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bekas [8.4K]
3 years ago
14

What is flame emission spectroscopy

Chemistry
1 answer:
zmey [24]3 years ago
3 0
Flame emission is a method of chemical that uses intensity of light from a flame.
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Complete each equation with a number that is true.<br>5 * _ =15
natali 33 [55]

The answer is 3. As 5 * 3 = 15.

Is there any other equations I may be able to help you with? :)

5 0
3 years ago
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Each of the following organs had a role in excretion, EXCEPT for the _____?
eimsori [14]

Answer:

c. the heart

all the rest actually will excrete, the heart is in a closed system so contributes to excretory organs but doesn't actually do it barring an accident

Explanation:

8 0
3 years ago
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The elements of ________ are: 1) the felonious taking of personal property, 2) from the person or immediate presence of another,
erma4kov [3.2K]

Answer:

robbery

Explanation:

The elements of robbery are 1) the felonious taking of personal property, 2) from the person or immediate presence of another, 3) against the will of the victim, and 4) accomplished by means of force or by putting the victim in fear.

Action of taking property by unlawfully from a person or place by force or threat of force is called robbery and all above condition satisfies the term robbery hence robbery is correct match.

4 0
3 years ago
What happens when a substance undergoes a physical change? Some physical properties change, but the substance keeps its identity
elena55 [62]
Some physical properties change, but the substance keeps its identity.

When dealing with these kind of questions, understand that the keyword here is physical change. Thus, all options that says no physical properties change are WRONG. So this leaves us with only 2 answers left. However, this is a physical change, no chemical change. Thus, the substance will keep its identity and not change.

8 0
3 years ago
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Calculate the enthalpy for the following reaction. During the reaction, the temperature changes from 42.5 C to 37 C. The specifi
Dahasolnce [82]

Answer:

q = 0.810 Kj/mol

Its an endothermic reaction

Explanation:

Enthalpy can be evaluated by using following formula -

q = m * c* \delta T

where

q is the enthalpy or change in internal energy

m is the mass in kg

c is the specific heat

and \delta T is the change in temperature

Mass of HCl is equal to 36.46 g/mol

or

Mass of HCl is equal to 0.03646  Kg/mol

Substituting the given values in above equation, we get-

q = 0.03646 * 4.04 * (42.5 - 37)\\q = 0.03646 * 4.04 * 5.5 \\

q = 0.810 Kj/mol

Enthalpy is positive thus it is an endothermic reaction

4 0
3 years ago
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