If an elements atomic mass is 70 and it has 39 neutrons how many protons does it have?

Which of the following is an isotope that can undergo fission? A) Carbon-12 B) calcium-43 C) uranium-235 D) zirconium-95

The bottom of a box has a surface area of 2.50 m2. The mass of the box is 51.5 kg. Acceleration due to gravity at sea level is 9.80 m/s2. What is the pressure exerted by the box where it rests? 20.2 Pa 131 Pa 4.76 Pa 202 Pa

What is the mass of 4.23*10^23 atoms of iron

Which type of bonding involves the complete transfer of a valence electron from a less electronegative atom to a more electronegative one?

Give 4 Economics activities associated with water

How is the ocean important to human survival? restate the question

A sample of pure lithium contains 7.99% lithium by mass. What is the % lithium by mass in a sample of pure lithium nitrate that has twice the mass of the first sample?

What ecosystem is being described in the passage?

In the enzyme reaction above, catechol is the substrate, oxygen is a reactant, catechol oxidase is the enzyme, benzoquinone is the product, and water (H2O) is a by-product. Which of the following will decrease the rate of this reaction? a.

How do acids and bases affect the quality of freshwater sources?