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Likurg_2 [28]
3 years ago
12

What does energy mean?

Chemistry
2 answers:
Fofino [41]3 years ago
7 0

Answer:

strength and vitality required for sustained physical or mental activity

Explanation:

Lubov Fominskaja [6]3 years ago
3 0

Answer:

energy is the quantitative property that must be transferred to an object in order to perform work on, or to heat, the object.

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What is chemical formula and equation ?
Daniel [21]

The answer to your question is,

Chemical formula is "a mathematical relationship or rule expressed in symbols". For example, H2 + O = H2O. < Water.

The equation H2 + O = H2O is two elements combining together. H, hydrogen. O, Oxygen. They form together to make a new compound of elements. Water. :))

-Mabel <3

8 0
3 years ago
A 5.00-l tank contains helium gas at 1.50 atm. what is the pressure of the gas in torr if volume is doubled
vazorg [7]
<span>570 torr. The ideal gas law is PV = nRT where P = pressure V = volume n = number of moles of gas particles R = Ideal gas constant T = absolute temperature Since the value n, R, and T remain constant for this problem, that indicates that if the volume is doubled, the pressure will be halved. So the new pressure will be 1.50 atm / 2 = 0.750 atm. Now we just need to convert that from atm to torr. 1 atm is equal to 760 torr, so 0.750 atm * 760 torr/atm = 570 torr.</span>
5 0
3 years ago
What is the temperature change that 725 g of aluminum will undergo when 2.35 x 104
Rashid [163]

Answer:

36°C

Explanation:

Given parameters:

Mass of aluminum = 725g

Quantity of heat  = 2.35 x 10⁴J

Unknown:

Temperature change  = ?

Solution:

To solve this problem, we simply use the expression below:

  The quantity of energy is given as:

          Q  = m C Δt

Q is the quantity of energy

m is the mass

C is the specific heat capacity of aluminum  = 0.9J/g°C

Δt is the change in temperature

  The unknown is Δt;

             Δt  = \frac{Q}{mc}    = \frac{2.35 x 10^{4} }{725 x 0.9}    = 36°C

5 0
2 years ago
How does a mixture of benzoic acid and benzaldehyde can be isolated separately by extractions? ​
Vilka [71]

Answer:

Dissolve benxioc acid and benzaldehyde in organic solvent. The two compounds are not miscible.with water. Put the two in separating funnel. Then use aqueous sodium bicarbonate to extract. Benzioc acid will be in aqueous layer as benzioate ion. Benzaldehyde remain insoluble and can be isolated.

Explanation:

Extractions are techniques use to separate desired compounds when mixed together. The mixture is brought in contact with solvent in which the sites substance is soluble and other is insoluble. Extractions use imissicible stages to separate substance from another.

6 0
3 years ago
At STP, the temperature is __ degrees Celcius and __ K. Question 2 options:
aliina [53]
At STP the standard temperature is 273.15 K.

At STP the standard temperature is 0*C
7 0
3 years ago
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