When a molecule of nad+ gains a hydrogen atom, the molecule becomes reduced.

Please help me dont just use me for points

JulijaS [17]

Answer:

It's B

Explanation:

A is going to evaporate more quickly causing it to push through the tube to beaker B.

4 0

2 years ago

For a specific enzyme/substrate system, which condition will always result in an increase in Vo (assuming nothing else changes)?

inessss [21]

<span>a decrease in Km and an increase in Vmax
km is the constant that relates how thick the volume of the substrate in terms of concentration when the speed is a large portion of the most extreme. They increment Km by meddling with the joining process that makes them stick together wit the substrate, however they have any effect with regards to Vmax since since the sticking process to ES did not occur</span>

8 0

3 years ago

A 50.00 g sample of an unknown metal is heated to 45.00°C. It is then placed in a coffee-cup calorimeter filled with water. The

AysviL [449]

Answer:- Heat lost by the metal is 279.45 cal.

Solution:- This type of problems are solved by using the concept, heat given = - heat taken

Metal temperature is decreasing from 45.00 degree C to 11.08 degree C. It means the heat is lost by the metal and this heat lost by metal is gained by water and the calorimeter to raise their temperature.

the equation we use is, $q=mc\Delta T$ .

where, q is the heat energy, m is mass, c is specific heat and $\Delta T$ is change in temperature.

Combined mass of calorimeter and water is 250.0 g and the specific heat is $\frac{1.035cal}{g.^0C}$ .

$\Delta T$ for calorimeter and water (combined) = 11.08 - 10.00 = 1.08 degree C

$\Delta T$ for metal = 11.08 - 45.00 = -33.92 degree C

let's plug in the values in the above equation and calculate heat gained by combined system.

q=250.0g*\frac{1.035cal}{g.^0C}*1.08^0C

q = 279.45 cal

So, the heat lost by the metal is 279.45 cal.

3 0

3 years ago

Read 2 more answers

Every organism requires a set of instructions that specifies its traits. Which statement best describes the hereditary informati

Daniel [21]

D genes are located on the chromosomes

7 0

3 years ago

Sophia and her friend Nora have the same unknown solid. Sophia has progressed a little faster with the purification process, but

Katarina [22]

Answer:

Nora used a minimal volume of hot solvent, this hot mixture was filtered to remove insoluble impurities. She had to perform a rapid filtration with a minimum of evaporation in a short-stemmed funnel previously heated in an oven, and provided with a pleated filter to increase the filtration rate, so in this way she prevented the product from crystallizing prematurely on the funnel stem.

If with this technique does not reach a pure substance, the process can be repeated by heating the solvent, changing the funnel or looking for a solvent with high dissolution power of the substance.

Explanation:

The solid products obtained in a reaction are usually accompanied by impurities that must be removed in order to dispose of the desired product in the highest possible purity. The most suitable method for removing impurities that contaminate a solid is by crystallization either in a pure solvent or in a mixture of solvents. This procedure is given the generic name of recrystallization.

3 0

2 years ago