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Nimfa-mama [501]
3 years ago
15

Practice It!

Chemistry
2 answers:
ASHA 777 [7]3 years ago
5 0
^ this guy is right.
Ostrovityanka [42]3 years ago
4 0

Answer:

Explanation:

Space exploration technology has helped us explore the Moon and see images of far off galaxies.

Space technology may help us inhabit another planet or live in space in the future.

These are the correct statements

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How much atp is produced from a single glucose molecule in each reaction set?
Allisa [31]

Answer:

C. ETC produces 34, Krebs cycle produces 2, glycolysis produces 2.

Explanation:

<em>Glycolysis </em>

G ⟶ G6P                        -1ATP

F6P ⟶ FBP                    -1ATP

2×[1,3-BPG ⟶ 3-PG]     <u>+4ATP                  </u>

Net =                                                2ATP

<em>Krebs Cycle</em>

2×[succinyl-CoA ⟶ succinate]      2ATP

<em>ETC</em> =                                             34ATP

6 0
4 years ago
A sample of oxygen gas at a pressure of 1.19 atm and a temperature of 24.4 °C, occupies a volume of 18.7 liters. If the gas is a
mihalych1998 [28]

Answer:

\boxed {\boxed {\sf 0.757 \ atm}}

Explanation:

We are asked to find the pressure of a gas given a change in volume. Since the temperature remains constant, we are only concerned with volume and pressure. We will use Boyle's Law, which states the volume is inversely proportional to the pressure. The formula for this law is:

P_1V_1= P_2V_2

Initially, the oxygen gas occupies a volume of 18.7 liters at a pressure of 1.19 atmospheres.

1.19 \ atm * 18.7 \ L = P_2V_2

The gas expands to a volume of 29.4 liters, but the pressure is unknown.

1.19 \ atm * 18.7 \ L = P_2 * 29.4 \ L

We are solving for the new pressure, so we must isolate the variable P_2. It is being multiplied by 29.4 liters. The inverse operation of multiplication is division. Divide both sides of the equation by 29.4 L.

\frac {1.19 \ atm * 18.7 \ L}{29.4 \ L} =\frac{ P_2 * 29.4 \ L}{29.4 \ L}

\frac {1.19 \ atm * 18.7 \ L}{29.4 \ L} =P_2

The units of liters cancel.

\frac {1.19 \ atm * 18.7 }{29.4 } =P_2

\frac {22.253}{29.4 } \ atm = P_2

0.7569047619 \ atm =P_2

The original measurements all have 3 significant figures, so our answer must have the same. For the number we calculated, that is the thousandth place. The 9 in the ten-thousandth place to the right of this place tells us to round the 6 up to a 7.

0.757 \ atm \approx P_2

The pressure of the gas sample is approximately <u>0.757 atmospheres.</u>

3 0
3 years ago
Read 2 more answers
What is the best name for the following compound? CCl4
Nitella [24]

Answer:

The answer is b. Carbon Tetrachloride

Explanation:

Let's discard the other options:

a. It couldn't be carbon chloride because there are four (4) chloride ions in the molecular formula. The molecular formula for the carbon chloride must be CCI. So, this answer is wrong

c. It could be monocarbon tetrachloride because there are 4 chloride ions and 1 carbon ion, but it's not necessary to use the prefix "mono" because there is just one carbon ion in the formula. In that way, when we mention carbon in the name, there is implicit that there is just one carbon atom in the formula. So, this answer could be ok, but isn't the best.

d. It couldn't be calcium chloride because there isn't any calcium ion or atom in the formula. The molecular formula for the calcium chloride must be CaCI. So, this answer is wrong

6 0
4 years ago
What could change the aquarium system?
Sphinxa [80]

Answer:

Removing the dirty water and replacing with fresh water. also the fish containing in the aquarium change the system of aquarium.

4 0
2 years ago
What would you observe when zinc is added to solutions of iron II sulphate? write the chemical reaction that takes place.​
kompoz [17]

Answer:

When zinc is added to the solution of iron sulphate, the colour of iron sulphate solution changes. It is because zinc is more reactive than iron, it displaces iron from its solution of iron sulphate and a grey precipitate of iron and a colourless solution of zinc sulphate is formed.

Explanation:

Zn(s) + FeSO4(aq) -----> ZnSO4(aq) + Fe(ppt.)

8 0
3 years ago
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