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3 years ago

What elements makeup Mars' atmosphere?

Chemistry

1 answer:

Genrish500 [490]3 years ago

8 0

Answer:

Carbon dioxide or co^2

Explanation:

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How many atoms are in 26.8 g Fe

Tatiana [17]

Answer:

2.881x10^23 atoms

Explanation:

From the studies of Avogadro's hypothesis, we discovered that 1mole of any substance contains 6.02x10^23 atoms.

Therefore 1mole of Fe contains 6.02x10^23 atoms.

Molar Mass of Fe = 56g/mol

56g of Fe contains 6.02x10^23 atoms.

Therefore, 26.8g of Fe will contain = (26.8x6.02x10^23) / 56 = 2.881x10^23 atoms

6 0

3 years ago

The instructions for the experiment direct you to prepare 30 mL of 1.5 M HCl solution. In the chemical closet, you locate an 18M

MAVERICK [17]

The volume of the 18M HCl needed to make the solution will be 2.5 mL.

<h3>Dilution</h3>

According to the dilution principle, the number of moles of solutes in a solution before and after dilution must remain the same.

Since, mole = molarity x volume

Thus, molarity x volume before dilution = molarity x volume after dilution.

Mathematically, the equation is written as: m1v1 = m2v2

In this case, m1 = 18 M, m2 = 1.5 M, and v2 = 30 mL.

What we are looking for is v1, the amount of the stock HCl needed for dilution.

v1 = m2v2/m1 = 1.5 x 30/18 = 2.5 mL.

Thus, 2.5 mL of the stock HCl would be needed.

More on dilution can be found here: brainly.com/question/21323871

#SPJ1

6 0

2 years ago

2. A block of wood has a mass of 360 grams and a density of 60 g/cm3. What is the volume

horsena [70]

Answer:

6cm

Explanation:

3 0

3 years ago

Given the speed of light as 3.00 x 10° m/s, calculate the

Anarel [89]

Answer:

the answer is mabye 30 I didnt understand

6 0

2 years ago

compute the mass-specific enthalpy change associated with Nz that is undergoing a change in state from 400 k to 800 k

Kitty [74]

Answer:

The correct answer is "430 kJ/kg". A further explanation is given below.

Explanation:

The given values are:

T₁ = 400 k

T₂ = 800 k

The average temperature will be:

= $\frac{T_1+T_2}{2}$

= $\frac{400+800}{2}$

= $600 \ k$

From table,

At 600 k the $C p$ will be = 1.075

Now,

⇒ The specific enthalpy = $Cp(T_2-T_1)$

⇒ $\Delta h=1.075 (800-700)$

⇒ $=430 \ kJ/kg$

8 0

2 years ago