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3 years ago

Which type of wave does not require a medium to travel through?

Chemistry

1 answer:

nlexa [21]3 years ago

8 0

Hello,

I'm not very sure but I think the correct answer is D) Water Wave

I really hope this helps!!!! Happy Holidays!!!! (:

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Though alchemists were often superstitious, they left a rich legacy for modern chemists. What was their main contribution?

topjm [15]

though alchemists were often superstitious, they left a rich legacy of modern chemists. what was their main contribution-

Explanation:

they were the first to preform experiments.

5 0

3 years ago

A gas has a volume of 62.65L at O degrees Celsius and 1 atm. At what temperature in Celsius would the volume of the gas be 78.31

Anastaziya [24]

Answer:

The volume of the gas will be 78.31 L at 1.7 °C.

Explanation:

We can find the temperature of the gas by the ideal gas law equation:

$PV = nRT$

Where:

n: is the number of moles

V: is the volume

T: is the temperature

R: is the gas constant = 0.082 L*atm/(K*mol)

From the initial we can find the number of moles:

$n = \frac{P_{1}V_{1}}{RT_{1}} = \frac{1 atm*62.65 L}{(0.082 L*atm/K*mol)*(0 + 273)K} = 2.80 moles$

Now, we can find the temperature with the final conditions:

$T_{2} = \frac{P_{2}V_{2}}{nR} = \frac{612.0 mmHg*\frac{1 atm}{760 mmHg}*78.31 L}{2.80 moles*0.082 L*atm/(K*mol)} = 274.7 K$

The temperature in Celsius is:

$T_{2} = 274.7 - 273 = 1.7 ^{\circ} C$

Therefore, the volume of the gas will be 78.31 L at 1.7 °C.

I hope it helps you!

8 0

3 years ago

Combination (Synthesis) Reactions<br> pls help!

Ratling [72]

Answer: 1. CaO + H2O => Ca(OH)2

2. P4 + 5O2 => 2P2O5

3. 2 Ca + O2 => 2 CaO

4. 8 Cu + S8 => 8 CuS

5. CaO + H2O => Ca(OH)2

6. S8 + 8 O2 => 8 SO2

7. 3 H2 + N2 => 2 NH3

8. H2 + Cl2 =>2 HCl

9. 16 Ag + S8 => 8 Ag2S

10. Cr + O2 => 2Cr2O3

11. 2Al + 3Br2 => 2AlBr3

12. 2Na + I2 => 2NaI

13. 2H2 + O2 =>2 H2O

14. 4 Al + 3O2 => 2 Al2O3

Explanation:

4 0

3 years ago

Given the balanced equation representing a reaction:

Vilka [71]

(2) a base because they accept H+ ions. NH3 is the conjugate base of NH4+.

5 0

3 years ago

Determine the missing species:

Galina-37 [17]

Answer: 4. $^{0}_{-1}\textrm{e}$ and $^{0}_{1}\textrm{e}$

Explanation:

a) The given reaction is $^{41}_{20}\textrm{Ca}+^{x}_{y}\textrm{X}\rightarrow ^{41}_{19}\textrm {K}$

As the mass on both reactant and product side must be equal:

$41+x=41$

$x=0$

As the atomic number on both reactant and product side must be equal:

$20+y=19$

$y=-1$

$^{41}_{20}\textrm{Ca}+^{0}_{-1}\textrm{e}\rightarrow ^{41}_{19}\textrm {K}$

b) $^{15}_{8}\textrm{O}\rightarrow ^{15}_{7}\textrm{N}+^{x}_{y}\textrm{X}$

Total mass on reactant side = total mass on product side

15 =15 + x

x = 0

Total atomic number on reactant side = total atomic number on product side

8 = 7 + y

y = 1

$^{15}_{8}\textrm{O}\rightarrow ^{15}_{7}\textrm{N}+^{0}_{1}\textrm{e}$

5 0

2 years ago