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Chemistry

2 answers:

miss Akunina [59]3 years ago

5 0

The answer is B: sediment

Ghella [55]3 years ago

3 0

Answer:

B sediment

Explanation:

The excess mileage leads to additional pollution. Car exhaust contains toxic gases, and car fluids often leak (oil drips, antifreeze leaks, etc...). The exhaust also contains nitrogen oxide, which can lead to nutrient-related problems in the environment.

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2 Equation on chemistry that I have been struggling with, needed some assistance

crimeas [40]

Answer:

2. Copper (II) carbonate plus sulfuric acid produces copper (II) sulfate and carbon dioxide and water.

We need the "II" after copper to specify what charge it is. It's +2 because carbonate is -2.

3. Calcium hydroxide plus carbon dioxide gas produces calcium carbonate and water.

7 0

3 years ago

The empirical formula for a compound is ch2o and the molar mass is 180.2g mol which is molecular formula for this compound

elena-14-01-66 [18.8K]

Answer:
Molecular Formula = C₆H₁₂O₆

Solution:

Molecular formula is calculated by using following formula,

Molecular Formula = n × Empirical Formula ---- (1)

Also, n is given as,

n = Molecular Weight / Empirical Formula Weight

Molecular Weight = 180.2 g.mol⁻¹

Empirical Formula Weight = 12 (C) + 2 (H₂) + 16 (O) = 30 g.mol⁻¹
Son
n = 180.2 g.mol⁻¹ ÷ 30 g.mol⁻¹

n = 6

Putting Empirical Formula and value of "n" in equation 1,

Molecular Formula = 6 × CH₂O

Molecular Formula = C₆H₁₂O₆

7 0

4 years ago

What two factors must be held constant for density to be a constant ratio?

Neko [114]

Answer:

Temperature and Pressure

Explanation:

Temperature and pressure cause change in volume.

So any change in volume will alter the ratio of density as given by equation of density.

Density = mass/ volume

Change in volume will alter the ratio.

Kindly mark it branliest if the answer is little bit satisfying.

7 0

3 years ago

DNA can be replicated through an in vivo mechanism or a polymerase chain reaction (PCR) mechanism. Match each description to the

umka2103 [35]

Complete question from other source attached

Answer:

Explanation:

Catalyzed by DNA polymerase - both. DNA polymerase catalyzes DNA replication in the cell. However, purified versions of the enzyme are also used to synthesise DNA as part of PCR reactions

involves leading strand synthesis only - PCR. In PCR, lagging strand synthesis is not carried out because the DNA is denatured (rendered single stranded). Therefore, each strand is replicated independently by leading strand synthesis

duplicates a small fragment of the genome - PCR. Usually, to carry out PCR, small sequences called primers are used that specify the region of DNA to be replicated

duplicates the entire genome - in vivo replication - when the DNA is replicated in vivo, the entire genome is replicated. This is carried out prior to cell division so that two daughter cells can each inherit a copy of the entire genome