10/16/20

#### Balanced equations

B. Write a balanced equation for the double-replacement precipitation reaction described, using the smallest possible integer coefficients.A precipitate forms when aqueous solutions of copper(II)... more

10/10/20

#### Is work (w) being done on the gas or by the gas in the cylinder? Will the sign of work be >0 or <0?

Consider a gas enclosed in a cylinder with a piston. If the gas is compressed by lowering the piston, is work (w) being done on the gas or by the gas in the cylinder? Will the sign of work be >0... more

10/10/20

#### Which of the following has a negative value of ΔH?

Which of the following has a negative value of ΔH?a. The melting of snowb. The evaporation of ethanolc. The combustion of gasolined. The dissolution of ammonium nitrate in a cold pack

#### Write an equation or system of equations and then use those equations to answer the question.

Angela is responsible for for buying a week's supply of food and medication for the dogs and cats at a local shelter. The food and medication for each dog cost twice as much as those supplies for a... more

09/02/16

#### PLEASE HELP ME! I AM STUCK on 3 BIOLOGY multiple choice questions.

In general, colder temperatures reduce the fluidity of the membrane, so cells will produce different molecules to maintain the proper degree of fluidity. How would the membrane change in response... more

03/22/16

#### If 0.528 mole of Al2S3 react with 3.70 mole HCl, how mant grams of H2S are formed

If 0.528 mole of Al2S3 react with 3.70 mole HCl, how mant grams of H2S are formed

02/18/16

#### the sum of 2 numbers is 24. Their difference is 15. what are the two numbers

The sum of two numbers is 24. Their difference is 15. What are the two numbers.

02/18/16

#### The larger of two numbers is8less than three times the smaller number. The sum of the two numbers is 48. Find the numbers.

The larger of two numbers is8less than three times the smaller number. The sum of the two numbers is 48. Find the numbers.

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