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2 years ago

Name the fuel used in rockets

1 answer:

4 0

In the combination with an oxidizer such as liquid oxygen, liquid hydrogen yields the highest specific impulse or efficiency in relation to the amount of propellant of any known rocket propellant

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Choose all the answers that apply.

iVinArrow [24]

Answer:it all above

Explanation:

it all above because all the answer are truth so it all above

8 0

2 years ago

Read 2 more answers

If an atom has 10 protons and electrons how many of the electrons will be valence electrons?

Snezhnost [94]

Answer:

8 of the electrons will be valence electrons

Explanation:

7 0

1 year ago

Read 2 more answers

Methanol can be produced by the following reaction: CO(g) 2 H2(g) CH3OH(g). How is the rate of disappearance of hydrogen gas rel

belka [17]

Answer:

$r_{H_2}=-2r_{CH_3OH}$

Explanation:

Hello!

In this case, for the reaction:

$CO(g)+ 2 H_2(g) \rightarrow CH_3OH(g)$

In such a way, via the rate proportions, that is written considering the stoichiometric coefficients, we obtain:

$\frac{1}{-1} r_{CO}=\frac{1}{-2} r_{H_2}=\frac{1}{1} r_{CH_3OH}$

Whereas the reactants, CO and H2 have negative stoichiometric coefficients; therefore the rate of disappearance of hydrogen gas is related to the rate of appearance of methanol as shown below:

$\frac{1}{-2} r_{H_2}=\frac{1}{1} r_{CH_3OH}\\\\r_{H_2}=\frac{-2}{1} r_{CH_3OH}\\\\r_{H_2}=-2r_{CH_3OH}$

Which means that the rate of disappearance of hydrogen gas is negative and the rate of appearance of methanol is positive.

Regards!

7 0

2 years ago

What are the properties of metals nonmetals and metalloids?

harkovskaia [24]

Metals:
Distinguishing luster (shine)
Malleable and ductile (flexible) as solids
Conduct heat and electricity
Metallic oxides are basic, ionic
Cations in aqueous solution

Nonmetals:
Non-lustrous, various colors
Brittle, hard or soft
Poor conductors
Nonmetallic oxides are acidic, compounds
Anions, oxyanions in aqueous solution

5 0

3 years ago

16.25 g of water at 54 C relaeases 402.7 J. What will be its final temp?

leonid [27]

Data:
Q = 402.7 J → releases → Q = - 402.7 J
m = 16.25 g
T initial = 54 ºC
adopting: c = 4.184J/g/°C
ΔT (T final - T initial) = ?

Solving:

Q = m*c*ΔT
-402.7 = 16.25*4.184*ΔT
-402.7 = 67.99*ΔT
$\Delta\:T = \frac{-402.7}{67.99}$
$\boxed{\Delta\:T \approx -5.92\:^0C}$

If: ΔT (T final - T initial) = ?
$-5.92^0 = T_{final} - 54^0$
$T_{final} = 54^0 - 5.92^0$
$\boxed{\boxed{T_{final} = 48.08\:^0C}}\end{array}}\qquad\quad\checkmark$

8 0

3 years ago

Name the fuel used in rockets​

Name the fuel used in rockets