Roughly how many heartbeats are there in a lifetime? Express your answer in scientific notation.
Roughly how many heartbeats are there in a lifetime? Express your answer in scientific notation.
Approximately how many heartbeats are there in a lifetime? Estimate any values you need for this calculation. O 4 x 107 ○ 2x10^11 5x10 13 ○ 3 × 10^9
QUESTION 6 Perform the operation and express your answer in scientific notation. 16,000 × 0.0405 0.0003 0.05 O 432.0x 105 O 1.08 x 105 O 108 x 103 4.32x 107
How many moles is 1.964 g of calcium oxalate monohydrate, Ca(C2O4)·H2O? Report your answer in scientific notation in this form: 1.234e56.
Part C How many aluminum atoms are in 3.78 g of aluminum? Express your answer in aluminum atoms using scientific notation. ΑΣΦ A1 atoms Submit Request Answer Part D What is the mass of 4.91 x 1021 platinum atoms? Express your answer in grams of platinum. Vo ΑΣΦ Submit Request Answer
Subtract 9.0 × 103 from 2.0 × 104 and express the answer in scientific notation.
1. Express the following numbers in correct scientific notation. 0.007230 -72800 308.70 2. How many significant figures are there in the following numbers? 650.00 102200 10. 45.034 2.60 x 1022 17.2010 3. Round off the following numbers to TWO significant figures. 34.459 0.07918227 700-2 6.854 x 10- 0.729
1. Express your answer in scientific notation. An x-ray photon of initial frequency 1.7 × 1019 Hz collides with a free electron at rest; the scattered photon moves off at 106°. What is the frequency of the scattered photon (in Hz)? 2. What is the smallest energy photon that can be absorbed by a hydrogen atom in its fifth excited state (in eV)?
How many yards are there in 2.5km? One yard is exactly
0.9144m. give answer in scientific notation
How many yards are there in 2.5 km ? One yard is exactly 0.9144m. Give answer in Scientific notation. 0.002286
How many moles is 0.276 g of calcium oxalate monohydrate, Ca(C2O4)·H2O? Report your answer in scientific notation in this form: 1.234e56.
With 2 significant figures and using scientific notation: a. How many square meters in an acre? b. How many square kilometers in a square mile? c. How many astronomical units in a parsec?