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AfilCa [17]
3 years ago
5

A night when the temperature is 22°C?​

Chemistry
1 answer:
Ede4ka [16]3 years ago
4 0

huh that's suspicious that's weird

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The masses of four objects are given in this table. If all of the objects have the same acceleration, which will require the gre
worty [1.4K]

Answer:

Object 4 in the example

Explanation:

For simplicity and a clearer view of this problem, let's assume that four masses from 1 to 4 have the the masses 2 kg, 4 kg, 6 kg, 8 kg respectively.

According to the second Newton's law, we know that force is directly proportional to both mass and acceleration. The equation representing this is F = ma.

Notice that all of them have the same acceleration. This means, the greater the mass, the greater the force for a fixed acceleration. Simply speaking, the forces for each of the objects would be 2a, 4a, 6a and 8a respectively.

Since we're interested in the magnitude of the force and not direction, we neglect whether acceleration is positive or negative. This means that object 4 will require the greatest force to move, as it has the greatest mass.

3 0
3 years ago
Cortisone consists of molecules, each of which contains 21 atoms of carbon (plus other atoms). the mass percentage of carbon in
GalinKa [24]

Now to solve this problem, we are given the number of atoms therefore we must first convert this into number of moles. We can do this by using the Avogadro’s number. Calculating for number of moles of Carbon:

number of moles Carbon = 21 atoms of carbon (1 mole / 6.022 x 10^23 atoms C)

number of moles Carbon = 3.49 x 10^-23 mol C

 

Converting this to mass by multiplying the molar mass of C:

mass Carbon = 3.49 x 10^-23 mol C (12 g / mol)

mass Carbon = 4.18 x 10^-22 g

 

Therefore the mass of one molecule of Cortisone is:

mass of 1 molecule Cortisone = 4.18 x 10^-22 g / 0.6998

mass of 1 molecule Cortisone = 5.98 x 10^-22 g per molecule

 

Converting this to mass per 1 mol of Cortisone, by using again the Avogadro’s number:

mass of 1 mol Cortisone = (5.98 x 10^-22 g / molecule) (<span>6.022 x 10^23  molecules / mol)</span>

mass of 1 mol Cortisone = 360.10 g / mol = molar mass of cortisone

 

Answer:

360.10 g / mol

4 0
3 years ago
Consider the same cycle with non-isentropic turbine and pump. (e) Plot the variation of net power output, rate of heat transfer
ella [17]

The 60% is the total of the humid y

4 0
4 years ago
How many grams of H2 will be produced from 12 grams of Mg according to the following equation?
LUCKY_DIMON [66]

Answer:

0.98 g of H₂

Explanation:

the balanced equation for the reaction is

Mg + 2HCl ---> MgCl₂ + H₂

molar ratio of Mg to H₂ is 1:1

number of Mg moles reacted = 12 g/ 24.3 g/mol = 0.49 mol

according to molar ratio

when 1 mol of Mg reacts 1 mol of H₂ is formed

therefore when 0.49 mol of Mg reacts - 0.49 mol of H₂ forms

therefore mass of H₂ formed = 0.49 mol x 2 g/mol = 0.98 g

mass of H₂ formed is 0.98 g

7 0
3 years ago
How many moles of sodium hydroxide are in 1.5 liters of a 8 M solution?
cestrela7 [59]

Answer:

chill

Explanation:

4 0
3 years ago
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