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April 27, 2021
A 1,000ml sample of acetone a common solvent used as a paint remover was placed in a small bottle whose mass was known to be 38.0015g.The following values were obtained when the acetone filled bottle was weighed 38.7798g,38,7795g,38,7801.how would you cha
December 20, 2021
The time required for a given volume of N2 to diffuse is 35s calculate the molar mass of a gas which requires 50s to diffuse under identical conditions?
January 27, 2022
Thiophene is a liquid of elements c,h, and s a sample of thiophene weighing 7.96gw was burned in air giving 16.65g carbon dioxide anther sample was subjected to a series of reactions that transformed all of the sulphate in the compound to barium sulphate,
March 28, 2022
Discuss the accuracy of the concentration of the NaoH solution you have prepared for this experiment.
April 24, 2022
how many seconds are there in one solar day
May 4, 2022
A titanium bicycle frame contains the same amount of titanium as a titanium cube measuring 7.1cm on a side. Use the density of titanium (4.50 g/cm3 ) to calculate the mass in kilograms of titanium in the frame.
May 14, 2022
How important are compounds in our everyday life
June 23, 2022
Chemistry is also a study of chemical reaction
University of Maryland - University College
If energy flows out of a chemical system and into the surroundings, what is the sign of Esystem?
What is a dipole moment?
What is heat? Explain the difference between heat and temperature.
What is the pH of a buffer when the concentrations of both buffer components (the weak acid and its conjugate base) are equal? What happens to the pH when the buffer contains more of the weak acid than the conjugate base? More of the conjugate base than the weak acid?
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an introduction to chemistry will be covering various concepts that will set the foundation for the topics later on in the course. In our first lecture classifications and properties of matter who will discuss the three states of matter which both physical and chemical properties in the fundamentals of energy, we'll be talking about thermodynamics, a za concept and in chemistry. It's important to understand how energy is stored and can be transferred between molecules, their work and he in units of measurement. We talk about how the units are important for specifying the physical properties that we measure, and several units will look her often throughout your cash records like crams, moles and so on. Uncertainty in measurement tells us about how certain we are about the physical values that we measure, and significant figures tell us information about uncertainty under the topic, accuracy and precision. We talk about how measured physical values can be accurate or inaccurate and precise or imprecise, and it is important to distinguish these terms because they carry different definitions about death. Dimensional analysis helps us convert units of physical quantities into different units, and it is useful if you have a better conceptual understanding of one unit over the other, like a calorie versus jewels under atomic theory and the nuclear model, The atomic theory helps us understand what matter is made of, and the nuclear model helps us understand the building blocks of Adam under atomic structure and atomic weight. We'll learn what atoms are made up, and it's unique structure. The periodic table is organized in a specific way and helps us understand the shared physical properties of various elements, including reactivity under molecules and arms. We'll learn the different ways that atoms can exist in nature specifically as a combination of atoms or charge species they're getting. Compounds are types of molecules that do not contain carbon atoms, bonds and other elements. And organic compounds are molecules that contain carbon atoms bought into other elements. So we'll be learning the differences between thes two compounds in the following lectures.
Chemical reactions and Stoichiometry
Periodic Table properties