Chemistry High School

You have a stock solution of HNO3 with a concentration of 4.5 x 10^-4 M. However, you need 275 ml of a 2.50 x 10^-5 M solution. How much of the stock solution will you need?

Answers

Answer 1

Answer:

15.28 mL

Explanation:

From the question given above, the following data were obtained:

Molarity of stock solution (M₁) = 4.5x10¯⁴ M

Volume of diluted solution (V₂) = 275 mL

Molarity of diluted solution (M₂) = 2.5×10¯⁵ M

Volume of stock solution (V₁) needed =.?

The volume of the stock solution needed can be obtained by using the dilution formula as illustrated below:

M₁V₁ = M₂V₂

4.5x10¯⁴ × V₁ = 2.5×10¯⁵ × 275

4.5x10¯⁴ × V₁ = 0.006875

Divide both side by 4.5x10¯⁴

V₁ = 0.006875 / 4.5x10¯⁴

V₁ = 15.28 mL

Therefore, the volume of the stock solution needed is 15.28 mL

Related Questions

Give two limitations of law of Constant Composition

Answers

Answer:

1.The law does not hold true if the different isotopes of the element are involved in making chemical compound.

2.The law is not applicable when elements combine in the same ratio but different compounds are formed.

Someone please answer this...

Answers

Answer:

5446.8 J

Explanation:

From the question given above, the following data were obtained:

Mass (M) = 50 g

Initial temperature (T₁) = 70 °C

Final temperature (T₂) = 192.4 °C

Specific heat capacity (C) = 0.89 J/gºC

Heat (Q) required =?

Next, we shall determine the change in the temperature. This can be obtained as follow:

Initial temperature (T₁) = 70 °C

Final temperature (T₂) = 192.4 °C

Change in temperature (ΔT) =?

ΔT = T₂ – T₁

ΔT = 192.4 – 70

ΔT = 122.4 °C

Finally, we shall determine the heat required to heat up the block of aluminum as follow:

Mass (M) = 50 g

Specific heat capacity (C) = 0.89 J/gºC

Change in temperature (ΔT) = 122.4 °C

Heat (Q) required =?

Q = MCΔT

Q = 50 × 0.89 × 122.4

Q = 5446.8 J

Thus, the heat required to heat up the block of aluminum is 5446.8 J

The photo shows wires made of pure copper, an element
What would the smallest piece of copper be?
A. Copper atom
B. Mixture of different kinds of metallic elements
C. Copper molecule
D. Compound containing two or more elements

Answers

Answer:

Explanation:

I hope its right. I'm pretty sure.

Answer:

Explanation:

Copper Atom

what water has 97% of water

Answers

Answer:

ocean

Explanation:

because its easy

The answer would be Ocean

A student is drinking a cup of hot chocolate as they sit by a campfire on a chilly evening. They know that the cup of hot chocolate transfers thermal energy to the surrounding air. The heated air over their cup of hot chocolate expands and rises and is replaced by cooler, denser air.
This method of energy transfer is —

Answers

Answer:

This method of energy transfer is

Explanation:

Answer:

radiation

Explanation:

radiation is when an existing heat source spreads heat to its surroundings

Other Questions

Which of the following elements has the strongest attraction for the electrons in a bond?(A.) hydrogen(B.) lithium(C.) bromine(D.) astatine When 80 is decreased by 15%, the new number is How can I tell that a graph is a function or not? how much should dave charge for donuts? These are the weekly wages paid to staff in a hotel.245140525163195174140What is the median wage? which situation gives an example of intrinsic motivation?A student writes an essay to win a free trip.A student writes an essay to explain his feelings.A student writes an essay to get a scholarship.A student writes an essay to receive prize money. HEELLPPP!!!!! fastttt plzzzzz!The sales for products sold at an electronic store are below. What percent of the products sold were speakers? STOP RIGHT THERE. Please help me. plzs help What is pictured? Would you consider it art? Why or why not? How many total beats are these tied notes worth, assuming a quarter note equals 1 beat? A. OneB. FiveC. Three WILL GIVE BRANILYWhat type of evidence should a writer look for when researching for an essay?evidence from opinionated sourcesevidence from unidentified sourcesevidence from sources that are free of biasevidence from sources that present a single point of view The amount of interpersonal space (space between people while interacting) that is acceptable varies by culture. This activity is important because interpersonal space is one of the key cultural areas to understand in business if you want to bridge cross-cultural gaps. The goal of this exercise is to test your knowledge of the cultural area of interpersonal space.Determine which of the following countries has Least Social Distance and Most Social Distance.a. Chinab. UKc. Saudia Arabiad. Indiae. USA Which of the following would be considered an exercise program? abasketball bfootball caqua dynamics dsoccer What number is 40% of 160?Try to explain The numbers 12, 7, 2, 3, . . . follow a pattern. What are the next three numbers in this pattern? A. 8, 13, 18 B. 5, 10, 15 C. 2, 8, 13 D. 8, 14, 17 IA 10 kg box is pulled across the floor at a constant speed. If the force of pull was 70 N ata 30 angle:a. What was the force of frictionb. What was the coefficient of friction Many installations have since been transformed and serve as ___ today. What allowed homosapiens to migrate further than earlier people? A cone has a diameter labeled twelve centimeters and a height labeled thirty-two centimeters. Find the area of a vertical cross section through the center of the base of the cone. A game has purple and orange pieces. The ratio of purple game pieces to total pieces is 7:16. Select all the statements about the game pieces that are correct.A. The ratio of purple pieces to orange pieces is 9:7.B. The ratio of total pieces to orange pieces is 16:9.C. The ratio of total pieces to purple pieces is 16:9.D. There must be 9 more orange pieces than purple pieces.