12/06/18

rvation of Matter stated that matter can't be created or destroyed, she was puzzled about the difference in mass. What is the best explanation for the missing 2 g?
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12/05/18

How many molecules of lithium nitride must react in order to produce 24.7g of strontium phosphate?
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12/05/18

Balance lithium nitride reacts with strontium phosphate
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12/05/18

How many grams of Ag will be produced from 19.0g of Cu and 125g of AgNO3?
The equation is: Cu+2AgNO3 = 2Ag+Cu(NO3)2
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12/05/18

If a rock displaces 5 ml of water,it means the volume of the rock is?
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12/05/18

2Cu2O(s) + O2(g) → 4CuO(s) Determine the mass (in g) of CuO formed if 61.6 g of Cu2O reacts with 56.6 g of O2. g CuO
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12/05/18

4KO2(s) + 2H2O(l) → 4KOH(s) + 3O2(g) Determine the mass (in g) of KOH formed if 34.6 g of KO2 reacts with 34.6 g of H2O.
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12/05/18

How much Plutonium would have remained after 1 million years?
The U.S. government spent nearly $10 billion planning and developing a nuclear waste facility at Yucca Mountain (Nevada), though the project was cancelled in 2011. The intent had been for the... more
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12/05/18

CHEMISTRY QUESTION

I've tried this question again and again but my solution is incorrect... can someone pls help me?What amount of thermal energy (in kJ) is required to convert 40.7 g of ethanol at -158 °C completely... more
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12/05/18

What mass, in grams, of NO2 is needed to form 195.4 g of NO? Assume excess water.
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12/05/18

How much methanol (CH3OH, in grams) can be formed from 58.7 g of hydrogen? Assume excess CO. CO(g) + 2H2(g) → CH3OH(g)
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12/05/18

A student sets up the following equation to convert a measurement. (The ? stands for a number the student is going to calculate.) Fill in the missing part of this equation (0.040 mol/kg) * _= mol/g
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12/04/18

What is the specific heat (c) of the substance?
A 53.11 g sample of a substance is initially at 27.4 °C. After absorbing 2741 J of heat, the temperature of the substance is 138.1 °C. What is the specific heat (c) of the substance?
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12/04/18

What is the effect on a cell when a transport protein is damaged or missing?
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12/04/18

Mg(s) + 2 HCl(aq) --> MgCl2(aq) + H2(g) how many moles of Mg are there? how many moles of hydrogen gas?

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12/04/18

Algebra Question
Reacting with water in an acidic solution at a particular​ temperature, compound A decomposes into compounds B and C according to the law of uninhibited decay. An initial amount of .40 M of... more
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12/03/18

How do you find the percent of change?
This is for math class, for my test. I really need help! Thanks!
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12/03/18

A homeostatic process is one that
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12/03/18

You are traveling by car and leave home at 8 am. By 9am, you are 36 miles from home. Find the average speed in miles per hour.

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12/03/18

What is the value of 3/8 divided by 2/5?
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12/03/18

Decomposition Reaction of limestone
The decomposition of limestone, CaCO3 into lime, CaO, and CO2 requires the addition of 178.1 kJ of heat per mole of CaCO3. a. Write a balanced equation. (I balanced this to CaCO3 --> CaO +... more
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12/03/18

The complete combustion of acetic acid
I had a lot of trouble doing this and research online didn't help me much either. This is similar to what my homework is-The complete combustion of acetic acid, HC2H302 to form H2O and CO2 at... more
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12/03/18

Lead (II) Nitrate and potassium iodide are combined.
His many liters of 0.150 M potassium iodide would be required to react completely with 15.00 grams of lead (II) Nitrate?
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12/02/18

Do chlorine and oxygen bond covalently or ionically to create hypochlorite?
For school, we were given questions about the bonds of hypochlorite.
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12/02/18

What is balanced net reaction?
What is balanced net reaction? Is it different from net ionic equation? I am told to predict the products of the following reactants in solution and provide the balanced net reaction. I wasn't sure... more
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