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4 years ago

5

ICMP scanning involves in checking for the live systems, which can be done by sending the following ping scan request to a host.

If the host is live, then it will return a reply.

1 answer:

abruzzese [7]4 years ago

5 0

Answer:

ICMP Echo Request

Explanation:

ICMP Echo Request is a form of probe or message sent by a user to a destination system.

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Erbium metal (Er) can be prepared by reacting erbium(III) fluoride with magnesium; the other product is magnesium fluoride. Writ

Nesterboy [21]

Answer:

2ErF3 +3Mg = 3MgF2 + 2Er

Explanation:

This is a single replacement equation where there are 2 metals. The bonds are broken and new bonds are formed again by Mg and F.

Er has a +3 charge and F has a -1 charge. You switch it around and you get ErF3. Then you add the second reactant, Mg. The product is MgF as stated, and Mg has a charge of +2 and F has -1. You switch it again and you get MgF2. Then the second product Er is there.

Now we have

ErF3+Mg=MgF2+Er

So we balance the equation because of the law of conservation of mass.

Make F equal, so we add the coefficents 2 and 3

2ErF3+Mg=3MgF2+Er

And now Mg and Er need balancing so

2ErF3+3Mg=3MgF2+2Er

Hope this helped

8 0

4 years ago

Dissolving 4.02 g of CaCl2 in enough water to make 349 mL of solution causes the temperature of the solution to increase by 3.91

gregori [183]

Answer:

ΔH per mole of CaCl2 is 160.3 kJ

Explanation:

<u>Step 1: </u>The balanced equation

CaCl2 (aq)→ Ca2+ + 2Cl-(aq)

<u>Step 2:</u> Data given

Molar mass of CaCl2 =110.98 g/mole

mass of CaCl2 = 4.02 grams

volume of the solution = 349 mL = 0.349 L

Temperature increases with 3.91 °C

Specific heat of the solution = specific hea of water = 4.18 J/°C*g

Density solution = density water = 1g/cm³

<u>Step 3:</u> Calculate moles of CaCl2

Numer of moles of CaCl2 = mass of CaCl2 / Molar mass of CaCl2

Number of moles = 4.02 grams /110.98 g/mole= 0.036 moles

<u>Step 4</u> = Calculate amount of heat added

Q = m*c*ΔT

with m = the mass 349 grams + 4.02 grams = 353.02 grams

c = 4.18 J/°C*g

ΔT = 3.91 °C

Q = 353.02*4.18*3.91 = 5769.69 J

Step 5: Calculate ΔH per mole

5769.69 J /0.036 moles = 160269.1 J = 160.3 kJ

ΔH per mole of CaCl2 is 160.3 kJ

6 0

3 years ago

Choose a starting point in the water cycle and describe the process you would go through to move through the entire cycle.

Bogdan [553]

The water cycle describes how water evaporates from the surface of the earth, rises into the atmosphere, cools and condenses into rain or snow in clouds, and falls again to the surface as precipitation. ... The cycling of water in and out of the atmosphere is a significant aspect of the weather patterns on Earth.

4 0

3 years ago

What cells in living organisms are diploid

Pavlova-9 [17]

Question

<em>what cells in living organisms are diploid?</em>

Answer:

<em>Most mammals are diploid organisms, which means they have two homologous copies of each chromosome in the cells. In humans, there are 46 chromosomes. In most diploid organisms, every cell except for gametes will be diploid and contain both sets of chromosomes.</em>

Hope this helps!

5 0

4 years ago

In a balanced equation, coefficients always represent

steposvetlana [31]

Answer:

D. The number of atoms present

Explanation:

In a balanced equation, coefficients always represent the number of atoms present.

8 0

3 years ago