An empty flask weighed 50.10g and 50.40g when filled with hydrogen, calculate its mass in grams when filled with sulphur dioxide under the same condition (So2=64)​

Alow pressure system is formed when an air mass cools over a cool surface and sinks. true or false

What evidence does the writer give to support his argument about coral reefs? a) he speaks of the activities of coral polyps. b) he describes the composition of the great barrier reef. c) he emphasizes the ways in which coral reefs are fragile. d) he points out the ways that scientists do research on the reefs.

Hey, i was what is consisted in a sustainable city? like what unique designs they have, etc. for answering ; )