What kind of reaction occurs when a molecule of glucose reacts with oxygen to give carbon dioxide and water?A. an exothermic reaction

B. an endothermic reaction

C. a synthesis reaction

D. an irreversible reaction

Answers

Answer 1

Answer: A) Exothermic reaction. Exothermic reactions occur when energy or a new product is being releases(gas, energy, heat)

Answer 2

Answer: it is a i made a 100 on plato

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How many moles are in 68.5 liters of oxygen gas at STP?

Answers

We can solve this problem when we use the conditions of a gas at standard temperature and pressure. It has been established that at STP where the temperature is 0 degrees Celsius and the pressure is 101.325 kPa, the volume of 1 mole of gas is 22.4 L. We will use this data for the calculations.

68.5 L ( 1 mol O2 / 22.4 L O2 ) = 3.06 mol O2

Explanation:

It is known that at STP, there are 22.4 L present in one mole of a substance.

Therefore, in 68.5 liters there will be 1 mol divided by 22.4 L times 68.5 L.

Mathematically, $68.5 L * (1 mol O_(2))/(22.4 L)$

= 3.05 mol

Hence, we can conclude that there are 3.05 moles present in 68.5 liters of oxygen gas at STP.

Which of the following is not an example of an extensive physical property?A.) Mass
B.) Shape
C.) Color
D.) Volume

Answers

The correct answer is C. Color is not an extensive property because it does not depends on the amount. An extensive property is a property that is dependent on the amount of substance being measured. The opposite is called intensive property where it does not depend on the amount.

. . .. . . . .. . . . . .. . . . . .
The correct answer is C.

Which kind of reaction is shown below?

2H2O2 → 2H2O + O2

Answers

The type of reaction is a redox reaction.

This is a redox reaction/equation.

Which event best helped Becquerel determine uraniun radiates rays ?A)a cloudy day
B)a substance glowing in the dark
C)wrapping of ore in paper
D)exposure of a photographic plate

Answers

Exposure of a photographic plate was the event that best helped Becquerel to determine uranium radiates rays. The correct option in regards to the given question is option "D". Henri Becquerel was a French physicist and he was born on 15th December 1852 and died on 25th August 1908. He was the scientist that discovered radioactivity. In the year 1903, he was awarded with the Nobel Prize for physics for the ground breaking work he did. In the year 1896, Becquerel published seven important papers on his work on radioactivity. This was the work that made him famous around the globe.

Like he said the answer is "D"

What does the molecular formula of a compound describe?

Answers

Answer: Molecular Formulas. Molecular formulas are a compact chemical notation that describe the type and number of atoms in a single molecule of a compound. Identify the molecular formula of a compound given either its name or structural formula.

Explanation:

A solid precipitate is formed from the reaction of lead nitrate and sodium chromate. What would be the best method to separate this solid from the solution?
distillation
evaporation
filtration
sorting