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
seraphim [82]
2 years ago
9

I don't quite understand it

Chemistry
1 answer:
irina1246 [14]2 years ago
6 0
So, you need to have same ammount of atoms on the left and on the right side of the equation. You need to count the ammount of attoms of every substance on the left, and make sure that on the right side the ammount is same. For example in the 1st one it’s 6Sn+2P4=2Sn3P4, so that you have 6atoms of Sn on the left and 6 atoms of Sn on the right, same with the P
You might be interested in
Calculate the amount of heat required to raise the temperature of a 65-g sample of water from 32 ∘C to 65 ∘C. (The specific heat
dsp73

The amount of heat required is 9.0 kJ.

<em>q = mC</em>Δ<em>T </em>

Δ<em>T</em> = <em>T</em>_f – <em>T</em>_i = 65 °C – 32 °C = 33 °C

<em>q</em> = 65 g × 4.184 J·°C⁻¹g⁻¹ × 33 °C = 9000 J = 9.0 kJ

8 0
3 years ago
Read 2 more answers
A 100. mL volume of 0.800 M calcium chloride is mixed with 400. mL of water to make 500. mL of solution. What is the final molar
strojnjashka [21]

Answer:

0.99mol/L

Explanation:

Molarity ( M) = # of moles of solute / volume of solution (L)

Volume of Solution = 100 mL or 0.1 L

Molarity ( M) = # of moles of solute / volume of solution (L)

Molarity (M) = 0.099 mol / 0.1 L = 0.99mol/ L

3 0
3 years ago
The smallest part of a compound that still acts like that compound is ____.
Leokris [45]
It is a molecule of the compound.
3 0
2 years ago
A certain first-order reaction is 27.5 percent complete in 8.90 min at 25°C. What is its rate constant?
jeyben [28]

Answer:

k= 0.145min^{-1}

Explanation:

Hello there!

In this case, according to the given information, it turns out necessary for us remember that the first-order kinetics is given by:

ln(A/A_0)=-kt

Whereas the 27.5% complete means A/Ao=0.275, and thus, we solve for the rate constant as follows:

k=\frac{ln(A/A_0)}{-t}

Then, we plug in the variables to obtain:

k=\frac{ln(0.275)}{-8.90min}\\\\k= 0.145min^{-1}

Regards!

4 0
3 years ago
What is the name of the compound Ca(NO3)2 ?
natulia [17]

Answer: B) calcium nitrate

5 0
3 years ago
Other questions:
  • Franklin was performing an experiment by combining hydrochloric acid and sodium hydroxide. He measured the mass of his reactant
    14·2 answers
  • When sedimentary rock is exposed to heat and pressure,what does it change into?
    12·1 answer
  • Largest electronegativity element
    8·1 answer
  • Which of the following is NOT a pure substance? A. milk B. oxygen C. water D. carbon dioxide
    5·2 answers
  • In a model of Earth's layers that is determined by physical properties, how might the atmosphere be classified? Would it be part
    9·1 answer
  • Calculate the mass (in grams) of calcium carbonate present in a 50.00 mL sample of an aqueous calcium carbonate standard, assumi
    13·1 answer
  • Wht kind of particles contribute to an overall heating effect on climate?​
    8·2 answers
  • Help me out real quick points and I ain’t no story teller
    15·1 answer
  • Describe how a measuring cylinder can be used to measure the volume of gas produced
    11·1 answer
  • When the sun runs out of hydrogen in its core, it will become larger and more luminous because:.
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!