Exercice 1 Une soupe du commerce contient du sel à la concentration en masse Cm = 9,8 g. L.

1.1. Quelle masse m de sel contient un bol de soupe de volume V = 380 mL ?

1.2. La dose maximale de sel recommandée par jour est 5 g. Cette soupe est-elle trop
salée ?

Exercice 2

Manon se prépare un thé avec deux morceaux de sucre.

Calculer la concentration en masse Cm de sucre dans le thé.

Données
- Masse d'un morceau de sucre:m = 6g
- Volume de thé : V = 250 mL.

Aphysical change is a change in the size, shape,, or stafe of matter true or false

A0.750 kg aluminum pan is removed from the stove and plunged into a sink filled with 10.0 kg of water at 293 k. the water temperature quickly rises to 297 k. what was the initial temperature of the aluminum pan? the specific heat of aluminum is ca = 900 j/(kgk) and water is cw = 4190 j/(kgk)

Aplayground slide is 8.80 ft long and makes an angle of 25.0° with the horizontal. a 63.0-kg child, initially at the top, slides all the way down to the bottom of the slide. (a) choosing the bottom of the slide as the reference configuration, what is the system's potential energy when the child is at the top and at the bottom of the slide? what is the change in potential energy as the child slides from the top to the bottom of the slide? (include the sign of the value in your answer.)