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melisa1 [442]
3 years ago
11

The fact that the four new elements are Period 7 of the table means that they all

Chemistry
1 answer:
Anna [14]3 years ago
3 0

Answer:

C

Explanation:

form ions with charges of 7+

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Fill in all the grey boxes including the green box. PLEASE HELP
Amiraneli [1.4K]

Answer:

2Na + 2H2O ----> 2NaOH + H2

Explanation:

6 0
3 years ago
If 0.8 g of gas Z occupies 0.56 dm at s.1.p., calculate its relative molecular mass. (Molar volume of gas is 22.4 dm.)​
photoshop1234 [79]

Answer:

32

Explanation:

0.56dm of gas has 0.8g

22.4dm of gas Z has a mass of 22.4/0.56X0.8

the relative molecular mass of gas Z is 32

8 0
3 years ago
A sample of oxygen gas (O2) at STP has a mass of 48.0 grams. What is the volume of the gas?
zvonat [6]
P * V = n R T 
<span>1 * 2.50 = n * 0.082 * 273 = 2. 50 / ( 0.082 * 273 ) = 0.11 mol </span>
<span>mass = mole number * molecular mass </span>
<span>mass = 0.11 * ( 16 * 2 ) = 3.52 g </span>
7 0
3 years ago
The atomic symbol mc025-1.jpg represents potassium-40 (K-40), a radioactive isotope that has 19 protons and 21 neutrons. Which a
otez555 [7]
The answer is a 40/18Ar
6 0
4 years ago
Read 2 more answers
Glycolysis is the process by which energy is harvested from glucose by living things. Several of the reactions of glycolysis are
nika2105 [10]

Answer: Reaction A: pi + glucose ⇒ glucose-6-phosphate + H2O ΔG = 13.8 kJ/mol

Reaction B: pi + frutose-6-phosphate ⇒fructose-1,6-biphosphate + H2O ΔG = 16.3kJ/mol

Explanation: ΔG is the representation of the change in Gibbs Free Energy and relates enthalpy and entropy in a single value, which is:

ΔG = ΔH - TΔS

where:

ΔH is enthalpy

T is temperature

ΔS is entropy (measure of the )

It can also predict the direction of the reaction with the conditions of temperature and pressure being constant.

When the change is positive, the reaction is non-spontaneous, which means the reaction needs external energy to occur. If the change is negative, it is spontaneous, i.e., happens without external help.

Analyzing the reaction, we see that reaction A and B have a positive ΔG, while reaction C is negative, so the reaction that are unfavorable or nonspontaneous are <u>reactions A and B</u>.

6 0
3 years ago
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