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Question 1 Correct 5.00 points out of 5.00 Talc is a mineral with low conductivity for heat and electricity which is not attacked by acid. It is used in talcum powder and face powder. Suppose a sample of talc weighs 13.65 g with a density of 1.75 g/cm3 in mineral oil. If this same sample of talc in air weighs 35.97 g, assuming no volume change, what is the density of the talc sample in air? Select one: A. 2.44 g/cm3 B. 2.82 g/cm3 C. 1.61 g/cm3 D. 4.61 g/cm3 E. 2.63 g/cm3 Question 2...

AQA AS Physical Chemistry 2024 exam questions with 100% correct answers Who described atoms as solid spheres that make up different elements and when? - ANSWERS John Dalton in the 19th century Who suggested that atoms of a particular element had the same mass and atoms of different elements had different masses and when? - ANSWERS John Dalton in 1803 Who discovered the electron and when? - ANSWERS JJ Thomson, 1897 discovered electrons proving atoms weren't indivisible or solid. New m...

GCSE EDEXCEL TRIPLE SCIENCE CHEMISTRY PAPER 2 2024/2025 QUESTION PAPER ALREADY PASSED What does 'aq' mean? - answer Aqueous - it is dissolved in water Water - formula - answer H20 Ammonia - formula - answer NH3 Carbon Dioxide - formula - answer CO2 Hydrogen - formula - answer H2 Chlorine - formula - answer Cl2 Oxygen - formula - answer O2 Ammonium (ion) - formula - answer NH4 (+) Hydroxide (ion) - formula - answer OH (-) Nitrate (ion) - formula - answer NO3 (-) Carbonate (ion) -...

GCSE EDEXCEL TRIPLE SCIENCE CHEMISTRY PAPER 2 2024/2025 QUESTION PAPER ALREADY PASSED What does 'aq' mean? - answer Aqueous - it is dissolved in water Water - formula - answer H20 Ammonia - formula - answer NH3 Carbon Dioxide - formula - answer CO2 Hydrogen - formula - answer H2 Chlorine - formula - answer Cl2 Oxygen - formula - answer O2 Ammonium (ion) - formula - answer NH4 (+) Hydroxide (ion) - formula - answer OH (-) Nitrate (ion) - formula - answer NO3 (-) Carbonate (ion) -...

AQA AS Physical Chemistry Exam Questions and Answers Who described atoms as solid spheres that make up different elements and when? - Answer- John Dalton in the 19th century Who suggested that atoms of a particular element had the same mass and atoms of different elements had different masses and when? - Answer- John Dalton in 1803 Who discovered the electron and when? - Answer- JJ Thomson, 1897 discovered electrons proving atoms weren't indivisible or solid. New model named plum puddin...

AQA GCSE Chemistry - Paper 1 Questions And Answers Rated A+. What is the charge of a proton? - correct answer. +1 What is the charge of a neutron? - correct answer. 0 What is the charge of an electron? - correct answer. -1 What is the relative mass of a proton? - correct answer. 1 What is the relative mass of a neutron? - correct answer. 1 What is the relative mass of an electron? - correct answer. Very small How many types of atoms do elements contai...

IRRSP QUESTIONS AND ANSWERS GUARANTEED A+ CHAPTER 1 D. All the above 1. In the early years of Radiography, what caused personnel to be overexposed? A. Poor equipment design B. Lack of understanding C. Lack of and poor safety practices D. All the above D. Late in 1898 2. In what year did Marie Curie discover Radium? A. The beginning of 1896 B. The end of 1897 C. The beginning of 1898 D. Late in 1898 Brainpower Read More Previous Play Next Rewind 10 seconds ...

LRA Final Exam 211 Radio Physics Real Questions and Answers Latest Update 100% Valid!!

AQA AS Physical Chemistry 2024 exam questions with 100% correct answers Who described atoms as solid spheres that make up different elements and when? - ANSWERS John Dalton in the 19th century Who suggested that atoms of a particular element had the same mass and atoms of different elements had different masses and when? - ANSWERS John Dalton in 1803 Who discovered the electron and when? - ANSWERS JJ Thomson, 1897 discovered electrons proving atoms weren't indivisible or solid. New m...

What are the three states of matter? - Answer-solid, liquid and gas ___ is the study of properties and behavior of matter. - Answer-chemistry ___ is the physical material of the universe. It is also anything the has mass and occupies space. - Answer-matter __ is matter that is made up of one "thing" - Answer-pure substance __ is a mixture that doesn't have the same composition, properties, and appearance throughout. - Answer-heterogeneous __ is a mixture that is uniform throughout. - A...