# Chemistry

0.3975 g of an oxide of divalent metal on reduction with hydrogen gives 0.090 g of water. The atomic weight of metal is:
a) 63.5
b) 24
c) 55.5
d) 40

1. 👍
2. 👎
3. 👁
1. MO + H2 ==>M + H2O
0.090 x (molar mass MO/molar mass H2O) = 0.3975
Solve for molar mass MO, subtract 18 to arrive at atomic mass M.

1. 👍
2. 👎

## Similar Questions

1. ### Chemistry

The steps to getting the answer. A certain metal oxide has the formula MO where M denotes the metal. A 39.46g sample of the compound is strongly heated in an atmosphere of hydrogen to remove oxygen as water molecules. At the end,

2. ### Chemistry

0.222g Of A Divalent Metal Is Deposited When A Current Of 0.45 Amperes Is Passed Through A Solution Of It's Salt For 25 Minutes Using Appropriate Electrodes. Calculate The Relative Atomic Mass Of The Metal. (1 Faraday =96500c/mol)

3. ### Chemistry

Bauxite ore contains aluminum oxide Al2O3(s) which is decomposed using electricity to produce aluminum metal and oxygen gas. What mass of aluminum metal can be procuced from 155g of aluminum oxide?

4. ### Chemistry

A particular metallic element, M, has a heat capacity of 0.36 J*g*K, and it forms an oxide that contains 2.90 grams of M per gram of oxygen. (a) Using the law of Dulong and Petit (Cp x M = 25 J*mol*K), estimate the molar mass of

1. ### chemistry 2

the balanced equation for the reduction of iron ore to the metal using CO is Fe2O3+3CO(g) -> 2Fe+3CO so what is the maximum of iron in grams that can bbe obtained from 454g (1.00 lb) of iron (III) oxide? AND what mass of CO is

12. What balances charges that may build up as reduction and oxidation occur in a voltaic cell? *the salt bridge one of the half-cells the electrolyte solutions the moving electrons 13. What is the electrode in the center of the

3. ### Chemistry

A metal x with relative atomic mass 56 form an oxide with formula X2 O3 how many grams of metal will combine with 10g of oxygen:?(O=16)

4. ### Chemistry

A metal x with relative atomic mass 56 forms an oxide with formula x2O3 . How many grams of metal will combine with 10g of oxygen?(o= 16)

1. ### Chemistry

When copper(II) oxide is heated in the presence of hydrogen gas, elemental copper and water are produced. What mass of copper can be obtained if 34.0 g copper(II) oxide is used?

2. ### Chemistry

0.222g of a divalent metal is deposited when a current of 0.45ampere is passed through a solution of salt for 25min. Calculate the relative atomic mass of the metal

3. ### chemistry

when aluminum metal reacts with iron (III) oxide to form aluminum oxide and iron metal, 429.6 kJ of heat are given off for each mole of aluminum metal consumed, under constant pressure and standard conditions. What is the correct

4. ### Chemistry

Write the chemical reaction of lithium metal in a solution of silver nitrate. Indicate the charge of each species. Clearly indicate which metal is undergoing oxidation and which metal is undergoing reduction. State which ion is