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A gas sample collected at 35.0 degrees Celsius and a pressure of 710 torr has a volume of 200 ml. The temperature and pressure are changed and the gas is compressed to 150 ml. The new temperature is 40.0 degrees Celsius; what is the new pressure?

a student collected a a 40.0 mL sample of H2 gas at a temperature of 20.0 Celsius and pressure of 720.0 mmHg. The next day the temperature was still 20.0 Celsius but the samples volume had decreased to 38.4 mL. What is the new pressure, in mmHg?

Exlain why non luminous flame is used for heating purposes.

A sample of gas in a balloon has an initial temperature of 3degrees celsius and a volume of 1740 L. If the temperature changes to 88 degrees celsius , and there is no change of pressure or amount of gas, what is the new volume, V2, of the gas?

A sample of gas in a balloon has an initial temperature of 35degree celsius and a volume of 1120 L. If the temperature changesto 74 degree celsius, and there is no change of pressure or amountof gas, what is the new volume,V2, of the gas?

a simple gas in a balloon has an initial temperature of 37 Celsius in a volume of 14/8 liters. If the temperature changes to 94 Celsius and there is no change of pressure on my uh gas, what is the new volume, V2 of the gas?

A 49.1 mL sample of gas is collected at 20.0 Celsius and 732.5 mmHg pressure.what is the volume of the gas if the pressure is change to 760.0mmHg and temperature of 32 Celsius?

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a chemist measures the amount of hydrogen gas produced during an experiment. she finds that of 368 g of hydrogen gas is produced. calculate the number of moles of hydrogen gas produced.

A chemist measures the amount of fluorine gas produced during an experiment. He finds that 556. g of fluorine gas is produced. Calculate the number of moles of fluorine gas produced.

Round your answer to 3  significant digits.

A chemist carefully measures the amount of heat needed to raise the temperature of a 1.21 kg sample of a pure substance from 34.3°C to 47.6°C. The experiment shows that 75.6 kJ of heat are needed. What can the chemist report for the specific heat capacity of the substance? Round your answer to 3 significant digits.

The rate of a certain reaction is given by the following rate law:

rate=k[H2][I2]

The rate of the reaction is measured to be 9.0 x 103 M / s when [H2] = 1.7 M and [I2] = 1.9 M. Calculate the value of the rate constant.

Round your answer to 2 significant digits.

A balloon of gas has a pressure of 1.72 atm, temperature of 35 oC and volume of 2.9 L. If the temperature decreases to 18 oC and the pressure increase to 3.51 atm, what is the new volume in L?

Universal hashing is a technique used in computer science and cryptography to design hash functions that minimize collisions and provide good average-case performance. The idea is to randomly select a hash function from a family of hash functions, ensuring that the probability of collisions is low for any given input set. Here's an overview of how universal hashing works:

1. Hash Function Family: Define a family of hash functions, denoted as H, that can be used to hash the keys. Each hash function in this family maps keys to hash values.

2. Random Selection: When you want to hash a key, you randomly select a hash function from the family H. This random selection introduces an element of randomness that helps distribute the keys more uniformly.

3. Collision Probability: The key to the effectiveness of universal hashing is to ensure that the probability of collisions (i.e., two different keys hashing to the same value) is low for any input set of keys. This is achieved by carefully designing the hash function family.

4. Analysis: Universal hashing relies on probabilistic analysis to demonstrate that the chosen hash function family provides good average-case performance in terms of minimizing collisions.

To solve or implement universal hashing, you need to perform the following steps:

Step 1: Define Hash Function Family Choose a prime number p and define a hash function family H. For each a and b where a is in the range [1, p-1] and b is in the range [0, p-1], define a hash function h_{a,b}(k) as:

Where:

• k is the input key.
• p is a prime number that determines the range of the hash function.
• m is the number of slots or buckets in the hash table.

Step 2: Random Selection For each key you want to hash, randomly choose a and b from the allowed ranges. This random selection is typically done using a truly random source or a pseudorandom number generator.

Step 3: Hashing Given a key k, and the selected a and b, calculate the hash value using the formula mentioned earlier.

Step 4: Collision Analysis To analyze the collision probability, you can use techniques from probability theory and number theory. The goal is to show that for any distinct keys k1 and k2, the probability that h_{a,b}(k1) = h_{a,b}(k2) is small, ideally close to 1/m (where m is the number of buckets).

Step 5: Usage Use the selected hash function to hash keys in your hash table. Remember to re-randomize the a and b values whenever you rehash or resize the hash table.

It's important to note that implementing universal hashing requires a good understanding of number theory, probability, and hash functions. The effectiveness of the technique relies on the careful choice of parameters and the quality of the hash function family H. Universal hashing is often used in situations where security and performance are both important, such as in cryptographic applications or hash-based data structures.

A chemist determines by measurements that 0.045 moles of iodine solid participate in a chemical reaction. Calculate the mass of iodine solid that participates.

Round your answer to 2 significant digits.

Dinitrogen pentoxide gas (N2O5) is obtained by the reaction of nitrogen trioxide gas (NO3) and nitrogen dioxide gas (NO2).

Write a balanced chemical equation for this reaction.

A chemist carefully measures the amount of heat needed to raise the temperature of a 199.0 g sample of a pure substance from 22.3°C to 32.8°C. The experiment shows that 3.87 kJ of heat are needed. What can the chemist report for the specific heat capacity of the substance?

Round your answer to 3 significant digits.

The following chemical reaction takes place in aqueous solution:

2AgNO3(aq)+Na2CO3(aq)→Ag2CO3(s)+2NaNO3(aq)

Compare the pH of the milk sample and the pH at which casein solid forms

What is a peptide bond

bromoethane react with ch3ch20na

What is copper

4.94 Write the balanced chemical equation for the combustion of ethane, C2H6, and answer these questions. (a) How 
many molecules of oxygen would combine with 14 molecules of ethane in this reaction? (b) If 13.0 mol of oxygen 
is consumed in a reaction, how many moles of water are 
produced? (c) How many grams of ethane are burned if 
4.20 × 1022 molecules of CO2 are produced?

Write a balanced chemical equation for this reaction.

Osteomalacia occurs due to the deficiency of 

A chemist prepares a solution of silver (I) pre-chlorate(AgCIO4) by measuring out 4.2×10^2 umol of silver pre-chlorate into a 350 mL volume metric flask and filling the flask to the mark with water. Calculate the concentration and umol /liters of the chemists silver plate chlorate solution, be sure your answer has the correct number of significant digits 

How many moles are present in 10g of Na2SO4

When the following equation is balanced properly under acidic conditions, what are the coefficients of the species shown?

HAsO2 + Cr3+H3AsO4 + Cr

Water appears in the balanced equation as a fill in the blank 5 (reactant, product, neither) with a coefficient of . (Enter 0 for neither.)

How many electrons are transferred in this reaction?