50 One beneficial use of radioisotopes is (1) detection of disease

(2) neutralization of an acid spill

(3) decreasing the dissolved O2 (g) level in seawater

(4) increasing the concentration of CO2 (g) in the atmosphere

Toluene is one of the components of crude oil which shows the balanced combustion reaction for toluene

The characteristics of two methods of heat transfer are listed below: Method A: No material medium is required and heat is transferred in all directions Method B: Material medium like gas or liquid is required and heat is transferred only in the

1. A 36.0-gram sample of formaldehyde (CH20) contains 14.4 grams of carbon. How many grams of carbon are in a 86.0-gram sample of this compound? OA (36.0/14.4) x 86.0 grams OB (14.4/36.0) x 86.0 grams ec 14.4 grams D (86.0/14.4) grams

What are index fossils and how are they used to determine the absolute age of sedi mentary rocks

What is a temperature scale used by scienctist?

Sulfur (S) has 16 protons and 16 neutrons. How many electron shells does an element of sulfur have?

Which one of the following statements about orbital energies is incorrect? A) The energy of a given orbital increases as the nuclear charge Z increases. B) In many-electron atoms the energy of an orbital depends on both n and l.

When solid lead (II) sulfide ore burns in oxygen gas, the products are solid lead (II) oxide and sulfur dioxide gas.? A. write the balanced equation B. how many grams of oxygen are required to react with 29.9 grams of lead II sulfide? C.

What are some differences between insect larvae and worms?

Suppose that 100 grams of water at 50.0°C is placed in contact with 200 grams of iron at 30.0°C. The final temperature is 46.5°C. The specific heats of water and iron respectively, are 4.18 and 0.45 joules per gram times Celsius.