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Anon25 [30]
2 years ago
14

?

Chemistry
1 answer:
Verizon [17]2 years ago
6 0

Answer:

D. 4 protons 2 neutrons and 4 electrons

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A chemist wants to examine specific chemical reactions and isolate certain products using a controlled experiment. How would the
professor190 [17]

Answer:

in a laboratory

Explanation:

A controlled experiment refers to the one where everything is an experiment except a single variable is held constant. A collection of information is typically taken as a control group, which is generally the ordinary state, and another group is analyzed( such as chemical reaction as per the question) in which all conditions are similar to the control group except for the variable under examination. The main benefit of a controlled experiment is that confusion over the accuracy of the results can be eliminated more easily.

6 0
3 years ago
Which elements are solid at room temperature
Kryger [21]

Answer:bromine , neon , helium , argon , lithium , beryllium

Explanation:

8 0
3 years ago
1. 17.0 grams of xenon hexafluoride is in a solid container. How many milliliters of that gas
BlackZzzverrR [31]

Answer: The volume of gas is 3020 ml

Explanation:

According to ideal gas equation:

PV=nRT

P = pressure of gas = 821.4 torr =  1.08 atm     (760 torr = 1atm)

V = Volume of gas in L = ?

n = number of moles = \frac{\text {given mass}}{\text {Molar mass}}=\frac{17.0g}{245.28g/mol}=0.069mol

R = gas constant =0.0821Latm/Kmol

T =temperature =302.7^0C=(302.7+273)K=575.7K

V=\frac{nRT}{P}

V=\frac{0.069mol\times 0.0821Latm/K mol\times 575.7K}{1.08atm}=3.02L=3020ml

Thus volume of gas is 3020 ml

4 0
3 years ago
What can be said about an endothermic reaction with a negative entropy change?
zvonat [6]
The statement is false because endothermic reactions have a positive enthalpy change, because heat is being added to the system because it requires more energy to react
6 0
3 years ago
Is phosphorus tribromide a covalent compounds or ionic compounds
daser333 [38]

Phosphorus tribromide is a covalent compound because they share electron pairs.

6 0
3 years ago
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