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Calculate the mass of glucose (C,H,,0,) that contains a trillion (1.0 x 102) oxygen atoms.
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by mining gold from the ocean?
Measurements show that 1.0 g of iron (Fe) contains 1.1 × 10²² Fe atoms. How
many Fe atoms are in 4.9 g of Fe, which is the total amount of iron in the body of
an average adult?
The thin outer layer of Earth, called the crust, contains only 0.50% of Earth's total
mass and yet is the source of almost all the elements (the atmosphere provides
elements such as oxygen, nitrogen, and a few other gases). Silicon (Si) is the second
most abundant element in Earth's crust (27.2% by mass). Calculate the mass of
silicon in kilograms in Earth's crust. (The mass of Earth is 5.9 × 10²¹ tons.
1 ton = 2000 lb; 1 lb = = 453.6 g.)
Page 37
The radius of a copper (Cu) atom is roughly 1.3 × 10−¹0 m. How many times can
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some ionic compounds
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name of compound
Co
3+
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10,
Zn2+
Bro
Ba2+
PO
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e Interactive: Organ S.
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COURSES
GROUPS
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Learning Cycle 1 Assessment Unit 4
True or false - The only way to charge an object with static electricity is by rubbing it against another object.
O True
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1
3
4
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O CHEMICAL REACTIONS
Calculating molarity using solute moles
A chemist prepares a solution of mercury(II) iodide (HgI₂) by measuring out 0.0161 μmol of mercury(II) iodide into a 300. mL volumetric flask and filling the
flask to the mark with water.
Calculate the concentration in μmol/L of the chemist's mercury(II) iodide solution. Round your answer to 3 significant digits.
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How many grams of KOH are present in 30.0 mL of a 7.39 M KOH solution?
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a MYKALE MCBROOM - Kami+Export+-+ROSEMARIE+SIBLEY+-+Kami+Export+-+WKS001 002 19
Section 2: Practicing equation balancing
Before you can write a balanced equation for a problem which asks you to
predict the products of a reaction, you need to know how to balance an equation.
Because some of you may not fully remember how to balance an equation, here
are some practice problems:
1)
C6H6 +
O2 >
H2O +_ CO2
2)
Nal +
Pb(SO4)2 →
Pbl4 +
NazSO4
3)
NH3 +
O2 →_ NO +
H20
4)
Fe(OH)3 >
Fe2O3 +
H20
5)
HNO3 +
Mg(OH)2 →_H2O +
Mg(NO3)2
6)
H3PO4 +
NaBr →
HBr +
Na3PO4
7)
C+H2 → _ C3H3
8)
СаО +
Mnl4 .
MnO2 +
Cal2
9)
Fe2O3 +
H20 >
Fe(OH)з
10)
C2H2 +_ H2 → _ C2H6
11)
VFs+ HI
V2l10 +
HF
12)
OsO +
PtCla
PtO +
OsCla
DELL
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O STATES OF MATTER
Finding mass or volume from percent concentration
0/5
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Lidocaine, a widely used local anesthetic, is available as a 0.50 %(w/v) solution for injection.
Calculate the volume of this solution that contains 90. mg of lidocaine. Be sure your answer has a unit Symbol and is rounded to the correct number of
significant digits.
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Calculating dG from dH and dS
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A chemical engineer is studying the two reactions shown in the table below.
In each case, he fills a reaction vessel with some mixture of the reactants and products at a constant temperature of 53.0 °C and constant total pressure. Then,
he measures the reaction enthalpy AH and reaction entropy AS of the first reaction, and the reaction enthalpy AH and reaction free energy AG of the second
reaction. The results of his measurements are shown in the table.
Complete the table. That is, calculate AG for the first reaction and AS for the second. (Round your answer to zero decimal places.) Then, decide whether, under
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Section 1: Identify the type of reaction
For the following reactions, indicate whether the following are examples of
synthesis, decomposition, combustion, single displacement, double
displacement, or acid-base reactions:
1)
Na3PO4 + 3 KOH → 3 NAOH + K3PO4
2)
MgCl2 + LizCO3 → M9CO3 + 2 LİCI
3)
C6H12 + 9 O2 → 6 CO2 + 6 H20
4)
Pb + FeSO4 → PBSO4 + Fe
5)
CaCO3 → CaO + CO2
6)
P4 + 3 O2 → 2 P203
7)
2 RBNO3 + BeF2 → Be(NO3)2 + 2 RbF
8)
2 AGNO3 + Cu → Cu(NO3)2 + 2 Ag
9)
C3H6O + 4 O2 → 3 CO2 + 3 H20
10)
2 CSH5 + Fe→ Fe(CSH5)2
11)
SeCle + O2 → SeO2 + 3CI2
12)
2 Mgl2 + Mn(SO3)2 → 2 M9SO3 + Mnl4
13)
O3 0 + O2
DELL
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Terms of Use **************** D 1/5 www Jessi Privacy Center | Accessibilityarrow_forward(9.29 × 105/8)-20.81 = with correct sig figsarrow_forward- Chapte x 6 Questio x G "How m X O Chem C x E R.12 ML x A Frequen x E Advanc x * Google x E R.12 ezto.mheducation.com/ext/map/index.html? con=con&external browser%3D0&launchUrl=https%253A%252F%252Flms.mheducation.com%252 Saved apter 4 Assignment 13 3 attempts left Check my work Enter your answer in the provided box. How many grams of KOH are present in 30.0 mL of a 7.39 M KOH solution? ts g eBook Print ferencesarrow_forwardWhy is this correct?arrow_forwarding Signup x Chegg Expert Hiring | Complet X Zoho Creator - Chegg Expert H X C Engagement Terms & Conditio x C F experthiring.cheggindia.com/#Form:Subject_test?privateLink=bF53Pq3tqOdXDb6qq0PKbXBKnU6s212F4b2fdONuXXgZX2DTmglz56E ceeling rembuirsment - Go.. | team M FW: Alstom- Intervi... rt Hiring ditions What product will be obtained when the below compound is heated? heat (B) (A)arrow_forwardS Test on Balancing | Schoology x K MYKALE MCBROOM-Kami+Ex x S Lab Report no.3: Lesson 1: Wh 1.com/web/viewer.html?document_identifier%3DbljwyGCQs_tEmrlX0nGCWL2C44xHXPP5BAua4FHUTrfdZrdUyzo G iready - Google Sea.. S Warm up Wednesd. a MYKALE MCBROOM - Kami+Export+-+ROSEMARIE+SIBLEY+-+Kami+Export+-+WKS001 002 19 Section 2: Practicing equation balancing Before you can write a balanced equation for a problem which asks you to predict the products of a reaction, you need to know how to balance an equation. Because some of you may not fully remember how to balance an equation, here are some practice problems: 1) C6H6 + O2 > H2O +_ CO2 2) Nal + Pb(SO4)2 → Pbl4 + NazSO4 3) NH3 + O2 →_ NO + H20 4) Fe(OH)3 > Fe2O3 + H20 5) HNO3 + Mg(OH)2 →_H2O + Mg(NO3)2 6) H3PO4 + NaBr → HBr + Na3PO4 7) C+H2 → _ C3H3 8) СаО + Mnl4 . MnO2 + Cal2 9) Fe2O3 + H20 > Fe(OH)з 10) C2H2 +_ H2 → _ C2H6 11) VFs+ HI V2l10 + HF 12) OsO + PtCla PtO + OsCla DELLarrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
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