Opp that that person has to correct answer
Answer:
Hydro power
Advantage- Clean source
Safe
Disadvantage- Expensive
Environmental consequences
Coal
Advantage- Easy to find
Affordable
Disadvantage- Non renewable
Pollution
Explanation:
I helped you out with two of them
https://mgdic.files.wordpress.com/2016/12/unit-operations.pdf this
Answer:
B. 4 ham slices
Explanation:
A chemical reaction involves one or more substances known as reactants combining chemically to give one or more substances known as products.
Reactants in chemical reactions combine in definite mole or mass ratios to give products. Therefore, when one substance is present in excess of what is required to combine with another to form products, that substance is known as the excess reagent. The other substance which is present in a smaller amount and which when used up, the reaction stops is known as the limiting reagent.
From the illustration of the sandwiches in the question, the recipe for one sandwich represents the chemical equation of a reaction. The equation form is given below:
2 cheese slices + 1 ham slice + 2 bread slices ---> 1 sandwich
The ratio of the reactant is 2 : 1 : 2
From the available ingredients, 12 cheese slices, 10 ham slices, 12 bread slices.
12 cheese slices will require 6 ham slices and 12 bread slices to produce 6 sandwiches.
However, since there are 10 ham slices, 4 ham slices will be left over unused. This is the excess or leftover reactant.
<h3>Answer;</h3>
Substance i > Substance ii > Substance iii
<h3>Explanation:</h3><h3><em><u>Substance i</u></em><em> :</em></h3>
Data Given;
Density = ?
Mass = 12 g
Volume = 10 mL
Formula Used;
Density = Mass ÷ Volume
Putting Values,
Density = 12 g ÷ 10 mL
Density = 1.2 g.mL⁻¹
<h3><em><u>Substance ii</u></em><em> :</em></h3>
Data Given;
Density = ?
Mass = 10 Kg = 10000 g
Volume = 10 L = 10000 mL
Formula Used;
Density = Mass ÷ Volume
Putting Values,
Density = 10000 g ÷ 10000 mL
Density = 1 g.mL⁻¹
<h3><em><u>Substance iii</u></em><em> :</em></h3>
Data Given;
Density = ?
Mass = 10 mg = 0.01 g
Volume = 12.0 μl = 0.012 mL
Formula Used;
Density = Mass ÷ Volume
Putting Values,
Density = 0.01 g ÷ 0.012 mL
Density = 0.833 g.mL⁻¹
