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
lisov135 [29]
2 years ago
8

What’s the answer? I need an answer as soon as possible please!

Chemistry
2 answers:
inysia [295]2 years ago
5 0

Answer:

1, 1, 2

Explanation:

1, 1, 2

balandron [24]2 years ago
4 0
N2O5 + H2O → 2HNO3

The coefficients for the N2O5 and H2O are technically 1; if you must provide a value for those reactants, then that would be it.
You might be interested in
What is the percent copmosition of chromium in CrF3
zepelin [54]
47.707% is the answer
5 0
3 years ago
J. Explain how an atom's valence electron configuration determines its place on the periodic table.​
Darya [45]

Answer:

Elements having same valence electrons are placed in <u>same group.</u>

Explanation:

First, let's start with some basic concepts of modern periodic table:

1. Modern Periodic table : It is the arrangement of element in the increasing order of their atomic numbers

The Modern periodic table is divided into Periods and groups .

Periods : These are the horizontal rows. There are seven periods in the periodic table . Period 1 has 2 element. Period two and three has 8 elements , period 4 and 5 have 18 elements and the period 6 and 7 have 32 elements.

Same period have same number of atomic orbital(Shell)

Group : The group is the vertical columns . There are 18 groups in the modern periodic table.Those element which have same group number will also have same number of electron in their outermost shell. The number of electron in the outermost shell determines the valency of the element.

So, elements showing same valency are placed in same group.

All alkali are place in group 1 and have 1 valance electron in the outermost shell

5 0
3 years ago
How many moles of water are produced if 5.43 mol PbO2 are consumed?<br><br> ANSWER: 10.9
Arada [10]

Answer: 10.9 mol.

Explanation:

  • To understand how to solve this problem, we must mention the reaction equation where water produced from PbO₂.

Pb + PbO₂ + 2H₂SO₄ → 2PbSO₄ + 2H₂O

  • Now, it is a stichiometric oriented problem, that 1 mole of PbO₂ produces 2 moles of H₂O.

Using cross multiplication:

1.0 mole of PbO₂ → 2.0 moles of H₂O

5.43 moles of PbO₂ → ??? moles of water

The moles of water produced = (5.43 x 2.0) = 10.86 moles ≅ 10.9 moles.

4 0
3 years ago
Read 2 more answers
How can a material get a charge?
svet-max [94.6K]

Explanation:

By losing or gaining electrons from its outermost orbit

8 0
2 years ago
Read 2 more answers
I want to know the steps.
Artyom0805 [142]

The answer for the following problem is described below.

<em><u> Therefore the standard enthalpy of combustion is -2800 kJ</u></em>

Explanation:

Given:

enthalpy of combustion of glucose(ΔH_{f} of C_{6}H_{12} O_{6}) =-1275.0

enthalpy of combustion of oxygen(ΔH_{f} of O_{2}) = zero

enthalpy of combustion of carbon dioxide(ΔH_{f} of CO_{2}) = -393.5

enthalpy of combustion of water(ΔH_{f} of H_{2} O) = -285.8

To solve :

standard enthalpy of combustion

We know;

ΔH_{f}  = ∈ΔH_{f} (products) - ∈ΔH_{f} (reactants)

C_{6}H_{12} O_{6} (s) +6 O_{2}(g) → 6 CO_{2} (g)+ 6 H_{2} O(l)

ΔH_{f} = [6 (-393.5) + 6(-285.8)] - [6 (0) + (-1275)]

ΔH_{f} = [6 (-393.5) + 6(-285.8)] - [0 - 1275]

ΔH_{f} = 6 (-393.5) + 6(-285.8)  - 0 + 1275

ΔH_{f} = -2361 - 1714 - 0 + 1275

ΔH_{f} =-2800 kJ

<em><u> Therefore the standard enthalpy of combustion is -2800 kJ</u></em>

7 0
2 years ago
Other questions:
  • Which three quantum numbers are associated with the 4d orbital?
    5·1 answer
  • 2.70 feet is the same as how many cm?
    9·1 answer
  • A 50 L cylinder is filled with argon gas to a pressure of 10130.0 kPa at 300°C. How many moles of argon gas does the cylinder co
    11·1 answer
  • The angular momentum quantum number for the outermost electrons in a phosphorus atom in the ground state is __________.
    8·1 answer
  • classify each solution as either an acid or a base using the properties that are stated. what are two ways these solutions are s
    9·1 answer
  • Which is the advantage of water’s heat capacity? A. it protects aquatic life from changes in air temperature B. it supports prec
    6·2 answers
  • What is the energy of one photon of red light that has a wavelength of 678 nm?
    13·1 answer
  • 12. Chubchub runs a 440m lap in 1.2 minutes. How many laps will Chubchub
    13·1 answer
  • When naming compounds part of the second element's name is dropped and what is added in its place?
    12·1 answer
  • PLS I WILL GIVE BRAINLY How do the number of violence electrons of the light metals compared to those heavier than boron
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!