We can think of each fraction as 1 unit cut into ten equal size pieces. In one unit we would shade 8 of the 10 pieces to represent 8/10 and we would shade 9 out of the 10 pieces on the other unit, because we can see that the second unit has 9 out of the 10 pieces shaded we know that 9/10 is the larger fraction. Benchmark 7/13 and 11/23 are best compared through the benchmarking strategy. We are going to use ½ as our benchmark for these two fractions. First we need to divide each of the denominators by 2 to get 6.5 and 11.5 respectively.
Use the standard normal distribution table to find the value of Z that satisfies the following conditions: a.) the point z with 25% of the observations falling to the left of it, b>0 the point z with 40% of the observations falling to the right of it. Answer: a. the closest value is
1. The relationship between Mercury’s rotational period and orbital period is a resonance. This results from the Sun’s tidal force on Mercury and its very elliptical orbit. The sun cannot lock Mercury into a 1:1 rotation due to Mercury’s high eccentricity. Mercury takes 59 Earth days to rotate and and 88 days to orbit so it spins three times for every two orbital periods.
One mole of Ammonium dichromate will give rise to one mole of 1 mole of Chromium (III) oxide and 1 mole of Nitrogen gas and 4 moles of Water is gaseous phase. To convert these into formula units, 1 mole of any compound will equal 6.022X1023. So based on this, 1 mole of Ammonium dichromate is 6.022X1023 formula units. 1 mole of Chromium (III) oxide is 6.022X1023
Explain what is meant by relative atomic mass?- Relative atomic mass is the measure of the mass of an element which consists of the protons and neutrons; it is always the bigger number and has the symbol Ar. An obvious example of this is oxygen has the Ar of 16 yet sodium has the Ar of 23. Explain how relative formula mass is calculated using the periodic table- You need to find the relative atomic mass (M) for each atom but this can only be done when the relative atomic mass have been found, then you add all of the masses in the compound together to find the RFM. Sodium Hydroxide is the example we used within our experiment. Na= 23 O= 16 H= 1 NaOH 23 + 16 + 1 = 40 NaOH Mr= 40 Explain how it is possible to work out amounts of substance
Facts: ● The Sombrero Galaxy may not be part of a formal galaxy group, but could be a member of a string of galaxies that extends away from the Virgo Cluster. ● As many as 2,000 globular clusters swarm around the core of the Sombrero Galaxy, and the number could be related to the size of the central bulge. ● The Sombrero has a central supermassive black hole at its heart. Observations of star motions near the black hole suggest it could have the mass of a billion Suns, perhaps the most massive of any black hole found so far at the heart of a galaxy. ● The Sombrero Galaxy is a favorite target for well-equipped amateur astronomers.
Essentially, Book V is the most extensive and critical of the six books. He thoroughly elaborates and investigates the motions in longitude of the five planets and the size of their orbits in relation to that of the earth (Armitage, 1990, pg. 70). Nicolaus repeatedly overrides Ptolemy’s theory in this section of the piece. Book VI simply explains the movement of the planets in latitude.
This method is nearly always incorrect because it is difficult to obtain a perfectly saturated solution. In most cases, the solution remains unsaturated or it does not dissolve all the way. Also, for measuring the molar mass using freezing point depression for ionic compounds, it is important to determine the concentration of the particles of the solute, as the Van Hoff factor is not one, as it is for molecular solids. According to Atkins Peter, author and chemist of the book, Physical Chemistry says, “In predicting the expected freezing point of a solution, one must consider not only the number of formula units present, but also the number of ions that result from each formula unit, in the case of ionic compounds.” Therefore, this method works, but it is approximate and it works better for low solute concentrations. The presence of solute lowers the freezing point, which in turn affects the calculations to determine the molar mass of the unknown.
In October 1923 Hubble spotted what he first believed was a nova star flaring up in the M31 nebula. After examining several photos of the area, he realized that it was a Cepheid star. Using Shapley’s method, Hubble placed M31 a million light-years away. Discovering this, Hubble realized that there are more galaxies other than ours. This discovery is often referred to as the discovery of the universe and cosmos.
Aspect ratio is a mathematical expression of the ratio of the width of a screen size or film format to its height. In expressing an aspect ratio, the width, which is typically always the greater length, is given first, followed by the height. The screen aspect ratio of standard television is 1.33 to 1, which simply means that standard definition television screens and programming formatted to run on this aspect ratio are 1.33 times as wide as they are high. This is also more commonly expressed as a 4:3 aspect ratio. To make the math simple, this would simply mean that if a television screen were 30 inches high it would be 40 inches wide given its aspect ratio of 4:3.