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xeze [42]
3 years ago
11

Why is ice melting called an endothermic process and not an endothermic reaction?​

Chemistry
1 answer:
Mkey [24]3 years ago
6 0
A reaction is when something mixes together and possible makes a new substance
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What is the molar mass of magnesium
mina [271]

Hey there!

The molar mass of magnesium is 24.305 grams.

The molar mass of an element is the same as the atomic mass of an element, but measured in grams.

It's on the periodic table underneath the element symbol.

Hope this helps!

3 0
3 years ago
A sample substance has the chemical formula:
Agata [3.3K]

Answer:

1,6,8

Explanation:

Periodic Table- H=1.C=6,O=8

Hydrogen is H, Carbon is C, Oxygen is O

7 0
3 years ago
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The speed of a car should be going when trying to drift is around 30 mph how fast is this in m/s
Galina-37 [17]
1 miles = 1609.344 m
1 hour = 60 min x 60 sec = 3600 s

30 miles 1 hr 1609.344 m
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5 0
3 years ago
A student is examining a bacterium under the microscope. The E. coli bacterial cell has a mass of m = 1.80 fg (where a femtogram
egoroff_w [7]

Answer:

Δx ≥  1.22 *10^-10m

Explanation:

<u>Step 1:</u> Data given

The E. coli bacterial cell has a mass of 1.80 fg ( = 1.80 * 10^-15 grams = 1.80 * 10^-18 kg)

Velocity of v = 8.00 μm/s (= 8.00 * 10^-6 m/s)

Uncertainty in the velocity = 3.00 %

E. coli bacterial cells are around 1 μm = 10^−6 m in length

<u>Step 2:</u> Calculate uncertainty in velocity

Δv = 0.03 * 8*10^-6 m/s =2.4 * 10^-7 m/s

<u>Step 3:</u> Calculate the uncertainty of the position of the bacterium

According to Heisenberg uncertainty principle,

Δx *Δp ≥ h/4π

Δx *mΔv ≥ h/4π

with Δx = TO BE DETERMINED

with m = 1.8 *10^-18 kg

with Δv = 2.4*10^-7

with h = constant of planck = 6.626 *10^-34

Δx ≥  6.626*10^-34 / (4π*(1.8*10^-18)(2.4*10^-7))

Δx ≥  1.22 *10^-10m

6 0
3 years ago
Determine balanced chemical equations for the following chemical reactions
Lena [83]

Answer:

hey just where are the rections keep a pic

Explanation:

okay?.........................................

4 0
3 years ago
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