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3 years ago

Wide shield-like mountains are formed from what type of lava?

Chemistry

2 answers:

KengaRu [80]3 years ago

7 0

Answer:

thick lava is the correct answer. i hope that this helps.

Explanation:

Kaylis [27]3 years ago

4 0

Thick liquid lava
It's right

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Why do covalent compounds have significantly lower melting/boiling points than ionic compounds?

melamori03 [73]

Ionic Bonds have a Lower melting and Covalent have higher.

8 0

4 years ago

PLEASE ANSWER ASAP!!! What is an example of a dilute solution that you can find at home?

sesenic [268]

An example of a dilute solution is tap water, which is mostly water (solvent), with a small amount of dissolved minerals and gasses (solutes). An example of a concentrated solution is 98 percent sulfuric acid (~18 M).

7 0

3 years ago

One of the reactions used to inflate automobile air bags involves sodium azide (NaN₃).

AleksandrR [38]

Answer:

161.54 g of N₂

Explanation:

The balanced equation for the reaction is given below:

2NaN₃ —> 2Na + 3N₂

Next, we shall determine the mass of NaN₃ that decomposed and the mass of N₂ produced from the balanced equation. This is illustrated below:

Molar mass of NaN₃ = 23 + (3×14)

= 23 + 42 = 65 g/mol

Mass of NaN₃ from the balanced equation = 2 × 65 = 130 g

Molar mass of N₂ = 2 × 14 = 28 g/mol

Mass of N₂ from the balanced equation = 3 × 28 = 84 g

SUMMARY:

From the balanced equation above,

130 g of NaN₃ decomposed to produce 84 g of N₂.

Finally, we shall determine the mass of N₂ produced by the decomposition of 250 g of NaN₃. This can be obtained as follow:

From the balanced equation above,

130 g of NaN₃ decomposed to produce 84 g of N₂.

Therefore, 250 g of NaN₃ will decompose to produce

= (250 × 84)/130 = 161.54 g of N₂

Thus, 161.54 g of N₂ were obtained from the reaction.

6 0

3 years ago

What is the molarity of potassium ions in a 0.122 M K2CrO4 solution

Viefleur [7K]

The molarity of potassium ions in a 0.122 M K2CrO4 is 0.244 M

<u><em>Explanation</em></u>

write dissociation reaction for K2CrO4

that K2CrO4 (aq)→ 2K^+ (aq) + CrO4^2- (aq)

K2CrO4 dissociate to give 2 ions of potassium ,therefore the molarity of potassium ion = 2 x 0.122 = 0.244 M

6 0

3 years ago

Read 2 more answers

A chemistry student weighs out 0.09666 g of phosphoric acid (H3PO4), a triprotic acid, into a 250.volumetric flask and dilutes t

Ber [7]

Answer: 14.62 ml

Explanation:

Molarity is defined as the number of moles of solute dissolved per liter of the solution.

$Molarity=\frac{n\times 1000}{V_s}$

where,

n= moles of solute

$V_s$ = volume of solution in ml = 250 ml

${\text {moles of solute}=\frac{\text {given mass}}{\text {molar mass}}=\frac{0.09666g}{98g/mol}=9.9\times 10^{-4}$

Now put all the given values in the formula of molarity, we get

$Molarity=\frac{9.9\times 10^{-4}\times 1000}{250ml}$

$Molarity=3.9\times 10^{-3}M$

To calculate the volume of base, we use the equation given by neutralization reaction:

$n_1M_1V_1=n_2M_2V_2$

where,

$n_1,M_1\text{ and }V_1$ are the n-factor, molarity and volume of acid which is $H_3PO_4$

$n_2,M_2\text{ and }V_2$ are the n-factor, molarity and volume of base which is NaOH.

We are given:

$n_1=3\\M_1=3.9\times 10^{-3}M\\V_1=250mL\\n_2=1\\M_2=0.2000M\\V_2=?$

Putting values in above equation, we get:

$3\times 3.9\times 10^{-3}\times 250=1\times 0.2000\times V_2\\\\V_2=14.62ml$

Thus the volume of NaOH solution the student will need to add to reach the final equivalence point is 14.62 ml

8 0

3 years ago