The table below shows the freezing points of four substances. substance freezing point (°c) benzene 5.5 water 0 butane –138 nitrogen –210 the substances are placed in separate containers at room temperature, and each container is gradually cooled. which of these substances will solidify before the temperature reaches 0°c? benzene water butane nitrogen

Benzene.

Explanation:

So, benzene is the substance will solidify before the temperature reaches 0°C because its freezing point is 5.5°C.

 Benzene

Explanation:  The freezing point is the temperature at which the liquid solidifies or passes into a solid state. According to the precise professional, scientific vocabulary, it is the temperature at which the liquid and solid state of the substance is in equilibrium at atmospheric pressure. For example, the water freezing point is 0 ° C, which is at the same time the melting point, that is, when the water from the solid state, ice, passes into the liquid state.

According to given freezing points for these four substances that are placed in separate containers at room temperature and which are gradually cooled, the first substance which will solidify first before the temperature drops to 0 ° C is benzene because its freezing point is 5.5 ° C.

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.