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gayaneshka [121]
4 years ago
9

What does the word "skepticism" mean in science?

Chemistry
1 answer:
Genrish500 [490]4 years ago
4 0
I know the answer it is...
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What is the mass of the 3.7 mol pbo2?
serious [3.7K]
239,2 g/mol x 3,7 mol = 885,04 g
5 0
3 years ago
Carbon tetrachloride, CCl4, was once used as a dry cleaning solvent, but is no longer used because it is carcinogenic. At 55.8°C
joja [24]
Use the Clausius-Clapeyron equation... 

<span>Let T1 be the normal boiling point, which will occur at standard pressure (P1), which is 101.3 kPa (aka 760 torr or 1.00 atm). You know the vapour pressure (P2) at a different temperature (T2). And you are given the enthalpy of vaporization. Therefore, we can use the Clausius-Clapeyron equation.

</span>ln(P_1/P_2) = \frac{-\delta H_{vap}}{R}  \times [\frac{1}{T_1} - \frac{1}{T_2}]<span>

</span><span>ln(101.3 kPa / 52.7 kPa) = (-29.82 kJ/mol / 8.314x10^{-3} kJ/molK) (1/T - 1/329 K) 
</span>
------ some algebra goes here ----- 

<span>T = 349.99K ...... or ...... 76.8C </span>

4 0
3 years ago
How did the gold foil experiment lead to the discovery of the nucleus?
makvit [3.9K]

Answer:

Rutherford established the nuclear theory of the atom with his gold-foil experiment. When he shot a beam of alpha particles at a sheet of gold foil, a few of the particles were deflected. He concluded that a tiny, dense nucleus was causing the deflections.

5 0
3 years ago
How much volume would 0.450 mol CO2 gas occupy?
umka21 [38]

Answer:

10.08 L.

Explanation:

  • If we assume that CO₂ gas behaves ideally at STP (standard T(0.0 °C) and P(1.0 atm)):

<em>It is known that 1.0 mole of ideal gas occupies 22.4 L at STP conditions.</em>

<em></em>

<u><em>Using cross multiplication:</em></u>

1.0 mole of CO₂ gas occupies → 22.4 L.

0.45 mole of CO₂ gas occupies → ??? L.

<em>∴ The volume occupied by 0.45 mole of CO₂ gas </em>= (0.45 mol)(22.4 L)/(1.0 mol) = <em>10.08 L.</em>

5 0
3 years ago
Decide which element probably forms a compound with oxygen that has a chemical formula most and least similar to the chemical fo
mafiozo [28]

Answer:

Most similar   -----  Lithium

Least similar   ----  Nitrogen

Explanation:

Cesium is an element on the periodic with the atomic number 133. It lies in group 1 (i.e., the alkali metals) and period 6 on the periodic table. The oxidation state of group 1 metals is +1. Cesium forms an oxide with oxygen as  Cs_2O.

The most similar compound to this chemical compound is Lithium because Lithium happens to be in the same group one metal with Cesium and forms the compound Li_2O with the oxygen

The least similar compound nitrogen due to fact that it is an oxide that is covalent in nature and lies between-group 3 -17  to form an NO_2 with oxygen.

8 0
3 years ago
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