What is astrochemistry? a) The study of chemical reactions on Earth b) The study of chemical reactions in space c) The study of chemistry in biology d) The study of chemical engineering in space exploration

Q: -22 A copper atom has a mass of 1.06 x 10 g and a penny has a mass of 2.5 g. Use this information to…

A: Mass of copper atom = 1.06 ×10-22 g Mass of penny = 2.5g We have to find moles of copper atom that…

Q: What do you think is the source of the poisoning phosphorus or radium? From the chemistry…

A: Poisoning from phosphorus and radium can occur through exposure to these substances. Phosphorus is a…

Q: 5 g of anhydrous strontium nitrate is added to a beaker and exposed to the air. After several hours…

A: The percentage of water in hydrated sample is given as : Percentage of water = ( mass of water /…

Q: now.com/ilrn/takeAssignment/takeCovalentActivity.do?locator=assignment-take [References] Cobalt-60…

A:

Q: What are lanthanide elements?

A: What are lanthanide ?

Q: What is radioactive decay? A.theprocess by which an atom of an unstable element can gain stability…

A: The spontaneous emission of radiation from an element is called radioactivity. The elements which…

Q: Hydrazine, N2H4, can be used as fuel to orient and maneuver spacecraft. The energy used to do so is…

A: (A) Writing down the balanced chemical equation: N2O4(l) + 2 N2H4(aq) ----> 3 N2(g) + 4 H2O(l)…

Q: Describe a cathode-ray tube and how it operates.

A: A cathode ray tube (CRT) is a specialized vacuum tube in which images are produced when an electron…

Q: what are electromagnetic radiations? write its characteristics.

A:

Q: Which balanced chemical equation below corresponds to the law of mass action expression: [A]²[C]…

A: The question is based on the concept of law of mass action. we need to write proper equation for law…

Q: Where are elements heavier than helium created?

A:

Q: 3. Exposing yourself to the sun means exposure to many types of electromagnetic radiation: UV,…

A: Interpretation-  To explain which of these radiation would you expect to most harmful when sun…

Q: process

A: Dear student I have given answer to your question in the image format.

Q: Why are the chemical properties of all isotopes of the same element identical?

A: Atoms of the same element, having same number of protons and electrons, but differing only in the…

Q: Looking at isotope ratios, we can determine past climates. Please explain how the ration of Oxygen…

A: There is difference in O-18 and O-16 . Each isotope of oxygen contains 8 protons, but differs in the…

Q: What is the atomic symbol for isotope barium-131? 131 Ba 58 Ba 131 Ba

A:

Q: Calculate the frequency of an X-Ray given that the wavelength is 5.0 nanometers. (Hint: 1 meter =…

A: Given, Wavelength = 5.0nm.

Q: 29. Cosmic background radiation (CMB) is a form of electromagnetic radiation that fills the entire…

A: Given: Wavelength of CMB = 2.0 mm = 0.002 m                                        (Since 1 m = 1000…

Q: ed on the figure from the lecture slides showing the isotopes for the first twenty elements, which…

A:

Q: Determine the speed (in m/s) of an electron with 8.00 × 10-3 J/mol of kinetic energy. Mass of…

A:

Q: Where do free radicals come from? What harm do they do?How is the body protected from free radicals?

A: Free radicals are produced in three main ways: - 1. Metabolic reactions: - The normal chemical…

Q: Is there another method to determine lead in shells without needing digestion? Explain the principle…

A: A question based on analytical process that is to be accomplished.

Q: What are some examples of electromagnetic radiation? And why?

A: Electromagnetic radiation is an electric and magnetic disturbance traveling through space at the…

Q: Which is the most stable free radical? A B C D E

A:

Q: H-2 is a stable atom. However, H-3 is a radioactive element. Give the reason.

A: Hydrogen (Z=1) element having  three Isotopes named as Hydrogen, deuterium and tritium.

Q: What type of decay would you expect tritium, H to undergo? Write the nuclear equation for the…

A:

Q: What are the impications of Thompson related to cathode rays?

A: J.J. Thompson proposed a plum pudding model of the atom in which he stated that it had…

Q: What is the mass number of xenon-127?

A:

Q: Which among the following forms of radiation will impart the greatest amount of energy to the sample…

A: The energy of a photon is given by the following equation -…

Q: What was the Copernican revolution? O A. The discovery that the sun was not the center of the…

A: Copernican revolution is about the model of the solar system and was given by a polish astronomer.

Q: If the laws of physics were different and the primary element in the universe were boron-11 (Z = 5),…

A: Given, If the primary element in the universe is boron-11 what are the four most abundant elements?

Q: is the content for meteorology in  a scientific sense valid or credible, safe

A: Solution - Science of measurement is known as metrology and the main point is to achieve accuracy .…

Q: Write the following as a radical exp 13^((2)/(5))

A: Given  13^((2)/(5)) To find radical expression?

Q: Critically discuss the relationship between a lithium and justice with real life example. (explain…

A: The relationship between lithium and justice is a multifaceted topic that encompasses economic,…