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3 years ago

Which method of galaxy formation is expected to dominate far in the future? (1 point

Chemistry

1 answer:

nevsk [136]3 years ago

6 0

Answer:

Dark Matter

Explanation:

90 percent of the mass in the universe is dark matter

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One of the major problems in using solar energy is O speed O heat O cost

Paha777 [63]

Cost because yes its cost

7 0

3 years ago

Balance the equation and identify the type of reaction for ? P4(s) + ? Ca(s) → ? Ca3P2(s). 1. 2; 6; 2 — decomposition 2. 2; 6; 2

pishuonlain [190]

Answer:

4. 1; 6; 2 — synthesis

Explanation:

Decomposition reaction is defined as the reaction in which a single large substance breaks down into two or more smaller substances.

$AB\rightarrow A+B$

Single displacement reaction is defined as the reaction in which more reactive element displaces a less reactive element from its chemical reaction.

The reactivity of metal is determined by a series known as reactivity series. The metals lying above in the series are more reactive than the metals which lie below in the series.

$A+BC\rightarrow AC+B$

Synthesis reaction is defined as the reaction in which smaller substances combine in their elemental state to form a larger substance.

$A+B\rightarrow AB$

The unbalanced combustion reaction is shown below as:-

$P_4+Ca\rightarrow Ca_3P_2$

On the left hand side,

There are 4 phosphorus atoms and 1 calcium atom

On the right hand side,

There are 2 phosphorus atoms and 3 calcium atoms

Thus,

Right side, $Ca_3P_2$ must be multiplied by 2 to balance phosphorus.

Left side, $Ca$ is multiplied by 6 so to balance the whole reaction.

Thus, the balanced reaction is:-

$P_4+6Ca\rightarrow 2Ca_3P_2$

Thus, answer:- 4. 1; 6; 2 — synthesis

5 0

3 years ago

For the reaction system, h2(g) + x2(g) ↔ 2 hx(g), kc = 24.4 at 300 k. a system made up from these components which is at equilib

Pavel [41]

Kc=24.4=[HX]∧2/[H2]×[X2] =(0.6)∧2/(0.2)×[H2]
[H2] = 0.36/(24.4×0.2) = 0.07377 mole

4 0

4 years ago

Read 2 more answers

Bombardier beetles inject boiling hydrogen peroxide, or H2O2, into their victims. It then decomposes into hydrogen and oxygen ga

victus00 [196]

I hope u got ur answer right

4 0

3 years ago

___________ have a charge of +1.

stiv31 [10]

Answer:

B) Protons

Explanation:

A proton has positive charge of 1.
Electrons are the negatively charged particles of atom.
An atom consists of a positively charged nucleus surrounded by one or more negatively charged particles called electrons
To find the ionic charge of an element you'll need to consult your Periodic Table. On the Periodic Table metals (found on the left of the table) will be positive. Non-metals (found on the right) will be negative.

3 0

3 years ago