When a 23.5 ml sample of a 0.430 M aqueous acetic acid solution is titrated with a 0.472 M aqueous barium hydroxide solution, what is the pH at the midpoint in the titration? pH =

Q: Co

A: Isotopes : if two same element have same atomic number but atomic masses are different then we can…

Q: A robot spacecraft returned samples from the planetesimal 98765 ALEKS, located in the outer Solar…

A: Mass of isotope 100Mo = 99.9 (3 significant figures)Relative abundance of 100Mo = 43. % (2…

Q: 4. Identify the Z + 8 element for Si.

A: 4.   Given: Element is Silicon (Si) We have to find the element which is Z+8 for Si

Q: How many protons, neutrons, and electrons are in the following atoms: (a) ²⁸Si; (b) ⁶⁰Ni; (c) ⁸⁵Rb;…

A: Note : As per our guidelines we are supposed to answer first 3 parts .Please resubmit the other…

Q: How many neutrons are present in a 137Ba²+ ion? (a) 81 (b) 83 (c) 56 (d) 58

A: Given that: Element = 137Ba2+Mass number = 137

Q: Which of the following elements is a halogen? a) Sodium b) Carbon c) Fluorine d) Iron

A: As we know that, in the modern periodic table halogens are a group of elements belongs to the group…

Q: Give the noble gas shorthand notation (ex: [He] 2s2 2p1) for U+2

A:

Q: Arrange the following atoms by increasing number of neutrons. 134Ba, 134Ce, 134Xe

A: Given:

Q: What is the Chemical name of K2Cr2O7, H2Te, Ni3(PO3)2 ,  and HCIO2(aq) ?

A: 1. Chemical Name of K2Cr2O7 : Potassium dichromate It is also called as Potassium bichromate or…

Q: Consider the following equation: The mass number of element X is: 213A + 23B 87C+ (x}x + 3 n

A: this problem is based on the conservation of mass. So mass in reactant will be equal to the mass in…

Q: Write the nuclear symbols of the three isotopes of an element with an atomic number of 8 in which…

A: We have to write Atomic symbol for three isotopes of atomic number 8.

Q: A robot spacecraft returned samples from the planetesimal 98765 ALEKS, located in the outer Solar…

A: Answer:We are given percentage abundance of two isotopes of Sn along with their atomic masses and we…

Q: Calalate te mass of Fes formed when 9.42 9 of Fe reacts with 8.505 oks Fe Cs) +2S Cs)- ) Feszcs)

A: Mass of Fe= 9.42 g Mass of S =8.50g

Q: 3. For each of the following symbols, clearly specify the number of protons, the number of neutrons,…

A: ->Number of proton + Number of neutron = Mass number  -> Number of proton = Number of electron…

Q: The radius of Uranium-238 nucleus is about 7.44 × 10-3 pm. Calculate the density of the nucleus (in…

A: Given: The radius of uranium-238 =7.44×10-3 pm Atomic mass of uranium = 238 amu

Q: 13. Consider the table below. What is the relative abundance of isotope A? Isotope Abundance A 65 B…

A: Abundance of A (Abd A) = 65 Abundance of B (AbdB) = 115 Abundance of C (AbdC) = 20 Total Abundance…

Q: 28. a) 60u Calculate the molecular mass of HNO3 b) 63u c) 65u

A:

Q: What is the mass of Cu(C2H3O2)2 ✕ H2O?

A: Molar mass of Cu(C2H3O2)2 .✕H2O = (63.5 x 1) + (12 x 4 + 1 x 6 + 16 x 4) + (18 x X) = 63.5 + 120 +…

Q: (2) (3) If an atom with 38 protons undergoes B-decay, the species formed will have, (A) 37 (B) 38…

A: The nucleus undergoes these emission reactions due to more number of neutrons than protons in the…

Q: Calcula la masa atómica del siguiente compuesto. Desglosado Na3C6H507

A: Translation for the question.

Q: Predict which one is the most stable nucleus amongst _8 O^16, _8 O^17 and _8 O^18. ( In this case…

A: The objective is to determine the most stable oxygen atom.

Q: If mass Q/ mass A in AQ= 0.271 and mass Q/mass A in AxQy= 0.362, what is the formual of AxQy?

A:

Q: Nutritional tables give the potassium content of a standardapple (about 3 apples/lb) as 159 mg. How…

A: The objective of the question is to calculate the grams of potassium in 3.25 Kg of apples. Given:…

Q: What is the total number of oxygen atoms on the right-hand side of this chemical equation? 3 ΗHΝO,…

A: