A student estimated a mass to be 250 g but, upon carefully measuring it, found the value to be 240 g. What is the percent error of the estimated mass if the measured value is the accepted one?

A. 4.0%

B. - 4.2%

C. - 4.0%

D. 4.2%

The atomic mass of an element is the weighted average of the atomic masses of

Carlos is making phosphorous trichloride using the equation below. He adds 15 g of phosphorus. 2P + 3Cl2 → 2PCl3 How much chlorine would be found in the product

Besides water, what is the product of a Neutalization Reaction between H2SO4 and LiOH? a. LiSO4 b. HOH c. LiS d. Li2SO4

A chemical that causes a sudden, almost instantaneous release of pressure, gas and heat when subjected to sudden shock, pressure or high temperatures best describes which type of dot hazardous materials classification?

Se mezclaron 2 soluciones de dicromato de potasio : 250 ml de una molaridad de 1.24m y 380ml de otra 0.65N. Determina la molaridad de la solución restante

When is alpha particle emission most likely to occur? A. When the nucleus has more than 83 protons. B. When the ratio of neutrons to protons in the nucleus is too high to be stable. C. When the nucleus has a mass of more than 83 amu. D.

Researchers used a combustion method to analyze a compound used as an antiknock additive in gasoline. A 9.394 mg sample of the compound yielded 31.154 mg of carbon dioxide and 7.977 mg of water in the combustion.

The formula for binary ionic compound formed between cesium and fluorine

If the mass of a material is 76 grams and the volume of the material is 16 cm3, what would the density of the material be? g/cm3

Calculate the specific heat of a metallic element if 50.0 g of the metal need 314 joules of heat energy to raise the temperature from 25°C to 50°C.