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julia valdez

julia v.

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Viewed Questions

Match the molecules with the best description.
$$ \text {protein } \quad \quad \text {a. phosphate, fatty acids} $$
$$ \text {phospholipid } \quad \quad \text {b. amino acids, sugar(s)} $$
$$ \text {glycoprotein} \quad \quad \text {c. glycerol, fatty acids} $$
$$ \text {fat } \quad \quad \text {d. nucleotides} $$
$$ \text {nucleic acid} \quad \quad \text {e. glucose onlys} $$
$$ \text {cellulose } \quad \quad \text {f. sugar, phosphate, base} $$
$$ \text {nucleotide} \quad \quad \text { g. amino acids} $$
$$ \text {Sucrose} \quad \quad \text {h. glucose, fructose} $$

Match the molecules with the best description. $$ \text {protein } \quad \quad \text {a. phosphate, fatty acids} $$ $$ \text {phospholipid } \quad \quad \text {b. amino acids, sugar(s)} $$ $$ \text {glycoprotein} \quad \quad \text {c. glycerol, fatty acids} $$ $$ \text {fat } \quad \quad \text {d. nucleotides} $$ $$ \text {nucleic acid} \quad \quad \text {e. glucose onlys} $$ $$ \text {cellulose } \quad \quad \text {f. sugar, phosphate, base} $$ $$ \text {nucleotide} \quad \quad \text { g. amino acids} $$ $$ \text {Sucrose} \quad \quad \text {h. glucose, fructose} $$

Biology Today and Tomorrow with Physiology

The element bromine is distributed between
two isotopes. The first, amounting to
$50.69 \%,$ has a mass of 78.918 amu. The
second, amounting to 49.31$\%$ , has a mass of
80.916 amounting to $49.31 \%,$ has a mass of
mass of bromine.

The element bromine is distributed between two isotopes. The first, amounting to $50.69 \%,$ has a mass of 78.918 amu. The second, amounting to 49.31$\%$ , has a mass of 80.916 amounting to $49.31 \%,$ has a mass of mass of bromine.

Holt Chemistry

Bromine has two naturally occurring isotopes; ${ }^{79} \mathrm{Br}$ (mass of 78.918 ) and ${ }^{81} \mathrm{Br}$ (mass of 80.916 ). If the atomic weight of bromine is 79.904 , predict the mass spectrum of a sample of bromine atoms. $(\mathrm{LO} 2.17)$

Chemistry

When an acid name ends in -ic acid, there is often a related acid whose name ends in -ous acid. The formula of the $-$ ous acid has one fewer oxygen atom than that of the $-i c$ acid. With this information, write formulas for (a) sulfurous acid and (b) selenous acid.

When an acid name ends in -ic acid, there is often a related acid whose name ends in -ous acid. The formula of the $-$ ous acid has one fewer oxygen atom than that of the $-i c$ acid. With this information, write formulas for (a) sulfurous acid and (b) selenous acid.

Chemistry for Changing Times

Questions asked

INSTANT ANSWER

Copper metal can be produced by heating copper(II) oxide and hydrogen gas (the other product of this reaction is water). If the enthalpy of reaction () for this reaction is +130.5 kJ, calculate the heat of reaction for producing 200 g of copper metal

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ANSWERED

If the heat of formation of sodium chlorate is –53 kJ/mol, then the heat of reaction for 3 mol of sodium chlorate is Question 6 options: 17.7 kJ none of the selections –159 kJ –17.7 kJ 159 kJ

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INSTANT ANSWER

Which of the following reactions is exothermic? Question 5 options: H2O(g) ®H2(g) + 1/2 O2(g) – ΔH = –243 kJ/mol 1/2 N2(g) + 1/2 O2(g) + 90.7 kJ ® NO(g) CO(g) + 111 kJ® C(s) + 1/2 O2(g) 1/2 H2(g) + 1/2 I2(g) ® HI(g) ΔH = +26 kJ/mol H2(g) + 1/2 O2(g) ® H2O(g) ΔH = –243 kJ/mol

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INSTANT ANSWER

Which statement concerning the Law of Conservation of Energy is not true? Question 4 options: it includes potential energy it applies to nuclear reactions it applies to all chemical changes it involves heat content of substances it involves all different forms of energy

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INSTANT ANSWER

A chemical system in which matter nor energy can flow into or out of a system is described as Question 3 options: an open system a chemical system an isolated system none of the selections a closed system

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INSTANT ANSWER

What is another way to write the following equation? C2H6(g) ® C2H2(g) + 2H2(g) ΔH = 3.2 ´ 102 kJ/mol Question 2 options: C2H6(g) + 3.2 ´ 102 kJ ® C2H2(g) + 2H2(g) C2H6(g) – 3.2 ´ 102 kJ ® C2H2(g) + 2H2(g) 2H2(g) + C2H2(g) + 3.2 ´ 102 kJ ® C2H6(g) C2H6(g) ® C2H6(g) + 2H2(g) + 3.2 ´ 102 kJ none of the selections

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INSTANT ANSWER

The heat released during the combustion of C3H8(g) (propane) to produce CO2(carbon dioxide) gas and water vapour is 2222 kJ/mol of C3H8(g). Which of the following is the correct chemical equation for the reaction? Question 1 options: C3H8(g) + 5O2(g) ® 3CO2(g) + 4H2O (g) DH = +2222 kJ C3H8(g) + 5O2(g) + 2222 kJ ® 4H2O (g) + 3CO2(g) 3CO2(g) + 4H2O(g) ® 5O2(g) + C3H8(g) DH = –2222 kJ C3H8(g)+ 5O2(g) ® 3CO2(g) + 4H2O (g) + 2222 kJ

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ANSWERED

Akeila Weeks verified

Numerade educator

Which of the following is NOT a vital sign? • Blood pressure Lung capacity O Body mass index ) Heartrate

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ANSWERED

Katlin Koehn verified

Numerade educator

The atrioventricular (AV) node controls the contraction of the left & right atriums of the heart. • True O False

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ANSWERED

Donya Dobbin verified

Numerade educator

15 m 9 m 8 m

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