So, as I understand it, we're talking about faulty information, one that is limiting people's access to certain services. An example of such information is the denial of an interpreter service for the Deaf. If someone is spreading the information that such a service is not available, even if is, then when someone challenges this information, they should be supported.
Answer:
Approximately 75%.
Explanation:
Look up the relative atomic mass of Ca on a modern periodic table:
There are one mole of Ca atoms in each mole of CaCO₃ formula unit.
- The mass of one mole of CaCO₃ is the same as the molar mass of this compound:
. - The mass of one mole of Ca atoms is (numerically) the same as the relative atomic mass of this element:
.
Calculate the mass ratio of Ca in a pure sample of CaCO₃:
.
Let the mass of the sample be 100 g. This sample of CaCO₃ contains 30% Ca by mass. In that 100 grams of this sample, there would be 
of Ca atoms. Assuming that the impurity does not contain any Ca. In other words, all these Ca atoms belong to CaCO₃. Apply the ratio 
:
.
In other words, by these assumptions, 100 grams of this sample would contain 75 grams of CaCO₃. The percentage mass of CaCO₃ in this sample would thus be equal to:
.
Answer:
Cotton and Jute
Explanation:
Cotton and jute are the two most important fibre crops of India. Cotton provides the basic raw material to cotton textile industry. Cotton is a kharif crop which requires 6 to 8 months to mature. The main cotton producing states are Gujarat, Maharashtra and Andhra Pradesh. Next to cotton, jute is the second important fibre crop of India. India is one of the principle producers of jute in the world. The major jute producing states of India are West Bengal, Assam, Bihar, Odisha, Andhra Pradesh and Meghalaya.
Answer:Classify each of the following chemical reactions.
S + O2 → SO2
CaCl2 + 2AgNO3 → Ca(NO3)2 + 2AgCl
Zn + CuSO4 → Cu + ZnSO4
2Na2O → 4Na + O
Explanation:
synthesis and combustion
double replacement
single replacement
decomposition only
