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Troyanec [42]
3 years ago
10

in the reaction c o2 → co2, 18 g of carbon react with oxygen to produce 72 g of carbon dioxide. what mass of oxygen would be nee

ded in the reaction?
Biology
2 answers:
Alenkasestr [34]3 years ago
5 0
The answer is B, 54 g. Reactants and products have the same mass, so if the product is 72 g of carbon dioxide, and all we know is there is 18 g of carbon, then we can find the difference of 72 and 18 by subtracting 18 from 72 which is 54 g.
Strike441 [17]3 years ago
3 0
From the given balanced chemical reaction,
                                   C + O2 -> CO2
the mass ratio of the carbon and oxygen that is needed for the reaction is 12:32. Simplifying the ratio gives 3 unit mass C is to 8 unit mass O2. Given 18 g of carbon,
           18 g x (32 g oxygen / 12 g carbon) = 48 grams. 
For the given product, the ratio of oxygen to carbon dioxide is 32: 44.
                      72 g CO2 x (32 g O2 / 44 g CO2) = 52.36 grams
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In order to identify the most recent common ancestor of an animal, the physical and genetic makeup of the organisms must be compared. The two organisms must have striking similarities in order to be considered as closely related.

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5 0
3 years ago
Each member of a family of 5 has eye color that is different shade of brown. The fathers eye are a very dark brown, while the mo
Brrunno [24]

Answer:

It is codorminace.

Explanation:

Codorminace is a type of inheritance relationship in which the offspring receive one allele or gene from the father and another gene from the mother and the two allele inherited are not receive rather they are dorminant in the offspring or they are not masked but they are both expressed in the offspring.

From the question, it could be discovered that the offsprings inherit dark brown gene from the father and golden brown from the mother , the two are expressed at they same time and that is why the children shades from light to dark brown.

6 0
3 years ago
In a certain species of plant, the allele to produce green melons (G) is dominant over the allele to produce yellow melons (g).
marishachu [46]

Answer:

4.26

Explanation:

Let the green-melon parents be Gg, then we expect the cross with the yellow-melon plant gg so as to produce 50% Gg and other 50% of gg offspring. What we observed was that 53 green and a 41 yellow. Based on the total number of 94 offspring , we expected half and a half ratios to be 47 of each color.

                                Observed(o)   Expected(e)   (o-e)    $(o-e)^2$      $(o-e)^2/e$

Green-melon plant        53                    47               6          36             0.766

Yellow-melon plant        41                    47              -6          36             0.766

Therefore the chi-square value is 1.53 which is less than the critical value of 3.84. Therefore, the null hypothesis is accepted.

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3 years ago
What height setting of the first hill will cause the 35 g car to reach the egg in 1.88 s?
Butoxors [25]
35g car to reach on egg in 1.88 sec.
 

Its easy 40 because to add and divide.
3 0
3 years ago
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