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Verizon [17]
3 years ago
15

Calculate the quantity 87.3 cm − 1.655 cm. _____cm

Chemistry
2 answers:
Inessa05 [86]3 years ago
7 0

Answer:

82•355

Explanation:

1•655--87•3=82•355

slava [35]3 years ago
4 0

Answer:

the answer is 85.645cm

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Determine the frequency of light with a wavelength of 4.257x10^-7cm
TEA [102]

Answer:

frequency of light is 70.47\times 10^{15} \ per\ second

Explanation:

Given

wavelength of light = 4.257\times 10^{-7}\ cm = 4.257\times 10^{-7} \times 10^{-2} \ m= 4.257\times 10^{-9}\ m

Speed of Light = 3\times 10^8 \ m/s

∴ Frequency of Light = \frac{\textrm{Speed of Light}}{\textrm{wavelength}}=\frac{3\times 10^8}{4.257\times 10^{-9}}= 70.47\times 10^{15} \ per\ second

7 0
3 years ago
Someone please answer this...
kupik [55]

Answer:

5446.8 J

Explanation:

From the question given above, the following data were obtained:

Mass (M) = 50 g

Initial temperature (T₁) = 70 °C

Final temperature (T₂) = 192.4 °C

Specific heat capacity (C) = 0.89 J/gºC

Heat (Q) required =?

Next, we shall determine the change in the temperature. This can be obtained as follow:

Initial temperature (T₁) = 70 °C

Final temperature (T₂) = 192.4 °C

Change in temperature (ΔT) =?

ΔT = T₂ – T₁

ΔT = 192.4 – 70

ΔT = 122.4 °C

Finally, we shall determine the heat required to heat up the block of aluminum as follow:

Mass (M) = 50 g

Specific heat capacity (C) = 0.89 J/gºC

Change in temperature (ΔT) = 122.4 °C

Heat (Q) required =?

Q = MCΔT

Q = 50 × 0.89 × 122.4

Q = 5446.8 J

Thus, the heat required to heat up the block of aluminum is 5446.8 J

5 0
2 years ago
The density of an object is calculated as Density = . If 100mL of water weighs 100g calculate the density?
iren2701 [21]
D = mass / volume

d = 100 g / 100 mL

d = 1.0 g/mL
3 0
3 years ago
2. How does an atom of aluminum become an ion?
DENIUS [597]

Answer:

it loses 3 electrons

Explanation:

Tell me if I’m right

7 0
2 years ago
How cold is it on Uranus
Sav [38]

Answer:

-371 degrees f

Explanation:

-371 degrees F.

speeds on Uranus range from 90 to 360 mph and the planet's average temperature is a frigid -353 degrees F. The coldest temperature found in Uranus' lower atmosphere so far is -371 degrees F., which rivals Neptune's frigid temperatures.

(hope this helps can i plz have brainlist :D hehe)

6 0
3 years ago
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