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2 years ago

What is a tornado and how does it form? ( Don't search the answer )

Chemistry

2 answers:

astra-53 [7]2 years ago

7 0

Answer: when hot air and cold air clash they spin creating a vaccum which causes a tornado

Explanation:

kodGreya [7K]2 years ago

7 0

Answer:

A tornado is a wind tunel (that's probaly spelled wrong). It basically happens when wind is spinning in a circle, and it keeps picking up. This is a reason why tornados don't survive in hilly places.

Explanation:

I think...

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What is the mass in grams of 2.0 moles of NO2

mote1985 [20]

Use your periodic table to get 1 mol. Look up the atomic masses. I'll round the numbers since every periodic table is different.

N = 14
O2 = 2 *16
Total = 30 grams / mol

Therefore 2 mols = twice as much = 60 grams.

4 0

3 years ago

How many atoms of Lead are in a 62.7 g sample of Lead(II) permanganate?

Alexandra [31]

Answer:

$\large \boxed {8.48 \times 10^{22}\text{ atoms}}$

Explanation:

1 mol of Pb(MnO₄)₂contains 1 mol of Pb atoms.

1. Moles of Pb

$\text{Moles of Pb} = \text{62.7 g Pb(MnO$_{4}$)}_{2} \times \dfrac{\text{1 mol Pb(MnO$_{4}$)}_{2}}{\text{445.07 g Pb(MnO$_{4}$)}_{2}}\\\\\times \dfrac{\text{1 mol Pb}}{\text{1 mol Pb(MnO$_{4}$)}_{2}} = \text{0.1409 mol Pb}$

2. Atoms of Pb

$\text{Atoms of Pb} = \text{0.1409 mol Pb } \times \dfrac{ 6.022 \times 10^{23}\text{ atoms Pb }}{\text{1 mol Pb }}\\\\= \large \boxed {\mathbf{8.48 \times 10^{22}}\textbf{ atoms Pb }}$

8 0

2 years ago

What is important to note regarding neutral atoms?

S_A_V [24]

Answer:

neutral atoms when an atom is charge less

Explanation:

8 0

2 years ago

If an object has a mass of 3500 mg what is the mass in kg? Show detailed work

dangina [55]

The answer is 0.0035

In order to figure out kg, you have to know that 1 milligram is equal to 1/100000 kilograms. You take the amount of mg's that you have, which is 3500, and divide it by 1000000 which will give you your answer.

3500/1000000= 0.0035 kg

7 0

3 years ago

Ethanol has a Kb of 1.22 °C/m and usually boils at 78.4 °C. How many mol of an nonionizing solute would need to be added to 48.8

Galina-37 [17]

Answer:

0.272 mol

Explanation:

∆Tb = m × Kb

∆Tb = 85.2°C - 78.4°C = 6.8°C

Kb = 1.22°C/m

mass of ethanol = 48.80 g = 48.80/1000 = 0.0488 kg

Let the moles of non-ionizing solute be y

m (molality) = y/0.0488

6.8 = y/0.0488 × 1.22

y = 6.8×0.0488/1.22 = 0.272 mol

6 0

2 years ago