Question

Ammonium acetate, NH4C2H3O2 is frequently used to create a buffer in solutions. Two moles of this...

Ammonium acetate, NH4C2H3O2 is frequently used to create a buffer in solutions. Two moles of this compound contains:

A. 5 mole of oxygen.
B. 12 moles of hydrogen.
C. 14 moles of hydrogen.
D. 3 moles of carbon.

Which is true about Ba2+ and I- ?

A. They have the same number of neutrons
B. they have the same number of protons
C. they have the same number of electrons
D. they belong to the same group
E. none of the above

How many protons and electrons are present in one Br– ion?
A. 35 p, 35 e
B. 80 p, 34 e
C. 80 p, 81 e
D. 35 p, 36 e

The elements that touch the zig-zag line on the periodic table are known as
A. metals
B. nonmetals
C. metalloids
D. transition metals
E. none of the above

Homework Answers

Answer #1

1. opton C, since one mole of ammonium acetae has 7 moles of hydrogens hence 2 moles of ammmonium acetate has 14 moles of hydrogens

2. option C, I- has 54 electrons (53+1= 54) and Ba+2 has has 54 elctrons (56-2=54)

3. option D,since atomic No of Br is 35 hence 35 protons (no of protons = Atomic No)

it has one -ve charge hence one more extra electron.

total 36 electrons are present in one mole of Br-

4.option C, since Metalloids seperate the metal and non metals in periodic table

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
PLEASE ANSWER ALL QUESTIONS AND EXPLAIN 1.)  The nucleus of an atom has 95 protons and there...
PLEASE ANSWER ALL QUESTIONS AND EXPLAIN 1.)  The nucleus of an atom has 95 protons and there are several isotopes that exist in equal amounts; which is true    a. there must be 95 neutrons    b. the atomic mass is 95    c. the molar mass must be 190g/mol    d. each isotope has a different number of neutrons 2) What does "X" represent in the following atomic symbol?    A) mercury (Hg) B) chlorine (Cl) C) scandium (Sc) D)...
1. True or False? It is possible for a common hydrogen nucleus to emit an alpha...
1. True or False? It is possible for a common hydrogen nucleus to emit an alpha particle. Hint: An alpha particle is a helium nucleus with two protons and two neutrons. A common hydrogen nucleus has only one proton and no neutrons. (a) True (b) False. 16. X-rays are most similar to which of the following: (a) alpha particles (b) beta particles (c) gamma rays 2. True or False? All isotopes of the same element have a different number of...
Q1: What is the definition of isotopes? A: Two elements that have same number of electrons,...
Q1: What is the definition of isotopes? A: Two elements that have same number of electrons, protons and neutrons B: Two elements that have different number of electrons C: Two elements that have identical number of protons, but different number of neutrons D: Three elements that have identical number of protons Q2: Which compound has the highest boiling point in this series? A: Water B: Ethylene C: Caron Tetrachloride D: Ethyl Alcohol Q3: What is the definition of mole of...
1a. You have 2.32 x 1024 molecules of water, H2O. How many moles of water is...
1a. You have 2.32 x 1024 molecules of water, H2O. How many moles of water is this ? a. 18.02 moles b. 3.85 moles c. 6.022 x 1023 moles d. 4.18 x 1025 moles 1b. How many grams of water are in the sample described in part “a” ? a. 18.02 grams b. 2.32 grams c. 69.4 grams d. 6.022 grams 1c. How many hydrogen atoms are the sample described in part “a”? a. 2 b. 2.32 x 1024 c....
Question 37 What mass of H2O is produced by the combustion of 1.00 mol of CH4?...
Question 37 What mass of H2O is produced by the combustion of 1.00 mol of CH4? CH4(g) + 2O2(g) → CO2(g) + 2H2O(ℓ) A. 44 g H2O B. 36 g H2O C. 18 g H2O D. None of the above. Question 35 Which of the following forms a ionic bond ? A. K-Cl B. Br-Br C. N-H D. B and C Question 32 In the following nuclear equation which radioisotope is formed during beta decay of Molybdenum-99. (Fill in the...
QUESTION 29 In a synapse, neurotransmitters do not keep bonding to receptors over and over because:...
QUESTION 29 In a synapse, neurotransmitters do not keep bonding to receptors over and over because: A. they are non polar molecules B. the receptors are quickly removed C. scientists do not know D. they are quickly removed or broken down by an enzyme E. neurotransmitters do not bond to receptors 1.5 points    QUESTION 30 In the cell, proteins that are synthesized by the cell, are normally  produced  directly by (what organelle makes a protein) A. the ribosomes B. the mitochondria...
MC0402: Suppose there are two events, A and B. The probability of event A is P(A)...
MC0402: Suppose there are two events, A and B. The probability of event A is P(A) = 0.3. The probability of event B is P(B) = 0.4. The probability of event A and B (both occurring) is P(A and B) = 0. Events A and B are: a. 40% b. 44% c. 56% d. 60% e. None of these a. Complementary events b. The entire sample space c. Independent events d. Mutually exclusive events e. None of these MC0802: Functional...
The scientific method is best distinguished from earlier forms of knowledge by Accurate measurements              b. inductive...
The scientific method is best distinguished from earlier forms of knowledge by Accurate measurements              b. inductive reasoning           c. deductive reasoning d. publishing of results                 e. experimentation Which one word best describes a tentative explanation of the data? a. control        b. deduction    c. theory          d. placebo       e. hypothesis An explanation which has been widely tested, which is not found to be false, and which explains a large group of observations is called                      a. quantitative analysis           b. a theory Qualitative...
When is a hypothesis considered scientific? a. when it is based on something other than observation...
When is a hypothesis considered scientific? a. when it is based on something other than observation b. when it can be tested and is refutable c. when it relies on anecdotal evidence d. when it relies on mystical explanations e. All hypotheses are considered scientific until experiments determine otherwise. 3. Of the following, which is the earliest step in the scientific process? a. generating a hypothesis b. analyzing data c. conducting an experiment d. drawing a conclusion e. developing a...
1) The Pauli Exclusion Principle tells us that no two electrons in an atom can have...
1) The Pauli Exclusion Principle tells us that no two electrons in an atom can have the same four quantum numbers. Enter ONE possible value for each quantum number of an electron in the orbital given. Orbital n l ml ms 1s There are a total of values possible for ml. 2s There are a total of values possible for ml. 2) The Pauli Exclusion Principle tells us that no two electrons in an atom can have the same four...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT