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kompoz [17]
3 years ago
14

El sistema digestivo es un grupo de órganos que trabajan juntos para?

Chemistry
1 answer:
timama [110]3 years ago
3 0
El sistema digestivo es un grupo de órganos que trabajan juntos para convertir los alimentos en energía y nutrientes básicos para alimentar a todo el cuerpo.
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How many protons and electrons are contained in an<br> atom of element 44?
vitfil [10]

Answer:

44

Explanation:

protons and electrons have the same number:)

5 0
3 years ago
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Where does the 'Equiv' come from?
slega [8]

Explanation:

Equiv means equivalent ...

5 0
2 years ago
An atom or ion has 41 neutrons, 36 protons, and 36 electrons. Identify the element symbol, and determine the mass number
igor_vitrenko [27]

Answer:

Element symbol: Kr.

Mass number: 77.

Charge : 0.

Explanation:

Hello,

In this case, since such substance has the same amount of protons and electrons we can infer it is an atom whose number of neutrons is defined by considering its atomic mass or mass number and atomic number which is actually equal to the number of protons and electrons (36):

neutrons=atomic\ mass - atomic\ number

In such a way, solving for the atomic mass we obtain:

atomic\ mass=neutrons+ atomic\ number\\\\atomic\ mass=41+36=77

It means that the element is krypton (Kr) as it has 36 electrons and protons so its charge is 0.

Best regards.

5 0
3 years ago
In a beaker, 300 grams of water at 80°C cools down to 20°C. Assume all the heat from the water is absorbed by 100 cubic meters o
scZoUnD [109]

Answer:

mass of water, mw = 300g = 0.3kg

∆Tw = (80 - 20) °C

volume of air, va = 100m³

mass of air, ma = 100g = 0.1kg

∆Ta = ?

H = mc∆T

Hw = mwcw∆Tw

Hw = 0.3*4200*60

Hw = 75600J

Hw = 75.6 kJ

All the above heat energy got absorbed by air,

that is; Ha = 75600J

since it's given that the heat was absorbed by a specific amount of volume of air

then specific capacity of volume of air is

then,

ca = <u>Ha</u><u> </u> × <u>density</u><u> </u>

ma temp

then,

Ha = vaca∆Ta

where, ca = volumetric heat capacity of air = 0.012kJ/m³°C

75.6kJ = 100m³ × 0.012kJ/m³°C × ∆Ta

75.6 = 1.2/°C × ∆Ta

∆Ta = 63°C

63°C is the temperature change in air.

4 0
2 years ago
In Part 2 of the experiment, Joe first adds a buffer to his lemonade. After adding the baking soda, his lemonade is __.
Readme [11.4K]

b more likely to change pH


7 0
3 years ago
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