What is the acceleration that this box will move? (Don't forget your units)
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Answer:
160 I think or 200
Explanation:
the lines are pulling on the same side so you add those
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The density of nitroglycerine is 1.60 g/ml what is the volume in liters of a mole of liquid nitroglycerine
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Answer:
Cu,Sn,Pb,Mg,Ca.Na,K
Explanation:
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The chemical name for Fe(HCO₃)₂ is iron(II) bicarbonate.
Iron (II) compounds typically form coordination complexes with ligands that have a higher affinity for binding to the iron ion. Bicarbonate is a relatively weak ligand and is more commonly found as a component of soluble salts, such as sodium bicarbonate (NaHCO3) or potassium bicarbonate (KHCO3).
In this compound, the iron ion has a +2 charge, and the bicarbonate ion (HCO3-) has a -1 charge. When these ions combine, the resulting compound is named accordingly with the Romannumeral (II) to indicate the iron ion's charge.
To learn more about the chemical name, follow the link:
#SPJ6
Answers
Answer: Convection
Explanation: apex 1/10/2020
C2H5OH(l)+3O2(g)→2CO2(g)+3H2O(l), ΔH = –1367 kJ/mol
C(s)+O2(g)→CO2(g), ΔH = –393.5 kJ
H2(g)+½O2(g)→H2O(l), ΔH = –285.8 kJ
a. -277.6 kJ/mol
b. -194.7 kJ/mol
c. 194.7 kJ/mol
d. 486 kJ/mol
Answers
Answer:
The answer is a. -277.6 kJ/mol
Explanation:
We have to arrange and sum the given equations to obtain the desired reaction as follows:
3 H₂O(l) + 2 CO₂(g) → 3 O₂(g) + C₂H₅OH(l) ΔH1= (-1) x (-1367 KJ/mol)
2 C(s) + 2 O₂(g)→ 2 CO₂(g) ΔH2= 2 x (-393.5 KJ/mol)
3 H₂(g) + 3/2 O₂(g) → 3 H₂O(l) ΔH3= 3 x (-285.8 KJ/mol)
In the first equation (ΔH1) , we multiply the enthalphy by (-1) because we use the reverse reaction. In the second and third equations (ΔH2 and ΔH3), we multiply by 2 and 3, respectively. Once we sum and cancel the terms that are repeated in both sides of the reactions, we obtain:
3H₂(g) + 2C(s) + ½O₂(g) → C₂H₅OH(l)
The total enthalphy is:
ΔH= ΔH1 + ΔH2 + ΔH3
ΔH= (-1) x (-1367 KJ/mol) + 2 x (-393.5 KJ/mol) + 3 x (-285.8 KJ/mol)
ΔH= -277.4 KJ/mol
The nearest answer between the given options is option a (-277.6 KJ/mol)
B. Soda mixed with the pizza sauce and sped up digestive enzyme activity.
C. Soda raised the pH in his stomach and sped up digestive enzyme activity.
D. Soda lowered the pH in his stomach and slowed digestive enzyme activity.
2. Which factor decreases the rate of a chemical reaction?
A. An inhibitor
B. A co-factor
C. Increased substrate
D. Cold temperature
3. Which component decreases the activation energy of a chemical reaction?
A. An inhibitor solution
B. Presence of an enzyme
C. Lower substrate concentration
D. Neutral pH levels
4. A biologist adds a vitamin solution to an enzyme/substrate solution that requires co-factors. What will happen to the substrate?
A. The vitamins will bond to the enzymes and increase their reactivity with the substrates.
B. The vitamins will bond to the enzymes and decrease their reactivity with the substrates.
C. The substrate molecules will bond to the vitamin molecules and inhibit bonding of the enzyme.
D. The substrate molecules will bond to the vitamin molecules and stimulate bonding of the enzyme.
5. Jennifer stews peaches to make peach jelly. She believes the homemade jelly will make a healthy treat full of vitamins and enzymes her body needs. Which of the following disproves her prediction?
A. The peaches don't contain enzymes.
B. The jelly has too much sugar to be healthy.
C. The enzymes in the peaches have denatured.
D. The vitamins in the peaches will inhibit the enzymes.
6. What statement best describes what happens during the catalytic cycle?
A. The enzyme breaks the substrate apart to prepare for the reaction.
B. The enzyme positions the substrate to increase access during a reaction.
C. The substrate uses enzyme energy to start the reaction.
D. The active site releases the substrate and replaces it with an inhibitor.
Answers
Answer 1) Option D) Soda lowered the pH in his stomach and slowed digestive enzyme activity.
Explanation : Consuming soda after eating pizza lowered the pH of the stomach which consequently, slowed the digestive enzyme activity in the stomach. The enzymes actively digest the food only in highly acidic environment.
Answer 2) Option A) An inhibitor
Explanation : An inhibitor is a substance usually added to a progressing chemical reaction to decrease the rate of reaction and finally stop the reaction.
Answer 3) Option B) Presence of an enzyme
Explanation : When an enzyme is added to a chemical reaction it is often seen that it lowers the energy of activation and catalyzes the reaction. So, enzyme acts as a catalyst and increases the reaction rate.
Answer 4) Option A) The vitamins will bond to the enzymes and increase their reactivity with the substrates.
Explanation : When the biologists adds a vitamin solution to an enzyme or a substrate solution the bonding will take place between vitamins and enzymes and as a result it will increase the reactivity of the substrates.
Answer 5) Option C) The enzymes in the peaches have denatured.
Explanation : When enzymes are stewed or rather boiled they become denatured and the bonds between them breaks, which makes the enzyme useless. Hence, proteins should be eaten raw without boiling at higher temperatures.
Answer 6) Option A) The enzyme breaks the substrate apart to prepare for the reaction.
Explanation : In a catalytic reaction the enzymes usually break the substrate and create more surface area for the reaction to occur.
2) A
3) B
4) A
5) C
6) A
number of protons
number of neutrons
number of valence electrons
Answers
Also, From left side-Right side of the periodic is in the following order - Alkali Metals, Alkali Earth Metals, Halogens then Noble gases in the Far right of the periodic table