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3 years ago

Help please...

Chemistry

1 answer:

Neko [114]3 years ago

3 0

Bestie this subject is scinece.....

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Which procedure could a student use to examine an intensive property of a rectangular block of wood

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An intensive property does not change when you take change when you take away some of the sample the producers that a student could use to examine the intensive property of a rectangular block of wood

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3 years ago

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Which of the following pairs of substances form a buffer system for human blood?

ss7ja [257]

Answer:

d. Because those chemicals are easily made when CO2 reacts with water, forming H2CO3 (via carbonic anhydrase

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2 years ago

WILL MARK BRAINLIEST!!!!

Lyrx [107]

Answer:

5.702 mol K₂SO₄

General Formulas and Concepts:

Atomic Structure

Reading a Periodic Table
Compounds
Moles

Stoichiometry

Using Dimensional Analysis

Explanation:

Step 1: Define

[Given] 993.6 g K₂SO₄

[Solve] moles K₂SO₄

Step 2: Identify Conversions

[PT] Molar Mass of K: 39.10 g/mol

[PT] Molar Mass of S: 32.07 g/mol

[PT] Molar mass of O: 16.00 g/mol

Molar Mass of K₂SO₄: 2(39.10) + 32.07 + 4(16.00) = 174.27 g/mol

Step 3: Convert

[DA] Set up: $\displaystyle 993.6 \ g \ K_2SO_4(\frac{1 \ mol \ K_2SO_4}{174.27 \ g \ K_2SO_4})$
[DA] Divide [Cancel out units]: $\displaystyle 5.7015 \ mol \ K_2SO_4$

Step 4: Check

Follow sig fig rules and round. We are given 4 sig figs.

5.7015 mol K₂SO₄ ≈ 5.702 mol K₂SO₄

7 0

3 years ago

The use of lead paint in houses was banned in 1978 due to the health hazards associated with lead, specifically that high levels

arlik [135]

Environmental Chemistry studies the health hazards associated with lead, which is dangerous to humans.

Environmental Chemistry studies chemicals present in air, water and soil and their impact on humans and their environment.

Now, it was discovered that even low doses of lead particles in the paint when inhaled or ingested caused damaging effect to the body such as Impaired balance, seizures, ataxia and even death.

With the role of Environmental chemists in thier research and findings, the world has been informed on the negative effect on the expose of lead and other heavy metals like it to man and his environment.

See more here:brainly.com/question/22517940

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2 years ago

4. Identify What do scientists call a substance that forms during a chemical reaction?

ioda

Answer:

4. Reactant

5. Left

I hope this helps ❤️❤️

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3 years ago