Answer:
The answer would be 1.5 kJ.
Explanation:
When you use the equation q = m x c x ∆T you will be able to find the energy gained or lost. The data for the water in this case is just there to distract you so ignore it. :D
Answer:
The interaction between sodium ion and the partial negative charge on the oxygen is stronger.
Explanation:
The predominant interaction that exists between sodium ion and the partial negative charge on the oxygen is ion-dipole interaction.
The predominant interaction that exists between two ethanol molecules is hydrogen bonding interaction.
The order of strength of the intermolecular interactions in decreasing order:
Ionic bond > ion-dipole interaction > hydrogen bonding > dipole-dipole interaction > ion-induced dipole interaction > induced dipole- dipole interaction > london force
So, ion-dipole interaction is stronger than hydrogen bonding.
Hence, the interaction between sodium ion and the partial negative charge on the oxygen is stronger.
Answer:
One of the most common methods used today to determine the composition of stars is <u>spectroscopy</u>.
Explanation:
Spectroscopy is the study of the interaction between matter and electromagnetic radiation as a function of the wavelength or frequency of the radiation.
<span>They can be separated by physical processes.
This problem requires you to simply memorize the definition of a mixture. So let's take a look at the choices and see why one is correct while the other three are wrong.
1. They are chemically bonded together - The definition of a mixture is where "two or more pure substances are combined where each substance retains its individual chemical property." This option isn't correct.
2. They can be classified as pure substances - This option doesn't work either since a mixture has two or more pure substances.
3. They have fixed ratios between their components - Imagine a mixture of salt and flour. You can have a little salt in the mixture or a lot of salt in the mixture. There isn't a fixed ratio, so this is also a bad choice.
4. They can be separated by physical processes - Since the other three options are all obviously false, this is the only possible option. Mind, the separation may not be easy (take a look at the salt and flour mixture used as a demonstration above), but it should be possible.</span>
Answer:
Electrons have a negative charge
hope this was helpful (plz vote brainliest, I would appreciate it!) :)