11/14/21

Calculate the percentage by weight of a solution of 400 grams of sulfuric acid (H2SO4) in a solution with 4 liters of water.
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11/14/21

Calculate the volume of water necessary to obtain a solution of 150 grams of NaCl 19% by Weight.
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11/14/21

Balancing Question
Balance the reaction‎‎‎‎‎‎, write the total‎‎‎‎‎‎ and‎‎‎ net‎‎‎ i‎‎‎onic equa‎‎‎‎tionStrontium bromide reacts with ammonium sulfate
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11/14/21

determining the volume of base needed to titrate
A chemistry student weighs out 0.0345 g of acrylic acid (HCH2CHCO2) into a 250. mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid... more
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11/14/21

Lewis Dot and Molecular Geometry / Shape
What would the shapes be for a central atom with:1) 4 atoms and 1 lone pair.2) 5 atoms and 2 lone pairs.3) 5 atoms and 0 lone pairs.4) 3 atoms and 2 lone pairs.5) 4 atoms and 1 lone pair (no, this... more
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11/13/21

When the concentration of cellular protein increase, this is most likely due to?
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11/13/21

100g Of a ground mineral sample consisting of a mixture of MgCO3 (magnesite) and BaCO3 (witherite) was heated to completely convert the carbonates to their metal oxide
after the reaction 60.95 g of the metal oxide mixture was obtained. What was the mass of MgCO3 in the original sample?
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11/13/21

A mixture contains Mg(NO₃)₂ and KBr. A 1.85 g sample of this mixture is dissolved in water and an excess of NaOH is added, producing a precipitate of Mg(OH)₂.

The precipitate is filtered, dried, and weighed. The mass of the precipitate is 0.265 g. What is the mass percent of Mg(NO₃)₂ in the original mixture?
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11/13/21

100.0 g of a ground mineral sample consisting of a mixture of MgCO₃ (magnesite) and BaCO₃ (witherite) was heated to completely convert the carbonates to their metal oxides
After the reaction 60.95 g of the metal oxide mixture was obtained. What was the mass of MgCO₃ in the original sample?
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11/13/21

What volume in milliliters of 0.0160 M Ca(OH)₂ is required to neutralize 75.0 mL of 0.0300 M HCl?
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11/12/21

Write the balanced COMPLETE ionic equation for the reaction when Na₂CO₃ and AgNO₃ are mixed in aqueous solution. If no reaction occurs, simply write only NR.
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11/12/21

Write the balanced COMPLETE ionic equation for the reaction when KI and AgNO₃ are mixed in aqueous solution. If no reaction occurs, simply write only NR.
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11/12/21

Complete the balanced molecular chemical equation for the reaction below. If no reaction occurs, write NR after the reaction arrow.
NaCl(aq) + Hg₂(C₂H₃O₂)₂(aq) →
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11/12/21

The positive side of a household battery is called the ________.
A. anodeB. cathodeC. diodeD. triodeE. None of the above
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11/12/21

Complete the balanced molecular chemical equation for the reaction below. If no reaction occurs, write NR after the reaction arrow.
CaBr2(aq)+AgNO3 (aq) --->
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11/12/21

At what temperature will a 1.00 g sample of neon gas exert a pressure of 500. torr in a 5.00 L container?
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11/12/21

Chemistry Problem
What volume of solution will contain 35g of NaCl if the solution concentration is 0.85 M?(add steps please thank youu! :D)
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11/11/21

Chemistry calculation help
1 Does temperature make a difference in how much carbon dioxide gas is needed to inflate a 60-L air bag using the reaction of sodium bicarbonate and acetic acid? Compare a winter day at 0°C and... more
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11/11/21

determining the volume of base needed to titrate
A chemistry student weighs out 0.310g of ascorbic acid H2C6H6O6, a diprotic acid, into a 250.mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid... more
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11/11/21

Coffee Calorimetry

When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be determined using a coffee cup calorimeter. In the laboratory a general chemistry... more
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11/11/21

chemistry calorimetry

In the laboratory a student uses a "coffee cup" calorimeter to determine the specific heat of a metal.  She heats 19.0 grams of copper to 99.29°C and then drops it into a cup containing 77.5 grams... more
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11/11/21

Calculate the amount of heat released by 35 g of water at 100.°C as it touches the skin and cools to a body temperature of 37°C.
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11/11/21

The pOH of a basic solution is 6.29. What is [H⁺]?
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11/11/21

What is meant by the phrase, “the energy of an electron in a given orbital is quantized”?
Need help explaining this, as I'm not confident with the definition of quantized energy.
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11/11/21

Question about Redox Balancing Rxn.
Balance the redox reaction.Indicate the reducing agent and the oxidizing agent for each reaction.Cr2O72- + U4+ → Cr3+ + UO22+ (acidic)
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