Which of the following is the main evidence of life in the early universe?

A) photosynthetic bacteria

B) remains in amber

C) dinosaur fossils

D) rock impressions

Which material gives the soil its high fertility?

True or False? Not all compounds will dissolve in water.

How many electrons in mole will discharge 2g of Copper 2 ions

The "air bags" that are currently installed in automobiles to prevent injuries in the event of a crash are equipped with sodium azide, NaN3, which decomposes when activated by an electronic igniter to produce nitrogen gas that fills the bag.

What does c and s = in 7c2s2?

Which of the following statements is true about both nuclear fusion and nuclear fission? They occur in the sun. Heavy atoms are split. Two light nuclei combine. Some mass changes into energy.

What does the name iron (II) in a compound indicate about the cation? A an 11 + charge B a 2 - charge C a 2 + charge

Examples of balanced decomposition reactions

A birthday balloon had a volume of 14.1 L when the gas inside was at a temperature of 13.9 °C. Assuming no gas escapes, what is its volume when the balloon warms up to 22.0 °C?

Which of the following is not an indication of a chemical change?