A test tube becomes cool to the touch.
Explanation:
The signs for an endothermic reaction would most likely be that a test tube becomes cool to touch. An endothermic reaction is a reaction in which heat is absorbed from the environment.
- At the end of this heat change, the surrounding becomes colder.
- Most endothermic reactions are always shown by the test tube becoming colder.
- For exothermic reaction in which heat is given off to the surroundings, the tube should be hotter.
Learn more:
Exothermic reactions brainly.com/question/10567109
#learnwithBrainly
B is correct
salt lowers the freezing point of water (colligative property) by lowering the interaction and intermolecular forces between water molecules
Diamond and graphite are made of carbon. So is most of charcoal.
Answer: Predominant tropical easterly winds sweep across the central and southern portions of the state, keeping the temperatures mild
Explanation:
bc
Density is given by the equation D=m/V, were D is density, m is mass in grams, and V is volume in cubic centimeters.
In this problem, we have density and we have mass so we can plug into the equation and solve for V.
38.6=270.2/V
<em>*Multiply both sides by V*</em>
38.6V=270.2
<em>*Divide both sides by 38.6*</em>
V=7
The volume of the gold nugget is 7cm3.
Hope this helps!!
