An indicator is what type of compound?a. reducing agent
b. oxidizing agent
c. weak base or acid
d. strong base or acid

Answers

Answer 1

Answer: The letter (d.) strong base or acid would be the most appropriate answer to the question above. An indicator is a strong base or acid. Indicators are strong base and acid because through this you can determine if a compound is acid or base with its color.

Answer 2

Answer:

Indicators are compounds which are weak bases or weak acids as they can dissociate into ions .The correct option is C.

Indicator is defined as a chemical substance which is chemically a weak acid or a weak base which changes it's color depending upon the concentration of hydrogen ions present in the solution.They dissociate slightly in water to produce ions.

These are generally derived from plant pigments and are of slightly acidic or basic in nature.There are three types of indicators:

1) natural indicators

2) synthetic indicators

3) olfactory indicators.

These are mainly used in determination of end point of titrations. Every indicator has it's pH range in which it can perform effectively.These are usually organic compounds.

As weak acids and bases are easily dissociated ,thus indicators are weak bases or weak acids.Thus, the correct option is C.

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. A solution is prepared by dissolving 23.7 g of CaCl2 in 375 g of water. The density of the resulting solution is 1.05 g/mL. The concentration of CaCl2 in this solution is __________ molar. a. 0.564
b. 0.571
c. 0.569
d. 0.537
e. 0.214

Answers

Answer:

The concentration of CaCl2 in this solution is 0.564 molar (option A)

Explanation:

Step 1: Data given

Mass of CaCl2 = 23.7 grams

Mass of water = 375 grams

Density of solution is 1.05 g/mL

Step 2: Calculate total mass

Total mass = mass of CaCl2 + mass of water

Total mass = 23.7 grams + 375 grams = 398.7 grams

Step 3: Calculate volume of the solution

Density = mass / volume

Volume = mass / density

Volume = 398.7 grams / 1.05 g/mL

Volume = 379.7 mL = 0.3797 L

Step 4: Calculate moles CaCl2

Moles CaCl2 = mass CaCl2 / molar mass CaCl2

Moles CaCl2 = 23.7 grams / 110.98 g/mol

Moles CaCl2 = 0.214 moles

Step 5: Calculate concentration

Concentration of CaCl2 = moles / volume

Concentration of CaCl2 = 0.214 moles / 0.3797 L

Concentration of CaCl2 = 0.564 mol / L = 0.564 molar

The concentration of CaCl2 in this solution is 0.564 molar (option A)

In performing chest compressions on a child, the breastbone is compressed to the depth of how many inches? a) 1/2 b) 1 1/2 c) 2. d) 2½

Answers

Answer: A is correct

Explanation: sorry if its wrong

Which of the following can be produced at an ocean continental convergent boundary,_______________ ??????????????????HELP!

Answers

Continental volcanic arcs are formed at oceanic-continental convergent boundaries

You didn't give a following list of possible answers. Anyways, volcanic mountains can be produced at an ocean continental convergent boundary.

NO, because dental varnish interferes with the bonding and setting reaction of composite resins and glass ionomer restorations the use of varnish is contraindicated with these materials.

Answers

Answer:

Explanation: NO, because dental varnish interferes with the bonding and setting reaction of composite resins and glass ionomer restorations the use of varnish is contraindicated with these materials.

THe following elements are found in what part of the periodic table Germanium, astatine, tellurium, and arsenic?

Answers

They are elements of group IV

Stalactites and stalagmites are examples of _____.organic sedimentary rock
contact metamorphism
extrusive igneous rock
chemical sedimentary rock

Answers

The right option is; chemical sedimentary rock

Chemical sedimentary rocks are rocks that are formed by precipitation of minerals from water. Chemical sedimentary rocks are also called evaporates and they are usually composed of the minerals halite (calcium chloride) and gypsum (calcium sulfate). Examples of chemical sedimentary rocks include stalactites, stalagmites, rock salt, flint, and some dolomites.

Answer:

The correct answer is option D, chemical sedimentary rock

Explanation:

Both stalactites and stalagmites are called drip stone as they are formed of the dripping water consisting of minerals. Both stalactites and stalagmites hang up from the ceiling of caves. These are also refereed to as Chemical sedimentary rocks formed by precipitation. The three major processes involved in the formation of these two rocks are –

a) Physical weathering – which disintegrates the minerals contained in the igneous, sedimentary, or metamorphic rock

b) Chemical weathering – which involves dissolution of weathered rock minerals

c) Precipitation of the dissolved minerals.

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Match the following definition to the type of solution it describes. unsaturated solution saturated solution supersaturated solution A. The amount of solute dissolved is less that the maximum amount the solution can hold. B. The amount of solute dissolved is the maximum amount the solution can hold. C. The amount of solute dissolved is more than the usual maximum amount.

student has calibrated his/her calorimeter and finds the heat capacity to be 14.2 J/°C. S/he then determines the molar heat capacity of aluminum. The data are: 25.5 g Al at 100.0°C are put into the calorimeter, which contains 99.0 g H2O at 18.6°C. The final temperature comes to 22.7°C. Calculate the heat capacity of Al in J/mol·°C.

All atoms of the same element have the same ____.