CHEMISTRY HIGH SCHOOL

Bacteria are smaller than viruses.

True

False

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Answers

Answer 1
Answer:

Answer:

false

Explanation:

Related Questions

This malleable metal has an atomic number of 79
Which of the following instruments is used to measure air pressure? A. Thermometer B. Barometer C. Hygrometer D. Anemometer
Cobalt (Co) has an atomic mass of 59 and an atomic number of 27. Which statement correctly describes an atom of cobalt?A. An atom of cobalt contains more neutrons than protons. B. An atom of cobalt contains more electrons than protons. C. An atom of cobalt contains the same number of neutrons and protons. D. An atom of cobalt contains the same number of neutrons, electrons and protons.
Which of these traits does not cause a change in the reaction rate? A. density B. temperature C. concentration D. particle size
The molar mass of carbon dioxide (CO2) is 44.01 g/mol. The molar mass of water (H2O) is 18.01 g/mol. A reaction uses 528 g of CO2. How many moles of water are used in this reaction?

A catalyst works by(1) increasing the potential energy of the reactants(2) increasing the energy released during a reaction(3) decreasing the potential energy of the products(4) decreasing the activation energy required for a reaction

Answers

Answer: Option (4) is the correct answer.

Explanation:

Activation energy is the minimum amount of energy required by reactant molecules to undergo a chemical reaction.

Whereas a catalyst is defined as the substance that helps in increasing the rate of reaction by decreasing the activation energy without itself getting consumed in the reaction.

When a catalyst decreases the activation energy then molecules with lesser energy become able to participate in the reaction and thus, products are obtained at a faster rate. Hence, a catalyst increases the rate of a reaction.

Thus, we can conclude that a catalyst works by decreasing the activation energy required for a reaction.
The catalyst (4) decreases the activation energy required for a reaction, by holding reactants in place

How much heat energy is required to raise the temperature of 0.368 kg of copper from 23.0 ∘C to 60.0 ∘C? The specific heat of copper is 0.0920 cal/(g⋅∘C)

Answers

23.0 + 60.0 = 83.0° C heat energy is required to raise

How much energy (in Joules) would it take to warm 3.11 grams of gold by 7.7 oC(specific heat capacity of gold = 0.130 J/g °C)

Answers

Answer:

It would take 3.11 J to warm 3.11 grams of gold

Explanation:

Step 1: Data given

Mass of gold = 3.11 grams

Temperature rise = 7.7 °C

Specific heat capacity of gold = 0.130 J/g°C

Step 2: Calculate the amount of energy

Q = m*c*ΔT

⇒ Q = the energy required (in Joules) = TO BE DETERMINED

⇒ m = the mass of gold = 3.11 grams

⇒ c = the specific heat of gold = 0.130 J/g°C

⇒ ΔT = The temperature rise = 7.7 °C

Q = 3.11 g * 0.130 J/g°C * 7.7 °C

Q = 3.11 J

It would take 3.11 J to warm 3.11 grams of gold

A solid is cooled to a very low temperature assuming the mass remains constant how if at all does this affect the density of the solid?

Answers

Temperature is related to the kinetic energy the atoms within any givensubstance. Within a solid, we can therefore assume that the density willincrease as the solid is cooled to a low temperature, as this willcause a loss in kinetic energy and the atoms won't be able to move asfreely.

Which compound is an electrolyte? 1. H2O 2. C2H6 3. H3PO4 4. CH3OH

Answers

An electrolyte is a substance that releases ions when it is dissolved in water. Electrolytes are divided into salts, ions and bases. In this case, the electrolyte is H₃PO₄ as it releases H+ ions and PO₄⁻³ ions when it is dissolved in water.

The electrolyte is H₃PO₄, this is because it releases H⁺ ions and PO₄⁻³ ions when it is dissolved in water

What is an electrolyte?

In chemistry, an electrolyte is a substance that has the capacity of conducting electric current by dissociating into positively and negatively charged ions, which migrate to the cathode and anode of an electric circuit, respectively.

  • Electrolyte releases ions when it is dissolved in water.

From the given information;

The electrolyte is H₃PO₄, this is because it releases H⁺ ions and PO₄⁻³ ions when it is dissolved in water.

Learn more about electrolytes here:

brainly.com/question/1708976

How many moles of carbon dioxide is produced when 10.4 mol of propane gas is burned in excess oxygen?a. 0.288 mol
b. 3.46 mol
c. 31.2 mol
d. 52.0 mol
just the letter

Answers

The number moles of carbon dioxide 31.2 moles will be produced when 10.4 mol of propane gas is burned in excess oxygen.

What is moles?

A mole would be the amount of a material that includes exactly 6.02214076 × 10^(23) of the particular chemical elementary constituents.

It is known that the formula of propane is C_(3)H_(8).

The chemical reaction of propane.

C_(3)H_(8) + 5O_(2) → 3CO_(2) +4H_(2)O

It can be understand that, the ratio of propone and carbon di-oxide is 1:3.

The moles of propane = 10.4 mol

So, number of moles of CO_(2) = 10.4 mol × 3 =31.2 mol.

Therefore, the number of moles of carbon di-oxide will be 31.2

Hence, the correct answer will be option (C).

To know more about moles.

brainly.com/question/26416088

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The formula of propane is C3H8. The reaction equation is C3H8 + 5O2 = 3CO2 + 4H2O. So the ratio of mol number of propane and CO2 is 1:3. So the CO2 has 10.4*3=31.2 mol. So the answer is c.
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