The greenhouse effect is essential in order for the Earth to be able to sustain

life.

True

O False

Write the isotope needed, by identifying A, Z, and X, to balance the following nuclear fission reaction: 23592U+10n→14056Ba+AZX+3 10n

Why does iron take so long to heat up?

Vrite skeleton equations for the following word equations. I. hydrogen (g) + bromine (g) → hydrogen bromide (g)

To keep a sled accelerating downhill, the force of gravity must be greater than the normal force. True or False

In the target above, how would you classify the "hits"? (note: an accurate "hit" is a bull's-eye.)

4. Calculate the final concentration if water is added to 1.5 L of a 12 M NaOH solution to make 3.0 L of a diluted NaOH solution. Your answer

Why is it possible to safely drink a solution that contains a 50:50 mixture of equal concentrations of a strong acid and a strong base, either of which, if ingested separately, would be very caustic and damaging?

Explain why many compounds that contain one or more hydrogen atoms are not classified as arrhenius acids

pure substance x is a green powder. when heated, it gives off a gas and changes to a black powder. is substance x an element or a compound? give reasons

What amount (moles) is represented by each of these samples? a. 20.0 mg caffeine, c8h10n4o2 b. 2.72 1021 mo?