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yaroslaw [1]
3 years ago
6

19 Down syndrome is a genetic disorder caused by the

Chemistry
1 answer:
Crazy boy [7]3 years ago
6 0
Down Syndrome occurs when an extra #21 chromosome is present
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Which pair of elements show similarities in the pattern of chemical bonding?
tamaranim1 [39]
The answer is A, Lithium and Sodium.
3 0
4 years ago
Read 2 more answers
What makes something solube or insoluble
Olegator [25]

Answer:

fiber

Explanation:

Soluble fiber easily dissolves in water and is broken down into a gel-like substance in the part of the gut known as the colon. Insoluble fiber does not dissolve in water and is left intact as food moves through the gastrointestinal tract

i hope this is right and if not i tried my best to help

3 0
3 years ago
Valine is an essential amino acid, which means that it cannot be manufactured in the body and must be obtained through dietary s
artcher [175]

Answer:

As for what is written, I think that your wording is incomplete, since valine (abbreviated Val or V) is one of the twenty amino acids encoded by DNA on Earth, whose chemical formula is HO2CCH (NH2) CH (CH3) 2. In messenger RNA, it is encoded by GUA, GUG, GUU or GUC. Nutritionally, in humans, it is one of the essential amino acids.

Explanation:

Being an essential amino acid, it speaks of the fact that the organism does not synthesize it, therefore it must be ingested in the daily diet as well as in foods rich in proteins: red meat, chicken, fish, eggs, grains and nuts.

7 0
4 years ago
128.3 grams of methane (CH4) is equal to how many moles of methane
Neko [114]
About 8.0 moles of methane.Number of moles = MassMolar mass.

And thus we get the quotient:

128.3⋅g16.04⋅g⋅mol−1=8.0⋅moles of methane.

Note that the expression is dimensionally consistent, we wanted an answer in moles, and the quotients gives, 1mol−1=11mol=mol as required.

6 0
3 years ago
Read 2 more answers
The gas-phase reaction of NO with F2 to form NOF and F has an activation energy of Ea = 6.30 kJ/mol and a frequency factor of A
NISA [10]

Answer:

2.74 × 10⁸ M⁻¹.s⁻¹ = 2.74 × 10⁸ L.mol⁻¹.s⁻¹

Explanation:

Let's consider the following second-order reaction.

NO(g) + F₂(g) → NOF(g) + F(g)

We can find the rate constant (k) using the Arrhenius equation.

k=A \times e^{-Ea/R\times T}

where,

  • A: frequency factor
  • Ea: activation energy
  • R: ideal gas constant
  • T: absolute temperature (695°C + 273.15 = 968 K)

k=6.00 \times 10^{8} M^{-1}.s^{-1} \times e^{-6.30\times 10^{3}J /(8.314 J/mol.K)\times 968 K} = 2.74 \times 10^{8} M^{-1}.s^{-1}

8 0
3 years ago
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