Nitrogen is a gas because it is an airlike fluid substance which expands freely to fill any space available, irrespective of it's quantity
The amount of energy absorbed by the 325g of water is 57,057J. Details about calorimetry can be found below.
<h3>How to calculate energy?</h3>
The energy absorbed by a mass of substance can be calculated using the following formula;
Q = mc∆T
Where;
- Q = quantity of heat absorbed
- m = mass of substance
- c = specific heat capacity
- ∆T = change in temperature
Q = 325g × 4.18 × (92 - 50)
Q = 57,057J
Therefore, the amount of energy absorbed by the 325g of water is 57,057J.
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Answer:
1,171 fluid ounces of herbicide is sufficient for 2050 square meter.
Explanation:
If 300 square feet of land is sprayed by the herbicide at the rate of 16 liquid ounce, So 1,171 fluid ounces of herbicide is enough to cover the area of 2050 square meters.
Calculation:
First convert 300 square feet into meter which is equal to 28 square meter.
16 ounces of herbicide = 28 square meter
x ounces of herbicide = 1050 square meter
by cross multiplication we get
28 x = 16 x 1050
x = 32800/ 28
x = 1171 ounces of herbicide.
Answer is: A. test and determine the pH values of unknown solutions.
Acid-base indicators are usually weak acids or bases and they are chemical detectors for hydrogen or hydronium cations (pH or pOH values).
Example for acid-base indicator is phenolphthalein (molecular formula C₂₀H₁₄O₄). Phenolphthalein is colorless in acidic solutions and pink in basic solutions.
Another example is methyl orange. It is red colour in acidic solutions and yellow colour in basic solutions.
