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Inessa05 [86]
3 years ago
10

State two causes of cracked and sore nipples during breastfeeding

Chemistry
1 answer:
Nadusha1986 [10]3 years ago
5 0
The biting and sucking of the baby when eating.
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Which of the elements shown will not form ions, and why will they not do so?
grigory [225]

No elements visible!

Ions form between metals and non-metals.

Hope this helps!

6 0
2 years ago
A titration is performed on a 25.0 mL sample of calcium hydroxide. A volume of
slamgirl [31]

Answer:

\boxed {\boxed {\sf 0.28 \ M}}

Explanation:

Titration is a method used to determine the concentration of a substance. The  formula for this is:

M_AV_A= M_BV_B

Where M is the molarity of the acid or base and V is the volume of the acid or base.

We know that 46.0 milliliters of a 0.15 molar solution of nitric acid wereused in the titration. 25.0 milliliters of solution of calcium hydroxide of unknown molarity were also used.

\bullet \  M_A= 0.15 \ M \\\bullet \  V_A= 46.0 \ mL\\\bullet \  V_B= 25.0 \ mL

Substitute these known values into the formula.

0.15 \ M * 46.0 \ mL= M_B * 25.0 \ mL

We are solving for the molarity of the base, so we must isolate the variable M_B. It is being multiplied by 25.0 milliliters. The inverse operation of multiplication is division, so we divide both sides of the equation by 25.0 mL.

\frac {0.15 \ M * 46.0 \ mL}{25.0 \ mL}= \frac{M_B * 25.0 \ mL}{25.0 \ mL}

\frac {0.15 \ M * 46.0 \ mL}{25.0 \ mL}= M_B

The units of milliliters (mL) cancel.

\frac {0.15 \ M * 46.0 }{25.0}=M_B

\frac {6.9}{25.0 } \ M =M_B

0.276 \ M = M_B

The original measurements have 2 or 3 significant figures. We always round our answer to the least number of sig figs, which is 2. For the number we calculated, that is the hundredths place. The 6 in the thousandths place tells us to round the 7 up to an 8.

0.28 \ M \approx M_B

The concentration of calcium hydroxide is approximately <u>0.28 M.</u>

6 0
3 years ago
Calculate the number of moles in 9.22 X 10^23 atom iron
sveta [45]
1.53 moles of Fe is your solution hope it helps!
7 0
2 years ago
A story that explains something in nature is called a_______
Daniel [21]

Answer: myth .

Explanation: traditional story, especially one concerning the early history of a people or explaining a natural or social phenomenon, and typically involving supernatural beings or events.

"ancient Celtic myths"

usually traditional story of ostensibly historical events that serves to unfold part of the world view of a people or explain a practice, belief, or natural phenomenon creation myths. b : parable, allegory Moral responsibility is the motif of Plato's myths.

6 0
2 years ago
a sample of 23.2 grams of nitrogen gas is reacted with 23.2 G of hydrogen gas to produce ammonia. using the balanced equation be
Oksanka [162]

Answer:

Hydrogen

Explanation:

First thing's first, we have to write out the balanced chemical equation for the reaction.

This is given as;

N2 + 3H2 --> 2NH3

From the stoichiometrey of the reaction;

Molar mass of N = 14

Molar mass of H = 1

(1 * (14 * 2)) = 28g of N2 reacts with (3 * (1 * 2)) = 6g of H2

This means that if there are equal mass of both Nitrogen and Hydrogen. We would run out of Hydrogen first. This means Hydrogen is our limiting reactant as it determines the amount of products that can be formed.

3 0
3 years ago
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