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
navik [9.2K]
3 years ago
13

The weather report says that if the temperature drops 10°, it will reach 25° below zero. The current temperature T can be found

by solving the equation T – 10 = –25. Which answer describes the correct method for solving the equation?
Chemistry
1 answer:
Neporo4naja [7]3 years ago
8 0

Answer:

The current temperature is -15° (15° below zero)

Explanation:

The temperature drops 10°:

T-10°

It will reach 25° below zero:

T - 10° = -25°

We add 10° in both members of the equation:

T - 10° +10° = -25° +10°

The equation is simplified as follows:

T = -25° +10°

T = -15°

The integer -15° can be expressed as 15° below zero.

You might be interested in
How do synthesis reactions and a decomposition reactions differ
Minchanka [31]
A synthesis would be A+B-->AB its combining, decomposition is AB-->A+B, its the breaking up of a substance.
8 0
3 years ago
which count of subatomic particles gives an atom its unique identity as an element, and represents its atomic number? a. the num
Arada [10]
The subatomic particles that identifies an element and also represents its atomic number would be A. The number of protons.
7 0
3 years ago
Read 2 more answers
What is the gram formula mass of Ca3(PO4)2
Georgia [21]
Mass Molar of Ca_{3} (PO_4)_2
Ca = 3*40 = 120 amu
P = 2*31= 62 amu
O = (16*4)*2 = 64*2 = 128 amu
--------------------------------------
Mass Molar of Ca_{3} (PO_4)_2 = 120 + 62 + 128 = 310 g/mol

Therefore: <span>What is the gram formula mass of Ca3(PO4)2 ?
</span>Answer: 310 grams
6 0
3 years ago
if 0.0203 g of a gas dissolves in 1.39 l of water at 1.02 atmospheres at what pressure (in atm) would you be able to dissolve 0.
Sergeu [11.5K]
First, we need to get n1 (no.of moles of water ): when

mass of water = 0.0203 g and the volume = 1.39 L

∴ n1 = mass / molar mass of water

        = 0.0203g / 18 g/mol
        = 0.00113 moles

then we need to get n2 (no of moles of water) after the mass has changed:

when the mass of water = 0.146 g

n2 = mass / molar mass

     = 0.146g / 18 g/ mol
     = 0.008 moles

so by using the ideal gas formula and when the volume is not changed:

So, P1/n1 = P2/n2 

when we have P1 = 1.02 atm 

and n1= 0.00113 moles

and n2 = 0.008 moles 

so we solve for P2 and get the pressure

∴P2 = P1*n2 / n1

        =1.02 atm *0.008 moles / 0.00113 moles

       = 7.22 atm

∴the new pressure will be 7.22 atm


5 0
3 years ago
Which is the next logical step in balancing the given equation? 3CO(g) + Fe2O3(s) Fe(s) + 3CO2(g)
Elena-2011 [213]

I believe that the answer is A.

5 0
3 years ago
Read 2 more answers
Other questions:
  • How will the concentration of H+ and OH− ions change when a substance with a pH 11.4 is added to water?
    13·2 answers
  • Matter can totally be created or destroyed.<br><br> True<br> False
    6·1 answer
  • C8H18+ O2&gt; CO2+ H2O how to make this balanced?
    11·1 answer
  • Compare the discoveries of Henri Becquerel with the discoveries of Marie Curie
    9·2 answers
  • Use the accepted values for the molar masses of zinc and gold to determine the mass of gold needed to have the same number of at
    12·1 answer
  • Explain how you determine molar mass of Ca(No3)2
    15·1 answer
  • Pleas help fill in blank
    13·1 answer
  • How is protenin in milk broken down in our digestive system​
    10·1 answer
  • The table compares some characteristics of two atoms.
    15·1 answer
  • Write the symbol of each neutral element based on its written electron configuration:
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!