

How many grams of phosphorus are contained in 18.9g of K_3PO_4? How many molecules of CusO_4...
how many molecules are contained in a 7.05
How many molecules are contained in a 7.05-g sample of dimethylmercury? Express your answer in molecules to three significant figures. What is the percentage of mercury (by mass) in the sample? Express your answer as a percent to four significant figures.
How many water molecules are contained in 45.0 grams of water?
a. How many moles are there in 36 grams of carbon? b. How many grams are there in 3 moles of sodium c. how many grams are there in 2 moles of water? d. How many moles in: 6.22 grams of aluminum e. How many moles in 1.26 mg of gold? f. how many moles in 5.2 kg of carbon? 3. Calculate the molar mass of sodium nitride 4. Calculate the molar mass of sulfuric acid 5. Give the percent...
1. How many ATOMS of phosphorus, are present in 4.10 moles of tetraphosphorus decaoxide, P4O10? __________ atoms of phosphorus 2. How many MOLES of oxygen are present in 1.75×1021 molecules of tetraphosphorus decaoxide? ___________ moles of oxygen 3. How many ATOMS of phosphorus are present in 7.95 grams of tetraphosphorus decaoxide, P4O10? ________atoms of phosphorus 4.How many GRAMS of oxygen are present in 1.75×1021 molecules of tetraphosphorus decaoxide? _________grams of oxygen
a) What is the mass of 1.05×1024atoms of chromium? grams b) How many chromium atoms are there in 41.7 grams of chromium? atom c) How many MOLECULES of phosphorus triiodide are present in 7.51 grams of this compound? molecules. d) How many GRAMS of phosphorus triiodide are present in 3.55×1022molecules of this compound? grams.
How many grams of phosphorus (P4) are needed to completely consume 20.3 L of chlorine gas according to the following reaction at 25 °C and 1 atm? phosphorus (P4) ( s ) + chlorine ( g ) phosphorus trichloride ( l ) _____ grams phosphorus (P4)
Determine how many electrons there are in total in your body and what is the total electrical charge of these electrons. Keep in mind that most of the atoms in your body have the same number of electrons, protons and neutrons. Consider the average composition of the human body of 75 kilograms mass as: 65% Oxygen, 19% Carbon, 10% Hydrogen, 3% Nitrogen, 2% Calcium and 1% Phosphorus. The atomic number of Oxygen is 8 and its atomic mass is 16...
мимитисмо 1) How many moles are in 15 grams of lithium? 2) How many grams are in 2.4 moles of sulfur? 3) How many moles are in 22 grams of argon? 4) How many grams are in 88.1 moles of magnesium? 5) How many moles are in 2.3 grams of phosphorus? 6) How many grams are in 11.9 moles of chromium 7) How many moles are in 9.8 grams of calcium? 8) How many grams are in 238 moles of...
How many molecules are contained in each of the following number of moles? Report your answer using two significant figures. a. 5.6 mol of penicillin molecules b. 0.84 mol of NH3 molecules a. × 10 molecules
1. How many grams of phosphorus (P4) are needed to completely consume 9.19 L of chlorine gas according to the following reaction at 25 °C and 1 atm? phosphorus (P4) ( s ) + chlorine ( g ) --->phosphorus trichloride ( l ) ____ grams phosphorus (P4) 2- What volume of oxygen gas is produced when 26.1 g of mercury(II) oxide reacts completely according to the following reaction at 25 °C and 1 atm? mercury(II) oxide (s) ---> mercury (l)...