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
SCORPION-xisa [38]
3 years ago
7

Can someone help me im doing chemistry right now and I have a question which I have no idea how to solve and I need to show work

it it needs to be shown in scientific notation
(7.6x10^-1)+(2.0x10^-2)
Chemistry
1 answer:
dexar [7]3 years ago
6 0
The answer should be 0.78
You might be interested in
Quantum numbers arise naturally from the mathematics used to describe the possible states of an electron in an atom. The four qu
ad-work [718]

Answer:

The allowable values for the principle quantum number (n) are integers greater than zero.

The allowable values for the angular momentum quantum number (l) are integers from 0 to n-1.

The allowable values for the magnetic quantum number (ml) are integers from -l to l.

The allowable values for the spin quantum number (ms) are -1/2 and 1/2.

Explanation:

<em>Identify allowable combinations of quantum numbers for an electron. Select all that apply.</em>

  • <em>The allowable values for the principle quantum number (n) are integers greater than zero. </em>TRUE. The principal quantum number (n) represents the level of energy in which an electron is and can take positive integer values.
  • <em>The allowable values for the angular momentum quantum number (l) are integers from 0 to n-1.</em> TRUE. The angular quantum number (l) represents the sublevel of energy and the kind of orbital an electron is in and can take integer values from 0 to n-1. For instance, if n = 1, l can take the value "0", which represents the sublevel and orbital "s".
  • <em>The allowable values for the magnetic quantum number (ml) are integers from -l to l.</em> TRUE. The magnetic quantum number (ml) represents the orientation of an orbital in space and can take integers values from -l to +l. For instance, if l = 1 (p orbital), ml can take the values -1, 0 and 1, which refer to orbitals px, py and pz.
  • <em>The allowable values for the spin quantum number (ms) are -1/2 and 1/2. </em>TRUE. The spin quantum number (ms) represents the spin of the electron and can take values -1/2 and +1/2.
5 0
3 years ago
What volume of 12 M HCl solution is needed to make 2.5 L of 1.0 M HCI?
Jlenok [28]

Answer:

0.21 L of 12 M HCL

Explanation:

CV=CV

(12)(x)=(1.0)(2.5)

x=0.21

8 0
3 years ago
You are carefully watching the temperature of your melting point apparatus as it is heating up. At 132 C it is still a white sol
Lisa [10]

Answer:

See the answer below

Explanation:

<em>Since the experiment is set out to determine the melting point of the white solid, after missing the melting point due to distraction, there are two possible solutions and both involves a repeat of the experiment.</em>

1. The first one is to allow the molten substance to solidify again and then repeat the experiment. This time around, a critical attention should be paid to be able to notice the melting point temperature once the temperature gets to 132 C.

2. The second solution would be discard the molten substance and repeat the experiment with the a new solid one. Similarly, critical attention should be paid once the temperature gets to 132 C since it is sure that the melting point lies within 132 and 138 C.

6 0
3 years ago
What is the difference between the units rem and rad?
LenKa [72]

Answer:

Rem is used to measure biological risk, and rad is used to measure absorbed radiation.

Explanation:

6 0
3 years ago
You’re sitting at a car race and the cars sound differently when they approach as opposed to when they are moving away. Why migh
bulgar [2K]

Answer:

I have no clue this qestion is kinda stumping but it a really good question it got me thinking but i don't know if there is a right answer

Explanation:

I don't know

5 0
2 years ago
Other questions:
  • Why is it important to determine the qcalorimeter before determining the qmetal?
    14·2 answers
  • Which statement is true? Inertia causes bodies to slow in their motion, unless they’re pushed by a force. Inertia resists change
    9·2 answers
  • What kind of waves do cellar telephones use to transmit amend recive signals
    9·1 answer
  • About 20-25% of the 92 natural elements are known to be essential to life. which four of these elements make up approximately 96
    15·1 answer
  • What is the mass number of an atom that has 12 neutrons and 11 protons?<br> 24<br> 12<br> 11<br> 23
    12·1 answer
  • A bond formed when atoms share electrons is a(n) __________.
    6·1 answer
  • What is the amount of heat required to complete MELT a 200 gram sample of H2O(s)
    8·2 answers
  • For the reaction of reducing benzil (MW 210.23 g/mol) with sodium borohydride (MW 37.83 g/mol), if 2.56 g of benzil and 0.38 g o
    14·1 answer
  • If different masses of water are heated to the same temperature, which sample will absorb more energy? Base your argument on the
    12·1 answer
  • The type of research in which one variable is changed to see its effect is:
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!