WebMar 22, 2024 · Part of Carbon = 3/25 Percentage of Carbon part in chalk = 3/25×100 = 12% (ii) Quantity of Carbon in chalk stick = 3 g Let the weight of chalk be x g. Then, 12% of x = 3 ⇒ 12/100 X x=3 ⇒ x = 3×100/12 = 25 g Hence, the weight of chalk stick is 25 g. lass 7 Maths Chapter 8 Exercise 8.3 WebNov 20, 2024 · Chalk is a form of calcium carbonate, and contains the elements calcium, carbon, and oxygen. ... which is composed of calcium, carbon, and oxygen. The chalk used for chalkboards is actually gypsum ...
NCERT Solutions for Class 7 Maths Chapter 8 Comparing Quantities
WebMar 31, 2024 · Question asked by Filo student. Chalk contains 10% calcium, 3% carbon and 12% oxygen. The amount of each of these in 1 kg of. 30 g,100 g,120 g. 100 g,30 g,120 g. 120 g,30 g,100 g. WebOct 20, 2011 · Chalk is a form of calcium carbonate, and contains the elements calcium, carbon, and oxygen. What element is found in chalk? There are many elements, some of which are magnesium silicate and ... property damage for auto insurance
Chalk contains calcium, carbon and oxygen in the ratio 10 : 3 : …
WebThe ratio of calcium, carbon and oxygen is 10:3:12. Parts of carbon = 3. Sum of all parts = 10 + 3 + 12 = 25. Percentage of carbon = (Parts of carbon / Sum of all parts) × 100 = 3 / … WebClick here👆to get an answer to your question ️ 7. (1) Chalk contains calcium, carbon and oxygen in the ratio 10:3:12. Find the percentage of carbon in chalk. (1) If in a stick of chalk, carbon is 3g, what is the … WebJun 5, 2024 · Percentage of carbon in chalk = 3%. Percentage of oxygen in chalk = 12%. Weight of chalk = 2 1/2 kg = 5/2 kg = 2.5 kg x 1000 g = 2500 gm. Amount of carbon in chalk = 3% of 2500 g = 3/100 x 2500 = 25 x 3 = 75 g. Amount of calcium in chalk = 10% of 2500 g = 10/100 x 2500 = 10 x 25 = 250 g. Hence, amount of carbon and calcium are … property damage exceeds insurance coverage