1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
saveliy_v [14]
3 years ago
10

PLEASE HELP 30 POINTS PLS PLS

Chemistry
1 answer:
joja [24]3 years ago
8 0
22-yes, they belong to the same group
23- they are metals
24-Atoms of group 1 elements all have one electron in their outer shell. This means Na and K have the same valence electrons.
25-Metals are solids at room temperature, therefore Na and K are solid.
26- mass number=A=235
Protons=z=92
Neutrons=mass number-protons
Neutrons=A-Z
Neutrons=235-92
Neutrons=143
You might be interested in
Approximately how many atoms make up 2.3 moles of gallium?
Len [333]
I think its b I think
5 0
3 years ago
How many moles are in 65 g of carbon dioxide (CO2)?
ella [17]

The answer is 44.0095. We assume you are converting between grams CO2 and mole.
3 0
3 years ago
Read 2 more answers
Based on the information in the graph, what is the relationship between air temperature and the amount of water vapor that the a
NeTakaya

Answer:

1 i think

Explanation:

5 0
3 years ago
sample of atmospheric gas collected at an industrial site is stored in a 250 mL amber glass bottle that has a pressure of 1.02 a
Nady [450]

Answer:- New pressure is 0.942 atm.

Solution:- The volume of the glass bottle would remain constant here and the pressure will change with the temperature.

Pressure is directly proportional to the kelvin temperature. The equation used here is:

P_1T_2=P_2T_1

Where, T_1 and T_2 are initial and final temperatures, P_1 and P_2 are initial and final pressures.

T_1 = 20.3 + 273.15 = 293.45 K

T_2 = -2.0 + 273.15 = 271.15 K

P_1 = 1.02 atm

T_2  = ?

Let's plug in the values in the equation and solve it for final pressure.

1.02atm(271.15K)=P_2(293.45K)

P_2=\frac{1.02atm*271.15K}{293.45K}

P_2 = 0.942 atm

So, the new pressure of the jar is 0.942 atm.


5 0
4 years ago
Jose times how long sugar takes to dissolve in warm water. he conducts four trials of his experiment. what should he conclude fr
mylen [45]

He can conclude that his experiment has very low precision.

<h3>What is Precision ?</h3>

Precision is defined as the degree of refinement with which an operation is performed or a measurement .

Precision is how close the exact answers are together.

As, the answers are increasing in time.

None of the answers are similar to one another.

Hence, He can conclude that his experiment has very low precision.

Learn more about Precision here ;

brainly.com/question/27845433

#SPJ1

7 0
2 years ago
Other questions:
  • If nitrogen and hydrogen combine in a synthesis reaction, what would the product of the reaction be? n2 + 3h2 → 3
    5·2 answers
  • The atomic number of arsenic is 33 what is the electron configuration
    13·1 answer
  • Two scientists work together on an experiment
    9·1 answer
  • Complete and balance the following redox equation using the set of smallest whole-number coefficients. Now sum the coefficients
    5·1 answer
  • How many molecules of CO2 will be produced by the decomposition
    14·1 answer
  • What Le Chatelier’s factors cause an increase in the concentration of Hb(CO)4(aq) in the Hb(CO)4(aq) + 4O2(g)Hb(O2)4(aq) + 4CO(g
    14·1 answer
  • What is the molar ratio between carbon dioxide to water?<br> 2 C4H10 + 13 O2 = 8 CO2 + 10 H2O
    10·1 answer
  • Polly did on experiment with marbles in a glass
    7·2 answers
  • How many grams are in 6 moles of MgCl2?
    6·1 answer
  • How many sigfigs does 50 have?<br> pls explain why
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!