If 1.38×10^22 atoms of element Y have a mass of 1.50 g, what is the identity of Y?
If 1.38×10^22 atoms of element Y have a mass of 1.50 g, what is the identity...
4. Recall that an element e in any group G is called an identity element if for every g € G, eg = g = ge. (a) Give a counterexample to prove that o is not an identity element in Sx. (b) Give a counterexample to prove that is not an identity element in Sx. (c) Give a counterexample to prove that is not an identity element in Sx. (a) Give a counterexample to prove that p is not an...
1. What is the mass of 1.38×1024atoms of magnesium ? 2. How many magnesium atoms are there in 28.6 grams of magnesium ? 3. What is the mass of 1.69×1023atoms of lead ? 4. How many lead atoms are there in 28.8 grams of lead ? 5. How many moles of Ga are there in a sample that contains 10.9 grams of gallium? 6. How many grams of gallium are there in a sample that contains 2.19 mol of Ga?...
1.The mass spectrum of a hypothetical element shows that 71.51% of the atoms have a mass of 27.977 u, 3.052% have a mass of 28.976 u, and the remaining have a mass of 29.974 u. Calculate the average atomic mass of this element (in units of u). (Use 4 Sig. Fig. Don't round until end.) 2.Bromine occurs naturally as two isotopes, one with a mass of 78.918 u and the other with a mass of 80.916 u. Suppose the average...
The mass of a copper atom is 1.045 x 10E -22 g. How many copper atoms are present in a 94.5 g sample of copper? * Pick the best answer below. Reference lecture and PowerPoint a. 9.04 x 10 exp 23 b. 1.045 x 10 exp -22 c. 1870 d. 94.5
If 1.00 g of element X reacts with 2.00 g of element Y to produce 3.00 g of a compound with the formula X2Y3, and the molar mass of Y is 50.0 g/mol, what must be the molar mass of X? (a) First of all, after reading the question, which element do you know more about, X or Y? (b) How many moles of Y are in 2.00 g of Y, and therefore must be in the X2Y3 ? (c)...
What element has 7.767 x 1017 atoms in 6.57 x 10-5 g of material? Carbon, vanadium, Calcium, Chromium, Strontium
5. What is the mass of 1.63 x 1021 silicon atoms? (A) 2.71 x 10 g (B) 4.58 x 1022g (C) 28.08 g (D) 1.04 x 10 g (E) 7.58 x 102 g
7. A mass of 140 g of a certain element is known to contain approximately 5.27 x 1024 atoms. What is the element? Chlorine Phosphorus Sulfur Nitrogen Silicon Argon Carbon Aluminum Oxygen
7. A mass of 130 g of a certain element is known to contain approximately 5.59 x 1024 atoms. What is the element? Sulfur O Aluminum Argon Phosphorus Nitrogen O Carbon Chlorine Silicon Oxygen
7. A mass of 130 g of a certain element is known to contain approximately 5.59 x 1024 atoms. What is the element? Sulfur O Aluminum Argon Phosphorus Nitrogen O Carbon Chlorine Silicon Oxygen