years ago
7 0

Answer:

Analytical science

Explanation:

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At a festival, spherical balloons with a radius of 280. Cm are to be inflated with hot air and released. The air at the festival
evablogger [386]

Answer:

8608.18 balloons

Explanation:

Hello! Let's solve this!

Data needed:

Enthalpy of propane formation: 103.85kJ / mol

Specific heat capacity of air: 1.009J · g ° C

Density of air at 100 ° C: 0.946kg / m3

Density of propane at 100 ° C: 1.440kg / m3

First we will calculate the propane heat (C3H8)

3000g * (1mol / 44g) * (103.85kJ / mol) * (1000J / 1kJ) = 7.08068 * 10 ^ 6 J

Then we can calculate the mass of the air with the heat formula

Q = mc delta T

m = Q / c delta T = (7.08068 * 10 ^ 6 J) / (1.009J / kg ° C * (100-25) ° C) =

m = 93566.96kg

We now calculate the volume of a balloon.

V = 4/3 * pi * r ^ 3 = 4/3 * 3.14 * 1.4m ^ 3 = 11.49m ^ 3

Now we calculate the mass of the balloon

mg = 0.946kg / m3 * 11.49m ^ 3 = 10.87kg

The amount of balloons is

93566.96kg / 10.87kg = 8608.18 balloons

5 0
3 years ago
Read 2 more answers
Under which condition is no work done?
Sunny_sXe [5.5K]

Answer:

D. A force pushes upon a object that stays in place.

Explanation:

7 0
3 years ago
Read 2 more answers
What mass of magnesium oxide is produced when 60g of magnesium is burnt in air?
True [87]

Answer:

The chemical equation can be written as:

2Mg+O

2

→2MgO

48 g of Mg reacts with 32 g of O

2

.

Thus, 4.8 g of Mg reacts with 3.2 g of O

2

.

Now, 32 g of O

2

forms = 80 g of MgO.

3.2 g of O

2

produces =

32

80

×3.2 = 8 g of MgO.

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3 0
3 years ago
A metal is found that has a mass of 27g and will displace 6mL of water. Calculate its density and identify the metal.
melisa1 [442]

The density of metal = 4.5 g/ml, and the metal = Titanium

<h3>Further explanation  </h3>

Density is a quantity derived from the mass and volume  

Density is the ratio of mass per unit volume  

Density formula:  

\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}

ρ = density  

m = mass  

v = volume  

mass of metal=27 g

volume = 6 ml

The density :

\tt \rho=\dfrac{27}{6}\\\\\rho=4.5~g/ml

The metal with a density of 4.5 g/ml is Titanium

3 0
3 years ago
What solid can be formed from a net diagram that has 2 congruent circles and 1 rectangle?
Serggg [28]

Answer: Option (B) is the correct answer.

Explanation:

When two circles are of same same then they are known as congruent circles.

Whereas a rectangle is a kind of parallelogram with all sides equal to 90^{o}.

Therefore, when 2 congruent circles and 1 rectangle combines then it results in the formation of a cylinder.

Thus, we can conclude that solid formed when 2 congruent circles and 1 rectangle combines will be a circle.

5 0
3 years ago
Read 2 more answers
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