Be sure to answer all parts. The area of a telescope lens is 6.557 × 1000mm2. (a) What is the area in square feet (ft2)? Enter your answer in scientific notation. × 10 ft2 (b) If it takes a technician 52.6 s to polish 1.61 × 102 mm2, how long does it take her to polish the entire lens?
Be sure to answer all parts. The area of a telescope lens is 6.557 × 1000mm2....
The area of a telescope lens is 6.633 ×103 mm2. (a) What is the area in square feet (ft2)? Enter your answer in scientific notation (b) If it takes a technician 56.7 s to polish 1.30 ×102 mm2, how long does it take her to polish the entire lens?
The area of a telescope lens is 7.195 x 10^3 mm^2 A) What is the area in square feet (ft^2)? Enter your answer in scientific notation B) If it takes a technician 47.8 seconds to polish 1.57 x 10^2 mm^2, how long does it take her to polish the entire lens?
Be sure to answer all parts. Asbestos is a fibrous silicate mineral with remarkably high tensile strength. But it is no longer used because airborne asbestos particles can cause lung cancer. Grunerite, a type of asbestos, has a tensile strength of 3.5 × 102 kg/mm2 (thus, a strand of grunerite with a 1−mm2 cross-sectional area can hold up to 3.5 × 102 kg). The tensile strengths of aluminum and Steel No. 5137 are 2.5 × 104 lb/in2 and 5.0 ×...
Be sure to answer all parts. What is the wavelength (in nm) of light having a frequency of 4.0 x 1015 Hz? What is the frequency (in Hz) of light having a wavelength of 8.29 x 102 nm? a) Wavelength of light x 10 nm (Enter your answer in scientific notation.) b) Frequency of light x 10 Hz (Enter your answer in scientific notation.)
Be sure to answer all parts. A volcanic eruption melts a large area of rock, and all gases are expelled. After cooling, 40Ar (atomic number 18) accumulates from the ongoing decay of 40K (atomic number 19) in the rock (t1/2 = 1.25 × 109 yr). When a piece of rock is analyzed, it is found to contain 1.23 mmol of 40K and 1.15 mmol of 40Ar. How long ago did the rock cool? Enter your answer in scientific notation.
Be sure to answer all parts. If 2.10 g of CuSO4 is dissolved in 8.75 × 102 mL of 0.310 M NH3, calculate the concentrations of the following species at equilibrium. Cu2+ × 10 M Enter your answer in scientific notation. NH3 M Cu(NH3)42+ M
Be sure to answer all parts. How many SO2 molecules are in 2.07 mol of SO2? How many sulfur atoms and oxygen atoms are there? a) × 10 SO2 molecules Enter your answer in scientific notation. b) × 10 S atoms Enter your answer in scientific notation. c) × 10 O atoms Enter your answer in scientific notation.
Be sure to answer all parts. Be sure to report your answer to the correct number of significant figures. Calculate AG and Kp for the following processes at 25°C: (a) H2(g) + Br2(1) 211B10 0 AG- k.I/mol x 10 (Enter your answer in scientific notation.) (b) , H2(g) + , Br2() HBr(g) 0 AG k.J/mol Кр Enter your answer in scientific notation.) × 10
Be sure to answer all parts. Calculate the molar solubility of AgI in the following. Ksp for AgI is 8.30 × 10−17. (a) pure water. Enter your answer in scientific notation. (b) 0.0600 M NaI Enter your answer in scientific notation.
Be sure to answer all parts. An FM station broadcasts classical music at 105.3 MHz (megahertz, or 10 m, nm, and A) of these radio waves. Hz). Find the wavelength (in (select) x 10 (Enter your answer in scientific notation.) nm x 10 (select) A (Enter your answer in scientific notation.) Be sure to answer all parts. Covalent bonds in a molecule absorb radiation in the IR region and vibrate at characteristic frequencies. (a) A molecular vibration absorbs radiation of...