05/01/21

What is the charge AND number of valence electrons in Phosphorous?
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05/01/21

What is the molarity of a 2.1g sample of Lithium Carbonate that is dissolved in 500mL of water?
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05/01/21

Find the number of moles in 5 grams of Calcium Chloride.
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05/01/21

How many grams of Copper Hydroxide will be produced?
If 3.00 grams of copper(II)nitrate reacts with 4.35 grams of sodium hydroxide, how many grams of copper(II)hydroxide would be produced? a. 0.783grams b. 1.56grams c. 1.38grams
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04/30/21

Calculate the pH of a 0.206 M Ba(OH)2 solution.
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04/30/21

Can someone help me with this problem? Determine the moles of oxygen gas (O2) needed to completely react with 1.975 moles of hydrogen gas (H2). 2 H2 (g) + 1 )2 (g) → 2 H2O
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04/30/21

A sample is composed of 4.32 x 1022 H2SO4 molecules. What is the mass of the H2SO4?
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04/30/21

How many atoms are i 32.2 g Al?
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04/30/21

Write and balance the following chemical equations: nitrogen and oxygen combine to form dinitrogen pentoxide.
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04/30/21

What is the pOH of a solution...
What is the pOH of a solution that contains [H3O+] of 3.10 x 10-9 M ?a.8.49b.6.49c.7.49d.5.49
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04/23/21

How many moles of NO can be produced from 2.35 g of NH3 according to this reaction: 4 NH3 + 5 02 --> 4 NO + 6H2O
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04/23/21

How many moles of oxygen react with hydrogen to produce 1.85 mol of water?

Balanced equation: 2H2 + O2 --> 2H2O
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04/23/21

Answer please ... Thank you
Jazmine analyzes a compound having the following percentage composition by mass: carbon, 53.31%; hydrogen, 11.19%; oxygen, 35.51%. In a separate experiment, she finds that the molar mass of the... more
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04/23/21

I need help with stoichiometry work
Given the following equation2K+Cl2–>2KClhow many moles of Cl2 are produced from 2.50 moles K?
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04/23/21

Need help with stoichiometry work ASAP
Given the following equation:2NaClO3–>2NaCl+3O22.00 moles of NaClO3 will produce how many moles of O2?
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04/23/21

What was the initial temperature if 1045 joules were applied to 100 grams of gold and the final temperature of the gold was 175oC? The specific heat capacity of gold is 0.13 J/goC.
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04/23/21

How many grams of aluminum can be heated from 90oC to 120oC if 2090 joules are applied? The specific heat of aluminum is 0.88 J/goC.
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04/23/21

154 grams of antifreeze absorbs 504 Joules of energy in going from 21°C to 35°C. what is the specific heat of the antifreeze?

154 grams of antifreeze absorbs 504 Joules of energy in going from 21°C to 35°C. what is the specific heat of the antifreeze? Show your work and round your answer to the hundredths place. 
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04/22/21

What mass of KOH would need to be dissolved in 500.0 mL of water to produce a solution with a pH of 12.40?
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04/22/21

How many joules are needed to raise 50 grams of iron from 55oC to 200oC? The specific heat capacity of iron is 0.46 J/goC.
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04/22/21

The pH of an aqueous solution is measured as 1.79. Calculate the [H3O +].
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04/22/21

How many moles of water vapor can be made from 4.9x10^22 molecules H2?
The equation is: 2H2(g)+O2(g)=2H2O(g)
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04/22/21

How many liters of water vapor can be produced from 26 mol O2 at STP?
The equation is: 2H2(g)+O2(g)=2H2O(g)
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04/22/21

What is the percent yield?
A reaction between tin and fluorine is supposed to yield 65 g SnF4. Instead, only 52 g SnF4 is produced.
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04/22/21

Calculate the [H3O+1] if [OH-1]= 1.41 x 10-7 M
a. 1.41 x 10-7 Mb. 7.09 x 10-8 Mc. 1.41 x 10-8 Md. 1.00 x 10-7 Me. 1.00 x 10-14 M
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