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2 years ago

Which wave has the longer wavelength? Wave 1 Wave 2

Chemistry

2 answers:

rodikova [14]2 years ago

6 0

Wave 1
Hope this helps!

dem82 [27]2 years ago

3 0

Answer:

Wave 1

Explanation:

mark me as brainlest

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If 175 g of phosphoric acid reacts with 150.0 g of sodium hydroxide, what is the limiting reactant? How many grams of sodium pho

Evgen [1.6K]

Answer:

NaOH is the limiting reactant.

204.9 g of sodium phosphate are formed.

51.94 g of excess reactant will remain.

Explanation:

The reaction that takes place is:

H₃PO₄ + 3NaOH → Na₃PO₄ + 3H₂O

First we convert the mass of both reactants to moles, using their respective molar masses:

H₃PO₄ ⇒ 175 g ÷ 98 g/mol = 1.78 mol

NaOH ⇒ 150 g ÷ 40 g/mol = 3.75 mol

1.78 moles of H₃PO₄ would react completely with (1.78 * 3) 5.34 moles of NaOH. There are not as many NaOH moles so NaOH is the limiting reactant.

We calculate the produced moles of Na₃PO₄ using the limiting reactant:

3.75 mol NaOH * $\frac{1molNa_3PO_4}{3molNaOH}$ = 1.25 mol Na₃PO₄

Then we convert moles into grams:

1.25 mol Na₃PO₄ * 163.94 g/mol = 204.9 g

We calculate how many H₃PO₄ moles would react with 3.75 NaOH moles:

3.75 mol NaOH * $\frac{1molH_3PO_4}{3molNaOH}$ = 1.25 mol H₃PO₄

We substract that amount from the original amount:

1.78 - 1.25 = 0.53 mol H₃PO₄

Finally we convert those remaining moles to grams:

0.53 mol H₃PO₄ * 98 g/mol = 51.94 g

3 0

3 years ago

A gas is confined in a 0.3m diameter cylinder by a piston, on which rests a weight. The mass of the piston is 85 kg. The local a

iris [78.8K]

Explanation:

Force applied on the gas will be as follows.

$F_{gas} = F_{atm} + (m + M) g$

As, F = pressure × area. Hence, calculate the forces as follows.

$F_{gas}$ = pressure × area

= $1.4 \times 10^{5} Pa \times \pi \times (\frac{0.3}{2})^{2}$

= $1.979 \times 10^{4}$ N

$F_{atm}$ = pressure × area

= $1.0133 \times 10^{5} \times \pi \times (\frac{0.3}{2})^{2}$

= $1.432 \times 10^{4}$ N

$F_{gas}$ - $F_{atm}$ = $5.47 \times 10^{3}$ N

Substituting the calculated values into the above formula as follows.

$F_{gas} = F_{atm} + (m + M) g$

$F_{gas} - F_{atm}$ = (m + M) g

$5.47 \times 10^{3}$ N = $(m + 85) \times 9.8$

$5.47 \times 10^{3}$ N = $9.8m + 833$

m = 472.76 kg

Thus, we can conclude that the mass is 472.76 kg.

5 0

4 years ago

Between carbon and silicon, which element has the strongest attraction between its nucleus and its valence electrons? Explain?

Ede4ka [16]

Answer:

Between carbon and silicon, silicon element has the strongest attraction between its nucleus and its valence electrons.

because silicon's nucleus is bigger than carbon.silicon loses electrons easily than carbon.

8 0

3 years ago

Calcium forms ions with a charge of +2. Iodine forms ions with a charge of -1. Which of the following would represent an ionic c

Stolb23 [73]

Well you know that you have to balance out the equation to 0. So if I is -1 and Ca is +2 you know that I had to equal to -2. So you can do that by having two of them. So Ca=+2 and I2=-2 so CaI2 would equal 0 meaning that would be the correct answer. Hope that I explained that correct :)

7 0

3 years ago

Read 2 more answers

What would happen if a neutron was added to Lithium (7)

Ainat [17]

Answer:

if you add a neutron to lithium-7 it becomes a compound nucleus of lithium-8

8 0

3 years ago