A gas has a volume of 420 L at a temperature of -42.0 degrees celsius. What volume will the gas occupy at 18.0 degrees celsius? Show your work
Answers
Formula
V/T = V1/T1
Givens
V = 430 L
T = - 42 °C = - 42 + 273 = 231°K
V1 = ??
T1 = 18°C + 273 = 291°K
The pressure is a constant.
Solution
420/231 = V1/291 Multiply by 291
420*291 / 231 = V1
V1 = 122220 / 231
V1 = 521.1 L
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The major argument of opponents of the 1919Treaty of Versailles was that the treaty wouldrequire the United States to(1) become involved in future internationalconflicts(2) pay for war damages(3) adopt a policy of military alliances(4) keep troops permanently in Europe
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The mass of 3.0 x 10^23 atoms of neon would be 10.09 g
According to Avogadro;
1 mole of neon would have 6.022 x 10^23 atoms
3.0 x 10^23 atoms of neon would have:
3.0 x 10^23/6.022 x 10^23
= 0.5 moles
mass of 0.5 moles neon = mole x molar mass
= 0.5 x 20.18
= 10.09 g
More on Avogadro number can be found here: brainly.com/question/1445383?referrer=searchResults
Answer: The mass of neon for the given number of atoms will be 9.8 g.
Explanation:
We are given:
Number of neon atoms =
According to the mole concept:
number of atoms. are occupied in 1 mole of a substance.
So, will be occupied in =
To calculate the number of moles, we use the equation:
Moles of Neon = 0.49 moles
Molar mass of neon = 20 g/mol
Putting values in above equation, we get:
Hence, the mass of neon for the given number of atoms will be 0.49g.
Answers
Answer:
Cl is more likely to than Na
Explanation:
The question asks for the element more take up an electron from the other
The ability of an atom to take take or give electrons in a chemical reaction, depends on its electron affinity and ionization energy, respectively
Chlorine, Cl, has the highest electron affinity in the periodic table which makes it attract electrons more towards itself
Sodium, Na, has a low ionization energy (about 2/5 of that of chlorine) than chlorine, Cl, making sodium more readily able to give its valence electron in a reaction
Therefore, Cl is more likely to take up an outer electron from Na.
Answers
You have to convert moles of O2 into moles of H2O so it's the number of moles you start with (1.75 O2) × the number of moles from the element you want (6 H20), then ÷ by the number of moles that the element that you already have (9 O2).
Answers
A lever with a mechanical advantage greater than 1 is used to lift a larger load.
What is lever ?
A beam or stiff rod is pivoted at a fixed, or fulcrum, to form a simple machine known as a lever. A stiff body that can rotate about a point on itself is called a lever. The three types of levers are categorised according to where the fulcrum, weight, and effort are located.
Mechanical advantage is the relationship between a machine's capacity to lift a load and the effort required to operate it. A machine is said to be a force multiplier if its mechanical advantage is larger than 1.
The effort arm and load arm of the lever are the same length when the mechanical advantage is equal to 1. Levers are employed to obtain an advantage when the mechanical advantage is less than 1.
Thus, A lever with a mechanical advantage greater than 1 is used to lift a larger load.
To learn more about the lever, follow the link;
#SPJ2
Answer:
to increase force
Explanation:
Answers
2H2 + O2 --> 2H2O
Next, the moles of the reactants must be used in order to apply their stoichiometric relationships. Note that 1 mole of oxygen needs 2 moles of hydrogen for the reaction proceed. Since there is only 1 mole of H2, only 0.5 moles of oxygen are consumed.
moles H2 = 2 g/ 2g/mol = 1 mole H2
moles O2 = 32 g/ 32g/mol = 1 mole O2
2H2 + O2 --> 2H2O
i 1 1 0
c 1 0.5 1
e 0 0.5 1
Assuming the reaction will proceed, there will be an excess of 0.5 mol O2 and a product of 1 mol H2O. This gives 18 grams of water.
(2) more effective particle collisions occur
(3) the required activation energy increases
(4) the concentration of the reactants increases
Answers
Justification:
Always keep in mind that the temperature is a measure of the average kinetic energy of the particles.
The higher the temperarute the hiigher the kinetic energy.
Also, remeber that the kinetic energy is the energy of motion: the higher the kinetic energy the hgher the speed of the particles and the more energetic the collisions.
Therefore, those more energetic collisions will increase the number of collisions that overcome the activiation energy leading to higher rate of conversion (reaction), whic is what a more effective particle collisions occur mean.