Based on dalton's atomic theory, which of the following is true about all atoms of the same element?
a. they have different masses
b. they have the same properties.
c. they can be divided into molecules.
d. they are composed of visible matter.
2. which of the following is a compound?
a. ne
b. n2
c. naci
d. o2
3.which of the following indicates that an endothermic reaction has occurred?
a. heat is released
b. water is formed
c. salt is produced
d. temperature decreases
4. what is a homogeneous mixture called when microscopically insoluble particles are suspended throughout another substance?
a. colloid
b. compound
c. emulsion
d. solution
5. which particle moves around the nucleus?
a. electron
b. molecule
c. neutron
d. proton
6. two different sub-atomic particles are described below:
particle x: no charge
particle y: outside the nucleus
which statement is true?
a. x is a neutron and y is an electron
b. x is a neutron and y is a proton
c. x is a proton and y is an electron
d. x is an electron and y is a proton.
Answers: 1
Chemistry, 22.06.2019 11:00
Predict the products of the following acid-base reactions, and predict whether the equilibrium lies to the left or to the right of the reaction arrow.part ao2-(aq)+h2o(l)< => express your answer as part of a chemical equation. identify all of the phases in your answer.o2-(aq)+h2o(l) < => oh-(aq)+oh-(aq)part bpredict whether the equilibrium lies to the left or to the right of the equation in previous part.h2o is a stronger acid than oh–, so the equilibrium lies to the right.h2o is a weaker acid than oh–, so the equilibrium lies to the left.h2o is a stronger acid than oh–, so the equilibrium lies to the left.h2o is a weaker acid than oh–, so the equilibrium lies to the right.part cch3cooh(aq)+hs? (aq) < => express your answer as part of a chemical equation. identify all of the phases in your answer.ch3cooh(aq)+hs-(aq) < => h2s(aq)+c2h3o2-(aq)h2s(aq)+c2h3o2-(aq)part dpredict whether the equilibrium lies to the left or to the right of the equation in previous part.ch3cooh is a weaker acid than h2s, so the equilibrium lies to the right.ch3cooh is a weaker acid than h2s, so the equilibrium lies to the left.ch3cooh is a stronger acid than h2s, so the equilibrium lies to the right.ch3cooh is a stronger acid than h2s, so the equilibrium lies to the left.part eno2-(aq)+h2o(l) < => express your answer as part of a chemical equation. identify all of the phases in your answer.no2-(aq)+h2o(l) < => part fpredict whether the equilibrium lies to the left or to the right of the equation in previous part.hno2 is a stronger acid than h2o, so the equilibrium lies to the right.hno2 is a weaker acid than h2o, so the equilibrium lies to the left.hno2 is a stronger acid than h2o, so the equilibrium lies to the left.hno2 is a weaker acid than h2o, so the equilibrium lies to the right.
Answers: 1
Chemistry, 22.06.2019 23:00
What is the solubility-product constant of barium sulfate, baso4, if a saturated solution is 1.03 ´ 10-5 m?
Answers: 3
Based on dalton's atomic theory, which of the following is true about all atoms of the same element?...
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