Question

1. cL, Km and cm3 are metric units that measure the following..? 2. A small flask...

1. cL, Km and cm3 are metric units that measure the following..?

2. A small flask weighs 135.75 grams. When is filled completely with ethyl alchol, it weighs 178.07g. When the flask is filled completely with liquid carbon disulfide, it weighs 203.49g the density of carbon sulfide is 1.263g/ml. what is denisity of the ethyl alcohol?

3. A mixture is...?

4. How many protons are in the nucleus of the silicon atom?

5. How many moles of sulfide atoms are there in 1 mole of Fe2(SO4)3?

6. What is the formula of Calcium Ion?

7. What is the formula for magnesium nitrate?

8. What is the molecular weight of Ca3(PO4)2 to the nearest whole number?

9.   How many moles of NO2 are contained in 45.1g of NO2?

10. How many grams of Al are reuired to react completely with 4.30g of HCi according to the following equation?    2Al +6HCl -> 2AlCl3 + 3H2

11. Concentrated sodium hydoxide solution contains 50.0% by mass NaOH an has density of 1.52g/mL. What volume of this solution in mL. required to abotain 1.35g of N6OH?

Science   Chemistry   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

1)

cL = centiliter; volume

Km = kilometer, lenght

cm3 = cubic centimeter, volume

2.

ethyl alcohol is a liquid, then it has a constant density, it must be 0.789 g/ml

3)

a mixuture is a set of at least two or more pure substance together

4)

Silicon has the atomic number Z= 14

which means that protons = Z = 14 protons

NOTE: consider posting all other questions in another set of Q&A. We are not allowed to answer to multiple questions in a single set of Q&A

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Q1: Convert 23.5 g Ti to moles Q2: We need 0.254 moles of Iron (III) chloride...
Q1: Convert 23.5 g Ti to moles Q2: We need 0.254 moles of Iron (III) chloride for an experiment. How many grams do we need to weigh? Q3: Tungsten wire is the filament inside most old­style incandescent light bulbs. In a typical light bulb, the tungsten filament weighs 0.635 grams. How many atoms of tungsten are there in such a light bulb filament? Q4:Calcium phosphate is widely found in nature in the form of natural minerals. Is is also found...
1- A student weighs out a 11.8 g sample of copper(II) acetate, transfers it to a...
1- A student weighs out a 11.8 g sample of copper(II) acetate, transfers it to a 300 mL volumetric flask, adds enough water to dissolve it and then adds water to the 300 mL tic mark. What is the molarity of Cu(CH3COO)2 in the resulting solution? 2- How many moles of potassium hydroxide, KOH, are there in 257 mL of a 0.158 M solution? 3- A student wants to prepare a solution of zinc acetate with a known molarity. How...
1. Given the following reaction     2C2H6(l)   +      7 O2(g)   ®           4CO2(g)      +     
1. Given the following reaction     2C2H6(l)   +      7 O2(g)   ®           4CO2(g)      +        6H2O(l) How many moles of water are produced when 4.5 moles of oxygen react?        (Hint: Use slides 5-8) 2. Given: I2     +    3 F2      ®     2 IF3 How many moles of I2 are needed to form 3 moles of IF3? How many moles of F2 are needed to form 10 moles of IF3? How many moles of I2 are needed to react with 3.5 moles of F2?        ...
1- How many moles of N2O5 contain the same number of nitrogen atoms as exactly 19...
1- How many moles of N2O5 contain the same number of nitrogen atoms as exactly 19 mol of NO2? 2- How many grams are contained in 0.900 mol of calcium phosphate, Ca3 (PO4)2? 3- Ga Number of electrons =_______ electrons Number of protons = _________protons 4- element number 79 Number of electrons = _____electrons Number of protons = ______protons 5- What are the symbol and name for an element whose average atoms have a mass that is 59.6% of the...
1.Suppose you want to add 100 mL of solvent to a reaction flask. Which piece of...
1.Suppose you want to add 100 mL of solvent to a reaction flask. Which piece of glassware shown in Figure 2.4 would be the best choice for accomplishing this task and why? 2. A reaction requires 21.5g of CHCl3. No balance is available, so it will have to be measured by volume. How many mL of CHCl3 need to be taken? (Density of CHCl3 is 1.484 g/mL.) 3. A 25.27-g sample of pure sodium was prepared for an experiment. How...
2.According to the following reaction, how many grams of dinitrogen monoxide will be formed upon the...
2.According to the following reaction, how many grams of dinitrogen monoxide will be formed upon the complete reaction of 28.0 grams of ammonium nitrate? 3.According to the following reaction, how many grams of hydrobromic acid are needed to form 25.4 grams of bromine 4For the following reaction, 3.96grams of chlorine gas are mixed with excess bromine . The reaction yields 11.3 grams of bromine monochloride . bromine ( g ) + chlorine ( g ) bromine monochloride ( g )...
1. What would be a more appropriate name for 1 methyl butane? 2. A gas occupies...
1. What would be a more appropriate name for 1 methyl butane? 2. A gas occupies 600 ml at 0.75 atm pressure. What will be its volume, at constant temperature, if the pressure is changed to 760 mm Hg? 3. In Propane what is the structural geometry around each Carbon atom? 4. Give two reasons for the diversity of organic compounds. 5. How many moles of NH3 gas are present in a 1.00L flask at STP? 6. Identify the following...
Answer the following for the reaction: NiCl2(aq)+2NaOH(aq)→Ni(OH)2(s)+2NaCl(aq) 1.How many milliliters of 0.200M NaOH solution are needed...
Answer the following for the reaction: NiCl2(aq)+2NaOH(aq)→Ni(OH)2(s)+2NaCl(aq) 1.How many milliliters of 0.200M NaOH solution are needed to react with 26.0 mL of a 0.420 M NiCl2 solution? 2.How many grams of Ni(OH)2 are produced from the reaction of 48.0 mL of a 1.80 M NaOH solution and excess NiCl2 ? 3.What is the molarity of 30.0 mL of a NiCl2 solution that reacts completely with 11.3 mL of a 0.360 M NaOH solution?
please answer these questions 1-Consider the following balanced equation: 2 Fe(s) + 3 Cl2(g) → 2...
please answer these questions 1-Consider the following balanced equation: 2 Fe(s) + 3 Cl2(g) → 2 FeCl3(s) How many moles of iron(III) chloride are obtained when 7.67 moles of chlorine gas react with excess solid iron? Assume the reaction is 100% efficient. 2- What mass of hydrochloric acid must have reacted with magnesium if 9.56 grams of hydrogen were produced? Include units with your answer. The UNBALANCED equation is provided: Mg(s) + HCl(aq) → H2(g) + MgCl2(aq) 3- What volume...
Nomenclature lab: will choose best answr NM NM = nonmetal -3 -2 -1 NM +1 +2...
Nomenclature lab: will choose best answr NM NM = nonmetal -3 -2 -1 NM +1 +2 md = metalloid md NM NM NM NM NM +1 +2 +3 md NM NM NM NM +1 +2 +2 md md NM NM NM +1 +2 +1 md md NM NM +1 +2 md NM +1 +2 Type I Binary Ionic Compounds Type I binary ionic compounds contain a metal and a nonmetal AND the metal that is present only forms one type...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT