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3 years ago

What function does a cell wall serve for a plant?

Chemistry

1 answer:

oee [108]3 years ago

7 0

It provides the plant cell with structure and support, along with protection from bursting due to turgor pressure

Explanation:

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Rank the following elements by increasing atomic radius: carbon, aluminum, oxygen, potassium. Rank the following elements by inc

Lapatulllka [165]

The trend of atomic radius in the periodic table is increasing from right to left and from top to bottom. In reference to the table, oxygen has smaller radius compared to carbon, which is smaller than aluminum and which is also smaller than potassium. Thus, the trend from smallest to biggest is oxygen carbon, aluminum and potassium.

8 0

4 years ago

Which of the following best describes a decomposition reaction?

Ilia_Sergeevich [38]

The last one/D (my answer has to be at least 20 characters so idk it is what it is)

5 0

3 years ago

Read 2 more answers

Magnesium bromide is an ionic compound with the chemical formula MgBr2, Magnesium is

denis23 [38]

Answer:

These are Magnesium bromide is MgBr2. “ionic compounds.” When atoms join together, they form either molecules or ionic compounds, depending on whether they are joined by covalent bonds or ionic bonds. ... When atoms join together by ionic bonds, they form “ionic compounds”.

Explanation:

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4 0

3 years ago

What energy change occurs during condensation? Please answer, i’ll give you brainliest !

kupik [55]

Answer:

Please see Explanation and Attachment (Heating Curve for Water)

Explanation:

Energy change associated with phase change in substances is either endothermic (energy added to system) or exothermic (energy removed from system). Condensation is but one term in six (6) describing phase change occurring when energy change is involved. The following table, in general, summarizes the related effects of energy change as applied to phase change.

Process Phase Change Energy Change*

Condensation gas => liquid Exothermic

Evaporation liquid => gas Endothermic

Freezing liquid => solid Exothermic

Melting solid => liquid Endothermic

Sublimation solid => gas Endothermic

Deposition gas => solid Exothermic

_____________________

* Energy Change terms:

Endothermic => Addition of heat energy

Exothermic => Removal of heat energy

7 0

3 years ago

2H2 + O2 --> 2H2OHow many moles of hydrogen gas are needed to produce 120g of water?

wlad13 [49]

<h2>Answer:</h2>

6.67moles

<h2>Explanations:</h2>

Given the balanced chemical reaction between hydrogen and oxygen expressed as:

$2H_2+O_2\rightarrow2H_2O$

First, you need to calculate the moles of water produced.

$\begin{gathered} \text{Moles}=\frac{Mass}{\text{Molar mass}} \\ \text{Moles of water=}\frac{120}{2(1)+16} \\ \text{Moles of water}=\frac{120}{18} \\ \text{Moles of water}=6.67\text{moles} \end{gathered}$

Based on stochiometry, 2 moles of hydrogen produces 2 moles of water, hence the moles of hydrogen that will be needed to produce 120g of water is 6.67moles

6 0

1 year ago