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
Firlakuza [10]
3 years ago
14

Please help only one question. will mark brainliest if solved​

Chemistry
2 answers:
mel-nik [20]3 years ago
8 0

Answer:

c i think

Explanation:

look at the first one on a the bubble has a e on the side

mamaluj [8]3 years ago
3 0
Answer : C
Explanation: If you look at the isotopic symbol there’s 2 protons on both so on each atom there should be 2 protons
You might be interested in
NEED HELP!!! PLEASE, AND THANK YOU!!! ^^ <3
Aneli [31]

Answer:

B

Explanation:

7 0
3 years ago
Read 2 more answers
H2 + NO → H2O + N2<br><br><br> If 180.5 grams of N2 are produced, how many grams of H2 were reacted?
Lena [83]

Answer:

12.89 moles

Explanation:

Before we solve the question, we have to balance the equation of the reaction first. The balanced reaction will be:

2 NO + 2 H2→ N2 + 2 H2O

There are 180.5g of N2 produced, the number of produced in moles will be: 180.5g / (28g/mol)= 6.446 moles

The coefficient of H2 is two and the coefficient of N2 is one. Mean that we need two moles of H2 for every one mole of N2 produced. The number of H2 reacted will be: 2/1 * 6.446 moles = 12.89 moles

6 0
4 years ago
What is Gibbs free energy
Alenkinab [10]

Answer:

The minimum amount of energy needed the the cell to perform various cellular,biochemical and physiological activities is known is Gibbs free energy.

Explanation:

The change in gibbs free energy of is very much important to determine whether a given reaction is spontaneous,non spontaneous  or equilibrium.

 1 If gibbs free energy change of a reaction is negative then the reaction is spontaneous.

2  If the free energy change is 0 then the reaction is in equilibrium stage.

3  If free energy change is positive then the reaction is non spontaneous.

4 0
3 years ago
How many moles of c9h8o4 are in a 0.300 g tablet of aspirin?
soldi70 [24.7K]
<span>1.67 x 10^-3 moles Calculate the molar mass of C9H8O4 Carbon = 12.0107 Hydrogen = 1.00794 Oxygen = 15.999 C9H8O4 = 9 * 12.0107 + 8 * 1.00794 + 4 * 15.999 = 180.1558 Now divide the mass you have by the molar mass 0.300 g / 180.1558 g/mole = 1.665225 x 10^-3 Round to 3 significant figures 1.67 x 10^-3</span>
5 0
3 years ago
Si tienes una disolución al 30 % en masa, ¿Cuál sería la nueva concentración si añades agua suficiente hasta duplicar su volumen
Alika [10]

Answer:

17.6% en masa será la nueva concentración de la solución

Explanation:

Una disolución al 30% en masa contiene 30g de soluto en 100g de solución (Solvente + soluto). Así, la masa de solvente (Agua) es:

100g - 30g = 70g

Dado que la densidad del agua es de 1g/mL, 70g de agua ocupan 70mL.

Si el volumen se duplica, habrán 140mL de agua = 140g de solvente.

Así, la masa total de la solución será 30g + 140g = 170g y el porcentaje en masa será:

30g soluto / 170g solución × 100 =

<h3>17.6% en masa será la nueva concentración de la solución</h3>
4 0
3 years ago
Other questions:
  • List two characteristics used to classify an organism
    9·1 answer
  • What are heterogeneous and homogeneous?
    8·1 answer
  • A geological process changes the weather. the Earth’s surface. the Earth’s core . nothing
    10·1 answer
  • Describe what Rutherford would have seen in his gold foil experiment if J.J Thompson's Plum Pudding model was completly accurate
    14·1 answer
  • Which of the following equations is balanced?
    11·1 answer
  • What is the mass of 6.02 x 1022 atoms of Xenon? HELP!!!!!
    11·1 answer
  • How many continents out of the 7 are completely surrounded by water?
    9·2 answers
  • Using the fact that at 0.10 M, the absorbance was 0.357; and at 0.20 M, the absorbance was 0.714, the absorptivity (slope) is
    10·1 answer
  • Determine the number of moles of O,(g) in the cylinder. The gram-formula mass of
    6·1 answer
  • What is one way that potential energy might be involved in rescue team missions?
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!