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2 years ago

Is salt an element, a compound, a homogenous mixture, or heterogeneous mixture?

Chemistry

1 answer:

sp2606 [1]2 years ago

4 0

Salt is a compound.
Most salts are ionic compounds, meaning that they are made up of ions rather than molecules.

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Write the word and formula equations representing the chemical reaction that occurred between the. barium chloride solution , Ba

eduard

Word Equation: Barium chloride solution reacts with sodium sulfate solution to produce sodium chloride and barium sulfate.

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3 years ago

An experiment produced 0.10 g CO2 with a volume of 0.056 L at STP. If the accepted density of CO2 at STP is 1.96 g/L, what is th

Mandarinka [93]

The experimental density of CO2 at STP is 0.10/0.056=1.78 g/L. The percent error equals to (1.96-1.78)/1.96*100%=9.18%. So the answer is 9.18%.

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3 years ago

The half-life of a first-order reaction is 13 min. If the initial concentration of reactant is 0.085 M, how long would it take u

olasank [31]

Answer: It will take 8.2 minutes until the concentration decreases to 0.055 M

Explanation:

The time after which 99.9% reactions gets completed is 40 minutes

Explanation:

Expression for rate law for first order kinetics is given by:

$t=\frac{2.303}{k}\log\frac{a}{a-x}$

where,

k = rate constant

t = age of sample

a = let initial amount of the reactant

a - x = amount left after decay process

a) for completion of half life:

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

$t_{\frac{1}{2}}=\frac{0.693}{k}$

$k=\frac{0.693}{13min}=0.053min^{-1}$

b) Time taken for 0.085 M to decrease to 0.055 M

$t=\frac{2.303}{0.053}\log\frac{0.085}{0.055}$

$t=8.2min$

Thus it will take 8.2 minutes until the concentration decreases to 0.055 M

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3 years ago

PLS HELP NUMBER 14 I WILL REWARD BRAINLIEST IF ITS RIGHT BUT EXPLAIN PLZ :)

Ksivusya [100]

<h2>Hey There!</h2><h2>_____________________________________</h2><h2>Answer:</h2>

$\huge\boxed{\text{London / Van de Waals}}$

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London Dispersion force or Van de waals force is a temporary attractive force which are the weakest and occur between nonpolar noble gases and same charges. This force is weaker because they have more electrons that are farther from the nucleus and are able to move around easier.

<h2>_____________________________________</h2><h2> $\huge\textbf{Dipole-Dipole}$ </h2>

Dipole force is present between the polar molecules. Polar molecules are those molecules which have slightly negative and slightly positive charge. Dipole-dipole forces are attractive forces between the positive end of one polar molecule and the negative end of another polar molecule.

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It is a special type of dipole force present between polar molecules, it is formed between Hydrogen atom which forms positive ion, and the other negative ion. It results from the attractive force between a hydrogen atom covalently bonded to a very electronegative atom such as a N, O, or F atom. The hydrogen bond is one of the strongest intermolecular attractions, but weaker than a covalent or an ionic bond.

<h2>_____________________________________</h2><h2>Best Regards,</h2><h2>'Borz'</h2><h2 />

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3 years ago

A 6.0 L container of gas is 2.5atm. What would be the pressure if the volume is 12.0L

Scorpion4ik [409]

This works because it demonstrates that as volume increases, pressure decreases (inverse relationship)

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2 years ago