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What principle states that atoms tend to form compounds so that each atom can have eight electrons in its outermost energy level? - rule of eights - Avogadro principle - configuration rule - octet rule

Visakh asked Dec 15, 2024

by Visakh

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183k views

1. For each hazardous chemical material, the pharmacy should be able to find a safety data sheet (SDS) from which of the following places? a. Office Depot b. Post office C. Manufacturer d. Government authority

Samash asked Dec 15, 2024

by Samash

7.8k points

1 answer

2 votes

210k views

A 8.49-g geological sample, containing the mineral Boulangerite (Pb5Sb4S11) as the only lead-bearing compound, is subjected to chemical treatment in which the lead is quantitatively recovered as solid

Onovar asked Dec 15, 2024

by Onovar

8.1k points

2 answers

4 votes

171k views

How many molecules are in 1.4 moles of MnCl2

Gopi K Mishra asked Dec 15, 2024

by Gopi K Mishra

8.1k points

1 answer

2 votes

217k views

A particular photon has a wavelength of approximately 2×10⁻7m. What is the energy, in joules, associated with this photon? A. 0 B. 4×10^−32 C. 1x10^−18 D. 1×10¹8 E. 1.5×10¹5

DimitrisCBR asked Dec 15, 2024

by DimitrisCBR

8.7k points

1 answer

1 vote

178k views

Discrete spectral lines occur when excitation takes place in a: a. gas b. solid c. spectroconductor d. liquid e. all of these

Alex Sarnowski asked Dec 15, 2024

by Alex Sarnowski

8.0k points

1 answer

1 vote

169k views

Foods that are rich in potassium are avocados, apricots, potatoes, milk, and lettuce. a) True b) False

Piwi asked Dec 15, 2024

by Piwi

8.8k points

1 answer

5 votes

5.9k views

How many moles of gaseous boron trifluoride, BF3, are contained in a 4.3410-L bulb at 788.0 K if the pressure is 1.220 atm? How many grams of BF3? a) 0.153 moles, 8.28 g b) 0.231 moles, 12.45 g c) 0.500

Randy Eppinger asked Dec 15, 2024

by Randy Eppinger

8.3k points

1 answer

3 votes

72.9k views

In some areas, drinking water is fluoridated to reduce tooth decay. The maximum acceptable concentration (MAC) of fluoride ions in drinking water is 1.50 ppm. In Dublin, California, a malfunction occurred

Doletha asked Dec 15, 2024

by Doletha

8.1k points

1 answer

3 votes

130k views

7 mcg/kg/min dosage is ordered for an adult weighing 81.3 kg. The solution available is 400 mg in 250 mL. Calculate dosage (in mcg/min) to the nearest tenth and flow rate (in mL/hr) to the nearest whole

Warvariuc asked Dec 15, 2024

by Warvariuc

8.4k points

1 answer

0 votes

51.5k views

You mix 12g of calcium carbonate to neutralize 48 ml of acid. What is the concentration? A) 0.25 g/mL B) 0.5 g/mL C) 1 g/mL D) 2 g/mL

Elmotec asked Dec 15, 2024

by Elmotec

8.4k points

1 answer

3 votes

33.2k views

28. What two functional groups are present on every amino acid? A. A carbonyl (C=O) group and a carboxyl group B. An N-H group and a carboxyl group C. An amino group and a hydroxyl group D. An amino group

Rikamamanus asked Dec 15, 2024

by Rikamamanus

8.5k points

1 answer

4 votes

149k views

Which of the following is an example of a decomposition reaction? A Splitting of water into hydrogen and oxygen B Carbon completely burnt in oxygen yields carbon dioxide C Calcium oxide combined with water

Dmitry Gavrilko asked Dec 15, 2024

by Dmitry Gavrilko

8.4k points

1 answer

3 votes

134k views

Given the following information: N2 bond energy = 941 kJ/mol F2 bond energy = 154 kJ/mol 1/2 N2(g) + 3/2 F2(g) --> NF3 ∆H0 = -103 kJ/mol Calculate the N-F bond energy. Option 1: 397 kJ/mol Option 2: 247

Deshanna asked Dec 15, 2024

by Deshanna

8.1k points

2 answers

3 votes

202k views

A certain liquid has a vapor pressure of 92 torr at 23 c and 300 torr at 45 c. calculate the delt hvap . and find it normal boiling point and give the answers, please

Pmpm asked Dec 15, 2024

by Pmpm

8.7k points

1 answer

1 vote

96.1k views

How many grams are present in 1. 75 moles of carbon dioxide, CO2?

Antony West asked Dec 15, 2024

by Antony West

7.7k points

1 answer

0 votes

32.3k views

What is the conceptual plan for calculating reactions involving gases? A) Boyle's Law B) Avogadro's Law C) Ideal Gas Law D) Charles's Law

Ranguard asked Dec 15, 2024

by Ranguard

8.7k points

1 answer

2 votes

94.0k views

If the magnetic moment and angular momentum of an orbital electron are m and l respectively, the specific charge of the orbital electron is: a) lm b) l/m c) m×l d) m/l²

Madalyn asked Dec 15, 2024

by Madalyn

7.5k points

1 answer

2 votes

199k views

What is the name given to the form of amino acids where a H+ has been released from the carboxyl group and accepted by the amino group? a) Zwitterion b) Isoelectric form c) Peptide bond d) Ester

Max Golovanchuk asked Dec 15, 2024

by Max Golovanchuk

8.7k points

1 answer

5 votes

194k views

A pharmacist needs to make a 25.0 liter of a 4.50 M solution of a substance. The stock solution of the substance is 11.5 M. How much stock and water must be mixed? 2.07 liters of stock and 25.0 liters

JIT Solution asked Dec 15, 2024

by JIT Solution

8.1k points

2 answers

3 votes

205k views

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