2 science questions I am a bit stuck on, help much appreciated thank you ^^ (cant attach files for some reason)
question - (b) Greenhouse gases cause global climate change.
Give two effects of global climate change.
1.

2.

(2)
question - (c) 4.1 kg of a plastic, used to make plastic bottles, has a carbon footprint of 6.0 kg of carbon dioxide.
Calculate the carbon footprint of one plastic bottle of mass 23.5 g

Which of the following statements is not true? • a. covalent compounds have low melting and boiling points. • ob. covalent bonds between atoms of a compound are relatively weak compared to bonds between molecules. • c. covalent bonds occur between nonmetals. • d. covalent compounds are often gases or liquids.

Predict the products butane (c4h10) + oxygen —>

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.