kellie

This page lists questions and answers that were posted by visitors named kellie.

Questions

The following questions were asked by visitors named kellie.

what is the effect of this the maine exploded in a cuban hoarbor

When 25.0 g of Zn reacts, how many L of H2 gas are formed at 25 °C and a pressure of 854 mmHg?

a. How many atoms of hydrogen are in 25.0 g of ammonia (NH3)? Use the format 6.02E+23 for 6.02 x 1023 b. How many atoms of nitrogen are in the same amount of ammonia?

15 years ago

2C2H6(g) + 7O2(g) > 4CO2(g) + 6H2O(g) KCl(s) > K(s) + Cl2(g) is this balanced?

15 years ago

Solid magnesium metal reacts with chlorine gas according to the following equation: Mg + Cl2 --> MgCl2 What mass of magnesium chloride is formed in the reaction between 7 g of Mg and 13.2 g of Cl2 is this correct 7 g+13.2 g = 20.2 grams ?

15 years ago

what type of reaction is this Li + H2O --> LiOH A. Combination B. Combustion C. Decomposition Im thinking combination but the H2 is confusing me

15 years ago

a. How many atoms of hydrogen are in 25.0 g of ammonia (NH3)? Use the format 6.02E+23 for 6.02 x 10^23 b. How many atoms of nitrogen are in the same amount of ammonia I know to find the number of atoms in a gram of a sample you must multiply by 6.02*10^23...

15 years ago

i need to write about what my future partner will be like i need to use future tense and negative tense any help id appreciate thankyou! :}

15 years ago

A volume of 0.285 L of a gas at STP weighs 0.537 g. Calculate the molar mass of the gas.

15 years ago

At what temperature (oC) will a gas sample occupy 6.1 L if it originally occupies 17.8 L at 27.1oC?

15 years ago

A 16.5 cm3 bubble under the ocean at 2.1 atm and 12.5oC surfaces to 1.0 atm and 22.1oC. What is the new volume (in cm3)?

15 years ago

Determine the density of methane (CH4) in g/L at 24.7oC and 1.1 atm ideal gas eqn: P = (rho)RT, where: pressure: P = 1.1 atm specific gas constant: R, R = |R / M, where |R = 0.0821 L-atm / K-mol and, molecular weightCH4: M = 0.016 kg/mol R = 0.0821/0.016...

15 years ago

please could someone help me answer this question why relations between britain and germany changed in the years 1936-1939? was it because britain didn't want to get involved with germany because they didn't want another war to start? im not sure what to...

15 years ago

please could i say a huge thankyou you have helped me alot and i appreciate it thankyou again you are a star! :]

15 years ago

A balloon is filled with 2.3 cm3 helium gas at 112.1 atm pressure. What will be the new pressure (atm) if the volume is changed to 44.7 cm3? P1V1=P2V2 (112.1)(.0023)=(P2)(.0447) the answer i got was 54.85 so would the answer be 54.85 atm?

15 years ago

At what temperature (oC) will a gas sample occupy 6.1 L if it originally occupies 17.8 L at 27.1oC? I did (v1/t1)=(v2)/(t2) v1=17.8 v2=6.1 t1=27.1 C = 300.25 K the answer i got for t2= 102.894 K which would be -170.106 C This doesnt seem right is it?

15 years ago

Calculate the change in internal energy for a system that absorbs 242 J of heat and does 193 J of work on the surroundings...

14 years ago

A ship leaves port and heads due east at a rate of 32 miles per hour. Ever since the ship left port, it has been pushed south by a strong constant wind. Five hours after leaving port, the ship is 200 miles away. What is the effective push on the ship from...

14 years ago

how do you find ...weekly sales in thousands of items of a product has a seasonal sales record approximated by y=18.1sin(piex/24)+52.9 where x is time in weeks and 1 is the first week in janurary. during which weeks will the sales equal 61,950 items this...

14 years ago

windows of time during which enviorment influences on development are enhanced are called blank periods? a.sensitive b. critical c. crucial d. necessary i say c?

14 years ago

what is (x to the 3rd power + x to the 2nd power) divided by ((x+4)(X-4)) multiplied by (x+4) divided by (3x to the 4th power + x to the 3rd power + 2x to the 2nd power)

14 years ago

Find the resultant force on (a) the mass m1 = 0.183 kg and (b) the mass m2 = 0.106 kg (the masses are isolated from the earth).. The first mass is 400kg and its 10 cm from the second mass which is 0.183 kg (m1). the second mass is 10 cm away from the thir...

14 years ago

Compute the orbital radius of an earth satellite that has an equatorial orbit and always remains above a fixed point P on the earth's surface. Communication satellites have such "geosynchronous" orbits (see figure). These satellites are used to relay radi...

13 years ago

Use a table of trigonometric values to find the angle è in the right triangle in the following problem. Round to the nearest degree, if necessary. cos è =0.9659 A=? H=20

13 years ago

A box contains 25 slips of paper, numbered 1 to 25. What is the probability that one will randomly select a number that is divisible by 3 or 7?

13 years ago

Solve the following equation or inequality for the unknown variable. Round answer to two decimal places if necessary.5n + 2 = 27 n=

13 years ago

For the equation, SO2(g) + 1/2 O2(g)-> SO3(g) Kp=9.5 EQUAL partial pressures of SO2 and O2 are placed in an empty reaction vessel and heated to 600 degrees celsius. Assuming that 62% of the SO2 partial pressure has reacting to give S03, calculate the part...

13 years ago

You have .1 moles of H3PO4 in a soln with a total volume of 250 mL. You then add .15 moles of NaOH and dilute the soln to a total volume of 1L calculate the pH of the resulting soln and the concentrations of all aqueous species. Thanks!!!!

13 years ago

The Ksp for calcium fluoride (CaF2) is 3.9 x 10^–11 at 25°C. How many moles of solid NaF must be added to 1.00 L of 0.100 M CaCl2 in order to precipitate CaF2? Please help me set up this ICE table and understand how to solve this!! thank you!!

13 years ago

Glutamate (Glu–) is the conjugate base form of glutamic acid (HGlu). The Ka of glutamic acid is 5.012 x 10^–5. You titrate 50 mL of 0.10 M sodium glutamate solution with 0.05 M HCl solution. Calculate the pH of the solution at the equivalence point. Ive b...

13 years ago

What would you do first to order the following numbers from least to greatest? 30%, 2/3, 0.67, 8/9, 0.7

11 years ago

Blood is considered to be - A. Alive B. Lifeless C.unconscious D.none of the above ? Help please and thanks

9 years ago

What factors influence lung volume and capabilities A. Age B. Sex C. Body build D. All of the above

9 years ago

- causes contraction of the smooth muscles in the wall of the uterus. it also stimulates the ejection of milk from the lacting breast A. Prolactin B.gonadotropic C. Oxytocin D. Antidiuretic hormone

9 years ago

Answers

The following answers were posted by visitors named kellie.

so (1)(.285)=(22.4)(273.15) what do I do next?

15 years ago

thank you very much

14 years ago

Sorry- I forgot to add that the last value, (X-.31X) is raised to the 1/2 power

13 years ago

45^2=r^2/r^2....^2cancel's. Take the square root of 45*earths radius 6,380,000(in meters)=4.27x10^7

12 years ago

it is 8.94

11 years ago

What is the first activity of the digestive system A. Digestion B. Ingestion C. Movement D. Absorption

9 years ago

A. 400 B. 300 C. 200 D. 100 Is what is supposed to be with this question

9 years ago