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Vlada [557]
4 years ago
10

What is the color would phenolphthalein be if placed in water

Chemistry
1 answer:
Naily [24]4 years ago
7 0
It's would turn pink in a basic solution suck as water.
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What type of decay characterizes the change of radioactive nuclides to their respective daughter products?
tigry1 [53]
I believe the correct answer is the second option. The type of decay that characterizes the change of nuclides to their respective daughter products would be exponential decay. This type of decay is characterized by the decrease of quantity of a material according to the equation y=ab^x.
8 0
3 years ago
What is the value for ∆Soreaction for the following reaction, given the standard entropy values?
Vesnalui [34]
The standard entropy for the substances are as follows:

C6H12O2(s) = -212 
<span>O2(g) = -205 </span>
<span>CO2(g) = -214 </span>
<span>H2O(l) = -70
</span>
We calculate the ∆S°r<span>eaction by the expression:

</span>∆S°rxn = ∆S°products - ∆S° reactants 
∆S°rxn = (212+6x205)-(6x214+6x70) 
∆S°rxn = -262 J/K ------> OPTION 3
6 0
3 years ago
The average adult human burns 2.00x20^3 kcal per day in energy. What is this rate in kJ per hour?
IRISSAK [1]

Answer:

1.61 × 10⁶ kJ

Explanation:

The human burns energy so as to be healthy.

The amount of energy burnt per day by an adult human is 2 × 20³ kcal per day. Since there is 24 hours in a day, the amount of energy burnt per hour is 2 × 20³ × 24 = 48 × 20³ kcal per hour.

The conversion rate of kcal to kJ is 1 kcal = 4.184 kJ. Therefore converting the kcal per hour to kJ per hour gives:

48 × 20³ × 4.184 = 200.882 × 20³ kJ = 1.61 × 10⁶ kJ

7 0
4 years ago
Voltage causes current all of the choices O pushes free electrons around a circuit is measured in Volts​
tiny-mole [99]

Answer:

B: All of the choices!

Explanation:

Choice 1: Simply, there is no current without voltage, so it DOES cause current.

Choice 3: Voltage DOES push free electrons around a circuit. Without it, free electrons will move around between atoms, but randomly, so they wouldn't be much use.

Choice 4: Voltage IS measured in volts, so this option is true as well.

Choice 2: Voltage is all of those answers, so it is true! :D

Hope i helped! :]

5 0
3 years ago
What electrons in an atom take part in chemical bonding, and what are they called
nignag [31]

Explanation:

The electrons in the outermost electron shell are responsible for forming chemical bonds. These electrons are also known as valence electrons

4 0
3 years ago
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