3 years ago

All combustion reactions release energy true or false

Chemistry

2 answers:

Hitman42 [59]3 years ago

7 0

Answer:

Explanation:

A simpler word for combustion is burn. Heat is given off. That means that energy is released.

The statement is true.

Rina8888 [55]3 years ago

5 0

True because they released the energy from it

You might be interested in

Use Lewis Dot diagrams to illustrate the formation of a covalent bond between

nika2105 [10]

Answer:

bromine has 7 electron valenc because bromine in group VIIA

6 0

3 years ago

The attraction between oppositely charged ions is called

Irina18 [472]

Its called ionic bonding! :^)

3 0

3 years ago

Why is rusted iron an example of an oxidation reduction reaction A. Electrons are exchanged B. Heat is generated C. Iron combine

Karolina [17]

Answer:

Explanation:

Oxygen & water form rust

3 0

4 years ago

3. Gold-198 decays with a half-life of 2.7 days according to the equation:198Au → 0−1β + 198Cd

Nadya [2.5K]

a. k=0.256/day

b.sample of Au-198 remains after seven days : 1.67 g

<h3>Further explanation</h3>

1. A half-life of 2.7 days⇒t1/2=2.7 days

The half-life can be expressed in a decay constant( λ)

$\tt \displaystyle t_ {1/2} = {\dfrac {\ln (2)} {\lambda}}\\\\\lambda(or~k)=\dfrac{0.693}{2.7}=0.256/day$

2. We can use formula : (integrated rate law) :

$\tt ln[A]=-kt+ln[Ao]\\\\ln(\dfrac{Ao}{A})=kt$

Ao=10 g

t=7 days

k=0.256/day

$\tt ln(\dfrac{10}{A})=0.256\times 7\\\\ln(\dfrac{10}{A})=1.792\\\\e^{1.792}=\dfrac{10}{A}\\\\6=\dfrac{10}{A}\rightarrow A=1.67~g$

8 0

3 years ago

Ygyjhu went to the store and bumped into afghsiugshjkds

Tju [1.3M]

Answer:

well dont hurt yourself

Explanation:

its not very good to

4 0

3 years ago