Answer:
It occurs naturally in a variety of sources, such as stinging ants, nettles, pine needles, and sweat.
Explanation:
methanoic acid (formic acid, HCOOH) Colourless, corrosive, pungent, liquid carboxylic acid. It is used to produce insecticides and for dyeing, tanning, and electroplating. It occurs naturally in a variety of sources, such as stinging ants, nettles, pine needles, and sweat
Lawrencium has 10 recognized isotopes. Its most stable is 262Lr, with a half-life of about four hours.
Answer:
20.5 atm
Explanation:
First, let's calculated the volume of the air tank. For a sphere, the volume is
V = (4/3)xπr³, where r is the radius.
The diamenter given is 78 cm, so r = 78/2 = 39cm, then:
V = (4/3)xπx39³
V = 248,474.84 cm³
Knowing that 1 cm³ = 0.001 L, V = 248.5 L
The gas will reduce its volume, but the temperature will not change, so we can use the Boyle equation for isothermic transformation:
P1V1 = P2V2, supposing that in the initial state the gas is in 1 atm
1x5100 = P2x248.5
P2 = 5100/248.5
P2 = 20.5 atm (3 significant digits)
Answer:
Most igneous, metamorphic, and sedimentary rocks contain rubidium (Rb) and strontium (Sr) in detectable amounts. However, the concentrations of these elements are almost always less than 1 percent, and they are therefore rarely determined in routine chemical analyses. Neither rubidium nor strontium is a major constituent in the common rock-forming silicate minerals, although strontium does form a carbonate (strontianite) and a sulfate (celestite) which are found in some hydrothermal deposits and certain sedimentary rocks, particularly carbonates.
Explanation: