# Posts by Linzy

Total # Posts: 27

**Technology **

Which of the following is covered by copyright A.Music B. Books*** C. Website content D. All of the above

**Chemistry**

Not when I do not have a book that is cooperating with me. I have an online course and my book keeps freezing so I am unable to look anything up to make sure I am doing these equations and formulas right.

**Chemistry**

You have a stock solution of 5.0 M H2SO4. How many mL of stock solution are required to make 136 mL of 1.6 M H2SO4 solution

**Chemistry**

What volume(ml) of 8.0 M solution is required to make 134.3 ml of 1.2 M solution

**Chemistry**

A 2.5% KCl solution is prepared by dissolving enough of the salt to give 181.4 g of solution. What mass (g) of water is required?

**Chemistry**

What is the molarity of a sucrose solution that contains 76.7 g of C12H22O11 (342.34 g/mol) dissolved in 138.2 mL of solution

**Chemistry**

What is the molarity of a saline solution that contains 3.6 g NaCl (58.44 g/mol) dissolved in 100.0 mL of solution?

**Chemistry**

What is the mass (g) of nickel(II) nitrate (182.71 g/mol) dissolved in 160.4 mL of 0.100 M Ni(NO3)2 solution?

**Chemistry**

How many grams of Na2CO3 can be found in a 273 mL sample of 0.5 M solution

**Chemistry**

A hospital glucose solution is analyzed to verify its concentration. A 10.0 mL sample with a mass of 10.886 is evaporated to dryness. If the solid glucose residue has a mass of 0.648, what is the m/m% concentration?

**Chemistry**

2Mg + O2 ¨ 2MgO How many grams of MgO are produced when 79.5 grams of O2 react completely with Mg according to this equation?

**Chemistry**

What mass(g) of hydrogen gas is produced by decomposing 179.1 g of water. Round your answer to one decimal place. 2 H2O(s) --> 2 H2(g) + O2 (g)

**Chemistry**

What mass (g) of water is produced by the combustion of 48.8 g of propane according to the following reaction? Round your answer to one decimal place. C3H8(g) + 5 O2(g) --> 3 CO2(g) + 4 H2O (l)

**Chemistry**

What mass (g) of magnesium chloride (MgCl2) must react with sulfuric acid (H2SO4) to release 890.2 ml of Hydrogen chloride (HCl) gas at STP according to the following equation? Round to one decimal place. MgCl2 (s) + H2SO4 --> MgSO4 (aq) + 2 HCl

**math please help**

10 inches divded by 31 equals 0.3225 inches per day. I am sure you can round this to the nearest hundreth.

**Pre-Algebra**

No problem

**Pre-Algebra**

B is right

**Chemistry**

Your space ship has docked at a space station above Mars. The temperature inside the space station is a carefully controlled 24oC at a pressure of 689 mm Hg. A balloon with a volume of 426 ml drifts into the airlock where the temperature is -88oC and the pressure is 0.160 atm...

**math**

-2x+9x-4 = 7x-4

**Chemistry**

A balloon from the local toy store has a volume of 6.6 liters and an internal pressure of 2.4 atmospheres at 22°C. How many moles of gas does it contain?

**Chemistry**

A sample of gas has a volume of 8.1 liters at 1 atmosphere pressure and 203.0 K. What is its volume (liters) at STP?

**Chemistry**

A sample of gas with a volume of 14.9 liters at 2.6 atmospheres pressure and a temperature of 25°C is allowed to expand to a volume of 29.3 liters at a temperature of 15°C. What is the final pressure (atm)atof the gas?

**Chemistry**

A small cylinder of compressed gas has a volume of 396.6 ml and contains 47.9 g of CO2 at 25°C. What is the pressure (atm) inside the cylinder?

**Chemistry**

A 3.0 L volume of methane gas is cooled from 59.4°C to 30.0°C. If the pressure remains constant, what is the final volume (L)?

**Chemistry**

If a gas has a pressure of 3.0 atm at 12.8°C, what is its pressure (atm) at 25.9°C?

**Chemistry**

If a sample of gas occupies 2.1 ml at a pressure of 896 torr, what volume (ml) will it occupy at a pressure of 316.8 torr. I really need an answer, but also please show me how to work this problem.

**Physical Science**

Explain Why charged particles do not penetrate matter deeply