Answer:
+1
Explanation:
For the equation to be balanced, the total mass number and the total atomic number on both side of the equation but be equal.
This is illustrated:
For the mass number:
Left side: 22
Right side: 22 + 0 = 22
For the atomic number:
Left side: 11
Right side: 10 + x
11 = 10 + x
Collect like terms
x = 11 - 10
x = 1
See attachment for further explanation.
Answer: The inner planets have common types of rocky land forms such as mountains and volcanoes.
Explanation: Helpteaching can give you an answer key to the quiz your working on also i took the test and got it right :)
Absorbance measures the ability of the substance to absorb light at a specific wavelength.
Absorbance is also equal to the product of molar absorptivity, path length and molar concentration.
The mathematical expression is given as:
(1)
where, A = absorbance
= molar absorptivity
l = path length
c = molar concentration.
The above formula is said to Beer's Law.
Absorptivity of protein x = 
Path length = 1 cm
Molar concentration = 
Put the values in formula (1)

= 
Thus, absorbance at 280 nm = 
(4) 615 m
Explanation:
From the table we see that the speed of sound in air at 20 °C is 343 m/s. Knowing this we devise the following reasoning:
if the sound travel through the air 343 meters in 1 second
then the sound travel through the air X meters in 2.38 seconds
X = (2.38 × 343) / 1 = 816.35 meters
Learn more about:
speed of sound
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