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3 years ago

SUPPER EASY WILL GIVE BRAINLIEST NEED HELP ASAP

Chemistry

2 answers:

vfiekz [6]3 years ago

8 0

Answer:

Explanation:

You can tell when a chemical change occurs if a gas is produced (bubbles), an odor is produced, if there is a color change, or if the surroundings get hotter or colder.

emmainna [20.7K]3 years ago

7 0

Answer:

Your answer will be (D).

Hope this helps!

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During photosynthesis, plant leaves take in carbon dioxide through _______ in their leaves. a stomata b xylem c phloem

Iteru [2.4K]

<h3>Answer:</h3>

Stomata

<h3>Explanation:</h3>

Photosynthesis refers to the process that takes place in green plants and some algae.
During the process, water and carbon dioxide are converted to nutrients or organic compounds using energy from sunlight.
The process takes place in the chloroplast on the leaves of green plants.
The water used during photosynthesis comes from the soil and then transported by xylem tissue to the leaves where the process takes place.
Carbon dioxide enters the leaves through the stomata which are the sites for gaseous exchange.
Sunlight is trapped by green pigments on the leaves known as chlorophyll.

7 0

3 years ago

PLEASE HELP ME SOLVE THIS.Thank you so much!

Tju [1.3M]

Answer: The coefficients for the given reaction species are 1, 6, 2, 3.

Explanation:

The given reaction equation is as follows.

$Cr_{2}O^{2-}_{7} + Cl^{-} \rightarrow Cr^{3+} + Cl_{2}$

Now, the two half-reactions can be written as follows.

Reduction half-reaction: $Cr_{2}O^{2-}_{7} + 3e^{-} \rightarrow Cr^{3+}$

This will be balanced as follows.

$Cr_{2}O^{2-}_{7} + 14H^{+} + 6e^{-} \rightarrow 2Cr^{3+} + 7H_{2}O$ ... (1)

Oxidation half-reaction: $Cl^{-} \rightarrow Cl_{2} + 1e^{-}$

This will be balanced as follows.

$6Cl^{-} \rightarrow 3Cl_{2} + 6e^{-}$ ... (2)

Adding both equation (1) and (2) we will get the resulting equation as follows.

$Cr_{2}O^{2-}_{7} + 14H^{+} + 6Cl^{-} \rightarrow 2Cr^{3+} + 3Cl_{2} + 7H_{2}O$

Thus, we can conclude that coefficients for the given reaction species are 1, 6, 2, 3.

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3 years ago

What are acids? List few substances containing acid.

Gelneren [198K]

An acid is any substance that in water solution tastes sour, changes blue litmus paper to red, reacts with some metals to liberate hydrogen, reacts with bases to form salts, and promotes chemical reactions.
toothpaste
vinegar
baking soda
soap
ammonia

3 0

2 years ago

Read 2 more answers

6. Explain why there is no base unit for the dimension of volume.

weqwewe [10]

Because in SI, the expectation is that area and volume will be expressed in terms of a linear dimension( the metre) or its multiples.

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3 years ago

Balanced equation of magnesium metal and hydrochloric acid

Setler79 [48]

The balanced chemical equation is,

2Mg+2HCl→2MgCl+H2↑

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4 years ago