wanszeto

[匿名]

回覆: 2

2020-04-06 1:30 pm

Solve the equation. Give exact solutions which lie in [0, 2π).?

[匿名]

回覆: 2

2020-02-09 12:42 pm

Chem Help?

[匿名]

回覆: 5

2020-02-06 1:13 pm

Find tan 75 using both sum and difference formulas. Thank you!?

[匿名]

回覆: 3

2020-02-05 5:59 pm

Maths help?

[匿名]

回覆: 2

2019-02-24 12:58 am

Prove that (1-Sec 8A) / (1-Sec 4A) = Tan 8A / Tan 2A.?

[匿名]

回覆: 9

2019-02-23 11:28 pm

Simple Ratio?

[匿名]

回覆: 2

2019-02-23 12:17 pm

A sample of 5.31 g of liquid 1‑propanol, C3H8O, is combusted with 46.4 g of oxygen gas. Carbon dioxide and water are the products.?

[匿名]

回覆: 3

2019-02-20 8:46 pm

4.8 g of a hydrocarbon fuel is burned in a calorimeter that contains 275 grams of water initially at 25.00◦C.?

[匿名]

回覆: 2

2019-02-20 3:59 pm

i need your help?

用戶46031

回覆: 2

2019-02-20 3:49 pm

Please help. Thanks?

[匿名]

回覆: 1

2019-02-20 2:08 pm

Help me with thermochemistry?

[匿名]

回覆: 4

2019-02-20 11:27 am

A soccer player kicks the ball toward a goal that is 30.0 m in front of him. The ball leaves his foot at a speed of 19.5 m/s and an angle?

[匿名]

回覆: 2

2019-02-20 11:08 am

Physics homework?

[匿名]

回覆: 4

2019-02-20 10:51 am

Is this a typo, or can you get the mass with just molar mass and molarity?

[匿名]

回覆: 2

2019-02-20 9:58 am

Given the reaction?

[匿名]

回覆: 2

2019-02-20 9:23 am

How many mL of 0.10 M NaAc solution must one add to produce a buffer of pH = 5.0?

[匿名]

回覆: 3

2019-02-20 8:44 am

Chemistry Help Please Will award best answer.?

[匿名]

回覆: 2

2019-02-20 1:30 am

A 12.5 L container of neon had a pressure change from 125 kPa to 35 kPa. What is the new volume? Show work what law?

[匿名]

回覆: 1

2019-02-20 12:25 am

95.8 L of fluorine gas is being held at a temperature of 24.5°C. If the temperature were raised to 46.9°C, what would the new volume be?

[匿名]

回覆: 1

2019-02-19 11:45 pm

Given 500 mL of an aqueous solution containing 8 g of benzoic acid. (a) How many grams of benzoic acid could be removed in a single?

[匿名]

回覆: 3

2019-02-19 1:11 pm

Compounds that dissolve in water that are NOT ionic?

[匿名]

回覆: 1

2019-02-19 8:39 pm

Calculate the pH of the solution after the addition of the following amounts of 0.0574 M HNO3 to a 80.0 ml solution of 0.0750 M aziridine.?

[匿名]

回覆: 1

2019-02-19 2:23 pm

A sample of gaseous PCl5 was introduced into an evacuated flask so that the pressure of pure PCl5 would be 0.52 atm at 436 K.?

[匿名]

回覆: 1

2019-02-19 7:22 pm

How do you use the Arrhenius concept of acid and base to explain the acidity of AlCl3?

[匿名]

回覆: 1

2019-02-19 5:42 pm

Number of groups on the central atom of CH4, H20, H3O+, NH3, NH4+, CCI3F, CO2, CO32+ ?

[匿名]

回覆: 1

2019-02-19 3:21 pm

Are the following solutions strong, weak or non-electrolytes?

[匿名]

回覆: 1

2019-02-13 5:55 pm

What is the ranking of the following compounds (1 = strongest) on the strength of their intermolecular forces between molecules? And why?

[匿名]

回覆: 2

2019-02-13 6:04 am

There are times when acid/base reaction is also a precipitation reaction. Give an example of two reactants you would combine that would?

[匿名]

回覆: 3

2019-02-13 12:28 pm

CHEM HELP!!!?

[匿名]

回覆: 1

2019-02-13 1:43 pm

the rate of the reaction?

[匿名]

回覆: 1

2019-02-12 11:42 am

Equilibrium Question?

[匿名]

回覆: 14

2019-02-06 9:25 pm

If fire need oxygen, then why does it go out when you blow on it?

[匿名]

回覆: 1

2019-02-05 10:52 pm

Please help me with Chemistry? Balancing Equations!?

[匿名]

回覆: 3

2019-02-05 10:32 am

How many total atoms of each indicated element are present in CH3(CH2)14CH3?

[匿名]

回覆: 4

2019-02-04 1:12 pm

What is the molarity of a solution that has a concentration of 10.0 g/L of NaCl?

[匿名]

回覆: 1

2019-01-12 1:00 pm

if someone could help me with my chem with work that would be great?

[匿名]

回覆: 3

2018-12-23 9:23 pm

what are the procedures involved when converting chloroethane to propylamine?

[匿名]

回覆: 1

2018-11-19 1:50 pm

Molar Solubility?

[匿名]

回覆: 2

2018-10-05 10:50 am

What is the mass of the Ar (in g) within container "B"?

[匿名]

回覆: 2

2018-09-10 12:25 pm

need help finishing these chem equations 3-phenyl 2-propanol + permanganate=? Fehling s solution + Ethanol= ? Tollen s soltuion + Butanone?

[匿名]

回覆: 3

2018-08-25 9:54 am

Please Help?

[匿名]

回覆: 1

2018-08-24 7:19 am

Chemistry?

[匿名]

回覆: 1

2018-08-24 7:20 am

Chemistry?

[匿名]

回覆: 2

2018-08-21 10:51 am

In the following diagram, A represents a radioactive isotope that decays into a new isotope, X. Each A represents 1 mmol of atoms.?

[匿名]

回覆: 3

2018-08-15 11:55 pm

Please Help?

[匿名]

回覆: 3

2018-08-10 4:35 pm

A 500-kg car is pulled with a force of 120 N, but it accelerates at just 0.1 m/s^2. What force of friction must be acting on the car?

[匿名]

回覆: 2

2018-08-10 3:25 pm

Which term of the sequence 18,12,8,.... is (512/729)? (Geometric Progression) The books shows that the answer is 9th but I’m getting 10th?

[匿名]

回覆: 3

2018-08-01 8:36 am

The valence for carbon is +2 and oxygen is −2. What is the correct formula for carbon monoxide? 1. CO 2. CO2 3. C2O 4. C2O3?

[匿名]

回覆: 5

2018-07-31 10:39 pm

How many grams is 4.2x1024 atoms of sulfur?

[匿名]

回覆: 4

2018-07-31 9:27 pm

In the figure, AB¯¯¯¯¯∥CD¯¯¯¯¯ and m∠2=55°. What is m∠8? Enter your answer in the box.?