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Deepa
Subject: Chemistry
, asked on 19/1/18
2. Dalton used the weight of hydrogen to compare with the weight of
the other elements . For example , when he separated hydrogen and
oxygen from the compound water, he found that weight of oxygen was
seven times greater than the weight of hydrogen . As he believed that
one of hydrogen combined with one oxygen atom to make a molecule of
water , he thought that the atomic weight of hydrogen was one and
atomic weight of oxygen was seven.
a) What was the inaccurate observation that Dalton made ?
b) What inaccurate conclusion did Dalton make from his studies ?
Answer
1
Jayati
Subject: Chemistry
, asked on 8/1/18
Name any three undesirable changes. Explain why they are considered undesirable?
Answer
2
Deepa
Subject: Chemistry
, asked on 8/12/17
Dalton used evidence from the work of other scientists to help him
develop his theory read through each statement and identify the
scientist and the idea that he has combined?
Answer
1
Deepa
Subject: Chemistry
, asked on 4/11/17
What was the political consequence of dark ages?
Answer
2
Deepa
Subject: Chemistry
, asked on 3/10/17
a
Q. How do you think that the bicycle has been designed so that metal corrosion will not occur?
Answer
4
Deepa
Subject: Chemistry
, asked on 3/10/17
a
Q. Many tall buildings have a framework made of steel girders on which walls of brick and glass are built. If the steel was unprotected what would you expect to happen in time?
Explain your answer.
Answer
3
Deepa
Subject: Chemistry
, asked on 3/10/17
n
Q.4. On a winter's day a car is driven through slushy streets treated with salt (see page 100) and then parked in a warm garage.
a) How will the rate of rusting compare with a car that has not been driven in the slush but left parked outside?
Explain your answer.
b) What advice would you give to the driver of the first car to slow down rusting?
Answer
1
Deepa
Subject: Chemistry
, asked on 23/9/17
Imagine you are stranded in a very cold condition but you know that you will be rescued within 12 hours.how would you use two pairs of hand warmers to help keep us alive.
Answer
2
Nipa
Subject: Chemistry
, asked on 14/9/16
Argon is used in electric bulbs?
Answer
1
Swapnil Banerjee
Subject: Chemistry
, asked on 27/4/16
If there is no oxygen in space, then how do stars burn ?
Answer
2
Harsha Vardhan
Subject: Chemistry
, asked on 27/9/17
Name the most abundant metal in the earths crust?
Answer
1
Praharsh Singh
Subject: Chemistry
, asked on 3/7/17
When we boil an egg its water lick substance become jelly lick but if water is heated water evaporateboils ?
Answer
1
Baghu
Subject: Chemistry
, asked on 3/6/17
when manganese dioxide is added to hydrogen peroxide what do you obsereve?
Answer
1
Tejas Kaur
Subject: Chemistry
, asked on 2/4/17
Why do solids,liquids,gases differ in their physical state ?
Answer
4
Shreya Maheshwari
Subject: Chemistry
, asked on 29/3/17
My learning cotner
Question b
Part 2
Answer
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Next
What are you looking for?
the other elements . For example , when he separated hydrogen and
oxygen from the compound water, he found that weight of oxygen was
seven times greater than the weight of hydrogen . As he believed that
one of hydrogen combined with one oxygen atom to make a molecule of
water , he thought that the atomic weight of hydrogen was one and
atomic weight of oxygen was seven.
a) What was the inaccurate observation that Dalton made ?
b) What inaccurate conclusion did Dalton make from his studies ?
develop his theory read through each statement and identify the
scientist and the idea that he has combined?
Q. How do you think that the bicycle has been designed so that metal corrosion will not occur?
Q. Many tall buildings have a framework made of steel girders on which walls of brick and glass are built. If the steel was unprotected what would you expect to happen in time?
Explain your answer.
Q.4. On a winter's day a car is driven through slushy streets treated with salt (see page 100) and then parked in a warm garage.
a) How will the rate of rusting compare with a car that has not been driven in the slush but left parked outside?
Explain your answer.
b) What advice would you give to the driver of the first car to slow down rusting?
Question b
Part 2