All categories

4 years ago

Fuels cell automobiles use__ gas as a fuel

Chemistry

2 answers:

4vir4ik [10]4 years ago

6 0

Answer:

Its hydrogen gas

Explanation:

It is commonly used as fuel for automobiles

Ray Of Light [21]4 years ago

3 0

Answer:

hydrogen gas

Explanation:

Fuel cell vehicles use hydrogen gas to power an electric motor. Unlike conventional vehicles which run on gasoline or diesel, fuel cell cars and trucks combine hydrogen and oxygen to produce electricity, which runs a motor.

You might be interested in

How many elements are present in the compound RbMnO4?

ankoles [38]

3 elements

Rubidium
Manganese
Oxygen

Hope this helped☺️

5 0

3 years ago

I really need the help in anyway...

Liono4ka [1.6K]

Answer:

What substance changed physically under all three condition? Copper Wire

What substance changed chemically under all three condition? Steel Wool

What evidence indicates a chemical reaction is occurring? New gases are produced; A phase change has occurred; A color change

Select the three answers that are examples of a chemical reaction. The mixing of an acid and base shows an increase in temperature; after baking bread there is a new odor or smell; when hair is bleached it changes to a lighter color

Which data supports this inference? Baking soda dissolving; A gas formed, creating bubbles

Which experiment best shows evidence of energy being released in a chemical reaction? Heat and light are given off when paper is burned

Which experiment likely resulted in the formation of a precipitate? Two solutions are mixed together and a yellow solid forms

The BEST evidence for a chemical reaction is the formation of a new substance.

Explanation:

2. When heat and light are being given off, energy is being released. Paper burning is a chemical reaction b/c when paper is burnt, it is a new substance and the act can't be undone.

3. When a yellow solid forms, that solid is the participate.

4. You will for sure have a chemical reaction if a new substance is created.

5. Copper wire changed physically b/c the copper wire can be returned to its original condition in all of these situations and no new substance was formed. Steel Wool changed chemically b/c it can't be returned to its original state under any condition and new substances were formed every time.

6. New substances formed indicate a chemical reaction. A color change also is an indication of a chemical reaction.

7. When a substance can't be turned into its original position or a new substance is produced, a chemical reaction occurred.

6 0

3 years ago

Consider a bond between boron and oxygen. Which atom would you expect to bear the partial negative charge?

horsena [70]

Oxygen is more electronegative than boron. It has more tendency to attract a electron pair while boron is electropositive that means it has more tendency to lose an electron so when there will be a bond between boron and oxygen than boron carries the partial positive charge while oxygen carries the partial negative charge.

6 0

3 years ago

If we start with 1.000 g of strontium-90, 0.805 g will remain after 9.00 yr. This means that the of strontium-90 is ________ yr.

lesantik [10]

The question is incomplete, here is the complete question.

If we start with 1.000 g of strontium-90, 0.805 g will remain after 9.00 yr. This means that the half-life of strontium-90 is ________ yr.

a. 28.8 b. 30.9 c. 35.4 d. 32.2

Answer : The half-life of strontium-90 is 28.8 years.

Explanation :

This is a type of radioactive decay and all radioactive decays follow first order kinetics.

First we have to calculate the rate constant.

Expression for rate law for first order kinetics is given by :

$k=\frac{2.303}{t}\log\frac{a}{a-x}$

where,

k = rate constant

t = time taken for decay process = 9.00 year

a = initial amount or moles of the reactant = 1.000 g

a - x = amount or moles left after decay process = 0.805 g

Putting values in above equation, we get:

$k=\frac{2.303}{9.00}\log\frac{1.00}{0.805}$

$k=0.0241\text{ year}^{-1}$

To calculate the half-life, we use the formula :

$k=\frac{0.693}{t_{1/2}}$

$0.0241\text{ year}^{-1}=\frac{0.693}{t_{1/2}}$

$t_{1/2}=28.8\text{ years}$

Therefore, the half-life of strontium-90 is 28.8 years.

5 0

3 years ago

Consider the reaction pathway graph below. Which method would provide evidence to support the inference that this is an exotherm

katrin [286]

<h3>Answer;</h3>

-Subtract E from D

<h3>Explanation;</h3>

An exothermic reaction is a type of reaction that involves loss of energy to the environment or the surroundings. Endothermic reactions are the other type of reactions in which heat is absorbed from the surroundings into the system.
In exothermic reactions, the energy of reactants is more than that of the products, and therefore, the enthalpy change is negative.
Enthalpy change = energy of products - energy of reactants.
In this case, the method that would provide evidence to support that the reaction is exothermic is by subtracting E from D, as E is the energy of reactants while D is the energy of products.

4 0

3 years ago

Read 2 more answers