Chemistry

Can anyone please help answer this chemistry question?
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what numbers go in the blank _Na2Co3+_HCI > _NaCl+H2O+_CO2
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Copy the sentences below. Correcting the five mistakes.In a displacement reaction, a less reactive metal pushes out a more reactive metal from its compound. For example, iron displaces aluminium from aluminium oxide.
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2 M n O 2 + 4 K O H + O 2 + C l 2 2 K M n O 4 + 2 K C l + 2 H 2 O , there are 100.0 g of each reactant available. Which reactant is the limiting reagent?
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what is the compound of scI2
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what is the same between mass and weight
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List and describe the steps of energy transfers that occur that allow a digital recording to be played through a speaker and ultimately become sound waves.
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Which is the molar mass of Calcium?
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How many times more acidic is a pH of 2 than a PH of 7?
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Why is the reaction SO2 + H20 H2SO2 not balanced?A. The oxygen atoms are in two molecules on one side, but one inthe other.OB. There are more molecules on one side than on the other.OC. There are more oxygen atoms on one side than on the other.OD. The sulfur atom is in different places in reactant and productmoleculesSUBMIT
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how many number of electrons are in aluminium and nitrogen in their free state?
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URGENT WHOEVER ANSWER CORRECT GETS BRAINLIEST ANSWER!!!!!! use the information in the table to calculate the ages of the meteorites. The half-life of potassium-40 is 1.3 billion years. MeteoriteInitial Amount (g)Final Amount (g) 1307.5 2805 310012.5 Use your calculations to answer the questions. How old is meteorite 1? How old is meteorite 2? How old is meteorite 3?
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The specific heat capacity of lead is 0.130 J/g-K. How much heatis required to raise the temperature of 15.0 g of lead from 22.0 Cto 37.0 C?
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What is the pH of a 6.50 x 10-3 M KOH solution?
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Which of the following statements is NOT true?A. The corn that we grow today has not changed since prehistoric times.B. Early humans planted seeds from corn plants with large kernels.C. It took many generations for corn plants to change.D. Humans have selectively bred many different types of crops.
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A radioactive isotope has a half life of 25 minutes. How many half lives have occurred after 175 minutes?5678Will give Brainliest
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Use the IUPAC nomenclature rules to give the name for this compound - CrPO4.
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Is the equation Zn+HCl > ZnCL2+H2 unbalanced or balanced
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What is the mass defect of a mole of nuclei with 1.8 x 10^15 J/mol bindingenergy?
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How many grams is 4.2X10^24 atoms of sulfur?
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sum of all forces acting on object is it a forces, unbalanced forces , balanced forces, net forces
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5) Low iron concentration (as low as 0.02 nM) in the open ocean limits phytoplankton growth. Preconcentration is required to determine such low concentrations. Trace Fe3 from a large volume of seawater is concentrated onto a 1.2 mL chelating resin column, the column is then rinsed with 30 mL of high purity water and eluted with 10 mL of 1.5 M high purity HNO3. a.) For each sample, seawater is passed through the column of 17 h at 10 mL./min. How much is the concentration of Fe3 in the 10 mL of HNO3 eluate increased by this preconcentration procedure
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33 types of clouds and locations
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Light brings many chemical changes. Can you think of any chemical change brought about by light?
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