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3 years ago

What is the periodic table element for Iron?

Chemistry

2 answers:

alexandr1967 [171]3 years ago

8 0

Answer:

Explanation:

aalyn [17]3 years ago

4 0

Iron (Fe) :))))) iron !!!!:&:&:

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Please help! <br> Fe2O3 + C → CO + Fe

Sunny_sXe [5.5K]

Fe2O3 + 3C → 2Fe + 3CO :)

3 0

2 years ago

1. Three different observers measure the melting point of a substance and agree on the

Naddik [55]

d. precise but not accurte

7 0

4 years ago

Consider a sample of a hydrocarbon (a compound consisting of only carbon and hydrogen) at 0.959 atm and 298 K. Upon combusting t

Masja [62]

Answer:

Molecular formula of hydrocarbon is: C₂H₆

Explanation:

The combusting of the hydrocarbon:

CxHy + O₂ → CO₂ + H₂O

Using gas law to obtain molar mass of the gas mixture (CO₂ + H₂O):

P/RT = n/V

Where:

P is pressure (1,208 atm)

R is gas constant (0,082 atmL/molK)

T is temperature (375 K)

n/V = 0,0393 mol/L

1,1128 g/L ÷ 0,0393 mol/L = 28,32 g/mol

Thus, average molecular weight is:

28,32 g/mol = 44,01 g/mol X + 18,02 g/mol Y

1 = X + Y

Where X is CO₂ molar percentage and Y is H₂O molar percentage.

Solving:

X = 0,397

Y = 0,603

39,7% H₂O

60,3% CO₂

With this proportion you can obtain ratio CO₂:H₂O thus:

60,3/39,7 = 1,52 So, 2 CO₂: 3H₂O

The moles of the hydrocarbon are:

PV/RT = n

P (0,959 atm)

V ( 1/5 of final volume)

T (298K)

n = 7,85x10⁻³ mol

The moles of CO₂ are:

0,0393 mol × 2 mol CO₂/ 5 mol total =0,01572.

Ratio of CO₂:CxHY =

0,01572 : 7,85x10⁻³ 2 CO₂: 1 CxHY

Doing:

1 CxHy + O₂ → 2 CO₂ + 3 H₂O

By mass balance:

1 C₂H₆ + 7/2 O₂ → 2 CO₂ + 3 H₂O

Thus, molecular formula of hydrocarbon is: <em>C₂H₆ </em>

I hope it helps!

7 0

3 years ago

Find the value of x in the triangle

myrzilka [38]

Answer:

55.52°

Explanation:

Concept tested: Sine rule of triangles

We need to know the sine rule

According to sine rule, if the three sides of a triangle are a, b and c and the corresponding angles, A, B and C

Then, $\frac{a}{SinA}=\frac{b}{SinB}=\frac{c}{SinC}$

In this case;

If we take, a = 5.7 units and A = 70°, and

b= 5 units, B = x°

Using the sine rule we can find the value of x

Therefore;

$\frac{a}{SinA}=\frac{b}{SinB}$

Then;

$\frac{5.7}{Sin70}=\frac{5}{Sinx}$

$6.0658=\frac{5}{sinx}$

$Sinx=0.8243$

Therefore, X = 55.52°

Therefore, the value of x in the triangle is 55.52°

6 0

3 years ago

Does the universe have air in it between the galxies in it

fenix001 [56]

Answer:

No it does not space does not have oxygen and air is caused by oxygen

hey but this was a really interesting question to ask tho

Explanation:

4 0

3 years ago