Chemistry

30Jan

what are five observable properties of matter?

nahary Chemistry 1 0
30Jan

Which element has the greatest electronegativity? a. Chlorine b. Oxygen c. Sulfur d. Phosphorus e. Fluorine

Shaun01 Chemistry 1 0
30Jan

what mass of sodium chloride is produced when chlorine gas reacts with 0.29 grams of sodium iodide? working on stoichiometry and need help!

alayah2westbrook Chemistry 1 0
30Jan

Which of the following solutions would show the greatest conductivity at 30°C? A. 0.20 M Ca(NO₃)₂ B. 0.25 M HCl C. 0.30 M NaOH D. 0.10 M NaCl E. 0.40 M CH₃OH

jamonlone Chemistry 1 0
30Jan

What holds solid sodium together? A. hydrogen bonding B. metallic bonding C. ionic bonding D. dipole forces E. van der Waals forces (London dispersion forces)

jasmine23philli Chemistry 1 0
30Jan

What were the names of the minerals and types of rocks?

Merkling865 Chemistry 2 0
30Jan

How many neutrons does xenon have? 

cmg01 Chemistry 1 0
30Jan

What everyday activity involves measurement?

Clairegrandlien Chemistry 2 0
30Jan

Iron(III) sulfite has the formula a) Fe₃SO₃ b) Fe₂(SO₄)₃ c) Fe₂(SO₃)₃ d) Fe₂SO₄ e) Fe₂SO₃

Kay6 Chemistry 1 0
30Jan

A solution can be both a. Dilute and concentrated b. Saturated and dilute c. Saturated and unsaturated d. Supersaturated and saturated e. None of these

Alexandro Chemistry 1 0
30Jan

Which statement regarding significant figures is false? a. Zeros can be significant b. When multiplying, the answer is determined by the number of significant figures c. When adding, the answer is determined by the number of decimal places d. When dividing, the answer is determined by the number of decimal places e. The number 50,004 has five significant figures

katwolff Chemistry 1 0
30Jan

How many atoms of carbon are in 24 grams of carbon? a) 1.2 x 10²⁴ atoms b) 1.7 x 10²⁶ atoms c) 1.2 x 10²⁵ atoms d) 3.0 x 10²⁴ atoms e) 3.0 x 10²³ atoms Can anyone explain this one?

gineleugen123 Chemistry 1 0
30Jan

why is water vapor important in weather  

kinaryossyseti Chemistry 1 0
30Jan

Fill in the missing reactant: NaOH + _____ → NaClO₂ + H₂O a. Cl₂ b. HCl c. HClO d. HClO₂ e. HClO₃

SofiaOseguera320 Chemistry 1 1
30Jan

contains elements in the solid, liquid, and gas phase a. alkali metals b. alkaline earth metals c. transition metals d. halogens e. noble or inert gases

eletteward Chemistry 1 0
30Jan

PLEASE HELP What are 10 scientific things that happened in the hunger games

karanbrar12 Chemistry 1 0
30Jan

What does the drop in barometric pressure from 1003 millibars to 926 millibars tell  you about a hurricane?

pimpsouljah Chemistry 1 0
30Jan

The quantity “one mole” will not be equal to a. 22.4 L of H₂(g) at STP b. 6.02 x 10²³ carbon atoms c. 64 grams of SO₂(g) d. 36 grams of H₂O e. 207 grams of Pb

Angelslove5150 Chemistry 1 0
30Jan

Consider the following equation: 4NH₄ + 5O₂ → 4 NO + 6H₂O How many moles of water are produced when 2 moles of NH4 react with excess Oxygen gas?

Jacobrobles909 Chemistry 1 0
30Jan

Aluminium oxide is used as a catalyst to speed up the reaction. Suggest another reason for using a catalyst. ?

isabelher Chemistry 1 0
30Jan

An element is identified by: A. Its number of protons B.the atomic mass C. The type of charge D.its number of isotopes

kielee Chemistry 2 0
30Jan

Why is the equation incorrect? Mg₃ + N₂ → Mg₃N₂ (A) Some of the subscripts are incorrectly used. (B) The equation is not balanced. (C) The valence of the nitride ion is incorrect. (D) The valance of the magnesium ion is incorrect. (E) The coefficient of N₂ is incorrect. Can someone explain this one?

EarlKipping867 Chemistry 2 0
30Jan

What is the main intermolecular force in H2CO? (dipole dipole, hydrogen bond, London dispersion,polar/nonpolar)

Millare828 Chemistry 1 0
30Jan

Which of the following has the most electrons? A) Sr^{2+} B) Rb C) Cl^{-} D) Kr

KarolineFutterman Chemistry 1 0
30Jan

A sample of gas occupies 26.5 L under a pressure of 1.3 atm. What would the resulting volume be if the pressure were increased to 3.9 atm if the temperature did not change?

shortOne Chemistry 1 0