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Pavlova-9 [17]
4 years ago
11

How many visible impact craters does the moon contain?

Chemistry
1 answer:
frez [133]4 years ago
5 0
I believe the answer is B. a million or more.
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Plants and algae that convert sunlight to food energy are called
borishaifa [10]
The correct answer is the first choice given. Plants and algaes are producers. They are called as such since they produce their own food by using the energy from the sun, CO2 and water to form glucose as their food.
8 0
3 years ago
A sample of gas contains 0.1800 mol of CO(g) and 0.1800 mol of NO(g) and occupies a volume of 23.2 L. The following reaction tak
baherus [9]

Answer:

The volume of the sample is 17.4L

Explanation:

The reaction that occurs requires the same amount of CO and NO. As the moles added of both reactants are the same you don't have any limiting reactant. The only thing we need is the reaction where 4 moles of gases (2mol CO + 2mol NO) produce 3 moles of gases (2mol CO2 + 1mol N2). The moles produced are:

0.1800mol + 0.1800mol reactants =

0.3600mol reactant * (3mol products / 4mol reactants) = 0.2700 moles products.

Using Avogadro's law (States the moles of a gas are directly proportional to its pressure under constant temperature and pressure) we can find the volume of the products:

V1n2 = V2n1

<em>Where V is volume and n moles of 1, initial state and 2, final state of the gas</em>

Replacing:

V1 = 23.2L

n2 = 0.2700 moles

V2 = ??

n1 = 0.3600 moles

23.2L*0.2700mol = V2*0.3600moles

17.4L = V2

<h3>The volume of the sample is 17.4L</h3>
8 0
3 years ago
In the hydrogenation of ethylene using a nickel catalyst, the initial concentration of ethylene is 2.00mol?L?1 and its rate cons
gavmur [86]

Answer:

The rate of reaction of a zero-order reaction  is 0.0020 mol/L.

Explanation:

The rate expression of the zero order kinetic are :

R=k[A]^o

[A]= initial concentration of reactant

k = rate constant

R = rate of reaction

We have :

Rate constant of the reaction , k = 0.0020 mol/L s

R=0.0020 mol/L s\times 1

R = 0.0020 mol/L s

The rate of reaction of a zero-order reaction  is 0.0020 mol/L.

8 0
3 years ago
The graph below compares the motion of particles in two substances. One substance is a gas and the other is a solid. A bar graph
Shalnov [3]

Answer is: Particles are farther apart in gases so Substance B is a gas.

For example, nitrogen molecules have weakest intermolecular bonds in gas phase and move fast and without order.  

Cooling is change from gas to solids. In solid state (for example ice) movement of molecules is more slow than movement of molecules in the gas (for example water vapor).

The process by which a solid changes directly to a gas without first becoming a liquid is called c. sublimation.

Sublimation is an endothermic process. For example dry ice (carbon(IV) oxide in solid state) is used because of sublimation in nightclubs, fog machines, at theaters, haunted house attractions.

3 0
3 years ago
Read 2 more answers
1. Which type of metal did Rutherford shoot alpha particles into?
DIA [1.3K]
<span>1. Which type of metal did Rutherford shoot alpha particles into?
 C)Gold 

2.When Thomson held a positively charged plate near the cathode ray, the beam bent toward the plate. What conclusion can be drawn from this observation?
 C)The beam was negatively charged.

3.)What was observed during Rutherford's experiment?
D)Most of the particles went through the foil, but some were deflected.</span>
7 0
3 years ago
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