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
Vinvika [58]
3 years ago
15

Which one is heavier a pound of feathers or a pound of bricks?I already know oof!!

Chemistry
2 answers:
stepan [7]3 years ago
3 0

Answer:

their weight should be equal.

WAIT a pound of bricks is heavier?

Explanation:

vova2212 [387]3 years ago
3 0

Answer:

They are equal. They are both a pound.

Explanation:

You might be interested in
WHAT IS THE CHEMICAL NAME FOR ALKYNE HAVING
madreJ [45]

Answer:

Ee your house 6r2f5r56rrrr6gjyf

Explanation:

4 0
2 years ago
Consider a neutrally charged atom that has an atomic mass number of 80, which includes 35 neutrons. how many electrons does this
ivanzaharov [21]
Atomic mass number is the number of protons and neutrons. Subtract 80-35=45 is the number of protons. Because the atom is neutrally charged, the number of protons must equal the number of electrons, so there are 45 electrons.
5 0
4 years ago
Read 2 more answers
Which form of energy can be connected closely to climate change?
Art [367]

Answer:

COAL

Explanation:

4 0
3 years ago
Hurry PLEASE HELP!
avanturin [10]

B. 11,540

<h3>Further explanation </h3>

The atomic nucleus can experience decay into 2 particles or more due to the instability of its atomic nucleus.  

Usually radioactive elements have an unstable atomic nucleus.  

General formulas used in decay:  

\large{\boxed{\bold{N_t=N_0(\dfrac{1}{2})^{t/t\frac{1}{2} }}}

T = duration of decay  

t 1/2 = half-life  

N₀ = the number of initial radioactive atoms  

Nt = the number of radioactive atoms left after decaying during T time  

Nt=25 g

No=100 g

t1/2=5770 years

\tt 25=100\dfrac{1}{2}^{T/5770}\\\\\dfrac{1}{4}=\dfrac{1}{2}^{T/5770}\\\\2=T/5770\rightarrowT=11540~years

7 0
3 years ago
Use Hess's Law to calculate the enthalpy change for the reaction
Marysya12 [62]

Answer:

ΔH = 125.94kJ

Explanation:

It is possible to make algebraic sum of reactions to obtain ΔH of reactions (Hess's law). In the problem:

1. 2W(s) + 3O2(g) → 2WO3(s) ΔH = -1685.4 kJ

2. 2H2(g) + O2(g) → 2H2O(g) ΔH = -477.84 kJ

-1/2 (1):

WO3(s) → W(s) + 3/2O2(g) ΔH = 842.7kJ

3/2 (2):

3H2(g) + 3/2O2(g) → 3H2O(g) ΔH = -716.76kJ

The sum of  last both reactions:

WO3(s) + 3H2(g) → W(s) + 3H2O(g)

ΔH = 842.7kJ -716.76kJ

<h3>ΔH = 125.94kJ </h3>
3 0
3 years ago
Other questions:
  • Determine the number of molecules present in a 4.56 mol sample of methane gas (CH4); then determine the number of hydrogen atoms
    10·1 answer
  • Why does iron not fit the pattern in column 7
    13·1 answer
  • What is significant about the elements within the same group of the periodic table?
    14·1 answer
  • Which of the following will have the slowest rate of diffusion at a given temperature?
    10·1 answer
  • Please answer ASAP 10 points ​
    8·2 answers
  • An 18.5 g sample of tin (molar mass = 118.7) combines with
    5·1 answer
  • How many atoms are here in the following?
    10·1 answer
  • Why does air have different pressures
    8·1 answer
  • 1. What is the molar mass of silicon?
    13·1 answer
  • Can you make a solution with a pH of 7 by changing ions?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!