Richards and Willard determined the molar mass of lithium and collected the following data.   Experiment Molar Mass, g/mol 1 6.9391 2 6.9407 3 6.9409 4 6.9399 5 6.9407 6 6.9391 7 6.9406

Determine the formula weight of CaCl₂. Provide an answer to two decimal places.

A student caried out this experiment and obtained the following data:  Patm = 656.7 mm Hg    Vinitial  = 0.30 mL    Mass of Alka-Seltzer sample = 0.123 g     TH2O  = 27.0°C                         Vfinal = 17.05 mL Determine the following: a. Calculate the number of moles of carbon dioxide present. b. Calculate the mass of NaHCO3 present in the sample. c. Calculate the mass % of NaHCO3 in the Alka-Seltzer.

1. Solve and choose the correct answer from the given choices: a. How many atoms of tin are found in 3.50 moles of tin? 3.1 x 1024 tin atoms 4.1 x 1024 tin atoms 2.1 x 1024 tin atoms 2. Solve and drag and drop into text the correct answer: The boiling temperature of a liquid is - 8°C. What is its value in Kelvin and Fahrenheit? 225K and 16.8° F 265K and 17.6° F|| 325K and 18.2 F 3. Match the following properties of states of matter as: solid, liquid or gas. Lemonade has a definite volume but takes the shape of container Choose. + The breathing mixture in a scuba tank has no definite volume or shape Choose. Liquid The particles in an ice cube are held in a rigid structure Solid Gas The neon atoms in a lightening display do not interact with each other Choose.. + 4. Would you use the atomic number, mass number or both to determine each of the Following? Match the correct answer. Number of neutrons in an atom Choose... Choose... Number of electrons in an atom Both Mass number Atomic…

: ny F1 ! Q What does a complete balanced chemical equation include? O F2 molar coefficients valence electrons exothermic coefficients 2 endothermic coefficients -0- @ W F3 -Ő+ #m 3 E F4 $ 4 F5 R % F6 T Q F7 6 Y F8 & 7 F9 *00 U 8 H

Find the mass of 1 molecule of NH3 in gram. Oa. 10 O b. 2.82 x1023 Oc. 2.82 x10-23 O d. 17. Clear my choice

AaBbCcDc AaBbCcDc AaBbC AaBbCcC AdB AaBbCcD AaBbCcD AaBbCcD 1 Normal 1 No Spac. Heading 1 Heading 2 Title Subtitle Subtle Em.. Emphasis Styles 4.Suppose you run the reaction yourself and you use 3.0000 g of Cuz0 with an excess amount of hydrogen gas. Cu20 is the limiting reactant and the chemical formula is Cu20. Refer to section 3.7 for this question. Part a: Calculate the number of grams of Cu expected in the reaction. Show each step in your calculation. Label each step. Part b: Suppose that we run the reaction amd 2.5110 g of Cu is produced. Use the result in part a to calculate the reaction yield (% yield)

Find the molar mass of each compound and fill in the chart. Show work below t he table. Remember coeficient applied to the entire compound.

DATA Record all masses to the maximum number of Run 1 Run 2 sig figs 200°C 400°C 1. Mass of beaker 81.061 27.986 2. Mass of beaker + NaHCO3 85.457 32.267 3. Initial mass of NaHCO3 4.476 4.292 Mass of beaker plus products after heating. 4. 84.3 80 30.742 5. Mass of product (actual yield) There are three theoretically possible chemical reactions that could occur during the thermal decomposition of baking soda. 1) sodium bicarbonate (s) → sodium hydroxide (s) + carbon dioxide (g) 2) sodium bicarbonate (s) → sodium oxide (s) + carbon dioxide (g) + water (g) 3) sodium bicarbonate (s)→ sodium carbonate (s) + carbon dioxide (g) + water (g)

help me pls less than 15 mins i'll give you upvote.