Cell theory was discovered from the scientist
Answer:
antimatter is a material composed of so called antiparticles called positron has the same mass but a positive change
Answer:
Coal is made from plants that were once alive! Since coal comes from plants, and plants get their energy from the sun, the energy in coal also came from the sun
For the answer to the question above, I can't help you directly because I don't have a calculator right now. But I'll show you how to solve this.
<span>use the freezing point depression formula for this one: delta T = i * m * K where K is a constant, m is the molality (mol solute/kg solvent), and i is the van'hoff factor the van hoff factor is the number of ions that your salt dissociates into. Since it's an ALKALI flouride salt, how many ions? k is just a constant, you get it from a table in your textbook somewhere So you have everything to solve for the molality of the solution, once you did that, multiplying it by the mass of water to find the mols of the salt. Take the mass of the salt and divide by this mols to figure out the molar mass, and then compare it with the periodic table to identify the salt.
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<u>Mole solute</u> x mass of Water = Mol solute<u>
</u>kg Solvent
then
Mass of solute x <u> 1 </u> = molar mass
mole of solute
Answer:
Explanation:
CuCO3(s) ====> Cu(ii)O(s) + CO2(g)
Nothing else needs to be done. The equation is balanced.
