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Makovka662 [10]
2 years ago
14

If an object has a density of 0.00018 g/cm cubed, what density would it be if it had a mass of 10kg

Chemistry
1 answer:
Vladimir79 [104]2 years ago
3 0

Answer:

Explanation:

first to get the density of some thing you have to devide the mass by the volume so 0.00018 (divided) by 10 kg and that gives you ur answer

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Pure hydrogen (H₂) is a hazardous substance. Thus, safer and more cost effective techniques have been developed to store it as a
Paha777 [63]

Answer: hello your question has some missing details attached below is the missing details

answer : 25.5%  ( B )

Explanation:

<u>Determine percentage yield </u>

molar mass = 35 g/mol

mass of Li₃N(s) = 70 g

product  LiH(s) = 8.0 g ( actual yield )

theoretical yield ( LiH ) =  4 * 7.95  = 31.8 g

percentage yield = actual yield * 100 / theoretical yield

                            = 8 * 100/31.8

                            = 25.5%

4 0
3 years ago
In a solution with a pH of 3.0, the color of
Alinara [238K]

Answer:

A) litmus is red

Explanation:

To answer this question, it can be helpful to have the color charts. Litmus, phenolphthalein and methyl orange are ways to test the pH of a substance.

<u>Litmus paper</u>

Litmus can tell you if a substance is an acid or a base. You need to put the substance on both red litmus and blue litmus paper.

pH < 7: both papers are red. 3.0 is less than 7.

pH = 7: none of them change color

pH > 7: both papers are blue

<u>Phenolphthalein</u>

When this indicator is added to a substance, the result is either colorless or pink.

0 < pH ≤ 7: colorless. The color is not red or blue for pH 3.0.

pH > 7: pink

<u>Methyl orange</u>

0 < pH < 4: red. The color is not yellow if the pH is 3.0.

4 ≤ pH < 5: orange

pH ≥ 5: yellow

5 0
2 years ago
meteorologist preparing a talk about global warming compiled a list of weekly low temperatures (in degrees Fahrenheit) he observ
Setler [38]

Answer:

Regarding Measures of center, the Mean will be smaller, and Median will not be affected. Thus, the median will not change, since the temperature was already low initially and only decreased. However, the median takes the average of all values into account, and if you substitute a value for a smaller value, the average decreases.

In relation to Measures of spread, the range and standard deviation will be larger, and the IQR will not change. Therefore, the range is the highest minus the lowest number; if the lowest number decreases sharply, the range increases. On the other hand, the IQR only counts the first and third quartile values. Therefore, since the value was already the lowest, if it is decreased, it will not change the IQR. However, the standard deviation will increase significantly, as the decreasing value of the lowest data point will increase the overall spread.

Explanation:

6 0
2 years ago
If the same amount of heat is suppliedto all samples of 10.0g each of aluminum iton and copper all at 15 degree celsius which sa
s2008m [1.1K]
When a substance absorbs thermal energy, it partitions some as potential and some as kinetic energy. Specific heat is an expression related to the quantity of heat a substance stores as potential energy; the remainder is absorbed as kinetic which causes the temperature to increase - recall that temperature is a measure of average kinetic energy. 
When specific heat is low, most of the energy is partitioned as kinetic energy and the substance will experience the greatest temperature change. 

So rather than calculating the change in temperature, we can simply inspect the specific heats. The one with the lowest will experience the greatest temperature change. We could also compare the specific heats: Al = .897/.385 ==> 2.3, Fe = .452/.385 = 1.2, Cu = .385/.385 = 1. We can expect Copper's temperature change to be 2.3 times larger than Aluminum's and 1.2 times larger than Iron's.
5 0
2 years ago
While preparing for his first Chemistry exam, Jaden is studying the elements and trying to memorize their abbreviations. On test
Crazy boy [7]

Answer:

The correct option is: Recency effect

Explanation:

Serial position effect is a concept that describes the <u>effect of the position of an item in a sequence on its recall accuracy</u>. According to this theory, in a sufficiently long list of items, an individual is more likely to recall the first and the last items with greater accuracy than the middle items.

There are two types:

<u>1. Recency effect</u>: <u>The items in the end of the list or series are recalled first and more accurately.</u>

<u>2. Primacy effect</u>: The items in the beginning of the list or series are recalled first and more accurately.

In the given example, Jaden can only recall the abbreviation for the <u>last 5 elements in a list of 30 elements</u>. This tendency is known as Recency effect.

3 0
3 years ago
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