The density of water is 1 g/c m 3 . Use your answer from Question 107 to compare the densities of water and a black hole. [ 107. Astronomy The black hole in the M82 galaxy has amass about 500 times the mass of the Sun. It has aboutthe same volume as the Moon. What is the density ofthis black hole?mass of the Sun = 1.9891 × 1 0 30 kgvolume of the Moon = 2.1968 × 10 10 k m 3 ]

Q: An atom of rhodium (RhRh) has a diameter of about  2.7×10−8cm2.7×10−8cm. What is the radius of a…

A: The radius of an atom is half of its diameter. 1 Å = 10−8 cm

Q: 15. This ForeverspinTM top os made of pure carbon, with an Atomic Mass of 12. This top weights 9…

A: P

Q: Express your answers to at least 5 significant figures.  The mass of one mole of boron is 10.811 g.…

A: Using mole concept easily determines number of atoms and molecules present in one mole of substance.

Q: 2. The approximate radius of a nucleus, r, is given by the formula r = A$(1.3x10-13cm), where A is…

A: Given: Atomic radius of Al = 143 pm Radius of nucleus=A13(1.3×10-13) cm

Q: 5.6 x 1012 is .. .... Small than 1 O Larger than 1 60,900,000 is equal to 6.9 x 10° О 6.09 х 10°…

A: We know 10 to the power something minus is a verry small number if the multiplier is not a large…

Q: Mercury emits a number of discrete wavelengths of visible light when an electric current passes…

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Q: A sample of sodium reacts completely with 0.142 kgkg of chlorine, forming 234 gg of sodium chloride.…

A: A)  Given :- mass of Cl2 = 0.142 kg or 142 g  Mass of NaCl formed = 234 g  To be calculated :-  Mass…

Q: The radius of a lead atom is 175 pm. How many lead atoms would have to be laid side by side to span…

A: Initially we need to convert Picometer to Millimeter.

Q: In heavy water, each of the hydrogen atoms is replaced by a deuterium atom. If the density of…

A: Heavy water is the deuterium oxide, which is another form of water containing heavier isotope of…

Q: 9) A cube containing two sodium atoms has a mass of 7.64 x 1023 g and a density of 0.963g/cm³.…

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Q: Bromine (Br) and mercury (Hg) are the only two elements that occur as liquids at room temperature…

A:

Q: Use your calculator to determine the answer to the following calculation: 1.0×10–15 4.2×10-7 Express…

A: The calculation is given below:

Q: An atom of rhodium (Rh) has a diameter of about  2.7×10−8cm2.7×10−8cm   If the atom is assumed to…

A: The diameter of the rhodium atom is = 2.7×10-8 cm The volume of rhodium atom in m3 is =?

Q: Mercury is commonly supplied in flasks containing 34.5 kg (about 76 lb) of the element, which has a…

A:

Q: 3. carbon occurs in nature in the form of two isotopes: 120 and 130. Calculate the percentage of…

A: The formula used for average atomic mass (AAM)    AAM = ∑ isotopic mass x abundance /100 Where…

Q: Period 3 The table below shows two physical properties of four substances temperature(28 oC). Which…

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Q: Calculate the radius in nanometers of a metallic atom given that it has a BCC structure and a…

A: At first, we have to find the value of edge length from the crystal density formula, then, radius .…

Q: You have a mole of ping pong balls and want to ship them to a near-by town. You have packing boxes…

A:

Q: Neutron stars are composed of solid nuclear matter, primarily neutrons. Assume the radius of a…

A: Mass of neutron = 1.0087 u and 1 u = 1.6605 × 10 -27 kg Hence , Mass of neutron = 1.0087 × 1.6605 ×…

Q: 22. The density of magnesium is 1.74 g/cm. What is the mass of a magnesium block that measures 2.5…

A:

Q: Calculate the edge length in m and the volume in L for a cubical box that will “exactly” contain…

A: Given that: Number of Argon atoms present  = 4.32 x 1023 Diameter of Argon (D)= 3.4A° = 3.4×10-10m…

Q: The radius of a barium atom is 217 pm. How many barium atoms would have to be laid side by side to…

A: Given that,radius of barium atom = 217 pm distance between one atom to another = 2.78 mm 1m = 1x1012…

Q: The radius of a barium atom is 217 pm. How many barium atoms would have to be laid side by side to…

A:

Q: The mass of an electron is. 9.109 X 10 3³1 Kg. The mass of Kg₁ a proton is 1.693 x 10-27 kg. How…

A: Atom of elements contains electrons, proton and neutrons in nucleus nuetron and protons are present.

Q: The different colors of light have different wavelengths. The human eye is most sensitive to light…

A: Since you have asked multiple question we will solve the first one for you. If you want answer to a…

Q: what is an atom? What is it characteristics? How does an atom live and exists in

A: An atom is the fundamental unit of matter, consisting of a nucleus at its center, which is…

Q: The density of Neon (Ne) at a specific temperature and pressure is 3.21 x 10-5 lb/in3. Calculate the…

A: Given: The density of Neon (Ne) at a specific temperature and pressure = 3.21 x 10-5 lb/in3  We have…

Q: About two centuries ago, Benjamin Franklin showed that 1 teaspoon of oil would cover about 0.5 acre…

A: The volume of the oil (V) = Area (A) x Thickness (T), or T = V/A  Given: The volume is 5.0 cm3. The…

Q: Percentage Abundance. The element rubidium consists of two isotopes, one having an isotopic mass of…

A:

Q: The radius of a tungsten atom is 137 pm. How many tungsten atoms would have to be laid side by side…

A: Given :- radius of tungsten atom = 137 pm  To calculate :- number of tungsten atoms in 1.99 mm

Q: The radius of a potassium atom is 231 pm. How many potassium atoms would have to be laid side by…

A:

Q: Part A - Determining Density and Using Density to Determine Volume or Mass Platinum, Pt, is one of…

A:

Q: The maximum level that the EPA considers safe for lead air pollution is 1.5 micrograms per cubic…

A: Given : Volume of lungs = 5.30 L And maximum safe level concentration of lead = 1.5 µg/m3

Q: The radius of a spherical aluminum atom is 140 pm. How many aluminum atoms could fit lines across…

A: The vertical length of the page is provided. The width of the page or the shape of the page is not…