when silica is heated with Na²CO³ we get which on cooling gives a glassy mass known as because it is in water. option -->( carbon dioxide , glass, in soluble), ( sodium silicate, water glass, in soluble),( sodium silicate, water glass, soluble ), carbon dioxide, glass, soluble)

The yearly amounts of carbon emissions from cars in belgium are normally distributed with a mean of 13.9 gigagrams per year and a standard deviation of 5.8 gigagrams per year. find the probability that the amount of carbon emissions from cars in belgium for a randomly selected year are between 11.5 gigagrams and 14.0 gigagrams per year. a. 0.340 b. 0.660 c. 0.167 d. 0.397

An animal cell loses the ability to convert energy stored in food to energy that the cell can use. which of the cell's organelles has stopped working? a.the mitochondria b.the nucleus c.the vacuoles d.the endoplasmic reticulum

How is the shape of the poem “peer” connected to its meaning?