Chem Q1 Question 19
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Question 19 4 / 4 points What is the identity of element Q if the ion Q?2* contains 18 electrons? S5 ) Si ) Ar (@) Ca W Hide question 19 feedback See Chapter 2
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Boron trifluoride gas is collected at -19.0 °C in an evacuated flask with a measured volume of 25.0 L. When all the gas has
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Combustion of hydrocarbons such as pentane (C,H,2) produces carbon dioxide, a "greenhouse gas." Greenhouse gases in the
Earth's atmosphere can trap the Sun's heat, raising the average temperature of the Earth. For this reason there has been a
great deal of international discussion about whether to regulate the production of carbon dioxide.
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Which of the followings about Fe(NO3)3 is wrong?
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O B) iron transfer 3 electrons to nitrate groups
O C) nitrate ion is -1 charged
O D) ionic compound
O E) charge of iron is +3
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Calculating partial pressure in a gas mixture
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A 9.00 L tank at 3.36 °C is filled with 13.2 g of boron trifluoride gas and 9.61 g of dinitrogen difluoride gas. You can assume
both gases behave as ideal gases under these conditions.
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Solve subparts 10 and 11
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Question completion Status:
What is the symbol of the element in Group 4A(14) and Period 2?
C
Be
Ca
Si
Mg
00000
QUESTION 26
41
Given the following: 19 X,
39
41
19 X, 20 X, and
41
39
X and X are isotopes of each other.
19
19
O 41
41
X and. X are isotopes of each other, and
19
20
O 41 39 41
X,
39
19
19 20 X, and
18
O None are isotopes of each other.
QUESTION 27
39
18 X. Which are isotopes of each other?
Valence electrons are electrons located
O throughout the atom.
in the nucleus of an atom.
in the outermost energy level of an atom.
in the innermost energy level of an atom.
in the first three shells of an atom.
39
X are isotopes of each other.
19
X and
39
18
X are isotopes of each other.
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Which element is NOT a main group element?
Question 3 options:
Ca
Pb
Fe
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Quiz #2 Chapter #2
The table below describes four atoms.
Atom A
Atom B
Atom C Atom D
Number of protons
79
81
80
79
Number of neutrons
118
120
118
120
Number of electrons
79
81
80
79
X 00 59.04
Which atoms represent the same element?
Multiple Choice
A and C represent the same element
C and D represent the same element
B and C represent the same element
A and B represent the same element
A and D represent the same element
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QUESTION 12
Which of the following statement is/are False
O As you move down a group: Atoms generally get smaller
O As you move across a period: atoms get bigger
O Atomic size of chlorine is bigger than iodine
O All above are False.
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A 9.00 L tank at 7.29 °C is filled with 11.5 g of carbon dioxide gas and 3.05 g of dinitrogen monoxide gas. You can assume
both gases behave as ideal gases under these conditions.
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What is the charge on the ion?
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[Review Topics]
[References]
Use the References to access important values if needed for this question.
An ion from a given element has 24 protons and 21 electrons.
What is the symbol for the ion?
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Question 16 of 25
>
Attempt 2
Determine the element symbol, number of protons, and number of electrons for an ion that has a mass number of 56, 30
neutrons, and a charge of +3.
element symbol:
number of protons:
number of electrons:
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SPECIAL
GREEK ALPHABET
36
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Decide which element probably forms a compound with oxygen that has a chemical formula most and least similar to the chemical formula of the compound
formed by oxygen and sodium.
Comparing chemical formula of compound formed with oxygen:
strontium
lithium
phosphorus
barium
most similar to sodium
least similar to sodium
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Barium + water =
ANSWER IN WORDS ONLY!!!
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Chapter 6-HW
Est. Length: 2:00:00
Which of the following is the correct formula for the ionic compound that would
form between calcium and phosphorous?
O a) Ca3 P2
Ob) Ca₂ P3
c) Cap
Arceli Lopez Lopez: Attempt 1
Od) Ca3 P
Oe) Ca₂ P
X
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I Review | Constants | Periodic Table
Particle
Mass
Atomic mass
Electrical charge
Relative
(g)
units
(C)
charge
electron
9.109 x 10-28
0.0005486
-19
-1.602 x 10
- 1
proton
1.673 x 10
24
1.007276
+1.602 × 10-19
+1
neutron
1.675 x 10-24
1.008665
The atomic number Z is the number of protons in the nucleus of an atom of an element Each element has a unique number of protons. For example, an atom with 47
protons is always a silver atom and has an atomic number of 47. The atomic number is used to distinguish different elements from one another.
The mass number A is the sum of the number of protons and neutrons in the nucleus of an atom of an element. Atoms that have the same atomic number but different
mass numbers are called isotopes. For example, all atoms with atomic number 6 are carbon atoms, but carbon atoms with mass numbers of 12 and 13 are isotopes of
one another.
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- Question number 8 pleasearrow_forwardPls help ASAP on all true and false questions.arrow_forwardrome File Edit View History Bookmarks People Tab Window Help * A 19%O HCc Dashboar x E Buy Essay x G find some x © Periodic T X A ALEKS - J x Hcc Chapter 5 x G convert cX A www-awn.aleks.com/alekscgi/x/Isl.exe/1o_u-IgNslkr7j8P3jH-IQİHQRDYV_6Ux63SypJXz0Coxvwqgg4JkWI77rzDGvdXC.. O GASES Jacqueline Using the ideal equation of state S Search jacqueh mail.goo Boron trifluoride gas is collected at -19.0 °C in an evacuated flask with a measured volume of 25.0 L. When all the gas has Profile - been collected, the pressure in the flask is measured to be 0.090 atm . R web.robl Cuteding of the mi Calculate the mass and number of moles of boron trifluoride gas that were collected. Round your answer to 2 significant digits. 副 Virtual E - Roblox web.robl Virtual B group on R mass: g mole: mol Ar Manage M appleid. Your App account nu Explanation Check n2021 McGraw.Hill Education All Rinhts Reserved. Terms of Use Privacy IIarrow_forward
- Please correct answer and don't use hand raitingarrow_forwardme File Edit View History Bookmarks People Tab Window Help * * 5% I Mcc Dashboar x E Buy Essay x G find some x © Periodic T x A ALEKS - J X Mcc Chapter 5 x G convert CX A www-awn.aleks.com/alekscgi/x/Isl.exe/1o_u-IgNslkr7j8P3jH-IQİHqRdYV_6Ux63SypJXz0Coxvwqgg4JkWI74Meq7fCi1Pj. ☆ O GASES Jacqueline Solving for a gaseous reactant S Search r jacqueh mail.goo Combustion of hydrocarbons such as pentane (C,H,2) produces carbon dioxide, a "greenhouse gas." Greenhouse gases in the Earth's atmosphere can trap the Sun's heat, raising the average temperature of the Earth. For this reason there has been a great deal of international discussion about whether to regulate the production of carbon dioxide. Profile R web.robl Cuteding of the mi Virtual E R 1. Write a balanced chemical equation, including physical state symbols, for the combustion of liquid pentane into gaseous carbon dioxide and gaseous water. - Roblox web.robl Virtual B group on olo Manage side M appleid. Your App 2. Suppose 0.200 kg…arrow_forwardarrow_forwardpls help with these questions - 2arrow_forward25 - Which of the followings about Fe(NO3)3 is wrong? O A) total charge in the compound is +2 O B) iron transfer 3 electrons to nitrate groups O C) nitrate ion is -1 charged O D) ionic compound O E) charge of iron is +3arrow_forwardPls help ASAP on all PLS I REQUESTarrow_forwardme File Edit View History Bookmarks People Tab Window Help HCc Dashboar x E Buy Essay x 5% O G find some x © Periodic A ALEKS - J X HUc Chapter 5 x G convert C A www-awn.aleks.com/alekscgi/x/Isl.exe/1o_u-IgNslkr7j8P3jH-IQİHQRDYV_6Ux63SypJXz0Coxvwqgg4JkWI74Meq7fCi1Pj.. O GASES Search Calculating partial pressure in a gas mixture S jacquehr mail.goo Jacqueline Profile - web.robl Cuteding of the mi A 9.00 L tank at 3.36 °C is filled with 13.2 g of boron trifluoride gas and 9.61 g of dinitrogen difluoride gas. You can assume both gases behave as ideal gases under these conditions. R Calculate the mole fraction and partial pressure of each gas, and the total pressure in the tank. Round each of your answers to 3 significant digits. Virtual E R - Roblox web.robl Virtual B group on mole fraction: dh boron trifluoride Manage appleid.a Your App partial pressure: | atm le for account mole fraction: dinitrogen diffluoride ble to partial pressure: ||atm Total pressure in tank: | atm ranscrip…arrow_forwardSolve subparts 10 and 11arrow_forwardQuestion completion Status: What is the symbol of the element in Group 4A(14) and Period 2? C Be Ca Si Mg 00000 QUESTION 26 41 Given the following: 19 X, 39 41 19 X, 20 X, and 41 39 X and X are isotopes of each other. 19 19 O 41 41 X and. X are isotopes of each other, and 19 20 O 41 39 41 X, 39 19 19 20 X, and 18 O None are isotopes of each other. QUESTION 27 39 18 X. Which are isotopes of each other? Valence electrons are electrons located O throughout the atom. in the nucleus of an atom. in the outermost energy level of an atom. in the innermost energy level of an atom. in the first three shells of an atom. 39 X are isotopes of each other. 19 X and 39 18 X are isotopes of each other.arrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
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