23 x 10 = 230
Something = 23/10 = 2.3
2.3 x 10 = 23
8.45 x 10^23 = 845,000,000,000,000,000,000,000
There are (6.023 \times 10^{23}) atoms in 1 mole of any substance (Avogadro's number). Therefore, there are (1.004 \times 6.023 \times 10^{23} \approx 6.05 \times 10^{23}) atoms in 1.004 moles of bismuth.
To multiply the numbers in scientific notation, you multiply the coefficients (1.6 and 8.01) and add the exponents (12 and 23). So, (1.6 \times 8.01 = 12.816) and (10^{12} \times 10^{23} = 10^{35}). Thus, the result is (12.816 \times 10^{35}), which can be expressed in proper scientific notation as (1.2816 \times 10^{36}).
23 000. This is standard form and should be written as: 23 x 10^2. (The ^ denotes an exponent.)
100,000,000,000,000,000,000,000
Three out of 10 students speak Chinese.
There are (6.022 \times 10^{23}) atoms in one mole of carbon. Therefore, in (1.0 \times 10^{-4}) moles of carbon, there would be (6.022 \times 10^{23} \times 1.0 \times 10^{-4} = 6.022 \times 10^{19}) carbon atoms.
To find the number of molecules in 0.25 mole of P4, you can use Avogadro's number, which is approximately (6.022 \times 10^{23}) molecules per mole. Therefore, the calculation is (0.25 , \text{mole} \times 6.022 \times 10^{23} , \text{molecules/mole} \approx 1.5055 \times 10^{23}) molecules. Thus, there are approximately (1.51 \times 10^{23}) molecules in 0.25 mole of P4.
5*23*2 = 23*5*2 (commutative property)= 23*(5*2) (associative property) = 23*10 = 230.
There are (~6.022 \times 10^{23}) atoms in one mole of sulfur. Therefore, in 3 moles of sulfur there are (~3 \times 6.022 \times 10^{23} \approx 1.807 \times 10^{24}) atoms of sulfur.