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nadezda [96]
3 years ago
5

What initial observation led to the Alvarez asteroid-impact theory? a large undersea crater off the coast of the Yucatan Peninsu

la in Mexico high iridium levels in a 66-million-year-old clay layer in Denmark and Italy large concentrations of shock-fractured quartz in rock layers found in Europe dinosaur remains found near a large crater formed by an asteroid impact
Chemistry
2 answers:
Naddik [55]3 years ago
8 0

Answer:

The answer is high iridium levels in a 66-million-year-old clay layer in Denmark and Italy so basically B

Explanation:

I just did the assessment on edg let me know how you did!!!!!!

Nikitich [7]3 years ago
6 0

Answer: high iridium levels in a 66- million-year-old clay layer in Denmark and Italy

Explanation:

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What are zebra mussels?
amm1812

Answer:

The zebra mussel is a small freshwater mussel.

4 0
3 years ago
Which of the following is not true of alloys?
Scilla [17]
Option d: copper.

Because copper is an element, not a mixture.

7 0
4 years ago
Calculate the volume in cm^3 of 325.0 dg of alcohol. Alcohol has a density of 0.785g/mL.
Masteriza [31]
Answer:
106 mL

Explanation:
In order to be able to answer this question, you must understand what the density of a substance tells you.
The density of a substance is nothing more than the mass of that substance that occupies one unit of volume.
In your case, the density of ethanol is given in Grams per milliliter, which means that one unit of volume will be
1 mL
.
So, ethanol has a density of
0.785 g mL
−
1
, which is equivalent to saying that if you take exactly
1 mL
of ethanol and weigh it, you will end up with a mass of
0.785 g
.
Now, you know that the volume you're using has a mass of
83.3 g
. Well, if you get
0.785 g
for every
1 mL
of ethanol, it follows that this much mass will correspond to a volume of
83.3
g ethanol
⋅
ethanol's density

1 mL
0.785
g ethanol
=
106.11 mL
Rounded to three sig figs, the answer will be
V
ethanol
=
106 mL



Hope this helps
5 0
3 years ago
In a particular mass of kau(cn)2, there are 6.66 × 1020 atoms of gold. What is the total number of atoms in this sample?
Vinvika [58]

Total number of atoms in the sample is the sum of number of atoms of all the elements present in the sample.

Number of gold, Au atoms in KAu(CN)_2 = 6.66\times 10^{20} atoms     (given)

From the formula of compound that is KAu(CN)_2 it is clear that the number of potassium and gold are same whereas those of carbon and nitrogen are 2 times of them.

So, the number of atoms of each element is:

Number of potassium, K atoms in KAu(CN)_2 = 6.66\times 10^{20} atoms    

Number of carbon, C atoms in KAu(CN)_2 = 2\times6.66\times 10^{20} atoms = 13.32\times 10^{20}

Number of nitrogen, N atoms in KAu(CN)_2 = 2\times6.66\times 10^{20} atoms = 13.32\times 10^{20}

Total number of atoms in KAu(CN)_2 = Number of gold, Au atoms+Number of potassium, K atoms +Number of carbon, C atoms + Number of nitrogen, N atoms

Total number of atoms in KAu(CN)_2 = 6.66\times 10^{20}+6.66\times 10^{20}+13.32\times 10^{20}+13.32\times 10^{20}

Total number of atoms in KAu(CN)_2 = 39.96\times 10^{20} atoms

Hence, the total number of atoms in KAu(CN)_2 is 3.996\times 10^{21} atoms.

7 0
3 years ago
A(n) ____ is a substance that produces H+ ions in a water solution.
neonofarm [45]

Answer:

Electron

Explanation:

Hydrogen ion, is strictly, the nucleus of a hydrogen atom and can be separated from its accompanying electron.

7 0
4 years ago
Read 2 more answers
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