If 500.0 mL of 0.450 M sodium phosphate is reacted with an excess of iron (II) nitrate solution, how many grams of iron (II) phosphate are produced?

Answer: $6.653×10^15

Explanation:

Volume of sea water sample = 1.8mL

Mass of gold in sample = 4.0 × 10^-10 g

Total volume of ocean water = 1.5 × 10^21 L

Converting volume of seawater sample into liters :

1.8mL = (1.8/1000)L = 0.0018L = 1.8×10^-3

If volume of gold in ;

1.8×10^-3L = 4 × 10^-10 g

1.5×10^21 L = X

(1.8×10^-3L)X = [(1.5×10^21) × (4×10^-10) ]

X = [1.5×4(10^21-10)] / 1.8×10^-3

X = 6.0(10^11) / 1.8×10^-3

X = 3.333×(10^11+3)

X = 3.333 × 10^14

Cost of world's gold equals

(3.333 × 10^14) × $19.96

$66.53 × 10^14

Answer:

b. blinking of eyes

Explanation:

Answer:

The answer is B

Explanation:

Blinking is involuntary but also can be done voluntarily.

Red Litmus paper turns blue

Answer:

[tex] Ca(OH) _2 [/tex]

Explanation:

In lime water [tex] \red{\bold {RED}} [/tex] litmus paper turns [tex] \blue {\bold {BLUE}} [/tex] because lime water is alkaline.

[tex]formula \: for \: lime \: water : Ca(OH) _2 \\ [/tex]

Answer:

Guessing its unsaturated.

Explanation:

A fully saturated compound contains no double or triple bonds. Alternatively, if a molecule contains double or triple bonds, it is considered to be unsaturated.

Answer:

The molarity is 0.4 [tex]\frac{moles}{liter}[/tex]

Explanation:

The Molarity (M) or Molar Concentration is a concentration unit that indicates the number of moles of the solute per liter of solution. In other words, molarity is defined as the number of moles of solute that are dissolved in a given volume.

The Molarity of a solution is determined by the expression:

[tex]Molarity (M)=\frac{number of moles of solute}{volume}[/tex]

Molarity is expressed in units ([tex]\frac{moles}{liter}[/tex]).

In this case:

Replacing:

[tex]Molarity (M)=\frac{0.2 moles}{0.5 L}[/tex]

Molarity= 0.4 [tex]\frac{moles}{liter}[/tex]

The molarity is 0.4 [tex]\frac{moles}{liter}[/tex]

Answer:

125

Explanation:

A molecule of sucrose (C12H22O11) has 12 carbon atoms, 22 hydrogen

Answer:

3) 2,2-dichloroheptane

Explanation:

2,2-dichloroheptane

Answer:

[tex]C_A=0.144M[/tex]

Explanation:

Hello,

In this case, given the rate constant, we infer this is about a second order reaction, whose equation is:

[tex]\frac{dC_A}{dt}=kC_A^2[/tex]

Thus, by integration we obtain:

[tex]\frac{1}{C_A}= \frac{1}{C_A_0}+kt[/tex]

Hence, we solve for the final concentration after 0.385 s:

[tex]\frac{1}{C_A}= \frac{1}{0.155M}+\frac{1.308}{Ms} *0.385s=\frac{6.955}{M}\\ \\C_A=\frac{M}{6.955} \\\\C_A=0.144M[/tex]

Best regards.

Answer: the first one is work and the second one is energy

Explanation:

Answer:

first :work second:energy

Explanation:

The Answer For Your Question is:

A) F

Answer:

0.85 mole of PBr3.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is given below:

3Br2 + 2P —> 2PBr3

From the balanced equation above,

3 moles of Br2 reacted to produce 2 moles of PBr3.

Therefore, 1.27 moles of Br2 will react to produce = (1.27 x 2)/ 3 = 0.85 mole of PBr3.

Therefore, 0.85 mole of PBr3 is produced by the reaction.

Answer:

friction

Explanation:

Answer:

375.3KJ

Explanation:

The following data were obtained from the question:

Mass of water = 166g

Heat of Vaporisation (ΔHv) = 40.7kJ/mol

Heat (Q) =..?

Next, we shall determine the number of mole in 166g of water. This is illustrated below:

Mass of H2O = 166g

Molar mass of H2O = (2x1) + 16 = 18g/mol

Number of mole = Mass/Molar Mass

Number of mole of H2O = 166/18

Number of mole of H2O = 9.22 moles.

Now, we can obtain the heat required to vaporise the water as shown below:

Q = n·ΔHv

Q = 9.22 mol x 40.7kJ/mol

Q = 375.3KJ

Therefore, the heat required to vaporise the water is 375.3KJ.

Answer:

Explanation:

The arrow symbol in a chemical equation separates the reactants from products. A chemical reaction is process in which chemical changes leads to the formation of products from reactants.

Answer: b

Explanation: its b

Answer:

250L

Explanation:

Data;

V1 = 200L

P1 = 10atm

T1 = 400K

T2 = 100K

P2 = 2atm

V2 = ?

To solve this question, we'll have to use the combined gas equation which is a combination of Boyle's law, Charles law and pressure law.

From combined gas equation,

(P1 × V1) / T1 = (P2 × V2) / T2

P1 × V1 × T2 = P2 × V2 × T1

Solve for V2,

V2 = (P1 × V1 × T2) / P2 × T1

V2 = (10 × 200 × 100) / (2 × 400)

V2 = 200,000 / 800

V2 = 250L

The final volume of the gas is 250L

Answer:

0.00025 mole

Explanation:

The number of moles of a substance can be mathematically derived from the following formula

1. mass of substance (in grams)/molar mass of substance (in grams/mole)

2. molarity of substance (in mol/dm3) x volume of substance (in dm3)

In this case, the molarity and volume of NaOH are provided, hence, the second formula will be applicable.

2.5 mL of NaOH was used = 0.0025 dm3

Number of mole of NaOH that was used to neutralize the river water:

  = 0.1 x 0.0025 = 0.00025 mole

The number of mole of NaOH used to neutralize the river water is 0.00025 mole.

Answer:

A) one year

Explanation:

One complete revolution takes 365.25 days, or one year.

Answer:

1 year

Explanation:

Answer:

0.1

Explanation:

We must first put down the equation of the reaction in order to guide our solution of the question.

2HNO3(aq) + Sr(OH)2(aq) -------> Sr(NO3)2(aq) + 2H2O(l)

Now from the question, the following were given;

Concentration of acid CA= ??????

Concentration of base CB= 0.299M

Volume of acid VA= 17.8ml

Volume of base VB= 24.7ml

Number of moles of acid NA= 2

Number of moles of base NB= 1

From;

CAVA/CBVB= NA/NB

CAVANB= CBVBNA

CA= CBVBNA/VANB

SUBSTITUTING VALUES;

CA= 0.299 × 24.7 ×2 / 17.8×1

CA= 0.8298 M

But;

pH= -log[H^+]

[H^+] = 0.8298 M

pH= -log[0.8298 M]

pH= 0.1

Answer:

what is the quetion.......

Explanation:

Answer:

Increase in temperature will not affect a solid - liquid mixture. Example can be taken of salt and water

Answer:

Geological processes can change over time. Water erosion can move sand and dirt and anything. Minerals are everywhere, but they can be buried or washed away by all the geological processes that happen every day.

Explanation:

Answer:

10 400 N

Explanation:

A drag force is an oppositional or limiting force which must be overcome before an object must move wit a force. The lesser the drag force, the higher the probability that an object would move easily.

From the question give, the resultant force of the was is 600 N and force from the engine - 11 000 N.

Drag force = 11 000 - 600

                 = 10 400 N

The drag force on the car is 10 400 N.

This shows that the car would not move since the drag force (10 400 N) is far greater than the resultant force(600 N).

Answer:

append()

Explanation:

just took this test, chose this answer, and got it correct

Answer:

d

Explanation:

I guess it is a small world cuz i doing the test on flvs to

hope this helps

Answer:

inertia is the tendency of an object to resist a change

Answer:

Activation energy is the energy that's provided to a chemical or nuclear system, whichever one, with reactants to get a result of a chemical reaction or a nuclear, or many other reactions. Well that's what I know, I tried(:

Explanation

Well that's what I know, I tried(:

Answer:

1.35 M

Explanation:

grams/molar mass=ans./volume(L)

100/164=ans./.450

Answer:

Hydrogen ion.

Explanation:

Hydrogen ion is present in the acids which indicates if they are safe for eating or not. The weak acid is present in citrus so it is safe to eat. Weak acid means the concentration of hydrogen ion is lower. If this concentration exceeds so the food is not safe to eat or drink. The pH of acid more than 5 is good to eat but below 5 can adversely affect our body if we consume it.

Answer:

candles

Explanation:

if u burn these fruits, it is obvious that there will be ashes but the key hint here is

" retaining the smell"

and what are things that smell and can be fruit scented?

a..... CANDLE

hope this helped :D

Answer:

BY BURNING A CANDLE WITH ITS SCENT

Explanation:

Answer:

The reaction will proceed in the reverse direction

Explanation:

Now consider the equation;

CaCO3(s) ⇄CO2(g) + CaO(s)

This is a reversible reaction. The reaction could proceed in either the forward or the reverse reaction depending on the conditions of the reaction. Under certain conditions, the forward reaction is favoured, under certain conditions, the reverse reaction is favoured.

The direction in which the reaction proceeds depends on the desired products as the equilibrium position could be manipulated at will by altering the reaction conditions. If the desire is to produce more CaCO3, then the equilibrium position is manipulated so that it shifts towards the left hand side. This implies that the reverse reaction is favoured.