please answer truthfully:))​

Answer:

Platelets are tiny blood cells that help your body form clots to stop bleeding.

Explanation:

If one of your blood vessels gets damaged, it sends out signals to the platelets. The platelets then rush to the site of damage and form a plug (clot) to fix the damage.

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Answer:

Q.1

Given-

Volume of solution-1 L

Molarity of solution -6M

to find gms of AgNO3-?

Molarity = number of moles of solute/volume of solution in litre

number of moles of solute = 6×1= 6moles

one moles of AgNO3 weighs 169.87 g

so mass of 6 moles of AgNO3 = 169.87×6=1019.22

so you need 1019.22 g of AgNO3 to make 1.0 L of a 6.0 M solution

1. the grams of [tex]\rm AgNO_3[/tex] is 1019.22.

2. 10,192.2

Molarity is the measure of the concentration of any solute in per unit volume of the solution.

1. Volume is 1.0 l.

Molarity of solution -6 m

To find the mass of [tex]\rm AgNO_3[/tex]

[tex]\rm Molarity = \dfrac{n}{V}\\\\rm 6 = \dfrac{n}{1}\\\\n = 6 \times 1 = 6[/tex]

Mass of One mole of [tex]\rm AgNO_3[/tex] is 169.87 g

Therefore, the mass of 6 moles will be

169.87 × 6 = 1019.22

2. Molarity of solution 6.0

Volume of solution is 0.1m

The mass of 6 moles will be

169.87 × 6 = 1019.22

[tex]\rm density = \dfrac{mass }{volume} \\\\\rm density = \dfrac{1019.22 }{0.1} = 10,192.2[/tex]

Thus, the options are 1. 1019.22    2. 10,192.2

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Answer: The final temperature of the system will be [tex]13.14^0C[/tex]

Explanation:

[tex]heat_{absorbed}=heat_{released}[/tex]

As we know that,  

[tex]Q=m\times c\times \Delta T=m\times c\times (T_{final}-T_{initial})[/tex]

[tex]m_1\times c_1\times (T_{final}-T_1)=-[m_2\times c_2\times (T_{final}-T_2)][/tex]         .................(1)

where,

q = heat absorbed or released

[tex]m_1[/tex] = mass of steam = 25 g

[tex]m_2[/tex] = mass of water = 0.2384 kg = 238.4 g   (1kg=1000g)

[tex]T_{final}[/tex] = final temperature = ?

[tex]T_1[/tex] = temperature of steam = [tex]116^oC[/tex]

[tex]T_2[/tex] = temperature of water = [tex]8^oC[/tex]

[tex]c_1[/tex] = specific heat of steam = [tex]1.996J/g^0C[/tex]

[tex]c_2[/tex] = specific heat of water= [tex]4.184J/g^0C[/tex]

Now put all the given values in equation (1), we get

[tex]25g\times 1.996J/g^0C\times (T_{final}-116)=-[238.4g\times 4.184J/g^0C\times (T_{final}-8)][/tex]

[tex]T_{final}=13.14^0C[/tex]

Therefore, the final temperature of the system will be [tex]13.14^0C[/tex]

Answer:

Explanation:

Work is a net force applied through a distance in order to displace an object, commonly abbreviated as W. A net force is the sum of all forces acting on an object. Work is mass times acceleration and distance so to find out the work you simply calculate the acceleration of the box being brought in. Next find the distance it was carried to get in the house. Then find out the mass of the box and finally multiply those sums together to get the amount of work put in to bring the package inside.

Answer:

The reaction takes place is

 2 (C2H6) + 7 (O2) → 4(CO2) + 6(H2O) 

According to the equation,

60g ethane requires 7x32= 224g oxygen

here ethane is in excess.oxygen will be consumed completely.

hence

2.9 g O2 will consume 60×2.9/224=0.776g of C2H6

now,

2 moles of C2H6 produces 4 moles of CO2!

60g ethane produces 4x44 g CO2

hence amount of CO2 produced =4×44×0.776/60=2.27g

Answer:

The correct option is option;

A. 1.58 mol

Explanation:

The given balanced chemical reaction is presented as follows;

2Al₂O₃ → 4Al + 3O₂

The given mass of Al produced = 85.5 grams

The given molar mass of Al₂O₃ = 85.962 g/mol

The given molar mass of O₂ = 31.998 g/mol

The given molar mass of Al = 26.982 g/mol

[tex]We \ note \ that \ the \ number \ of \ moles, \ n = \dfrac{Mass }{Molar \ mass}[/tex]

For the given produced Al, n = 85.5 g/(26.982 g/mol) ≈ 3.169 moles

From the given reaction, we have;

2 moles of Al₂O₃ produces 4 moles of Al

∴ 2/4 moles of Al₂O₃ produces 4/4 = 1 mole of Al

2/4 × 3.169 = 1.5845 moles of Al₂O₃ produces 1 × 3.169 = 3.169 moles of Al

∴ 1.5845 ≈ 1.58 moles of Al₂O₃ produces 3.169 moles of Al ≡ 85.5 grams of Al

The correct option is approximately 1.58 moles of Al₂O₃.

Answer:

I think the percent composition of carbon in C6H12O6 is: 25% C 40% C 7% C

Explanation:

Answer:

Organic waste in landfills generates, methane, a potent greenhouse gas. By composting wasted food and other organics, methane emissions are significantly reduced. Compost reduces and in some cases eliminates the need for chemical fertilizers. Compost promotes higher yields of agricultural crops.

Explanation:

Answer:

[tex]T_2=339K[/tex]

Explanation:

Hello there!

In this case, according to the Charles' gas law as way to understand the volume-temperature as a directly proportional relationship for this problem, we can write:

[tex]\frac{T_2}{V_2}=\frac{T_1}{V_1}[/tex]

Thus, given the initial temperature and volume and the final volume, we are able to calculate the final temperature as follows:

[tex]T_2=\frac{T_1V_2}{V_1} \\\\T_2=\frac{252K*5.25L}{3.90L}\\\\T_2=339K[/tex]

Best regards!

Answer:

Protons, electrons

Explanation:

Elements in a groups have the same number of protons and the same electrons.

Answer:

D

Explanation:

i just got it right on edge

Answer:

It is D.

Explanation:

I also got it correct on edge :)

Answer:

It might take 20-30 seconds to dissolve in water

Explanation:

Answer:

86

Explanation:

Answer:

Hope it helps u

Explanation:

FOLLOW MY ACCOUNT PLS PLS

Questions about the kind of charge, the magnitude of charge etc can be asked when the charge on an ion is determined.

An ion is a charged atom or a charged molecule. It attains a charged state because the number of electrons does not remain equal to the number of protons in the atom or the molecule.

The gain of a positive charge by an atom or a negative charge will depend on the fact that whether the number of electrons in an atom is greater than the number of protons or less than the number of protons.

If the atom loses electrons, the total proton number will be higher, so the atom will become positive. If the atom gains electrons, the total electron number will be higher, so the atom will be negative.

The attraction of an atom to another atom happens because it has an unequal number of electrons and protons, then the atom is called an ION. If the atom has more electrons than protons, it is a negative ion or ANION. If it has more protons than electrons, it is a positive ion.

Read more about ions, here

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Answer:

The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Lithium, or 6.941 grams.

Thus, the answer would be 16.24194.

Explanation:

Explanation:

2 moles of lead oxide ->

2PbO2 -> 2PbO + O2

Answer:

I would say B all of these

Answer:

"Electron binding energy, more commonly known as ionization energy, is a measure of the energy required to free an electron from its atomic orbital or from a solid. ... The atomic binding energy of the atom is the energy required to disassemble an atom into free electrons and a nucleus."

Explanation:

Hope this helps! <33

God bless your heart <3333

have a wonderful day!

Binding energy is a required amount of energy that disperses the other particles of the reaction system. It measures the energy needed to free an electron or a subatomic particle.

Binding energy is the ionization energy that depicts how much energy will be needed if an electron has to be removed from an atom for a reaction to occur.

It can be said that the energy required to free an electron from the orbit of the atom is measured in electron volt (eV). It is a little different from ionization energy as binding energy can remove any subatomic particle and not just an electron.

Therefore, the binding energy measures the freed subatomic particle.

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Answer:

Percent composition  by mulecules is:  (mass of element/molecular mass) x 100

Percent composition by atoms is: (mass of element/molecular mass) x 100.

Explanation:

So their the same

Answer:

humans

Explanation:

vertebate chordates include animals , mammals also the fish option is correct

Answer:

those are all physical changes and most physical changes can be undone like crushing a pice of metal you can flatten it back out you anwser is physical change

Explanation:

Answer:

It is a physical change because it can be reversed back and no new subtances is dormed.

Answer:

The average speed should be 6mps (6 meter per second)

Explanation:

90 divided by 15 = 6

Answer:

the answer is 4.9×10-10M

Answer:

the heat wants to travel up. Heat rises

Explanation:

Answer:

1514g of CO₂ reacted

Explanation:

Based on the reaction:

2CO₂ + 43.9kJ → 2CO + O₂

2 moles of carbon dioxide require 43.9kJ of energy to produce 2 moles of carbon monoxide and 1 mole of oxygen

To solve this question, we must convert the 755kJ of energy to moles of carbon dioxide that reacts and to find the mass as follows:

755kJ * (2 moles CO₂ / 43.9kJ)  =34.4 moles of CO₂ are produced

Mass CO₂: Molar mass: 44.01g/mol

34.4 moles CO₂ * (44.01g / mol) =

Answer:

B: 3k+ + 3OH¯ + Fe3+ + 3KOH = Fe3(H) + + 3NO3¯

Explanation:

Potassium hydroxide (KOH) reacts with iron (III).

The normal balanced equation is;

Fe(NO3)3 + 3KOH = Fe(OH)3 + 3KNO3

Now the ionic equation will be;

3k+ + 3OH¯ + Fe3+ + 3KOH = Fe3(H) + + 3NO3¯

Answer:

E) +355 kJ

Explanation:

Based on Hess's law, it is possible to obtain ΔH of a reaction from the sum of similar reactions:

(1) IF(g) + F2(g) → IF3(g) ΔH = -390kJ

(2) IF(g) + 2F2(g) → IF5(g) ΔH = -745kJ

The sum of (1) - (2) is:

IF(g) + F2(g) → IF3(g)

IF5(g) → IF(g) + 2F2(g)

_________________

IF5(g) → IF3(g) + F2(g)

ΔH = -390kJ - (-745kJ)

ΔH = +355kJ

Right answer is:

The answer is II. Oxygen, IV. Sulfur, and V. Selenium.

Explanation:

Going down the list that was provided, we can use the periodic table of elements to determine the valence electrons.

- Nitrogen has 5 valence electrons

- Oxygen has 6 valence electrons

- Fluorine has 7 valence electrons

- Sulfur has 6 valence electrons

- Selenium has 6 valence electrons

Since oxygen, sulfur, and selenium all have 6 valence electrons, then that is the correct answer.

I hope this helps you!

Explanation:

M

r

N

H

3

=

17

;

M

r

O

2

=

32

;

M

r

N

O

=

26

;

M

r

H

2

O

=

18

Using the equation:

Number of Moles = Mass / Mr

Number of Moles

N

H

3

=

175

17

=

10.3

Number of Moles

O

2

=

310

32

=

9.69

O

2

is the limiting reagent because the least moles of this are used in the reaction.

From the balanced equation, we can see that

O

2

and

N

O

are in a 5:4 ratio

5

4

=

0.8

9.69

×

0.8

=

7.75

7.75 moles of

N

O

is the maximum that can be produced from 310g of

O

2

. To convert this to mass we use the same equation as in the first step.

Mass = Moles x Mr

7.75

×

26

=

202

g

202g is the theoretical yield of

N

O

To calculate the percentage yield, you just divide the actual yield by the theoretical yield and multiply by 100:

197

202

×

100

=

98

%

The limiting reactant for the reaction between 10 moles of NH₃ and 30 moles of NO is NH₃.

The balanced equation for the reaction is given below:

4NH₃ + 6NO → 5N₂ + 6H₂O

From the balanced equation above,

4 moles of NH₃ reacted with 6 moles of NO.

With the above information, we can obtain the limiting reactant as follow:

From the balanced equation above,

4 moles of NH₃ reacted with 6 moles of NO.

Therefore,

10 moles of NH₃ will react with = [tex]\frac{10 * 6}{4}\\\\[/tex] = 15 moles of NO.

From the calculation made above, we can see clearly that only 15 moles of NO out of 30 moles reacted completely with 10 moles of NH₃.

Therefore, NH₃ is the limiting reactant and NO is the excess reactant.

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Answer:

0.092M

Explanation:

Molarity of glucose solution = number of moles ÷ volume

According to this question, 12.5g of glucose (C6H12O6) is dissolved in enough water to make 750mL of solution.

Molar mass of glucose (C6H12O6) = 12(6) + 1(12) + 16(6)

= 72 + 12 + 96

= 180g/mol

mole = mass/molar mass

mole = 12.5/180

mole = 0.069mol

Volume of solution = 750mL = 750/1000 = 0.750L

Hence, molarity = n/V

Molarity = 0.069 ÷ 0.750

Molarity = 0.092M