Which fraction of an original 20.00-gram sample of nitrogen-16 remains unchanged after 35.65 seconds?

A volume of 24.72±0.06 mL of HNO3 solution was required for complete reaction with 0.8359±0.0007 g of Na2CO3, (FM 105.988±0.001 g/mol). Find the molarity of the HNO3 solution and its absolute uncertainty.

If element b has 4 prtons how many would an atom of element c have

The smallest unit that retains the properties of an element is aan) atom O molecule proton O compound neutron O electron

How many moles of water, H2O, contain 2.0*1022 molecules of water? (See the hints for assistance in interpreting scientific notation.) Express the quantity in moles to two significant figures.

tsMatch the characteristics of nuclear processes with the correct process. It combines small nuclei to make larger ones A. Fission B. Fusion 25-7 0.13 ptsMatch the characteristics of nuclear processes with the correct process. It occurs on the sun A.

Was the relationship among temperature, heat, and thermal energy?

What will most likely happen when a warmer air mass exists above a polar ice sheet? The temperature of the ice sheet will be lowered. Heat will be transferred from the air mass to the ice. The air mass will exert high pressure and rise upwards.

A 2.00 L sample of gas at 35 C is to be heated at constant pressure until it reaches a volume of 5.25 L. To what Kelvin temperature must this sample be heated?

Of the following reactions, which one produces oxygen gas? Fermentation Anaerobic respiration Aerobic respiration Photosynthesis

Describe the electrodes in this iron-copper galvanic cell.