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8090 [49]
3 years ago
6

Malia is interested in observing cognitive development in children and wants to design a study that will allow her to observe sm

all changes in how 6-year-olds learn to solve problems. She plans to collect data from each child every week for three months.
Which design is her best choice?

A] microgenetic
B] cross-sequential
C] cross-sectional
D] longitudinal
Chemistry
1 answer:
jarptica [38.1K]3 years ago
8 0

Answer: Microgenetic

Explanation: I just took the test :3

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Arrange the following bonds in order of increasing ionic character. assign number 1 as the highest and 6 as the lowest. a. carbo
SIZIF [17.4K]
Answer: Potassium to fluorine, fluorine to nitrogen, bromine to hydrogen, carbon to hydrogen, lithium to chlorine, sodium to chlorine.
Explanation:
Ionic bond is greater when the electronegativity difference existing between the two atoms are large causing the bonding to be more polar.
5 0
2 years ago
What is the percent composition of the u.s quarter, which has the mass of 5.670g
Vitek1552 [10]
The percent composition of each element can be calculated as follows:
% composition = (mass of element / total mass) * 100

The total mass of the quarter is given to be 5.670 grams
Mass of Cu = 5.198 grams
Mass of Ni = 0.472 grams

Substitute in the above equation to get the mass percentage of each element as follows:
% of Cu = (5.198/5.670) * 100 = 91.675%
% of Ni = (0.472/5.670) * 100 = 8.325%
6 0
3 years ago
Needed help plzzz on this chemistry homework.
mrs_skeptik [129]
Hertz is units for frequency. (waves per second)
wavelength = speed/frequency

if you're given the speed use that to calculate, if not then you can probably assume it's a wave of light and use the speed of light (3x10^8 m/s) to calculate.

wavelength = (3x10^8)/(1.28x10^17)
= 0.000000002 m
= 2.34 nm

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What is one way a pathogen can enter the body?
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I’m pretty sure it’s Nose
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Which of the following is a chemical property of water? It ___________.
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