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3 years ago

What new characteristic did John Dalton add to the model of the atom?

Biology

2 answers:

zhannawk [14.2K]3 years ago

6 0

(D)an atom can join with other kinds of atoms.

Basically he explained what a molecule is.

denis-greek [22]3 years ago

5 0

Answer:

An atom can join with other kinds of atoms. is the correct answer.

Explanation:

John Dalton proposed the atomic theory, advanced physical science was based on this theory.

The atom may be connected with different atoms, related or another, to form a molecule.

Dalton's atomic theory stated that all matter was made of atoms.

new characteristic that John Dalton add to the model of the atom is (An atom can join with other kinds of atoms) J

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Your friends are worried because their newborn sleeps 16 or 17 hours a day. what would you tell them?

just olya [345]

It may be perfectly healthy that their newborn is sleeping this long so unless they start displaying other strange symptoms that cause concern, there is no need to worry. They could suggest that they are concerned to the midwife if they feel anxious, to get a professional opinion.

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3 years ago

Two black guinea pigs of the same genotype were mated and produced 29 black and 9 white offspring. what would you predict the ge

Archy [21]

Hey there!

It can be assumed that the two black guinea pigs have one dominant gene, black fur, and one recessive gene, white fur. Using BB, Bb, and bb, when you look at this on a Punnett square, one out of the four boxes will be BB, which will end up with black fur, two boxes will be Bb, which will also end up with black fur, and one box will be bb, which will end up with white fur. If the parent guinea pigs were BB, all of the offspring would be black. If they were bb, they would be white instead of black.

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3 years ago

How many grams of the compound in the figure above are required to make 1 liter of a 0.5 M solution? (Note: The atomic masses, i

Dafna1 [17]

Answer:

This question is incomplete as there is no figure in the question but the compound in the figure is Ethanoic acid (CH3COOH). Hence, we can calculate the mass.

The answer is: 30grams

Explanation:

According to the question, the volume of the compound (CH3COOH) is 1litre while the molar concentration is 0.5M

Molarity or Molar concentration is calculated using the formula:

M= n/V

Where; M= Molarity (M) = 0.5M

n= number of moles (mol)

V= Volume (V) = 1L

Hence, number of moles (n) = M × V

n = 0.5 × 1

n = 0.5 moles.

To calculate the mass in grams of CH3COOH, we say;

Number of moles (n) × molar mass (MM)

Since atomic mass for (C= 12, H= 1 and O=16)

Molar mass of CH3COOH:

= 12 + 1(3) + 12 + 16 + 16 + 1

Molar mass of CH3COOH = 60g/mol

Mass (in grams) of CH3COOH = 0.5 moles × 60g/mol

Mass = 30grams.

Therefore, 30grams of CH3COOH compound are required to make 1 liter of a 0.5 M solution.

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3 years ago

The process of evolution involves changes in the genetic makeup of a population over a period of time. Sexual reproduction enhan

Anika [276]

The answer would have to be A

6 0

3 years ago

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In an individual of genotype aa, where are the a and a alleles physically located? view available hint(s) in an individual of ge

Alex787 [66]

Answer:

One allele is on one chromosome, and the other is in the same position (locus) on the homologous chromosome.

Explanation:

The genotype of an organism refers to the genetic makeup or complete set of genes. The genes control the trait of an organism and exist in an organism in their alternative form called alleles.

Since the alleles are the alternative form of a gene, therefore, they must be present at the same position called a locus.

These alleles are present on the homologous chromosome in which each homologous chromosome is contributed by each parent. Therefore when the genotype is aa then a and a allele will be present on homologous chromosomes in the same position.

Thus, the selected option is correct.

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3 years ago

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