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Vera_Pavlovna [14]
3 years ago
12

For a science experiment, a student rubs a mineral against a porcelain plate. The students has just performed

Chemistry
2 answers:
Gemiola [76]3 years ago
6 0
The correct answer is letter B: A streak test.
frosja888 [35]3 years ago
4 0

B.Streak Test.Hope this helps! :)

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Which one is a true statement about endothermic reactions? A. I need you from an outside source is continuously being added. B.
tekilochka [14]
Correct answer: "A. Energy from an outside source is continuously being added."
An endothermic reaction is a reaction that is characterised by the system absorbing energy from its surroundings. That energy is usually in heat form. For example, when mixing water<span> with potassium chloride, this reaction will absorb heat and the container will feel cold - endothermic reaction.</span>
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3 years ago
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When a catalyst is added to a reversible reaction in equilibrium state the value of equilibrium constant
Sergio [31]

Explanation:

The value of equilibrium constant doesn't change when a catalyst is added.

Equilibrium constant depends on Concentration of reactants , Pressure and Temperature.

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3 years ago
Convert 32.56 km/hr into ft/hr
Gekata [30.6K]
Note that
1 m = 3.2808 ft

Therefore
1 km = 3280.8 ft
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32.56 \,  \frac{km}{h} = (32.56 \,  \frac{km}{h})*(3280.8 \,  \frac{ft}{km}) =  1.0682 \, \times 10^{5} \, \frac{ft}{h}

Answer: 1.0682 x 10⁵ ft/hr

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3 years ago
A science student wants to use distillation to separate a mixture of two
statuscvo [17]

Answer:

Boiling point

Explanation:

Distillation is one of the most widely used separation technique in chemistry. It is used to separate a mixture of liquid substances with different boiling point. Hence, the basis of the separation is BOILING POINT DIFFERENCE.

In the procedure, the liquid substances are heated until they turn gaseous, which they do at different times considering their different boiling points. The separated components are then converted back to liquid states in a process called CONDENSATION.

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Which characteristics describe the genetic code of humans? Select three options
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Heart,face,and girl heeeedeeeeedsdeeeeseeeeeeeejdhdhdhdhhdhdhhdhdhdhdhhdhdhdhhdhdjdjdjjdhdhfhfhhfhfhdhhfhhd
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