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4 years ago

What might cause average global surface temperature to rise and fall from year to year

1 answer:

4 0

<span>The most likely explanation for the lack of significant warming at the Earth's </span>surface<span> in the past decade or so is that natural climate cycles </span>caused<span> shift.</span>

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Which of the following is a norm or value that sports may socialize children about

Roman55 [17]

Answer is: <span>B to respect authority .
</span>Sport helps that children learn to respect authority, rules, team colleagues and opponents. Sport also helps children to learn skills that will help them in school, build self-esteem, lower levels of antisocial behaviour in children, <span>develops healthy physical activity and habits.</span>

7 0

3 years ago

question if the following elements were involved in a chemical reaction, which one would be most likely to form a cation? respon

Serjik [45]

Fluorine (F) would be least likely to form a cation out of potassium, fluorine, chlorine, and nitrogen.

A cation is a positively charged atom (or molecule) that has lost electrons (or electrons).
The tendency for electropositive elements to lose electrons and produce cations is greater. On the left side of the periodic table, these are often metals.
Going down a group increases electropositivity, or the propensity to lose electrons and generate cations. and decreases across a period. In the given examples:
Potassium, K is an alkali metal and will lose electrons readily to form a cation.
Nitrogen (N), Fluorine (F), and chlorine (Cl) are all nonmetals that prefer to accept electrons and form anions instead. F is the most electronegative i.e. it will gain electrons and form F- rather than F+.

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5 0

1 year ago

Examples of the skills used in science include _____ and _____.

ollegr [7]

In science you want to use observations and measurements.

5 0

3 years ago

A scientist produces zinc iodide (zni2). (a) calculate the minimum mass of zinc that needs to be added to 0.500 g of iodine so t

harina [27]

The minimum mass of Zinc, Zn that needs to be added to 0.500 g of iodine so that the iodine fully reacts is 0.128 g

<h3>Balanced equation </h3>

Zn + I₂ —> ZnI₂

Molar mass of Zn = 65 g/mol

Mass of Zn from the balanced equation = 1 × 65 = 65 g

Molar mass of I₂ = 127 × 2 = 254 g/mol

Mass of I₂ from the balanced equation = 1 254 = 254 g

SUMMARY

From the balanced equation above,

254 g of I₂ required 65 g of Zn

<h3>How to determine the mass of Zn needed </h3>

From the balanced equation above,

254 g of I₂ required 65 g of Zn

Therefore,

0.5 g of I₂ will require = (0.5 × 65) / 254 = 0.128 g of Zn

Thus, the minimum mass of Zn required is 0.128 g

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2 years ago

In pea plants, yellow seeds are dominant to green seeds. A heterozygous yellow-

san4es73 [151]

Answer:

The phenotypic percentage of having yellow or green seeds is 50% for having either of the two colours

Explanation:

The crossing to determine the offsprings is shown in the image attached where we have two green (Yy) seeds and two yellow (yy) seeds as offsprings.

Thus, <u>the phenotypic percentage of having yellow or green seeds is 50% for having either of the two colours</u>.

Note, the dominant allele is "Y" while the recessive allele is "y". Thus, Yy would produce a yellow colour while yy would produce a green colour (as both mentioned in the question).

Also note that phenotype describes the outward properties/characteristics of an individual.

3 0

3 years ago