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
Kobotan [32]
3 years ago
11

Are these correct ?! Please help !!!!!

Chemistry
1 answer:
julsineya [31]3 years ago
6 0
All part B is right.
You might be interested in
Elements in the same period of the periodic table exhibit similar physical and chemical properties.
Vladimir [108]

Answer:

same valency electrons

Explanation:

example g 1 elements

5 0
2 years ago
Which element is humus especially rich in?<br>oxygen <br>carbon <br>nitrogen <br>or tungsten​
amid [387]

Answer:

Carbon

Explanation:

looked it up

5 0
3 years ago
For alpha decay to cause a loss in mass, such as that in the uranium 238 conversion to thorium 234, what must the atomic weight
Aleonysh [2.5K]

Explanation:

Reaction equation showing alpha decay in Uranium-238 is as follows.

    ^{238}_{92}U \rightarrow ^{234}_{90}Th + ^{4}_{2}He

It is known that an alpha particle is basically a helium nucleus and it contains 2 protons and 2 neutrons.  

Symbol of an alpha particle is ^{4}_{2}\alpha.

As atomic mass or weight is the sum of total number of protons and neutrons present in an atom.

Hence, the atomic weight of the alpha particle is (2 + 2) = 4.

6 0
2 years ago
why do we heat the test tube in a glass beaker during a chemistry experiment and not directly over a flame?
bearhunter [10]
It is not directly over a flame because it depends on the substance you might not want to heat it too much.you never know what could happen
7 0
3 years ago
Valeric acid, HC5H9O2 (Ka = 1.5 ✕ 10−5), is used in the manufacture of magnesium valerate, a nerve-calming agent. What is the hy
Studentka2010 [4]

Answer:

[H^+]=0.00332M

Explanation:

Hello,

In this case, considering the dissociation of valeric acid as:

HC_5H_9O_2 \rightleftharpoons C_5H_9O_2 ^-+H^+

Its corresponding law of mass action is:

Ka=\frac{[H^+][C_5H_9O_2^-]}{[HC_5H_9O_2]}

Now, by means of the change x due to dissociation, it becomes:

Ka=\frac{(x)(x)}{0.737-x}=1.5x10^{-5}

Solving for x we obtain:

x=0.00332M

Thus, since the concentration of hydronium equals x, the answer is:

[H^+]=x=0.00332M

Best regards.

7 0
3 years ago
Other questions:
  • Chose the statements that are TRUE from the list below Group of answer choices Ions exist alone in nature Lactate is created by
    11·1 answer
  • How many cans of dog food must Sam buy for his 3 dogs if each dog eats 2 cans per day? Sam only shops once a week.
    11·1 answer
  • How many different sets of equivalent protons are there for para-xylene (1,4-dimethylbenzene)? only 1 two three four?
    13·1 answer
  • What are conclusions based on?
    10·2 answers
  • How many hydrogen atom are present in 1.53 g of water
    13·1 answer
  • Can someone help me with this question. <br><br> I’ll mark brainliest
    6·1 answer
  • Label the diagram below chapter 2
    15·1 answer
  • Which characteristic do all organisms as share
    11·1 answer
  • Uhm so im kinda not the brightest so halp
    12·1 answer
  • What does the law of multiple proportion account for?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!