If a Hh mom has an offspring with a hh dad, what is the probability that the offspring will have a dominant phenotype?

Covalent bonding is the ____ of electrons

taurus [48]

Answer: sharing

Reason: They do this to gain stability. The reason they don’t actually transfer is because the difference in electronegativity values are above a certain value.

8 0

3 years ago

Select all of the following equations that represent an exothermic reaction.

skelet666 [1.2K]

Exothermic reactions:

1) release heat to the surroundings

2) the change of enthalpy, ΔH, is negative: ΔH < 0

3) the temperature of the system increases

With that you can conclude about every equation given:

<span>NH3(g) + 12.0 kcal → ½N2(g) + 3/2 H2(g) : is not exothermic because heat in the side of the reactants means that heat is being used, not released.

C(graphite) → C(diamond), ΔH = - 0.45 kcal : is exothermic because ΔH is negative

C + 2S → CS2, ΔH = 27,550 cal: is not exothermic because ΔH is positive

CH4 + 2O2 → CO2 + 2H2O + 212,800 cal : is exothermic because heat appears as a product of the reaction, which means that it is released.

2H2O → 2H2 + O2, ΔH = +58 kcal : is not exothermic because ΔH is positive.</span>

3 0

3 years ago

What amount of the excess reagent remains when 0.30 mol NH3 reacts with 0.40 mol O2 to produce NO and H2O? 4NH3 +502 + 4NO + 6H2

nirvana33 [79]

Answer: (D) 0.025 mol $O_2$

Explanation:

The given balanced equation is :

$4NH_3+5O_2\rightarrow 4NO+6H_2O$

According to stoichiometry :

4 moles of ammonia $(NH_3)$ reacts with = 5 moles of oxygen $(O_2)$

Thus 0.30 moles of ammonia $(NH_3)$ reacts with = $\frac{5}{4}\times 0.30=0.375$ moles of oxygen $(O_2)$

Now as given moles of oxygen are more than the required amount, oxygen is the excess reagent.

moles of oxygen $(O_2)$ left = 0.40 - 0.375 = 0.025

Thus 0.025 mol $O_2$ excess reagent remains.

7 0

3 years ago

Draw the Lewis structures of N2H4, N2H2, and N2.Draw the molecules by placing atoms on the grid and connecting them with bonds.

tamaranim1 [39]

Answer:

The structures are shown below

Explanation:

To draw the Lewis structure, we must place the central atom with its valence electrons surrounded by the other atoms, with their valence electrons, then, using lines, we put the bonds (simple line for 1 pair sharing, a double line for 2 pairs sharing, and triple line for 3 pairs sharing).

For N₂H₄, the two nitrogens are bonded together and with two hydrogens, Nitrogen has 5 valence electrons, and hydrogen 1 valence electron, so, 3 bonds will be done by nitrogen, so there will one lone pair in the structure for each nitrogen, and none for hydrogen. The structure is shown below.

For the N₂H₂, the nitrogens are bonded together, sharing two pairs of electrons, and are each one is bonded to a hydrogen, sharing one pair of electrons. Both nitrogen, then, has one lone pair of electron. The structure is shown below.

For the N₂, the two nitrogens are sharing three pairs of electrons, and both have one lone pair of electron. The structure is shown below.

5 0

3 years ago

Identify all of the real-world examples of capillary action below.

larisa86 [58]

Answer:

Water getting from the roots of a plant to the leaves

Fabric wicking away moisture

I believe these two are the answers, because capillary action is when water goes through very narrow spaces and works against the force of gravity. i hope this helps :)

8 0

3 years ago