100 90 80 NANO 70 60 CaCl (o°H 6 00 KNO3

The SI unit for energy is the joule (J), which is equal to the kineticenergy possessed by a 2.00-kg mass moving at 1.00 m/s. Convertthis velocity to mph (1 mi = 1.609 km).(a) 4.47 × 10–7 mph (b) 5.79 × 106 mph (c) 5.79 mph (d) 0.0373 mph (e) 2.24 mph

2A. The average density of Earth is 5.52 g/cm3. What is its density in (a) kg/m3; (b) Ib/ft³? 2B. There are 2.60 x 1015 short tons of oxygen in the atmosphere (1 short ton = 2000 Ib). How many metric tons of oxygen are present (1 metric ton = 1000 kg)?

A sample of volume 270 cm³ has a mass of 0.645 kg. (a) What is the density of the sample? (b) Is the material gaseous or condensed? g/cm3

the carat(ct) is a unit of mass used for measuring gemstones and pearls. it is believed that the word comes from Greek for carob seed, because carbo seeds were used to measured jewelry throughout history. in modern times it has been using jewerly measurment, which of the following set up will give the correct converstion for 1.00 troy ounce (t oz) of gold to carat (ct) 24 (g)=1 (dwt) 20(dwt)=1 troy ounce(t oz) 12 (t oz) = 1 troy pound (lb t) 1 (g) =0.0648 (g) 1 carat (ct) =0.200 (g) a) 1.00 t oz=1lb t=12 toz=20dwt=24g=1ct b) 1 toz=1dwt=24g=1gr=20dwt=1lbt=1lb t=1ct c)1.00 t oz=20dwt=24g=1/0.200 ct c)1.00 toz=24g=1gr=1ct

Note: In the calculations below. consider all distances to be measured between the centers of the spheres. From a study of the right triangles involved in a cube, as illustrated below, where (a) is the edge length. (f) is the face diagonal, and (b) is the body diagonal, the following is apparent: b b²=f²+ a² f² = a² + a² b²=3a2 In calculating the volumes, not that only one-eighth of each of the corner spheres is inside the cube which has as its corners the centers of the spheres. The volume of a sphere may be calculated from its radius by using the formula: V = 4/3лг³ 1

how much space would a 0.434g sample of a material occupy if it has a density of 1.23gcm-3

A CHM 126 student weighed an empty and clean 50-mL flask. The studernt then used a 10-ml volumetric pipet to transfer deionized water into the flask. Afterwards, she re-weighed the flask with the water. Using her resulting data and the density of water, she determined her measured volume of water in units of mL. Her data is listed below. What was the percent error in her measured milliliters of water? As always, be sure to report your answer with the proper number of significant figures while using proper rounding. mass of empty flask = 62.258 g mass of flask with water = 72.118 g density of water = 0.99821 g/mL Type your answer in the space below without the units.