If a student weighs 18 g of aluminum and needs twice as many atoms of magnesium as she has of aluminum, how many grams of Mg does she need? How many moles of silver (Ag) atoms are there in 3.80 \times 10^{24} silver ...
How many kilograms of salt must be added to 20 kg of an 80% salt solution to produce an 85% salt solution?Answer and Explanation: First we need to determine how much salt and solvent we have: 0.8 * 20 = 16 kg salt Since 80% is salt, 20%...
That's how many joules (the standard measurement of energy) you'd get from a kilogram of mass. In theory, if you could turn about seven billion hydrogen atoms completely to energy, you'd get about one joule (that's about as much energy as a 10-watt lightbulb consumes in a tenth of...
Upon adding hydrogen atoms and counter ions (~150 mM NaCl) and solvating the structures in rectangular water boxes (>16 Å from the box edges and protein) by the VMD software package, we obtained two solvated systems—one for the hybrid and the other for WT H2-Kb—with dimension ...
First, water molecules (two atoms of hydrogen and one atom of oxygen joined together) naturally stick to one another, so they clump together in big droplets on the window. The forces that make them do this are called cohesive forces (and the process involved is called cohesion). Second, ...
so the periodic table may never be complete. These manmade elements are created using particle accelerators thatsmash atoms and subatomic particles together, generating nuclei with extra protons and neutrons. However, these ultra-heavy elements are highly unstable and difficult to make. “We really ...
Multiply the formula weight (or MW) by the desired molarity to determine how many grams of reagent to use: Chemical FW = 194.3 g/mole; to make 0.15 M solution use 194.3 g/mole * 0.15 moles/L = 29.145 g/L Example 2: To prepare a specific volume of a specific molar solution from a...
COUNT ATOM How to count atoms 2H2O COEFFICIENT SUBSCRIPT Words to know Coefficients are whole numbers written to the left of a formula. Subscripts are written to the right of an element. It tells you how many units of that element you have. ...
Superimposition of the R2 repeats from C-Cpl-7R and the wild type form showed highly similar structures (RMSD of 0.31 Å for Cα atoms; Supplementary Fig. S7a). The substitution of arginine 271 by alanine disrupts the cation-π interaction established with Tyr272, whose side chain rotat...
near the hydrogen atoms; it is because of these “polar bonds” that contribute to water’s many properties. Water is generally is referred to as a universal solvent because more substances dissolve in water than any other chemical due to the polarity of its molecule. So where is the water...