26. All atoms area. positively charged, with the number of protons exceeding the number of electronsb, negatively charged, with
the number of electrons exceeding the number of protonswith the number of protons equaling the number of electronsd. neutral, with the number of protons equaling the number of electrons. which is equal to thenumber of neutrons27. The particles that are found in the nucleus of an atom arec. protons and neutronsa, neutrons and electronsd. protons and electronsb. electrons only28. As a consequence of the discovery of the nucleus by Rutherford, which model of the atom is thought to betrue?a. Protons. electrons, and neutrons are evenly distributed throughout the volume of the atom.b. The nucleus is made of protons, electrons, and neutrons.c. Electrons are distributed around the nucleus and occupy almost all the volume of the atom.d. The nucleus is made of electrons and protons.29. The nucleus of an atom isa. the central core and is composed of protons and neutronsb. positively charged and has more protons than neutronsc. negatively charged and has a high densityd. negatively charged and has a low density
1 answer:
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Answer:
The specific heat of the alloy
Explanation:
Mass of an alloy = 25 gm
Initial temperature = 100°c = 373 K
Mass of water = 90 gm
Initial temperature of water = 25.32 °c = 298.32 K
Final temperature = 27.18 °c = 300.18 K
From energy balance equation
Heat lost by alloy = Heat gain by water
[
-
] =
(
-
)
25 × × ( 373 - 300.18 ) = 90 × 4.2 (300.18 - 298.32)
This is the specific heat of the alloy.
Answer:
5 L
Explanation:
Given data
- Initial pressure (P₁): 1 atm
- Initial volume (V₁): 2.5 L
- Final pressure (P₂): 0.50 atm
- Final volume (V₂): ?
For a gas, there is an inverse relationship between the pressure and the volume. Mathematically, for an ideal gas that undergoes an isothermic change, this is expressed through Boyle's law.